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linux-sg2042/drivers/gpu/drm/i915/intel_ddi.c

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drm/i915: initialize DDI buffer translations DDI is introduced starting with Haswell GPU generation. So to simplify its management in the future, we also add intel_ddi.c to hold all the DDI-related items. Buffer translations for DDI links must be initialized prior to enablement. For FDI and DP, first 9 pairs of values are used to select the connection parameters. HDMI uses the last pair of values and ignores the first 9 pairs. So we program HDMI values in both cases, which allows HDMI to work over both FDI and DP-friendly buffers. Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-05-10 02:37:20 +08:00
/*
* Copyright © 2012 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* Authors:
* Eugeni Dodonov <eugeni.dodonov@intel.com>
*
*/
#include "i915_drv.h"
#include "intel_drv.h"
/* HDMI/DVI modes ignore everything but the last 2 items. So we share
* them for both DP and FDI transports, allowing those ports to
* automatically adapt to HDMI connections as well
*/
static const u32 hsw_ddi_translations_dp[] = {
0x00FFFFFF, 0x0006000E, /* DP parameters */
0x00D75FFF, 0x0005000A,
0x00C30FFF, 0x00040006,
0x80AAAFFF, 0x000B0000,
0x00FFFFFF, 0x0005000A,
0x00D75FFF, 0x000C0004,
0x80C30FFF, 0x000B0000,
0x00FFFFFF, 0x00040006,
0x80D75FFF, 0x000B0000,
0x00FFFFFF, 0x00040006 /* HDMI parameters */
};
static const u32 hsw_ddi_translations_fdi[] = {
0x00FFFFFF, 0x0007000E, /* FDI parameters */
0x00D75FFF, 0x000F000A,
0x00C30FFF, 0x00060006,
0x00AAAFFF, 0x001E0000,
0x00FFFFFF, 0x000F000A,
0x00D75FFF, 0x00160004,
0x00C30FFF, 0x001E0000,
0x00FFFFFF, 0x00060006,
0x00D75FFF, 0x001E0000,
0x00FFFFFF, 0x00040006 /* HDMI parameters */
};
drm/i915: enable and disable PIPE_CLK_SEL at the right time Previously we were enabling it at mode_set but never disabling. Let's follow the mode set sequence. Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-10-05 23:05:54 +08:00
static enum port intel_ddi_get_encoder_port(struct intel_encoder *intel_encoder)
{
int type = intel_encoder->type;
if (type == INTEL_OUTPUT_HDMI) {
struct intel_hdmi *intel_hdmi =
enc_to_intel_hdmi(&intel_encoder->base);
return intel_hdmi->ddi_port;
} else if (type == INTEL_OUTPUT_ANALOG) {
return PORT_E;
} else {
DRM_ERROR("Invalid DDI encoder type %d\n", type);
BUG();
}
}
drm/i915: initialize DDI buffer translations DDI is introduced starting with Haswell GPU generation. So to simplify its management in the future, we also add intel_ddi.c to hold all the DDI-related items. Buffer translations for DDI links must be initialized prior to enablement. For FDI and DP, first 9 pairs of values are used to select the connection parameters. HDMI uses the last pair of values and ignores the first 9 pairs. So we program HDMI values in both cases, which allows HDMI to work over both FDI and DP-friendly buffers. Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-05-10 02:37:20 +08:00
/* On Haswell, DDI port buffers must be programmed with correct values
* in advance. The buffer values are different for FDI and DP modes,
* but the HDMI/DVI fields are shared among those. So we program the DDI
* in either FDI or DP modes only, as HDMI connections will work with both
* of those
*/
void intel_prepare_ddi_buffers(struct drm_device *dev, enum port port, bool use_fdi_mode)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 reg;
int i;
const u32 *ddi_translations = ((use_fdi_mode) ?
hsw_ddi_translations_fdi :
hsw_ddi_translations_dp);
DRM_DEBUG_DRIVER("Initializing DDI buffers for port %c in %s mode\n",
port_name(port),
use_fdi_mode ? "FDI" : "DP");
WARN((use_fdi_mode && (port != PORT_E)),
"Programming port %c in FDI mode, this probably will not work.\n",
port_name(port));
for (i=0, reg=DDI_BUF_TRANS(port); i < ARRAY_SIZE(hsw_ddi_translations_fdi); i++) {
I915_WRITE(reg, ddi_translations[i]);
reg += 4;
}
}
/* Program DDI buffers translations for DP. By default, program ports A-D in DP
* mode and port E for FDI.
*/
void intel_prepare_ddi(struct drm_device *dev)
{
int port;
if (IS_HASWELL(dev)) {
for (port = PORT_A; port < PORT_E; port++)
intel_prepare_ddi_buffers(dev, port, false);
/* DDI E is the suggested one to work in FDI mode, so program is as such by
* default. It will have to be re-programmed in case a digital DP output
* will be detected on it
*/
intel_prepare_ddi_buffers(dev, PORT_E, true);
}
}
drm/i915: support DDI training in FDI mode Starting with Haswell, DDI ports can work in FDI mode to support connectivity with the outputs located on the PCH. This commit adds support for such connections in the intel_ddi module, and provides Haswell-specific functionality to make it work. v2: simplify the commit as per Daniel Vetter suggestion. Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-05-10 02:37:21 +08:00
static const long hsw_ddi_buf_ctl_values[] = {
DDI_BUF_EMP_400MV_0DB_HSW,
DDI_BUF_EMP_400MV_3_5DB_HSW,
DDI_BUF_EMP_400MV_6DB_HSW,
DDI_BUF_EMP_400MV_9_5DB_HSW,
DDI_BUF_EMP_600MV_0DB_HSW,
DDI_BUF_EMP_600MV_3_5DB_HSW,
DDI_BUF_EMP_600MV_6DB_HSW,
DDI_BUF_EMP_800MV_0DB_HSW,
DDI_BUF_EMP_800MV_3_5DB_HSW
};
/* Starting with Haswell, different DDI ports can work in FDI mode for
* connection to the PCH-located connectors. For this, it is necessary to train
* both the DDI port and PCH receiver for the desired DDI buffer settings.
*
* The recommended port to work in FDI mode is DDI E, which we use here. Also,
* please note that when FDI mode is active on DDI E, it shares 2 lines with
* DDI A (which is used for eDP)
*/
void hsw_fdi_link_train(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
int pipe = intel_crtc->pipe;
u32 reg, temp, i;
/* Start the training iterating through available voltages and emphasis */
for (i=0; i < ARRAY_SIZE(hsw_ddi_buf_ctl_values); i++) {
/* Configure DP_TP_CTL with auto-training */
I915_WRITE(DP_TP_CTL(PORT_E),
DP_TP_CTL_FDI_AUTOTRAIN |
DP_TP_CTL_ENHANCED_FRAME_ENABLE |
DP_TP_CTL_LINK_TRAIN_PAT1 |
DP_TP_CTL_ENABLE);
/* Configure and enable DDI_BUF_CTL for DDI E with next voltage */
temp = I915_READ(DDI_BUF_CTL(PORT_E));
temp = (temp & ~DDI_BUF_EMP_MASK);
I915_WRITE(DDI_BUF_CTL(PORT_E),
temp |
DDI_BUF_CTL_ENABLE |
DDI_PORT_WIDTH_X2 |
hsw_ddi_buf_ctl_values[i]);
udelay(600);
drm/i915: program FDI_RX TP and FDI delays This is required for a stable FDI connection. v2: fix and simplify the FDI_RX_MISC bits as noticed by Paulo Zanoni. CC: Paulo Zanoni <paulo.r.zanoni@intel.com> Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-07-05 07:15:16 +08:00
/* We need to program FDI_RX_MISC with the default TP1 to TP2
* values before enabling the receiver, and configure the delay
* for the FDI timing generator to 90h. Luckily, all the other
* bits are supposed to be zeroed, so we can write those values
* directly.
*/
I915_WRITE(FDI_RX_MISC(pipe), FDI_RX_TP1_TO_TP2_48 |
FDI_RX_FDI_DELAY_90);
drm/i915: support DDI training in FDI mode Starting with Haswell, DDI ports can work in FDI mode to support connectivity with the outputs located on the PCH. This commit adds support for such connections in the intel_ddi module, and provides Haswell-specific functionality to make it work. v2: simplify the commit as per Daniel Vetter suggestion. Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-05-10 02:37:21 +08:00
/* Enable CPU FDI Receiver with auto-training */
reg = FDI_RX_CTL(pipe);
I915_WRITE(reg,
I915_READ(reg) |
FDI_LINK_TRAIN_AUTO |
FDI_RX_ENABLE |
FDI_LINK_TRAIN_PATTERN_1_CPT |
FDI_RX_ENHANCE_FRAME_ENABLE |
FDI_PORT_WIDTH_2X_LPT |
FDI_RX_PLL_ENABLE);
POSTING_READ(reg);
udelay(100);
temp = I915_READ(DP_TP_STATUS(PORT_E));
if (temp & DP_TP_STATUS_AUTOTRAIN_DONE) {
DRM_DEBUG_DRIVER("BUF_CTL training done on %d step\n", i);
/* Enable normal pixel sending for FDI */
I915_WRITE(DP_TP_CTL(PORT_E),
DP_TP_CTL_FDI_AUTOTRAIN |
DP_TP_CTL_LINK_TRAIN_NORMAL |
DP_TP_CTL_ENHANCED_FRAME_ENABLE |
DP_TP_CTL_ENABLE);
break;
} else {
DRM_ERROR("Error training BUF_CTL %d\n", i);
/* Disable DP_TP_CTL and FDI_RX_CTL) and retry */
I915_WRITE(DP_TP_CTL(PORT_E),
I915_READ(DP_TP_CTL(PORT_E)) &
~DP_TP_CTL_ENABLE);
I915_WRITE(FDI_RX_CTL(pipe),
I915_READ(FDI_RX_CTL(pipe)) &
~FDI_RX_PLL_ENABLE);
continue;
}
}
DRM_DEBUG_KMS("FDI train done.\n");
}
drm/i915: detect digital outputs on Haswell Digital port detection on Haswell is indicated by the presence of a bit in DDI_BUF_CTL for port A, and by a different register for ports B, C and D. So we check for those bits during the initialization time and let the hdmi function know about those. Note that this bit does not indicates whether the output is DP or HDMI. However, the DDI buffers can be programmed in a way that is shared between DP/HDMI and FDI/HDMI except for PORT E. So for now, we detect those digital outputs as being HDMI, but proper DP support is still pending. Note that DDI A can only drive eDP, so we do not handle it here for hdmi initialization. v2: simplify Haswell handling logic v3: use generic function for handling digital outputs. Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-05-10 02:37:27 +08:00
/* For DDI connections, it is possible to support different outputs over the
* same DDI port, such as HDMI or DP or even VGA via FDI. So we don't know by
* the time the output is detected what exactly is on the other end of it. This
* function aims at providing support for this detection and proper output
* configuration.
*/
void intel_ddi_init(struct drm_device *dev, enum port port)
{
/* For now, we don't do any proper output detection and assume that we
* handle HDMI only */
switch(port){
case PORT_A:
/* We don't handle eDP and DP yet */
DRM_DEBUG_DRIVER("Found digital output on DDI port A\n");
break;
/* Assume that the ports B, C and D are working in HDMI mode for now */
case PORT_B:
case PORT_C:
case PORT_D:
drm/i915: add port parameter to intel_hdmi_init Instead of having a giant if cascade to figure this out according to the passed-in register. We could do quite a bit more cleaning up and all by using the port at more places, but I think this should be part of a bigger rework to introduce a struct intel_digital_port which would keep track of all these things. I guess this will be part of some haswell-DP-induced refactoring. For now this rips out the big cascade, which is what annoyed me so much. v2: Add port variable name back for the func decl (I've tried to trick myself below the 80 char limit). Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-07-13 02:19:59 +08:00
intel_hdmi_init(dev, DDI_BUF_CTL(port), port);
drm/i915: detect digital outputs on Haswell Digital port detection on Haswell is indicated by the presence of a bit in DDI_BUF_CTL for port A, and by a different register for ports B, C and D. So we check for those bits during the initialization time and let the hdmi function know about those. Note that this bit does not indicates whether the output is DP or HDMI. However, the DDI buffers can be programmed in a way that is shared between DP/HDMI and FDI/HDMI except for PORT E. So for now, we detect those digital outputs as being HDMI, but proper DP support is still pending. Note that DDI A can only drive eDP, so we do not handle it here for hdmi initialization. v2: simplify Haswell handling logic v3: use generic function for handling digital outputs. Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-05-10 02:37:27 +08:00
break;
default:
DRM_DEBUG_DRIVER("No handlers defined for port %d, skipping DDI initialization\n",
port);
break;
}
}
drm/i915: add WR PLL programming table This table is used for programming WR PLL clocks, used by HDMI and DVI outputs. I split it into a separate patch to simplify the HDMI enabling patch which was getting huge. Note that this table is a temporary solution for WR PLL programming. It will be reworked into a more exact algorithm at a later stage. But for now, it provides the most accurate clock setting solution, so we use it here. Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-05-10 02:37:29 +08:00
/* WRPLL clock dividers */
struct wrpll_tmds_clock {
u32 clock;
u16 p; /* Post divider */
u16 n2; /* Feedback divider */
u16 r2; /* Reference divider */
};
drm/i915: try harder to find WR PLL clock settings If we don't find the exact refresh rate, go with the next one. This makes some modes work for me. They won't have the best settings, but will at least have something. Just returning from this function when we don't find the perfect settings does not help us at all. Version 2: - Remove duplicate lines on the clock table. - Add back debug message with refresh, p, n2 and r2. Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Reviewed-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-08-10 21:03:03 +08:00
/* Table of matching values for WRPLL clocks programming for each frequency.
* The code assumes this table is sorted. */
drm/i915: add WR PLL programming table This table is used for programming WR PLL clocks, used by HDMI and DVI outputs. I split it into a separate patch to simplify the HDMI enabling patch which was getting huge. Note that this table is a temporary solution for WR PLL programming. It will be reworked into a more exact algorithm at a later stage. But for now, it provides the most accurate clock setting solution, so we use it here. Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-05-10 02:37:29 +08:00
static const struct wrpll_tmds_clock wrpll_tmds_clock_table[] = {
{19750, 38, 25, 18},
{20000, 48, 32, 18},
{21000, 36, 21, 15},
{21912, 42, 29, 17},
{22000, 36, 22, 15},
{23000, 36, 23, 15},
{23500, 40, 40, 23},
{23750, 26, 16, 14},
{24000, 36, 24, 15},
{25000, 36, 25, 15},
{25175, 26, 40, 33},
{25200, 30, 21, 15},
{26000, 36, 26, 15},
{27000, 30, 21, 14},
{27027, 18, 100, 111},
{27500, 30, 29, 19},
{28000, 34, 30, 17},
{28320, 26, 30, 22},
{28322, 32, 42, 25},
{28750, 24, 23, 18},
{29000, 30, 29, 18},
{29750, 32, 30, 17},
{30000, 30, 25, 15},
{30750, 30, 41, 24},
{31000, 30, 31, 18},
{31500, 30, 28, 16},
{32000, 30, 32, 18},
{32500, 28, 32, 19},
{33000, 24, 22, 15},
{34000, 28, 30, 17},
{35000, 26, 32, 19},
{35500, 24, 30, 19},
{36000, 26, 26, 15},
{36750, 26, 46, 26},
{37000, 24, 23, 14},
{37762, 22, 40, 26},
{37800, 20, 21, 15},
{38000, 24, 27, 16},
{38250, 24, 34, 20},
{39000, 24, 26, 15},
{40000, 24, 32, 18},
{40500, 20, 21, 14},
{40541, 22, 147, 89},
{40750, 18, 19, 14},
{41000, 16, 17, 14},
{41500, 22, 44, 26},
{41540, 22, 44, 26},
{42000, 18, 21, 15},
{42500, 22, 45, 26},
{43000, 20, 43, 27},
{43163, 20, 24, 15},
{44000, 18, 22, 15},
{44900, 20, 108, 65},
{45000, 20, 25, 15},
{45250, 20, 52, 31},
{46000, 18, 23, 15},
{46750, 20, 45, 26},
{47000, 20, 40, 23},
{48000, 18, 24, 15},
{49000, 18, 49, 30},
{49500, 16, 22, 15},
{50000, 18, 25, 15},
{50500, 18, 32, 19},
{51000, 18, 34, 20},
{52000, 18, 26, 15},
{52406, 14, 34, 25},
{53000, 16, 22, 14},
{54000, 16, 24, 15},
{54054, 16, 173, 108},
{54500, 14, 24, 17},
{55000, 12, 22, 18},
{56000, 14, 45, 31},
{56250, 16, 25, 15},
{56750, 14, 25, 17},
{57000, 16, 27, 16},
{58000, 16, 43, 25},
{58250, 16, 38, 22},
{58750, 16, 40, 23},
{59000, 14, 26, 17},
{59341, 14, 40, 26},
{59400, 16, 44, 25},
{60000, 16, 32, 18},
{60500, 12, 39, 29},
{61000, 14, 49, 31},
{62000, 14, 37, 23},
{62250, 14, 42, 26},
{63000, 12, 21, 15},
{63500, 14, 28, 17},
{64000, 12, 27, 19},
{65000, 14, 32, 19},
{65250, 12, 29, 20},
{65500, 12, 32, 22},
{66000, 12, 22, 15},
{66667, 14, 38, 22},
{66750, 10, 21, 17},
{67000, 14, 33, 19},
{67750, 14, 58, 33},
{68000, 14, 30, 17},
{68179, 14, 46, 26},
{68250, 14, 46, 26},
{69000, 12, 23, 15},
{70000, 12, 28, 18},
{71000, 12, 30, 19},
{72000, 12, 24, 15},
{73000, 10, 23, 17},
{74000, 12, 23, 14},
{74176, 8, 100, 91},
{74250, 10, 22, 16},
{74481, 12, 43, 26},
{74500, 10, 29, 21},
{75000, 12, 25, 15},
{75250, 10, 39, 28},
{76000, 12, 27, 16},
{77000, 12, 53, 31},
{78000, 12, 26, 15},
{78750, 12, 28, 16},
{79000, 10, 38, 26},
{79500, 10, 28, 19},
{80000, 12, 32, 18},
{81000, 10, 21, 14},
{81081, 6, 100, 111},
{81624, 8, 29, 24},
{82000, 8, 17, 14},
{83000, 10, 40, 26},
{83950, 10, 28, 18},
{84000, 10, 28, 18},
{84750, 6, 16, 17},
{85000, 6, 17, 18},
{85250, 10, 30, 19},
{85750, 10, 27, 17},
{86000, 10, 43, 27},
{87000, 10, 29, 18},
{88000, 10, 44, 27},
{88500, 10, 41, 25},
{89000, 10, 28, 17},
{89012, 6, 90, 91},
{89100, 10, 33, 20},
{90000, 10, 25, 15},
{91000, 10, 32, 19},
{92000, 10, 46, 27},
{93000, 10, 31, 18},
{94000, 10, 40, 23},
{94500, 10, 28, 16},
{95000, 10, 44, 25},
{95654, 10, 39, 22},
{95750, 10, 39, 22},
{96000, 10, 32, 18},
{97000, 8, 23, 16},
{97750, 8, 42, 29},
{98000, 8, 45, 31},
{99000, 8, 22, 15},
{99750, 8, 34, 23},
{100000, 6, 20, 18},
{100500, 6, 19, 17},
{101000, 6, 37, 33},
{101250, 8, 21, 14},
{102000, 6, 17, 15},
{102250, 6, 25, 22},
{103000, 8, 29, 19},
{104000, 8, 37, 24},
{105000, 8, 28, 18},
{106000, 8, 22, 14},
{107000, 8, 46, 29},
{107214, 8, 27, 17},
{108000, 8, 24, 15},
{108108, 8, 173, 108},
{109000, 6, 23, 19},
{110000, 6, 22, 18},
{110013, 6, 22, 18},
{110250, 8, 49, 30},
{110500, 8, 36, 22},
{111000, 8, 23, 14},
{111264, 8, 150, 91},
{111375, 8, 33, 20},
{112000, 8, 63, 38},
{112500, 8, 25, 15},
{113100, 8, 57, 34},
{113309, 8, 42, 25},
{114000, 8, 27, 16},
{115000, 6, 23, 18},
{116000, 8, 43, 25},
{117000, 8, 26, 15},
{117500, 8, 40, 23},
{118000, 6, 38, 29},
{119000, 8, 30, 17},
{119500, 8, 46, 26},
{119651, 8, 39, 22},
{120000, 8, 32, 18},
{121000, 6, 39, 29},
{121250, 6, 31, 23},
{121750, 6, 23, 17},
{122000, 6, 42, 31},
{122614, 6, 30, 22},
{123000, 6, 41, 30},
{123379, 6, 37, 27},
{124000, 6, 51, 37},
{125000, 6, 25, 18},
{125250, 4, 13, 14},
{125750, 4, 27, 29},
{126000, 6, 21, 15},
{127000, 6, 24, 17},
{127250, 6, 41, 29},
{128000, 6, 27, 19},
{129000, 6, 43, 30},
{129859, 4, 25, 26},
{130000, 6, 26, 18},
{130250, 6, 42, 29},
{131000, 6, 32, 22},
{131500, 6, 38, 26},
{131850, 6, 41, 28},
{132000, 6, 22, 15},
{132750, 6, 28, 19},
{133000, 6, 34, 23},
{133330, 6, 37, 25},
{134000, 6, 61, 41},
{135000, 6, 21, 14},
{135250, 6, 167, 111},
{136000, 6, 62, 41},
{137000, 6, 35, 23},
{138000, 6, 23, 15},
{138500, 6, 40, 26},
{138750, 6, 37, 24},
{139000, 6, 34, 22},
{139050, 6, 34, 22},
{139054, 6, 34, 22},
{140000, 6, 28, 18},
{141000, 6, 36, 23},
{141500, 6, 22, 14},
{142000, 6, 30, 19},
{143000, 6, 27, 17},
{143472, 4, 17, 16},
{144000, 6, 24, 15},
{145000, 6, 29, 18},
{146000, 6, 47, 29},
{146250, 6, 26, 16},
{147000, 6, 49, 30},
{147891, 6, 23, 14},
{148000, 6, 23, 14},
{148250, 6, 28, 17},
{148352, 4, 100, 91},
{148500, 6, 33, 20},
{149000, 6, 48, 29},
{150000, 6, 25, 15},
{151000, 4, 19, 17},
{152000, 6, 27, 16},
{152280, 6, 44, 26},
{153000, 6, 34, 20},
{154000, 6, 53, 31},
{155000, 6, 31, 18},
{155250, 6, 50, 29},
{155750, 6, 45, 26},
{156000, 6, 26, 15},
{157000, 6, 61, 35},
{157500, 6, 28, 16},
{158000, 6, 65, 37},
{158250, 6, 44, 25},
{159000, 6, 53, 30},
{159500, 6, 39, 22},
{160000, 6, 32, 18},
{161000, 4, 31, 26},
{162000, 4, 18, 15},
{162162, 4, 131, 109},
{162500, 4, 53, 44},
{163000, 4, 29, 24},
{164000, 4, 17, 14},
{165000, 4, 22, 18},
{166000, 4, 32, 26},
{167000, 4, 26, 21},
{168000, 4, 46, 37},
{169000, 4, 104, 83},
{169128, 4, 64, 51},
{169500, 4, 39, 31},
{170000, 4, 34, 27},
{171000, 4, 19, 15},
{172000, 4, 51, 40},
{172750, 4, 32, 25},
{172800, 4, 32, 25},
{173000, 4, 41, 32},
{174000, 4, 49, 38},
{174787, 4, 22, 17},
{175000, 4, 35, 27},
{176000, 4, 30, 23},
{177000, 4, 38, 29},
{178000, 4, 29, 22},
{178500, 4, 37, 28},
{179000, 4, 53, 40},
{179500, 4, 73, 55},
{180000, 4, 20, 15},
{181000, 4, 55, 41},
{182000, 4, 31, 23},
{183000, 4, 42, 31},
{184000, 4, 30, 22},
{184750, 4, 26, 19},
{185000, 4, 37, 27},
{186000, 4, 51, 37},
{187000, 4, 36, 26},
{188000, 4, 32, 23},
{189000, 4, 21, 15},
{190000, 4, 38, 27},
{190960, 4, 41, 29},
{191000, 4, 41, 29},
{192000, 4, 27, 19},
{192250, 4, 37, 26},
{193000, 4, 20, 14},
{193250, 4, 53, 37},
{194000, 4, 23, 16},
{194208, 4, 23, 16},
{195000, 4, 26, 18},
{196000, 4, 45, 31},
{197000, 4, 35, 24},
{197750, 4, 41, 28},
{198000, 4, 22, 15},
{198500, 4, 25, 17},
{199000, 4, 28, 19},
{200000, 4, 37, 25},
{201000, 4, 61, 41},
{202000, 4, 112, 75},
{202500, 4, 21, 14},
{203000, 4, 146, 97},
{204000, 4, 62, 41},
{204750, 4, 44, 29},
{205000, 4, 38, 25},
{206000, 4, 29, 19},
{207000, 4, 23, 15},
{207500, 4, 40, 26},
{208000, 4, 37, 24},
{208900, 4, 48, 31},
{209000, 4, 48, 31},
{209250, 4, 31, 20},
{210000, 4, 28, 18},
{211000, 4, 25, 16},
{212000, 4, 22, 14},
{213000, 4, 30, 19},
{213750, 4, 38, 24},
{214000, 4, 46, 29},
{214750, 4, 35, 22},
{215000, 4, 43, 27},
{216000, 4, 24, 15},
{217000, 4, 37, 23},
{218000, 4, 42, 26},
{218250, 4, 42, 26},
{218750, 4, 34, 21},
{219000, 4, 47, 29},
{220000, 4, 44, 27},
{220640, 4, 49, 30},
{220750, 4, 36, 22},
{221000, 4, 36, 22},
{222000, 4, 23, 14},
{222525, 4, 28, 17},
{222750, 4, 33, 20},
{227000, 4, 37, 22},
{230250, 4, 29, 17},
{233500, 4, 38, 22},
{235000, 4, 40, 23},
{238000, 4, 30, 17},
{241500, 2, 17, 19},
{245250, 2, 20, 22},
{247750, 2, 22, 24},
{253250, 2, 15, 16},
{256250, 2, 18, 19},
{262500, 2, 31, 32},
{267250, 2, 66, 67},
{268500, 2, 94, 95},
{270000, 2, 14, 14},
{272500, 2, 77, 76},
{273750, 2, 57, 56},
{280750, 2, 24, 23},
{281250, 2, 23, 22},
{286000, 2, 17, 16},
{291750, 2, 26, 24},
{296703, 2, 56, 51},
{297000, 2, 22, 20},
{298000, 2, 21, 19},
};
drm/i915: prepare HDMI link for Haswell On Haswell, we need to properly train the DDI buffers prior to enabling HDMI, and enable the required clocks with correct dividers for the desired frequency. Also, we cannot simple reuse HDMI routines from previous generations of GPU, as most of HDMI-specific stuff is being done via the DDI port programming instead of HDMI-specific registers. This commit take advantage of the WR PLL clock table which is in a separate (previous) commit to select the right divisors for each mode. Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-05-10 02:37:31 +08:00
void intel_ddi_mode_set(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
struct drm_crtc *crtc = encoder->crtc;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
int port = intel_hdmi->ddi_port;
int pipe = intel_crtc->pipe;
/* On Haswell, we need to enable the clocks and prepare DDI function to
* work in HDMI mode for this pipe.
*/
DRM_DEBUG_KMS("Preparing HDMI DDI mode for Haswell on port %c, pipe %c\n", port_name(port), pipe_name(pipe));
if (intel_hdmi->has_audio) {
/* Proper support for digital audio needs a new logic and a new set
* of registers, so we leave it for future patch bombing.
*/
drm/i915: write eld info for HDMI audio HDMI audio related registers will be configured in write_eld callback. Signed-off-by: Wang Xingchao <xingchao.wang@intel.com> Reviewed-by: Imre Deak <imre.deak@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-08-09 16:52:16 +08:00
DRM_DEBUG_DRIVER("HDMI audio on pipe %c on DDI\n",
drm/i915: prepare HDMI link for Haswell On Haswell, we need to properly train the DDI buffers prior to enabling HDMI, and enable the required clocks with correct dividers for the desired frequency. Also, we cannot simple reuse HDMI routines from previous generations of GPU, as most of HDMI-specific stuff is being done via the DDI port programming instead of HDMI-specific registers. This commit take advantage of the WR PLL clock table which is in a separate (previous) commit to select the right divisors for each mode. Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-05-10 02:37:31 +08:00
pipe_name(intel_crtc->pipe));
drm/i915: write eld info for HDMI audio HDMI audio related registers will be configured in write_eld callback. Signed-off-by: Wang Xingchao <xingchao.wang@intel.com> Reviewed-by: Imre Deak <imre.deak@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-08-09 16:52:16 +08:00
/* write eld */
DRM_DEBUG_DRIVER("HDMI audio: write eld information\n");
intel_write_eld(encoder, adjusted_mode);
drm/i915: prepare HDMI link for Haswell On Haswell, we need to properly train the DDI buffers prior to enabling HDMI, and enable the required clocks with correct dividers for the desired frequency. Also, we cannot simple reuse HDMI routines from previous generations of GPU, as most of HDMI-specific stuff is being done via the DDI port programming instead of HDMI-specific registers. This commit take advantage of the WR PLL clock table which is in a separate (previous) commit to select the right divisors for each mode. Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-05-10 02:37:31 +08:00
}
drm/i915: enable and disable DDI_FUNC_CTL at the right time And the right time is exactly after/before changing PIPE_CONF. See the documentation about the mode set sequence. This code is not inside any encoder-specific callback because DDI_FUNC_CTL is part of the pipe, so it is used by all encoders. Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-10-05 23:05:53 +08:00
intel_hdmi->set_infoframes(encoder, adjusted_mode);
}
static struct intel_encoder *
intel_ddi_get_crtc_encoder(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
struct intel_encoder *intel_encoder, *ret = NULL;
int num_encoders = 0;
for_each_encoder_on_crtc(dev, crtc, intel_encoder) {
ret = intel_encoder;
num_encoders++;
}
if (num_encoders != 1)
WARN(1, "%d encoders on crtc for pipe %d\n", num_encoders,
intel_crtc->pipe);
BUG_ON(ret == NULL);
return ret;
}
drm/i915: completely rewrite the Haswell PLL handling code Problems with the previous code: - HDMI just uses WRPLL1 for everything, so dual head cases might not work sometimes. - At encoder->mode_set we just write the PLL register without doing any kind of check (e.g., check if the PLL is already being used). - There is no way to fail and return error codes at encoder->mode_set. - We write to PORT_CLK_SEL at mode_set and we never disable it. - Machines hang due to wrong clock enable/disable sequence. So here we rewrite the code, making it a little more like the pre-Haswell PLL mode set code: - Check PLL availability at ironlake_crtc_mode_set. - Try to use both WRPLLs. - Check if PLLs are used before actually trying to use them, and properly fail with error messages. - Enable/disable PORT_CLK_SEL at the right place. - Add some WARNs to check for bugs. The next improvement will be to try to reuse PLLs if the timings match, but this is content for another patch and it's already documented with a TODO comment. Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-10-05 23:05:58 +08:00
void intel_ddi_put_crtc_pll(struct drm_crtc *crtc)
{
struct drm_i915_private *dev_priv = crtc->dev->dev_private;
struct intel_ddi_plls *plls = &dev_priv->ddi_plls;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
uint32_t val;
switch (intel_crtc->ddi_pll_sel) {
case PORT_CLK_SEL_SPLL:
plls->spll_refcount--;
if (plls->spll_refcount == 0) {
DRM_DEBUG_KMS("Disabling SPLL\n");
val = I915_READ(SPLL_CTL);
WARN_ON(!(val & SPLL_PLL_ENABLE));
I915_WRITE(SPLL_CTL, val & ~SPLL_PLL_ENABLE);
POSTING_READ(SPLL_CTL);
}
break;
case PORT_CLK_SEL_WRPLL1:
plls->wrpll1_refcount--;
if (plls->wrpll1_refcount == 0) {
DRM_DEBUG_KMS("Disabling WRPLL 1\n");
val = I915_READ(WRPLL_CTL1);
WARN_ON(!(val & WRPLL_PLL_ENABLE));
I915_WRITE(WRPLL_CTL1, val & ~WRPLL_PLL_ENABLE);
POSTING_READ(WRPLL_CTL1);
}
break;
case PORT_CLK_SEL_WRPLL2:
plls->wrpll2_refcount--;
if (plls->wrpll2_refcount == 0) {
DRM_DEBUG_KMS("Disabling WRPLL 2\n");
val = I915_READ(WRPLL_CTL2);
WARN_ON(!(val & WRPLL_PLL_ENABLE));
I915_WRITE(WRPLL_CTL2, val & ~WRPLL_PLL_ENABLE);
POSTING_READ(WRPLL_CTL2);
}
break;
}
WARN(plls->spll_refcount < 0, "Invalid SPLL refcount\n");
WARN(plls->wrpll1_refcount < 0, "Invalid WRPLL1 refcount\n");
WARN(plls->wrpll2_refcount < 0, "Invalid WRPLL2 refcount\n");
intel_crtc->ddi_pll_sel = PORT_CLK_SEL_NONE;
}
static void intel_ddi_calculate_wrpll(int clock, int *p, int *n2, int *r2)
{
u32 i;
for (i = 0; i < ARRAY_SIZE(wrpll_tmds_clock_table); i++)
if (clock <= wrpll_tmds_clock_table[i].clock)
break;
if (i == ARRAY_SIZE(wrpll_tmds_clock_table))
i--;
*p = wrpll_tmds_clock_table[i].p;
*n2 = wrpll_tmds_clock_table[i].n2;
*r2 = wrpll_tmds_clock_table[i].r2;
if (wrpll_tmds_clock_table[i].clock != clock)
DRM_INFO("WRPLL: using settings for %dKHz on %dKHz mode\n",
wrpll_tmds_clock_table[i].clock, clock);
DRM_DEBUG_KMS("WRPLL: %dKHz refresh rate with p=%d, n2=%d r2=%d\n",
clock, *p, *n2, *r2);
}
bool intel_ddi_pll_mode_set(struct drm_crtc *crtc, int clock)
{
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
struct intel_encoder *intel_encoder = intel_ddi_get_crtc_encoder(crtc);
struct drm_i915_private *dev_priv = crtc->dev->dev_private;
struct intel_ddi_plls *plls = &dev_priv->ddi_plls;
int type = intel_encoder->type;
enum pipe pipe = intel_crtc->pipe;
uint32_t reg, val;
/* TODO: reuse PLLs when possible (compare values) */
intel_ddi_put_crtc_pll(crtc);
if (type == INTEL_OUTPUT_HDMI) {
int p, n2, r2;
if (plls->wrpll1_refcount == 0) {
DRM_DEBUG_KMS("Using WRPLL 1 on pipe %c\n",
pipe_name(pipe));
plls->wrpll1_refcount++;
reg = WRPLL_CTL1;
intel_crtc->ddi_pll_sel = PORT_CLK_SEL_WRPLL1;
} else if (plls->wrpll2_refcount == 0) {
DRM_DEBUG_KMS("Using WRPLL 2 on pipe %c\n",
pipe_name(pipe));
plls->wrpll2_refcount++;
reg = WRPLL_CTL2;
intel_crtc->ddi_pll_sel = PORT_CLK_SEL_WRPLL2;
} else {
DRM_ERROR("No WRPLLs available!\n");
return false;
}
WARN(I915_READ(reg) & WRPLL_PLL_ENABLE,
"WRPLL already enabled\n");
intel_ddi_calculate_wrpll(clock, &p, &n2, &r2);
val = WRPLL_PLL_ENABLE | WRPLL_PLL_SELECT_LCPLL_2700 |
WRPLL_DIVIDER_REFERENCE(r2) | WRPLL_DIVIDER_FEEDBACK(n2) |
WRPLL_DIVIDER_POST(p);
} else if (type == INTEL_OUTPUT_ANALOG) {
if (plls->spll_refcount == 0) {
DRM_DEBUG_KMS("Using SPLL on pipe %c\n",
pipe_name(pipe));
plls->spll_refcount++;
reg = SPLL_CTL;
intel_crtc->ddi_pll_sel = PORT_CLK_SEL_SPLL;
}
WARN(I915_READ(reg) & SPLL_PLL_ENABLE,
"SPLL already enabled\n");
val = SPLL_PLL_ENABLE | SPLL_PLL_FREQ_1350MHz | SPLL_PLL_SCC;
} else {
WARN(1, "Invalid DDI encoder type %d\n", type);
return false;
}
I915_WRITE(reg, val);
udelay(20);
return true;
}
drm/i915: enable and disable DDI_FUNC_CTL at the right time And the right time is exactly after/before changing PIPE_CONF. See the documentation about the mode set sequence. This code is not inside any encoder-specific callback because DDI_FUNC_CTL is part of the pipe, so it is used by all encoders. Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-10-05 23:05:53 +08:00
void intel_ddi_enable_pipe_func(struct drm_crtc *crtc)
{
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
struct intel_encoder *intel_encoder = intel_ddi_get_crtc_encoder(crtc);
struct drm_i915_private *dev_priv = crtc->dev->dev_private;
enum pipe pipe = intel_crtc->pipe;
uint32_t temp;
drm/i915: prepare HDMI link for Haswell On Haswell, we need to properly train the DDI buffers prior to enabling HDMI, and enable the required clocks with correct dividers for the desired frequency. Also, we cannot simple reuse HDMI routines from previous generations of GPU, as most of HDMI-specific stuff is being done via the DDI port programming instead of HDMI-specific registers. This commit take advantage of the WR PLL clock table which is in a separate (previous) commit to select the right divisors for each mode. Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-05-10 02:37:31 +08:00
/* Enable PIPE_DDI_FUNC_CTL for the pipe to work in HDMI mode */
drm/i915: enable and disable DDI_FUNC_CTL at the right time And the right time is exactly after/before changing PIPE_CONF. See the documentation about the mode set sequence. This code is not inside any encoder-specific callback because DDI_FUNC_CTL is part of the pipe, so it is used by all encoders. Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-10-05 23:05:53 +08:00
temp = PIPE_DDI_FUNC_ENABLE;
drm/i915: correctly set the DDI_FUNC_CTL bpc field Correctly erase the values previously set and also check for 6bpc and 10bpc. Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Reviewed-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-08-09 01:15:29 +08:00
switch (intel_crtc->bpp) {
case 18:
temp |= PIPE_DDI_BPC_6;
break;
case 24:
temp |= PIPE_DDI_BPC_8;
break;
case 30:
temp |= PIPE_DDI_BPC_10;
break;
case 36:
temp |= PIPE_DDI_BPC_12;
break;
default:
WARN(1, "%d bpp unsupported by pipe DDI function\n",
intel_crtc->bpp);
}
drm/i915: prepare HDMI link for Haswell On Haswell, we need to properly train the DDI buffers prior to enabling HDMI, and enable the required clocks with correct dividers for the desired frequency. Also, we cannot simple reuse HDMI routines from previous generations of GPU, as most of HDMI-specific stuff is being done via the DDI port programming instead of HDMI-specific registers. This commit take advantage of the WR PLL clock table which is in a separate (previous) commit to select the right divisors for each mode. Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-05-10 02:37:31 +08:00
drm/i915: enable and disable DDI_FUNC_CTL at the right time And the right time is exactly after/before changing PIPE_CONF. See the documentation about the mode set sequence. This code is not inside any encoder-specific callback because DDI_FUNC_CTL is part of the pipe, so it is used by all encoders. Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-10-05 23:05:53 +08:00
if (crtc->mode.flags & DRM_MODE_FLAG_PVSYNC)
drm/i915: set the DDI sync polarity bits During my tests, everything worked even if the wrong polarity was set. Still, we should try to set the correct values. Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Reviewed-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-08-09 01:15:28 +08:00
temp |= PIPE_DDI_PVSYNC;
drm/i915: enable and disable DDI_FUNC_CTL at the right time And the right time is exactly after/before changing PIPE_CONF. See the documentation about the mode set sequence. This code is not inside any encoder-specific callback because DDI_FUNC_CTL is part of the pipe, so it is used by all encoders. Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-10-05 23:05:53 +08:00
if (crtc->mode.flags & DRM_MODE_FLAG_PHSYNC)
drm/i915: set the DDI sync polarity bits During my tests, everything worked even if the wrong polarity was set. Still, we should try to set the correct values. Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Reviewed-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-08-09 01:15:28 +08:00
temp |= PIPE_DDI_PHSYNC;
drm/i915: enable and disable DDI_FUNC_CTL at the right time And the right time is exactly after/before changing PIPE_CONF. See the documentation about the mode set sequence. This code is not inside any encoder-specific callback because DDI_FUNC_CTL is part of the pipe, so it is used by all encoders. Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-10-05 23:05:53 +08:00
if (intel_encoder->type == INTEL_OUTPUT_HDMI) {
struct intel_hdmi *intel_hdmi =
enc_to_intel_hdmi(&intel_encoder->base);
if (intel_hdmi->has_hdmi_sink)
temp |= PIPE_DDI_MODE_SELECT_HDMI;
else
temp |= PIPE_DDI_MODE_SELECT_DVI;
temp |= PIPE_DDI_SELECT_PORT(intel_hdmi->ddi_port);
} else if (intel_encoder->type == INTEL_OUTPUT_ANALOG) {
temp |= PIPE_DDI_MODE_SELECT_FDI;
temp |= PIPE_DDI_SELECT_PORT(PORT_E);
} else {
WARN(1, "Invalid encoder type %d for pipe %d\n",
intel_encoder->type, pipe);
}
drm/i915: prepare HDMI link for Haswell On Haswell, we need to properly train the DDI buffers prior to enabling HDMI, and enable the required clocks with correct dividers for the desired frequency. Also, we cannot simple reuse HDMI routines from previous generations of GPU, as most of HDMI-specific stuff is being done via the DDI port programming instead of HDMI-specific registers. This commit take advantage of the WR PLL clock table which is in a separate (previous) commit to select the right divisors for each mode. Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-05-10 02:37:31 +08:00
I915_WRITE(DDI_FUNC_CTL(pipe), temp);
drm/i915: enable and disable DDI_FUNC_CTL at the right time And the right time is exactly after/before changing PIPE_CONF. See the documentation about the mode set sequence. This code is not inside any encoder-specific callback because DDI_FUNC_CTL is part of the pipe, so it is used by all encoders. Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-10-05 23:05:53 +08:00
}
drm/i915: prepare HDMI link for Haswell On Haswell, we need to properly train the DDI buffers prior to enabling HDMI, and enable the required clocks with correct dividers for the desired frequency. Also, we cannot simple reuse HDMI routines from previous generations of GPU, as most of HDMI-specific stuff is being done via the DDI port programming instead of HDMI-specific registers. This commit take advantage of the WR PLL clock table which is in a separate (previous) commit to select the right divisors for each mode. Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-05-10 02:37:31 +08:00
drm/i915: enable and disable DDI_FUNC_CTL at the right time And the right time is exactly after/before changing PIPE_CONF. See the documentation about the mode set sequence. This code is not inside any encoder-specific callback because DDI_FUNC_CTL is part of the pipe, so it is used by all encoders. Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-10-05 23:05:53 +08:00
void intel_ddi_disable_pipe_func(struct drm_i915_private *dev_priv,
enum pipe pipe)
{
uint32_t reg = DDI_FUNC_CTL(pipe);
uint32_t val = I915_READ(reg);
val &= ~(PIPE_DDI_FUNC_ENABLE | PIPE_DDI_PORT_MASK);
val |= PIPE_DDI_PORT_NONE;
I915_WRITE(reg, val);
drm/i915: prepare HDMI link for Haswell On Haswell, we need to properly train the DDI buffers prior to enabling HDMI, and enable the required clocks with correct dividers for the desired frequency. Also, we cannot simple reuse HDMI routines from previous generations of GPU, as most of HDMI-specific stuff is being done via the DDI port programming instead of HDMI-specific registers. This commit take advantage of the WR PLL clock table which is in a separate (previous) commit to select the right divisors for each mode. Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-05-10 02:37:31 +08:00
}
drm/i915/hdmi: implement get_hw_state Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-07-02 19:27:29 +08:00
bool intel_ddi_get_hw_state(struct intel_encoder *encoder,
enum pipe *pipe)
{
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base);
u32 tmp;
int i;
tmp = I915_READ(DDI_BUF_CTL(intel_hdmi->ddi_port));
if (!(tmp & DDI_BUF_CTL_ENABLE))
return false;
for_each_pipe(i) {
tmp = I915_READ(DDI_FUNC_CTL(i));
if ((tmp & PIPE_DDI_PORT_MASK)
== PIPE_DDI_SELECT_PORT(intel_hdmi->ddi_port)) {
*pipe = i;
return true;
}
}
DRM_DEBUG_KMS("No pipe for ddi port %i found\n", intel_hdmi->ddi_port);
return true;
}
drm/i915: completely rewrite the Haswell PLL handling code Problems with the previous code: - HDMI just uses WRPLL1 for everything, so dual head cases might not work sometimes. - At encoder->mode_set we just write the PLL register without doing any kind of check (e.g., check if the PLL is already being used). - There is no way to fail and return error codes at encoder->mode_set. - We write to PORT_CLK_SEL at mode_set and we never disable it. - Machines hang due to wrong clock enable/disable sequence. So here we rewrite the code, making it a little more like the pre-Haswell PLL mode set code: - Check PLL availability at ironlake_crtc_mode_set. - Try to use both WRPLLs. - Check if PLLs are used before actually trying to use them, and properly fail with error messages. - Enable/disable PORT_CLK_SEL at the right place. - Add some WARNs to check for bugs. The next improvement will be to try to reuse PLLs if the timings match, but this is content for another patch and it's already documented with a TODO comment. Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-10-05 23:05:58 +08:00
static uint32_t intel_ddi_get_crtc_pll(struct drm_i915_private *dev_priv,
enum pipe pipe)
{
uint32_t temp, ret;
enum port port;
int i;
temp = I915_READ(DDI_FUNC_CTL(pipe));
temp &= PIPE_DDI_PORT_MASK;
for (i = PORT_A; i <= PORT_E; i++)
if (temp == PIPE_DDI_SELECT_PORT(i))
port = i;
ret = I915_READ(PORT_CLK_SEL(port));
DRM_DEBUG_KMS("Pipe %c connected to port %c using clock 0x%08x\n",
pipe_name(pipe), port_name(port), ret);
return ret;
}
void intel_ddi_setup_hw_pll_state(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
enum pipe pipe;
struct intel_crtc *intel_crtc;
for_each_pipe(pipe) {
intel_crtc =
to_intel_crtc(dev_priv->pipe_to_crtc_mapping[pipe]);
if (!intel_crtc->active)
continue;
intel_crtc->ddi_pll_sel = intel_ddi_get_crtc_pll(dev_priv,
pipe);
switch (intel_crtc->ddi_pll_sel) {
case PORT_CLK_SEL_SPLL:
dev_priv->ddi_plls.spll_refcount++;
break;
case PORT_CLK_SEL_WRPLL1:
dev_priv->ddi_plls.wrpll1_refcount++;
break;
case PORT_CLK_SEL_WRPLL2:
dev_priv->ddi_plls.wrpll2_refcount++;
break;
}
}
}
drm/i915: enable and disable PIPE_CLK_SEL at the right time Previously we were enabling it at mode_set but never disabling. Let's follow the mode set sequence. Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-10-05 23:05:54 +08:00
void intel_ddi_enable_pipe_clock(struct intel_crtc *intel_crtc)
{
struct drm_crtc *crtc = &intel_crtc->base;
struct drm_i915_private *dev_priv = crtc->dev->dev_private;
struct intel_encoder *intel_encoder = intel_ddi_get_crtc_encoder(crtc);
enum port port = intel_ddi_get_encoder_port(intel_encoder);
I915_WRITE(PIPE_CLK_SEL(intel_crtc->pipe), PIPE_CLK_SEL_PORT(port));
}
void intel_ddi_disable_pipe_clock(struct intel_crtc *intel_crtc)
{
struct drm_i915_private *dev_priv = intel_crtc->base.dev->dev_private;
I915_WRITE(PIPE_CLK_SEL(intel_crtc->pipe), PIPE_CLK_SEL_DISABLED);
}
drm/i915: completely rewrite the Haswell PLL handling code Problems with the previous code: - HDMI just uses WRPLL1 for everything, so dual head cases might not work sometimes. - At encoder->mode_set we just write the PLL register without doing any kind of check (e.g., check if the PLL is already being used). - There is no way to fail and return error codes at encoder->mode_set. - We write to PORT_CLK_SEL at mode_set and we never disable it. - Machines hang due to wrong clock enable/disable sequence. So here we rewrite the code, making it a little more like the pre-Haswell PLL mode set code: - Check PLL availability at ironlake_crtc_mode_set. - Try to use both WRPLLs. - Check if PLLs are used before actually trying to use them, and properly fail with error messages. - Enable/disable PORT_CLK_SEL at the right place. - Add some WARNs to check for bugs. The next improvement will be to try to reuse PLLs if the timings match, but this is content for another patch and it's already documented with a TODO comment. Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-10-05 23:05:58 +08:00
void intel_ddi_pre_enable(struct intel_encoder *intel_encoder)
{
struct drm_crtc *crtc = intel_encoder->base.crtc;
struct drm_i915_private *dev_priv = crtc->dev->dev_private;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
enum port port = intel_ddi_get_encoder_port(intel_encoder);
WARN_ON(intel_crtc->ddi_pll_sel == PORT_CLK_SEL_NONE);
I915_WRITE(PORT_CLK_SEL(port), intel_crtc->ddi_pll_sel);
}
void intel_ddi_post_disable(struct intel_encoder *intel_encoder)
{
struct drm_encoder *encoder = &intel_encoder->base;
struct drm_i915_private *dev_priv = encoder->dev->dev_private;
enum port port = intel_ddi_get_encoder_port(intel_encoder);
I915_WRITE(PORT_CLK_SEL(port), PORT_CLK_SEL_NONE);
}
drm/i915/hdmi: convert to encoder->disable/enable I've picked hdmi as the first encoder to convert because it's rather simple: - no cloning possible - no differences between prepare/commit and dpms off/on switching. A few changes are required to do so: - Split up the dpms code into an enable/disable function and wire it up with the intel encoder. - Noop out the existing encoder prepare/commit functions used by the crtc helper - our crtc enable/disable code now calls back into the encoder enable/disable code at the right spot. - Create new helper functions to handle dpms changes. - Add intel_encoder->connectors_active to better track dpms state. Atm this is unused, but it will be useful to correctly disable the entire display pipe for cloned configurations. Also note that for now this is only useful in the dpms code - thanks to the crtc helper's dpms confusion across a modeset operation we can't (yet) rely on this having a sensible value in all circumstances. - Rip out the encoder helper dpms callback, if this is still getting called somewhere we have a bug. The slight issue with that is that the crtc helper abuses dpms off to disable unused functions. Hence we also need to implement a default encoder disable function to do just that with the new encoder->disable callback. - Note that we drop the cpt modeset verification in the commit callback, too. The right place to do this would be in the crtc's enable function, _after_ all the encoders are set up. But because not all encoders are converted yet, we can't do that. Hence disable this check temporarily as a minor concession to bisectability. v2: Squash the dpms mode to only the supported values - connector->dpms is for internal tracking only, we can hence avoid needless state-changes a bit whithout causing harm. v3: Apply bikeshed to disable|enable_ddi, suggested by Paulo Zanoni. Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-06-30 14:59:56 +08:00
void intel_enable_ddi(struct intel_encoder *encoder)
drm/i915: prepare HDMI link for Haswell On Haswell, we need to properly train the DDI buffers prior to enabling HDMI, and enable the required clocks with correct dividers for the desired frequency. Also, we cannot simple reuse HDMI routines from previous generations of GPU, as most of HDMI-specific stuff is being done via the DDI port programming instead of HDMI-specific registers. This commit take advantage of the WR PLL clock table which is in a separate (previous) commit to select the right divisors for each mode. Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-05-10 02:37:31 +08:00
{
drm/i915/hdmi: convert to encoder->disable/enable I've picked hdmi as the first encoder to convert because it's rather simple: - no cloning possible - no differences between prepare/commit and dpms off/on switching. A few changes are required to do so: - Split up the dpms code into an enable/disable function and wire it up with the intel encoder. - Noop out the existing encoder prepare/commit functions used by the crtc helper - our crtc enable/disable code now calls back into the encoder enable/disable code at the right spot. - Create new helper functions to handle dpms changes. - Add intel_encoder->connectors_active to better track dpms state. Atm this is unused, but it will be useful to correctly disable the entire display pipe for cloned configurations. Also note that for now this is only useful in the dpms code - thanks to the crtc helper's dpms confusion across a modeset operation we can't (yet) rely on this having a sensible value in all circumstances. - Rip out the encoder helper dpms callback, if this is still getting called somewhere we have a bug. The slight issue with that is that the crtc helper abuses dpms off to disable unused functions. Hence we also need to implement a default encoder disable function to do just that with the new encoder->disable callback. - Note that we drop the cpt modeset verification in the commit callback, too. The right place to do this would be in the crtc's enable function, _after_ all the encoders are set up. But because not all encoders are converted yet, we can't do that. Hence disable this check temporarily as a minor concession to bisectability. v2: Squash the dpms mode to only the supported values - connector->dpms is for internal tracking only, we can hence avoid needless state-changes a bit whithout causing harm. v3: Apply bikeshed to disable|enable_ddi, suggested by Paulo Zanoni. Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-06-30 14:59:56 +08:00
struct drm_device *dev = encoder->base.dev;
drm/i915: prepare HDMI link for Haswell On Haswell, we need to properly train the DDI buffers prior to enabling HDMI, and enable the required clocks with correct dividers for the desired frequency. Also, we cannot simple reuse HDMI routines from previous generations of GPU, as most of HDMI-specific stuff is being done via the DDI port programming instead of HDMI-specific registers. This commit take advantage of the WR PLL clock table which is in a separate (previous) commit to select the right divisors for each mode. Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-05-10 02:37:31 +08:00
struct drm_i915_private *dev_priv = dev->dev_private;
drm/i915/hdmi: convert to encoder->disable/enable I've picked hdmi as the first encoder to convert because it's rather simple: - no cloning possible - no differences between prepare/commit and dpms off/on switching. A few changes are required to do so: - Split up the dpms code into an enable/disable function and wire it up with the intel encoder. - Noop out the existing encoder prepare/commit functions used by the crtc helper - our crtc enable/disable code now calls back into the encoder enable/disable code at the right spot. - Create new helper functions to handle dpms changes. - Add intel_encoder->connectors_active to better track dpms state. Atm this is unused, but it will be useful to correctly disable the entire display pipe for cloned configurations. Also note that for now this is only useful in the dpms code - thanks to the crtc helper's dpms confusion across a modeset operation we can't (yet) rely on this having a sensible value in all circumstances. - Rip out the encoder helper dpms callback, if this is still getting called somewhere we have a bug. The slight issue with that is that the crtc helper abuses dpms off to disable unused functions. Hence we also need to implement a default encoder disable function to do just that with the new encoder->disable callback. - Note that we drop the cpt modeset verification in the commit callback, too. The right place to do this would be in the crtc's enable function, _after_ all the encoders are set up. But because not all encoders are converted yet, we can't do that. Hence disable this check temporarily as a minor concession to bisectability. v2: Squash the dpms mode to only the supported values - connector->dpms is for internal tracking only, we can hence avoid needless state-changes a bit whithout causing harm. v3: Apply bikeshed to disable|enable_ddi, suggested by Paulo Zanoni. Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-06-30 14:59:56 +08:00
struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base);
drm/i915: prepare HDMI link for Haswell On Haswell, we need to properly train the DDI buffers prior to enabling HDMI, and enable the required clocks with correct dividers for the desired frequency. Also, we cannot simple reuse HDMI routines from previous generations of GPU, as most of HDMI-specific stuff is being done via the DDI port programming instead of HDMI-specific registers. This commit take advantage of the WR PLL clock table which is in a separate (previous) commit to select the right divisors for each mode. Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-05-10 02:37:31 +08:00
int port = intel_hdmi->ddi_port;
u32 temp;
temp = I915_READ(DDI_BUF_CTL(port));
drm/i915/hdmi: convert to encoder->disable/enable I've picked hdmi as the first encoder to convert because it's rather simple: - no cloning possible - no differences between prepare/commit and dpms off/on switching. A few changes are required to do so: - Split up the dpms code into an enable/disable function and wire it up with the intel encoder. - Noop out the existing encoder prepare/commit functions used by the crtc helper - our crtc enable/disable code now calls back into the encoder enable/disable code at the right spot. - Create new helper functions to handle dpms changes. - Add intel_encoder->connectors_active to better track dpms state. Atm this is unused, but it will be useful to correctly disable the entire display pipe for cloned configurations. Also note that for now this is only useful in the dpms code - thanks to the crtc helper's dpms confusion across a modeset operation we can't (yet) rely on this having a sensible value in all circumstances. - Rip out the encoder helper dpms callback, if this is still getting called somewhere we have a bug. The slight issue with that is that the crtc helper abuses dpms off to disable unused functions. Hence we also need to implement a default encoder disable function to do just that with the new encoder->disable callback. - Note that we drop the cpt modeset verification in the commit callback, too. The right place to do this would be in the crtc's enable function, _after_ all the encoders are set up. But because not all encoders are converted yet, we can't do that. Hence disable this check temporarily as a minor concession to bisectability. v2: Squash the dpms mode to only the supported values - connector->dpms is for internal tracking only, we can hence avoid needless state-changes a bit whithout causing harm. v3: Apply bikeshed to disable|enable_ddi, suggested by Paulo Zanoni. Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-06-30 14:59:56 +08:00
temp |= DDI_BUF_CTL_ENABLE;
drm/i915: prepare HDMI link for Haswell On Haswell, we need to properly train the DDI buffers prior to enabling HDMI, and enable the required clocks with correct dividers for the desired frequency. Also, we cannot simple reuse HDMI routines from previous generations of GPU, as most of HDMI-specific stuff is being done via the DDI port programming instead of HDMI-specific registers. This commit take advantage of the WR PLL clock table which is in a separate (previous) commit to select the right divisors for each mode. Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-05-10 02:37:31 +08:00
/* Enable DDI_BUF_CTL. In HDMI/DVI mode, the port width,
* and swing/emphasis values are ignored so nothing special needs
* to be done besides enabling the port.
*/
drm/i915/hdmi: convert to encoder->disable/enable I've picked hdmi as the first encoder to convert because it's rather simple: - no cloning possible - no differences between prepare/commit and dpms off/on switching. A few changes are required to do so: - Split up the dpms code into an enable/disable function and wire it up with the intel encoder. - Noop out the existing encoder prepare/commit functions used by the crtc helper - our crtc enable/disable code now calls back into the encoder enable/disable code at the right spot. - Create new helper functions to handle dpms changes. - Add intel_encoder->connectors_active to better track dpms state. Atm this is unused, but it will be useful to correctly disable the entire display pipe for cloned configurations. Also note that for now this is only useful in the dpms code - thanks to the crtc helper's dpms confusion across a modeset operation we can't (yet) rely on this having a sensible value in all circumstances. - Rip out the encoder helper dpms callback, if this is still getting called somewhere we have a bug. The slight issue with that is that the crtc helper abuses dpms off to disable unused functions. Hence we also need to implement a default encoder disable function to do just that with the new encoder->disable callback. - Note that we drop the cpt modeset verification in the commit callback, too. The right place to do this would be in the crtc's enable function, _after_ all the encoders are set up. But because not all encoders are converted yet, we can't do that. Hence disable this check temporarily as a minor concession to bisectability. v2: Squash the dpms mode to only the supported values - connector->dpms is for internal tracking only, we can hence avoid needless state-changes a bit whithout causing harm. v3: Apply bikeshed to disable|enable_ddi, suggested by Paulo Zanoni. Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-06-30 14:59:56 +08:00
I915_WRITE(DDI_BUF_CTL(port), temp);
}
void intel_disable_ddi(struct intel_encoder *encoder)
{
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(&encoder->base);
int port = intel_hdmi->ddi_port;
u32 temp;
temp = I915_READ(DDI_BUF_CTL(port));
temp &= ~DDI_BUF_CTL_ENABLE;
I915_WRITE(DDI_BUF_CTL(port), temp);
drm/i915: prepare HDMI link for Haswell On Haswell, we need to properly train the DDI buffers prior to enabling HDMI, and enable the required clocks with correct dividers for the desired frequency. Also, we cannot simple reuse HDMI routines from previous generations of GPU, as most of HDMI-specific stuff is being done via the DDI port programming instead of HDMI-specific registers. This commit take advantage of the WR PLL clock table which is in a separate (previous) commit to select the right divisors for each mode. Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-05-10 02:37:31 +08:00
}
drm/i915: rewrite the LCPLL code Right now, we're trying to enable LCPLL at every mode set, but we're never disabling it. Also, we really don't want to be disabling LCPLL since it requires a very complex disable/enable sequence. This register should really be set by the BIOS and we shouldn't be touching it. Still, let's try to check its value and print some errors in case we find something wrong. We're also adding intel_ddi_get_cdclk_freq which will be used later in other places. Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2012-10-05 23:05:52 +08:00
static int intel_ddi_get_cdclk_freq(struct drm_i915_private *dev_priv)
{
if (I915_READ(HSW_FUSE_STRAP) & HSW_CDCLK_LIMIT)
return 450;
else if ((I915_READ(LCPLL_CTL) & LCPLL_CLK_FREQ_MASK) ==
LCPLL_CLK_FREQ_450)
return 450;
else
return 540;
}
void intel_ddi_pll_init(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
uint32_t val = I915_READ(LCPLL_CTL);
/* The LCPLL register should be turned on by the BIOS. For now let's
* just check its state and print errors in case something is wrong.
* Don't even try to turn it on.
*/
DRM_DEBUG_KMS("CDCLK running at %dMHz\n",
intel_ddi_get_cdclk_freq(dev_priv));
if (val & LCPLL_CD_SOURCE_FCLK)
DRM_ERROR("CDCLK source is not LCPLL\n");
if (val & LCPLL_PLL_DISABLE)
DRM_ERROR("LCPLL is disabled\n");
}