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drm/radeon/kms: improve bpc handling (v2)

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Improve handling of bpc (bits per color) in radeon.
In most cases we want 8 except for HDMI, DP, LVDS, and eDP.

v2: handle DP better.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Tested-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Alex Deucher
2012-03-26 15:12:54 -04:00
committed by Dave Airlie
parent 9923777dff
commit eccea7920c
5 changed files with 63 additions and 12 deletions
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7
drivers/gpu/drm/radeon/atombios_dp.c
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@@ -405,13 +405,10 @@ static void dp_get_adjust_train(u8 link_status[DP_LINK_STATUS_SIZE],
/* get bpc from the EDID */
static int convert_bpc_to_bpp(int bpc)
{
#if 0
if (bpc == 0)
return 24;
else
return bpc * 3;
#endif
return 24;
}
/* get the max pix clock supported by the link rate and lane num */
@@ -463,7 +460,7 @@ static int radeon_dp_get_dp_lane_number(struct drm_connector *connector,
u8 dpcd[DP_DPCD_SIZE],
int pix_clock)
{
int bpp = convert_bpc_to_bpp(connector->display_info.bpc);
int bpp = convert_bpc_to_bpp(radeon_get_monitor_bpc(connector));
int max_link_rate = dp_get_max_link_rate(dpcd);
int max_lane_num = dp_get_max_lane_number(dpcd);
int lane_num;
@@ -482,7 +479,7 @@ static int radeon_dp_get_dp_link_clock(struct drm_connector *connector,
u8 dpcd[DP_DPCD_SIZE],
int pix_clock)
{
int bpp = convert_bpc_to_bpp(connector->display_info.bpc);
int bpp = convert_bpc_to_bpp(radeon_get_monitor_bpc(connector));
int lane_num, max_pix_clock;
if (radeon_connector_encoder_get_dp_bridge_encoder_id(connector) ==