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drm/radeon/kms: add primary dac adj values table 

Look up primary dac adj values from the table if
there is no bios or bios dac table to reference.

The lookup table may need to be adjusted for certain
families.

Should fix kernel bug 14945.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Alex Deucher 2009-12-29 12:09:17 -05:00 committed by Dave Airlie
parent b9597a1c6f
commit 246263ccc3
1 changed files with 41 additions and 9 deletions
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50
drivers/gpu/drm/radeon/radeon_combios.c
View File

@ -595,6 +595,34 @@ bool radeon_combios_get_clock_info(struct drm_device *dev)
return false;
}
static const uint32_t default_primarydac_adj[CHIP_LAST] = {
0x00000808, /* r100 */
0x00000808, /* rv100 */
0x00000808, /* rs100 */
0x00000808, /* rv200 */
0x00000808, /* rs200 */
0x00000808, /* r200 */
0x00000808, /* rv250 */
0x00000000, /* rs300 */
0x00000808, /* rv280 */
0x00000808, /* r300 */
0x00000808, /* r350 */
0x00000808, /* rv350 */
0x00000808, /* rv380 */
0x00000808, /* r420 */
0x00000808, /* r423 */
0x00000808, /* rv410 */
0x00000000, /* rs400 */
0x00000000, /* rs480 */
};
static void radeon_legacy_get_primary_dac_info_from_table(struct radeon_device *rdev,
struct radeon_encoder_primary_dac *p_dac)
{
p_dac->ps2_pdac_adj = default_primarydac_adj[rdev->family];
return;
}
struct radeon_encoder_primary_dac *radeon_combios_get_primary_dac_info(struct
radeon_encoder
*encoder)
@ -604,20 +632,20 @@ struct radeon_encoder_primary_dac *radeon_combios_get_primary_dac_info(struct
uint16_t dac_info;
uint8_t rev, bg, dac;
struct radeon_encoder_primary_dac *p_dac = NULL;
int found = 0;
p_dac = kzalloc(sizeof(struct radeon_encoder_primary_dac),
GFP_KERNEL);
if (!p_dac)
return NULL;
if (rdev->bios == NULL)
return NULL;
goto out;
/* check CRT table */
dac_info = combios_get_table_offset(dev, COMBIOS_CRT_INFO_TABLE);
if (dac_info) {
p_dac =
kzalloc(sizeof(struct radeon_encoder_primary_dac),
GFP_KERNEL);
if (!p_dac)
return NULL;
rev = RBIOS8(dac_info) & 0x3;
if (rev < 2) {
bg = RBIOS8(dac_info + 0x2) & 0xf;
@ -628,9 +656,13 @@ struct radeon_encoder_primary_dac *radeon_combios_get_primary_dac_info(struct
dac = RBIOS8(dac_info + 0x3) & 0xf;
p_dac->ps2_pdac_adj = (bg << 8) | (dac);
}
found = 1;
}
out:
if (!found) /* fallback to defaults */
radeon_legacy_get_primary_dac_info_from_table(rdev, p_dac);
return p_dac;
}