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>
diff --git a/drivers/gpu/drm/radeon/radeon_combios.c b/drivers/gpu/drm/radeon/radeon_combios.c
index fd94dbc..58f3426 100644
--- a/drivers/gpu/drm/radeon/radeon_combios.c
+++ b/drivers/gpu/drm/radeon/radeon_combios.c
@@ -595,6 +595,34 @@
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 @@
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 @@
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;
}