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drm/radeon: rework panel mode setup 

Adjust the panel mode setup to match the behavior
of the vbios.  Rather than checking for specific
bridge chip ids, just check the eDP configuration register.
This saves extra aux transactions and works across
DP bridge chips without requiring additional per chip
id checking.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2012-08-27 17:48:18 -04:00
parent c205b232a6
commit 0ceb996c9e
1 changed files with 12 additions and 17 deletions
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29
drivers/gpu/drm/radeon/atombios_dp.c
View File

@ -577,30 +577,25 @@ int radeon_dp_get_panel_mode(struct drm_encoder *encoder,
struct radeon_device *rdev = dev->dev_private;
struct radeon_connector *radeon_connector = to_radeon_connector(connector);
int panel_mode = DP_PANEL_MODE_EXTERNAL_DP_MODE;
u16 dp_bridge = radeon_connector_encoder_get_dp_bridge_encoder_id(connector);
u8 tmp;
if (!ASIC_IS_DCE4(rdev))
return panel_mode;
if (radeon_connector_encoder_get_dp_bridge_encoder_id(connector) ==
ENCODER_OBJECT_ID_NUTMEG)
panel_mode = DP_PANEL_MODE_INTERNAL_DP1_MODE;
else if (radeon_connector_encoder_get_dp_bridge_encoder_id(connector) ==
ENCODER_OBJECT_ID_TRAVIS) {
u8 id[6];
int i;
for (i = 0; i < 6; i++)
id[i] = radeon_read_dpcd_reg(radeon_connector, 0x503 + i);
if (id[0] == 0x73 &&
id[1] == 0x69 &&
id[2] == 0x76 &&
id[3] == 0x61 &&
id[4] == 0x72 &&
id[5] == 0x54)
if (dp_bridge != ENCODER_OBJECT_ID_NONE) {
/* DP bridge chips */
tmp = radeon_read_dpcd_reg(radeon_connector, DP_EDP_CONFIGURATION_CAP);
if (tmp & 1)
panel_mode = DP_PANEL_MODE_INTERNAL_DP2_MODE;
else if ((dp_bridge == ENCODER_OBJECT_ID_NUTMEG) ||
(dp_bridge == ENCODER_OBJECT_ID_TRAVIS))
panel_mode = DP_PANEL_MODE_INTERNAL_DP1_MODE;
else
panel_mode = DP_PANEL_MODE_INTERNAL_DP2_MODE;
panel_mode = DP_PANEL_MODE_EXTERNAL_DP_MODE;
} else if (connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
u8 tmp = radeon_read_dpcd_reg(radeon_connector, DP_EDP_CONFIGURATION_CAP);
/* eDP */
tmp = radeon_read_dpcd_reg(radeon_connector, DP_EDP_CONFIGURATION_CAP);
if (tmp & 1)
panel_mode = DP_PANEL_MODE_INTERNAL_DP2_MODE;
}