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drm/i915: Treat PCH eDP like DP in most places 

PCH eDP has many of the same needs as regular PCH DP connections,
including the DP_CTl bit settings, the TRANS_DP_CTL register.

Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Keith Packard 2011-11-01 19:54:11 -07:00
parent 93f62dad5f
commit 417e822dee
2 changed files with 72 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/gpu/drm/i915/intel_display.c
View File

@ -2933,7 +2933,8 @@ static void ironlake_pch_enable(struct drm_crtc *crtc)
/* For PCH DP, enable TRANS_DP_CTL */
if (HAS_PCH_CPT(dev) &&
intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT)) {
(intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT) ||
intel_pipe_has_type(crtc, INTEL_OUTPUT_EDP))) {
u32 bpc = (I915_READ(PIPECONF(pipe)) & PIPE_BPC_MASK) >> 5;
reg = TRANS_DP_CTL(pipe);
temp = I915_READ(reg);

103
drivers/gpu/drm/i915/intel_dp.c
View File

@ -766,10 +766,10 @@ intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode,
continue;
intel_dp = enc_to_intel_dp(encoder);
if (intel_dp->base.type == INTEL_OUTPUT_DISPLAYPORT) {
if (intel_dp->base.type == INTEL_OUTPUT_DISPLAYPORT || is_pch_edp(intel_dp)) {
lane_count = intel_dp->lane_count;
break;
} else if (is_edp(intel_dp)) {
} else if (is_cpu_edp(intel_dp)) {
lane_count = dev_priv->edp.lanes;
break;
}
@ -808,6 +808,7 @@ intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
struct drm_device *dev = encoder->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
struct drm_crtc *crtc = intel_dp->base.base.crtc;
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
@ -820,18 +821,31 @@ intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode,
ironlake_edp_pll_off(encoder);
}
intel_dp->DP = DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
intel_dp->DP |= intel_dp->color_range;
/*
* There are three kinds of DP registers:
*
* IBX PCH
* CPU
* CPT PCH
*
* IBX PCH and CPU are the same for almost everything,
* except that the CPU DP PLL is configured in this
* register
*
* CPT PCH is quite different, having many bits moved
* to the TRANS_DP_CTL register instead. That
* configuration happens (oddly) in ironlake_pch_enable
*/
if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
intel_dp->DP |= DP_SYNC_HS_HIGH;
if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
intel_dp->DP |= DP_SYNC_VS_HIGH;
/* Preserve the BIOS-computed detected bit. This is
* supposed to be read-only.
*/
intel_dp->DP = I915_READ(intel_dp->output_reg) & DP_DETECTED;
intel_dp->DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
if (HAS_PCH_CPT(dev) && !is_cpu_edp(intel_dp))
intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
else
intel_dp->DP |= DP_LINK_TRAIN_OFF;
/* Handle DP bits in common between all three register formats */
intel_dp->DP |= DP_VOLTAGE_0_4 | DP_PRE_EMPHASIS_0;
switch (intel_dp->lane_count) {
case 1:
@ -850,32 +864,45 @@ intel_dp_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode,
intel_dp->DP |= DP_AUDIO_OUTPUT_ENABLE;
intel_write_eld(encoder, adjusted_mode);
}
memset(intel_dp->link_configuration, 0, DP_LINK_CONFIGURATION_SIZE);
intel_dp->link_configuration[0] = intel_dp->link_bw;
intel_dp->link_configuration[1] = intel_dp->lane_count;
intel_dp->link_configuration[8] = DP_SET_ANSI_8B10B;
/*
* Check for DPCD version > 1.1 and enhanced framing support
*/
if (intel_dp->dpcd[DP_DPCD_REV] >= 0x11 &&
(intel_dp->dpcd[DP_MAX_LANE_COUNT] & DP_ENHANCED_FRAME_CAP)) {
intel_dp->link_configuration[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
intel_dp->DP |= DP_ENHANCED_FRAMING;
}
/* CPT DP's pipe select is decided in TRANS_DP_CTL */
if (intel_crtc->pipe == 1 && !HAS_PCH_CPT(dev))
intel_dp->DP |= DP_PIPEB_SELECT;
/* Split out the IBX/CPU vs CPT settings */
if (is_cpu_edp(intel_dp)) {
/* don't miss out required setting for eDP */
intel_dp->DP |= DP_PLL_ENABLE;
if (adjusted_mode->clock < 200000)
intel_dp->DP |= DP_PLL_FREQ_160MHZ;
else
intel_dp->DP |= DP_PLL_FREQ_270MHZ;
if (!HAS_PCH_CPT(dev) || is_cpu_edp(intel_dp)) {
intel_dp->DP |= intel_dp->color_range;
if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
intel_dp->DP |= DP_SYNC_HS_HIGH;
if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
intel_dp->DP |= DP_SYNC_VS_HIGH;
intel_dp->DP |= DP_LINK_TRAIN_OFF;
if (intel_dp->link_configuration[1] & DP_LANE_COUNT_ENHANCED_FRAME_EN)
intel_dp->DP |= DP_ENHANCED_FRAMING;
if (intel_crtc->pipe == 1)
intel_dp->DP |= DP_PIPEB_SELECT;
if (is_cpu_edp(intel_dp)) {
/* don't miss out required setting for eDP */
intel_dp->DP |= DP_PLL_ENABLE;
if (adjusted_mode->clock < 200000)
intel_dp->DP |= DP_PLL_FREQ_160MHZ;
else
intel_dp->DP |= DP_PLL_FREQ_270MHZ;
}
} else {
intel_dp->DP |= DP_LINK_TRAIN_OFF_CPT;
}
}
@ -1341,6 +1368,7 @@ static char *link_train_names[] = {
* a maximum voltage of 800mV and a maximum pre-emphasis of 6dB
*/
#define I830_DP_VOLTAGE_MAX DP_TRAIN_VOLTAGE_SWING_800
#define I830_DP_VOLTAGE_MAX_CPT DP_TRAIN_VOLTAGE_SWING_1200
static uint8_t
intel_dp_pre_emphasis_max(uint8_t voltage_swing)
@ -1378,8 +1406,12 @@ intel_get_adjust_train(struct intel_dp *intel_dp, uint8_t link_status[DP_LINK_ST
p = this_p;
}
if (v >= I830_DP_VOLTAGE_MAX)
v = I830_DP_VOLTAGE_MAX | DP_TRAIN_MAX_SWING_REACHED;
if (HAS_PCH_CPT(dev) && !is_cpu_edp(intel_dp))
voltage_max = I830_DP_VOLTAGE_MAX_CPT;
else
voltage_max = I830_DP_VOLTAGE_MAX;
if (v >= voltage_max)
v = voltage_max | DP_TRAIN_MAX_SWING_REACHED;
if (p >= intel_dp_pre_emphasis_max(v))
p = intel_dp_pre_emphasis_max(v) | DP_TRAIN_MAX_PRE_EMPHASIS_REACHED;
@ -1570,7 +1602,8 @@ intel_dp_start_link_train(struct intel_dp *intel_dp)
/* Use intel_dp->train_set[0] to set the voltage and pre emphasis values */
uint8_t link_status[DP_LINK_STATUS_SIZE];
uint32_t signal_levels;
if (IS_GEN6(dev) && is_edp(intel_dp)) {
if (IS_GEN6(dev) && is_cpu_edp(intel_dp)) {
signal_levels = intel_gen6_edp_signal_levels(intel_dp->train_set[0]);
DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels;
} else {
@ -1650,12 +1683,11 @@ intel_dp_complete_link_train(struct intel_dp *intel_dp)
break;
}
if (IS_GEN6(dev) && is_edp(intel_dp)) {
if (IS_GEN6(dev) && is_cpu_edp(intel_dp)) {
signal_levels = intel_gen6_edp_signal_levels(intel_dp->train_set[0]);
DP = (DP & ~EDP_LINK_TRAIN_VOL_EMP_MASK_SNB) | signal_levels;
} else {
signal_levels = intel_dp_signal_levels(intel_dp->train_set[0]);
DRM_DEBUG_KMS("training pattern 1 signal levels %08x\n", signal_levels);
DP = (DP & ~(DP_VOLTAGE_MASK|DP_PRE_EMPHASIS_MASK)) | signal_levels;
}
@ -1741,8 +1773,12 @@ intel_dp_link_down(struct intel_dp *intel_dp)
msleep(17);
if (is_edp(intel_dp))
DP |= DP_LINK_TRAIN_OFF;
if (is_edp(intel_dp)) {
if (HAS_PCH_CPT(dev) && !is_cpu_edp(intel_dp))
DP |= DP_LINK_TRAIN_OFF_CPT;
else
DP |= DP_LINK_TRAIN_OFF;
}
if (!HAS_PCH_CPT(dev) &&
I915_READ(intel_dp->output_reg) & DP_PIPEB_SELECT) {
@ -2186,7 +2222,8 @@ intel_trans_dp_port_sel(struct drm_crtc *crtc)
continue;
intel_dp = enc_to_intel_dp(encoder);
if (intel_dp->base.type == INTEL_OUTPUT_DISPLAYPORT)
if (intel_dp->base.type == INTEL_OUTPUT_DISPLAYPORT ||
intel_dp->base.type == INTEL_OUTPUT_EDP)
return intel_dp->output_reg;
}