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drm/nouveau: Implement nv42-nv43 TV load detection. 

Signed-off-by: Francisco Jerez <currojerez@riseup.net>
This commit is contained in:
Francisco Jerez 2009-12-17 18:57:44 +01:00 committed by Ben Skeggs
parent 11d6eb2af5
commit 0829168b47
1 changed files with 89 additions and 1 deletions
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90
drivers/gpu/drm/nouveau/nv17_tv.c
View File

@ -33,15 +33,103 @@
#include "nouveau_hw.h"
#include "nv17_tv.h"
static uint32_t nv42_tv_sample_load(struct drm_encoder *encoder)
{
struct drm_device *dev = encoder->dev;
struct drm_nouveau_private *dev_priv = dev->dev_private;
uint32_t testval, regoffset = nv04_dac_output_offset(encoder);
uint32_t gpio0, gpio1, fp_htotal, fp_hsync_start, fp_hsync_end,
fp_control, test_ctrl, dacclk, ctv_14, ctv_1c, ctv_6c;
uint32_t sample = 0;
int head;
#define RGB_TEST_DATA(r, g, b) (r << 0 | g << 10 | b << 20)
testval = RGB_TEST_DATA(0x82, 0xeb, 0x82);
if (dev_priv->vbios->tvdactestval)
testval = dev_priv->vbios->tvdactestval;
dacclk = NVReadRAMDAC(dev, 0, NV_PRAMDAC_DACCLK + regoffset);
head = (dacclk & 0x100) >> 8;
/* Save the previous state. */
gpio1 = nv17_gpio_get(dev, DCB_GPIO_TVDAC1);
gpio0 = nv17_gpio_get(dev, DCB_GPIO_TVDAC0);
fp_htotal = NVReadRAMDAC(dev, head, NV_PRAMDAC_FP_HTOTAL);
fp_hsync_start = NVReadRAMDAC(dev, head, NV_PRAMDAC_FP_HSYNC_START);
fp_hsync_end = NVReadRAMDAC(dev, head, NV_PRAMDAC_FP_HSYNC_END);
fp_control = NVReadRAMDAC(dev, head, NV_PRAMDAC_FP_TG_CONTROL);
test_ctrl = NVReadRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + regoffset);
ctv_1c = NVReadRAMDAC(dev, head, 0x680c1c);
ctv_14 = NVReadRAMDAC(dev, head, 0x680c14);
ctv_6c = NVReadRAMDAC(dev, head, 0x680c6c);
/* Prepare the DAC for load detection. */
nv17_gpio_set(dev, DCB_GPIO_TVDAC1, true);
nv17_gpio_set(dev, DCB_GPIO_TVDAC0, true);
NVWriteRAMDAC(dev, head, NV_PRAMDAC_FP_HTOTAL, 1343);
NVWriteRAMDAC(dev, head, NV_PRAMDAC_FP_HSYNC_START, 1047);
NVWriteRAMDAC(dev, head, NV_PRAMDAC_FP_HSYNC_END, 1183);
NVWriteRAMDAC(dev, head, NV_PRAMDAC_FP_TG_CONTROL,
NV_PRAMDAC_FP_TG_CONTROL_DISPEN_POS |
NV_PRAMDAC_FP_TG_CONTROL_WIDTH_12 |
NV_PRAMDAC_FP_TG_CONTROL_READ_PROG |
NV_PRAMDAC_FP_TG_CONTROL_HSYNC_POS |
NV_PRAMDAC_FP_TG_CONTROL_VSYNC_POS);
NVWriteRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + regoffset, 0);
NVWriteRAMDAC(dev, 0, NV_PRAMDAC_DACCLK + regoffset,
(dacclk & ~0xff) | 0x22);
msleep(1);
NVWriteRAMDAC(dev, 0, NV_PRAMDAC_DACCLK + regoffset,
(dacclk & ~0xff) | 0x21);
NVWriteRAMDAC(dev, head, 0x680c1c, 1 << 20);
NVWriteRAMDAC(dev, head, 0x680c14, 4 << 16);
/* Sample pin 0x4 (usually S-video luma). */
NVWriteRAMDAC(dev, head, 0x680c6c, testval >> 10 & 0x3ff);
msleep(20);
sample |= NVReadRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + regoffset)
& 0x4 << 28;
/* Sample the remaining pins. */
NVWriteRAMDAC(dev, head, 0x680c6c, testval & 0x3ff);
msleep(20);
sample |= NVReadRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + regoffset)
& 0xa << 28;
/* Restore the previous state. */
NVWriteRAMDAC(dev, head, 0x680c1c, ctv_1c);
NVWriteRAMDAC(dev, head, 0x680c14, ctv_14);
NVWriteRAMDAC(dev, head, 0x680c6c, ctv_6c);
NVWriteRAMDAC(dev, 0, NV_PRAMDAC_DACCLK + regoffset, dacclk);
NVWriteRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + regoffset, test_ctrl);
NVWriteRAMDAC(dev, head, NV_PRAMDAC_FP_TG_CONTROL, fp_control);
NVWriteRAMDAC(dev, head, NV_PRAMDAC_FP_HSYNC_END, fp_hsync_end);
NVWriteRAMDAC(dev, head, NV_PRAMDAC_FP_HSYNC_START, fp_hsync_start);
NVWriteRAMDAC(dev, head, NV_PRAMDAC_FP_HTOTAL, fp_htotal);
nv17_gpio_set(dev, DCB_GPIO_TVDAC1, gpio1);
nv17_gpio_set(dev, DCB_GPIO_TVDAC0, gpio0);
return sample;
}
static enum drm_connector_status
nv17_tv_detect(struct drm_encoder *encoder, struct drm_connector *connector)
{
struct drm_device *dev = encoder->dev;
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct drm_mode_config *conf = &dev->mode_config;
struct nv17_tv_encoder *tv_enc = to_tv_enc(encoder);
struct dcb_entry *dcb = tv_enc->base.dcb;
tv_enc->pin_mask = nv17_dac_sample_load(encoder) >> 28 & 0xe;
if (dev_priv->chipset == 0x42 ||
dev_priv->chipset == 0x43)
tv_enc->pin_mask = nv42_tv_sample_load(encoder) >> 28 & 0xe;
else
tv_enc->pin_mask = nv17_dac_sample_load(encoder) >> 28 & 0xe;
switch (tv_enc->pin_mask) {
case 0x2: