518 lines
14 KiB
C
518 lines
14 KiB
C
/*
|
|
*
|
|
* Copyright (c) 2012 Gilles Dartiguelongue, Thomas Richter
|
|
*
|
|
* All Rights Reserved.
|
|
*
|
|
* 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, sub license, 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 NON-INFRINGEMENT.
|
|
* IN NO EVENT SHALL THE AUTHOR 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.
|
|
*
|
|
*/
|
|
|
|
#include "dvo.h"
|
|
#include "i915_reg.h"
|
|
#include "i915_drv.h"
|
|
|
|
#define NS2501_VID 0x1305
|
|
#define NS2501_DID 0x6726
|
|
|
|
#define NS2501_VID_LO 0x00
|
|
#define NS2501_VID_HI 0x01
|
|
#define NS2501_DID_LO 0x02
|
|
#define NS2501_DID_HI 0x03
|
|
#define NS2501_REV 0x04
|
|
#define NS2501_RSVD 0x05
|
|
#define NS2501_FREQ_LO 0x06
|
|
#define NS2501_FREQ_HI 0x07
|
|
|
|
#define NS2501_REG8 0x08
|
|
#define NS2501_8_VEN (1<<5)
|
|
#define NS2501_8_HEN (1<<4)
|
|
#define NS2501_8_DSEL (1<<3)
|
|
#define NS2501_8_BPAS (1<<2)
|
|
#define NS2501_8_RSVD (1<<1)
|
|
#define NS2501_8_PD (1<<0)
|
|
|
|
#define NS2501_REG9 0x09
|
|
#define NS2501_9_VLOW (1<<7)
|
|
#define NS2501_9_MSEL_MASK (0x7<<4)
|
|
#define NS2501_9_TSEL (1<<3)
|
|
#define NS2501_9_RSEN (1<<2)
|
|
#define NS2501_9_RSVD (1<<1)
|
|
#define NS2501_9_MDI (1<<0)
|
|
|
|
#define NS2501_REGC 0x0c
|
|
|
|
struct ns2501_priv {
|
|
//I2CDevRec d;
|
|
bool quiet;
|
|
int reg_8_shadow;
|
|
int reg_8_set;
|
|
// Shadow registers for i915
|
|
int dvoc;
|
|
int pll_a;
|
|
int srcdim;
|
|
int fw_blc;
|
|
};
|
|
|
|
#define NSPTR(d) ((NS2501Ptr)(d->DriverPrivate.ptr))
|
|
|
|
/*
|
|
* For reasons unclear to me, the ns2501 at least on the Fujitsu/Siemens
|
|
* laptops does not react on the i2c bus unless
|
|
* both the PLL is running and the display is configured in its native
|
|
* resolution.
|
|
* This function forces the DVO on, and stores the registers it touches.
|
|
* Afterwards, registers are restored to regular values.
|
|
*
|
|
* This is pretty much a hack, though it works.
|
|
* Without that, ns2501_readb and ns2501_writeb fail
|
|
* when switching the resolution.
|
|
*/
|
|
|
|
/*
|
|
** Read a register from the ns2501.
|
|
** Returns true if successful, false otherwise.
|
|
** If it returns false, it might be wise to enable the
|
|
** DVO with the above function.
|
|
*/
|
|
static bool ns2501_readb(struct intel_dvo_device *dvo, int addr, uint8_t * ch)
|
|
{
|
|
struct ns2501_priv *ns = dvo->dev_priv;
|
|
struct i2c_adapter *adapter = dvo->i2c_bus;
|
|
u8 out_buf[2];
|
|
u8 in_buf[2];
|
|
|
|
struct i2c_msg msgs[] = {
|
|
{
|
|
.addr = dvo->slave_addr,
|
|
.flags = 0,
|
|
.len = 1,
|
|
.buf = out_buf,
|
|
},
|
|
{
|
|
.addr = dvo->slave_addr,
|
|
.flags = I2C_M_RD,
|
|
.len = 1,
|
|
.buf = in_buf,
|
|
}
|
|
};
|
|
|
|
out_buf[0] = addr;
|
|
out_buf[1] = 0;
|
|
|
|
if (i2c_transfer(adapter, msgs, 2) == 2) {
|
|
*ch = in_buf[0];
|
|
return true;
|
|
}
|
|
|
|
if (!ns->quiet) {
|
|
DRM_DEBUG_KMS
|
|
("Unable to read register 0x%02x from %s:0x%02x.\n", addr,
|
|
adapter->name, dvo->slave_addr);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
** Write a register to the ns2501.
|
|
** Returns true if successful, false otherwise.
|
|
** If it returns false, it might be wise to enable the
|
|
** DVO with the above function.
|
|
*/
|
|
static bool ns2501_writeb(struct intel_dvo_device *dvo, int addr, uint8_t ch)
|
|
{
|
|
struct ns2501_priv *ns = dvo->dev_priv;
|
|
struct i2c_adapter *adapter = dvo->i2c_bus;
|
|
uint8_t out_buf[2];
|
|
|
|
struct i2c_msg msg = {
|
|
.addr = dvo->slave_addr,
|
|
.flags = 0,
|
|
.len = 2,
|
|
.buf = out_buf,
|
|
};
|
|
|
|
out_buf[0] = addr;
|
|
out_buf[1] = ch;
|
|
|
|
if (i2c_transfer(adapter, &msg, 1) == 1) {
|
|
return true;
|
|
}
|
|
|
|
if (!ns->quiet) {
|
|
DRM_DEBUG_KMS("Unable to write register 0x%02x to %s:%d\n",
|
|
addr, adapter->name, dvo->slave_addr);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/* National Semiconductor 2501 driver for chip on i2c bus
|
|
* scan for the chip on the bus.
|
|
* Hope the VBIOS initialized the PLL correctly so we can
|
|
* talk to it. If not, it will not be seen and not detected.
|
|
* Bummer!
|
|
*/
|
|
static bool ns2501_init(struct intel_dvo_device *dvo,
|
|
struct i2c_adapter *adapter)
|
|
{
|
|
/* this will detect the NS2501 chip on the specified i2c bus */
|
|
struct ns2501_priv *ns;
|
|
unsigned char ch;
|
|
|
|
ns = kzalloc(sizeof(struct ns2501_priv), GFP_KERNEL);
|
|
if (ns == NULL)
|
|
return false;
|
|
|
|
dvo->i2c_bus = adapter;
|
|
dvo->dev_priv = ns;
|
|
ns->quiet = true;
|
|
|
|
if (!ns2501_readb(dvo, NS2501_VID_LO, &ch))
|
|
goto out;
|
|
|
|
if (ch != (NS2501_VID & 0xff)) {
|
|
DRM_DEBUG_KMS("ns2501 not detected got %d: from %s Slave %d.\n",
|
|
ch, adapter->name, dvo->slave_addr);
|
|
goto out;
|
|
}
|
|
|
|
if (!ns2501_readb(dvo, NS2501_DID_LO, &ch))
|
|
goto out;
|
|
|
|
if (ch != (NS2501_DID & 0xff)) {
|
|
DRM_DEBUG_KMS("ns2501 not detected got %d: from %s Slave %d.\n",
|
|
ch, adapter->name, dvo->slave_addr);
|
|
goto out;
|
|
}
|
|
ns->quiet = false;
|
|
ns->reg_8_set = 0;
|
|
ns->reg_8_shadow =
|
|
NS2501_8_PD | NS2501_8_BPAS | NS2501_8_VEN | NS2501_8_HEN;
|
|
|
|
DRM_DEBUG_KMS("init ns2501 dvo controller successfully!\n");
|
|
return true;
|
|
|
|
out:
|
|
kfree(ns);
|
|
return false;
|
|
}
|
|
|
|
static enum drm_connector_status ns2501_detect(struct intel_dvo_device *dvo)
|
|
{
|
|
/*
|
|
* This is a Laptop display, it doesn't have hotplugging.
|
|
* Even if not, the detection bit of the 2501 is unreliable as
|
|
* it only works for some display types.
|
|
* It is even more unreliable as the PLL must be active for
|
|
* allowing reading from the chiop.
|
|
*/
|
|
return connector_status_connected;
|
|
}
|
|
|
|
static enum drm_mode_status ns2501_mode_valid(struct intel_dvo_device *dvo,
|
|
struct drm_display_mode *mode)
|
|
{
|
|
DRM_DEBUG_KMS
|
|
("is mode valid (hdisplay=%d,htotal=%d,vdisplay=%d,vtotal=%d)\n",
|
|
mode->hdisplay, mode->htotal, mode->vdisplay, mode->vtotal);
|
|
|
|
/*
|
|
* Currently, these are all the modes I have data from.
|
|
* More might exist. Unclear how to find the native resolution
|
|
* of the panel in here so we could always accept it
|
|
* by disabling the scaler.
|
|
*/
|
|
if ((mode->hdisplay == 800 && mode->vdisplay == 600) ||
|
|
(mode->hdisplay == 640 && mode->vdisplay == 480) ||
|
|
(mode->hdisplay == 1024 && mode->vdisplay == 768)) {
|
|
return MODE_OK;
|
|
} else {
|
|
return MODE_ONE_SIZE; /* Is this a reasonable error? */
|
|
}
|
|
}
|
|
|
|
static void ns2501_mode_set(struct intel_dvo_device *dvo,
|
|
struct drm_display_mode *mode,
|
|
struct drm_display_mode *adjusted_mode)
|
|
{
|
|
bool ok;
|
|
int retries = 10;
|
|
struct ns2501_priv *ns = (struct ns2501_priv *)(dvo->dev_priv);
|
|
|
|
DRM_DEBUG_KMS
|
|
("set mode (hdisplay=%d,htotal=%d,vdisplay=%d,vtotal=%d).\n",
|
|
mode->hdisplay, mode->htotal, mode->vdisplay, mode->vtotal);
|
|
|
|
/*
|
|
* Where do I find the native resolution for which scaling is not required???
|
|
*
|
|
* First trigger the DVO on as otherwise the chip does not appear on the i2c
|
|
* bus.
|
|
*/
|
|
do {
|
|
ok = true;
|
|
|
|
if (mode->hdisplay == 800 && mode->vdisplay == 600) {
|
|
/* mode 277 */
|
|
ns->reg_8_shadow &= ~NS2501_8_BPAS;
|
|
DRM_DEBUG_KMS("switching to 800x600\n");
|
|
|
|
/*
|
|
* No, I do not know where this data comes from.
|
|
* It is just what the video bios left in the DVO, so
|
|
* I'm just copying it here over.
|
|
* This also means that I cannot support any other modes
|
|
* except the ones supported by the bios.
|
|
*/
|
|
ok &= ns2501_writeb(dvo, 0x11, 0xc8); // 0xc7 also works.
|
|
ok &= ns2501_writeb(dvo, 0x1b, 0x19);
|
|
ok &= ns2501_writeb(dvo, 0x1c, 0x62); // VBIOS left 0x64 here, but 0x62 works nicer
|
|
ok &= ns2501_writeb(dvo, 0x1d, 0x02);
|
|
|
|
ok &= ns2501_writeb(dvo, 0x34, 0x03);
|
|
ok &= ns2501_writeb(dvo, 0x35, 0xff);
|
|
|
|
ok &= ns2501_writeb(dvo, 0x80, 0x27);
|
|
ok &= ns2501_writeb(dvo, 0x81, 0x03);
|
|
ok &= ns2501_writeb(dvo, 0x82, 0x41);
|
|
ok &= ns2501_writeb(dvo, 0x83, 0x05);
|
|
|
|
ok &= ns2501_writeb(dvo, 0x8d, 0x02);
|
|
ok &= ns2501_writeb(dvo, 0x8e, 0x04);
|
|
ok &= ns2501_writeb(dvo, 0x8f, 0x00);
|
|
|
|
ok &= ns2501_writeb(dvo, 0x90, 0xfe); /* vertical. VBIOS left 0xff here, but 0xfe works better */
|
|
ok &= ns2501_writeb(dvo, 0x91, 0x07);
|
|
ok &= ns2501_writeb(dvo, 0x94, 0x00);
|
|
ok &= ns2501_writeb(dvo, 0x95, 0x00);
|
|
|
|
ok &= ns2501_writeb(dvo, 0x96, 0x00);
|
|
|
|
ok &= ns2501_writeb(dvo, 0x99, 0x00);
|
|
ok &= ns2501_writeb(dvo, 0x9a, 0x88);
|
|
|
|
ok &= ns2501_writeb(dvo, 0x9c, 0x23); /* Looks like first and last line of the image. */
|
|
ok &= ns2501_writeb(dvo, 0x9d, 0x00);
|
|
ok &= ns2501_writeb(dvo, 0x9e, 0x25);
|
|
ok &= ns2501_writeb(dvo, 0x9f, 0x03);
|
|
|
|
ok &= ns2501_writeb(dvo, 0xa4, 0x80);
|
|
|
|
ok &= ns2501_writeb(dvo, 0xb6, 0x00);
|
|
|
|
ok &= ns2501_writeb(dvo, 0xb9, 0xc8); /* horizontal? */
|
|
ok &= ns2501_writeb(dvo, 0xba, 0x00); /* horizontal? */
|
|
|
|
ok &= ns2501_writeb(dvo, 0xc0, 0x05); /* horizontal? */
|
|
ok &= ns2501_writeb(dvo, 0xc1, 0xd7);
|
|
|
|
ok &= ns2501_writeb(dvo, 0xc2, 0x00);
|
|
ok &= ns2501_writeb(dvo, 0xc3, 0xf8);
|
|
|
|
ok &= ns2501_writeb(dvo, 0xc4, 0x03);
|
|
ok &= ns2501_writeb(dvo, 0xc5, 0x1a);
|
|
|
|
ok &= ns2501_writeb(dvo, 0xc6, 0x00);
|
|
ok &= ns2501_writeb(dvo, 0xc7, 0x73);
|
|
ok &= ns2501_writeb(dvo, 0xc8, 0x02);
|
|
|
|
} else if (mode->hdisplay == 640 && mode->vdisplay == 480) {
|
|
/* mode 274 */
|
|
DRM_DEBUG_KMS("switching to 640x480\n");
|
|
/*
|
|
* No, I do not know where this data comes from.
|
|
* It is just what the video bios left in the DVO, so
|
|
* I'm just copying it here over.
|
|
* This also means that I cannot support any other modes
|
|
* except the ones supported by the bios.
|
|
*/
|
|
ns->reg_8_shadow &= ~NS2501_8_BPAS;
|
|
|
|
ok &= ns2501_writeb(dvo, 0x11, 0xa0);
|
|
ok &= ns2501_writeb(dvo, 0x1b, 0x11);
|
|
ok &= ns2501_writeb(dvo, 0x1c, 0x54);
|
|
ok &= ns2501_writeb(dvo, 0x1d, 0x03);
|
|
|
|
ok &= ns2501_writeb(dvo, 0x34, 0x03);
|
|
ok &= ns2501_writeb(dvo, 0x35, 0xff);
|
|
|
|
ok &= ns2501_writeb(dvo, 0x80, 0xff);
|
|
ok &= ns2501_writeb(dvo, 0x81, 0x07);
|
|
ok &= ns2501_writeb(dvo, 0x82, 0x3d);
|
|
ok &= ns2501_writeb(dvo, 0x83, 0x05);
|
|
|
|
ok &= ns2501_writeb(dvo, 0x8d, 0x02);
|
|
ok &= ns2501_writeb(dvo, 0x8e, 0x10);
|
|
ok &= ns2501_writeb(dvo, 0x8f, 0x00);
|
|
|
|
ok &= ns2501_writeb(dvo, 0x90, 0xff); /* vertical */
|
|
ok &= ns2501_writeb(dvo, 0x91, 0x07);
|
|
ok &= ns2501_writeb(dvo, 0x94, 0x00);
|
|
ok &= ns2501_writeb(dvo, 0x95, 0x00);
|
|
|
|
ok &= ns2501_writeb(dvo, 0x96, 0x05);
|
|
|
|
ok &= ns2501_writeb(dvo, 0x99, 0x00);
|
|
ok &= ns2501_writeb(dvo, 0x9a, 0x88);
|
|
|
|
ok &= ns2501_writeb(dvo, 0x9c, 0x24);
|
|
ok &= ns2501_writeb(dvo, 0x9d, 0x00);
|
|
ok &= ns2501_writeb(dvo, 0x9e, 0x25);
|
|
ok &= ns2501_writeb(dvo, 0x9f, 0x03);
|
|
|
|
ok &= ns2501_writeb(dvo, 0xa4, 0x84);
|
|
|
|
ok &= ns2501_writeb(dvo, 0xb6, 0x09);
|
|
|
|
ok &= ns2501_writeb(dvo, 0xb9, 0xa0); /* horizontal? */
|
|
ok &= ns2501_writeb(dvo, 0xba, 0x00); /* horizontal? */
|
|
|
|
ok &= ns2501_writeb(dvo, 0xc0, 0x05); /* horizontal? */
|
|
ok &= ns2501_writeb(dvo, 0xc1, 0x90);
|
|
|
|
ok &= ns2501_writeb(dvo, 0xc2, 0x00);
|
|
ok &= ns2501_writeb(dvo, 0xc3, 0x0f);
|
|
|
|
ok &= ns2501_writeb(dvo, 0xc4, 0x03);
|
|
ok &= ns2501_writeb(dvo, 0xc5, 0x16);
|
|
|
|
ok &= ns2501_writeb(dvo, 0xc6, 0x00);
|
|
ok &= ns2501_writeb(dvo, 0xc7, 0x02);
|
|
ok &= ns2501_writeb(dvo, 0xc8, 0x02);
|
|
|
|
} else if (mode->hdisplay == 1024 && mode->vdisplay == 768) {
|
|
/* mode 280 */
|
|
DRM_DEBUG_KMS("switching to 1024x768\n");
|
|
/*
|
|
* This might or might not work, actually. I'm silently
|
|
* assuming here that the native panel resolution is
|
|
* 1024x768. If not, then this leaves the scaler disabled
|
|
* generating a picture that is likely not the expected.
|
|
*
|
|
* Problem is that I do not know where to take the panel
|
|
* dimensions from.
|
|
*
|
|
* Enable the bypass, scaling not required.
|
|
*
|
|
* The scaler registers are irrelevant here....
|
|
*
|
|
*/
|
|
ns->reg_8_shadow |= NS2501_8_BPAS;
|
|
ok &= ns2501_writeb(dvo, 0x37, 0x44);
|
|
} else {
|
|
/*
|
|
* Data not known. Bummer!
|
|
* Hopefully, the code should not go here
|
|
* as mode_OK delivered no other modes.
|
|
*/
|
|
ns->reg_8_shadow |= NS2501_8_BPAS;
|
|
}
|
|
ok &= ns2501_writeb(dvo, NS2501_REG8, ns->reg_8_shadow);
|
|
} while (!ok && retries--);
|
|
}
|
|
|
|
/* set the NS2501 power state */
|
|
static bool ns2501_get_hw_state(struct intel_dvo_device *dvo)
|
|
{
|
|
unsigned char ch;
|
|
|
|
if (!ns2501_readb(dvo, NS2501_REG8, &ch))
|
|
return false;
|
|
|
|
if (ch & NS2501_8_PD)
|
|
return true;
|
|
else
|
|
return false;
|
|
}
|
|
|
|
/* set the NS2501 power state */
|
|
static void ns2501_dpms(struct intel_dvo_device *dvo, bool enable)
|
|
{
|
|
bool ok;
|
|
int retries = 10;
|
|
struct ns2501_priv *ns = (struct ns2501_priv *)(dvo->dev_priv);
|
|
unsigned char ch;
|
|
|
|
DRM_DEBUG_KMS("Trying set the dpms of the DVO to %i\n", enable);
|
|
|
|
ch = ns->reg_8_shadow;
|
|
|
|
if (enable)
|
|
ch |= NS2501_8_PD;
|
|
else
|
|
ch &= ~NS2501_8_PD;
|
|
|
|
if (ns->reg_8_set == 0 || ns->reg_8_shadow != ch) {
|
|
ns->reg_8_set = 1;
|
|
ns->reg_8_shadow = ch;
|
|
|
|
do {
|
|
ok = true;
|
|
ok &= ns2501_writeb(dvo, NS2501_REG8, ch);
|
|
ok &=
|
|
ns2501_writeb(dvo, 0x34,
|
|
enable ? 0x03 : 0x00);
|
|
ok &=
|
|
ns2501_writeb(dvo, 0x35,
|
|
enable ? 0xff : 0x00);
|
|
} while (!ok && retries--);
|
|
}
|
|
}
|
|
|
|
static void ns2501_dump_regs(struct intel_dvo_device *dvo)
|
|
{
|
|
uint8_t val;
|
|
|
|
ns2501_readb(dvo, NS2501_FREQ_LO, &val);
|
|
DRM_DEBUG_KMS("NS2501_FREQ_LO: 0x%02x\n", val);
|
|
ns2501_readb(dvo, NS2501_FREQ_HI, &val);
|
|
DRM_DEBUG_KMS("NS2501_FREQ_HI: 0x%02x\n", val);
|
|
ns2501_readb(dvo, NS2501_REG8, &val);
|
|
DRM_DEBUG_KMS("NS2501_REG8: 0x%02x\n", val);
|
|
ns2501_readb(dvo, NS2501_REG9, &val);
|
|
DRM_DEBUG_KMS("NS2501_REG9: 0x%02x\n", val);
|
|
ns2501_readb(dvo, NS2501_REGC, &val);
|
|
DRM_DEBUG_KMS("NS2501_REGC: 0x%02x\n", val);
|
|
}
|
|
|
|
static void ns2501_destroy(struct intel_dvo_device *dvo)
|
|
{
|
|
struct ns2501_priv *ns = dvo->dev_priv;
|
|
|
|
if (ns) {
|
|
kfree(ns);
|
|
dvo->dev_priv = NULL;
|
|
}
|
|
}
|
|
|
|
struct intel_dvo_dev_ops ns2501_ops = {
|
|
.init = ns2501_init,
|
|
.detect = ns2501_detect,
|
|
.mode_valid = ns2501_mode_valid,
|
|
.mode_set = ns2501_mode_set,
|
|
.dpms = ns2501_dpms,
|
|
.get_hw_state = ns2501_get_hw_state,
|
|
.dump_regs = ns2501_dump_regs,
|
|
.destroy = ns2501_destroy,
|
|
};
|