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| author | Mario Kleiner <mario.kleiner.de@gmail.com> | 2014-08-05 05:23:11 +0200 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2014-08-05 11:22:54 -0400 |
| commit | 9f51e2e04f74608adec9957df97684a37a4cd375 (patch) | |
| tree | c6cc6f0e063059e0a47c68719850d20527453b4c /drivers/gpu/drm/radeon/radeon_connectors.c | |
| parent | 39dc5454e33b9e76d437bef1bdc1a453a81a2fc2 (diff) | |
| download | lwn-9f51e2e04f74608adec9957df97684a37a4cd375.tar.gz lwn-9f51e2e04f74608adec9957df97684a37a4cd375.zip | |
drm/radeon: Prevent hdmi deep color if max_tmds_clock is undefined.
HDMI spec requires a valid max_tmds_clock from edid for hdmi
deep color modes. If a sink violates this, disable deep color.
Also add a hint to user about the deep_color module parameter if
deep color is disabled due to that.
Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_connectors.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_connectors.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c index 19ad4fb0a610..300c4b3d4669 100644 --- a/drivers/gpu/drm/radeon/radeon_connectors.c +++ b/drivers/gpu/drm/radeon/radeon_connectors.c @@ -197,10 +197,19 @@ int radeon_get_monitor_bpc(struct drm_connector *connector) connector->name, bpc); } } + else if (bpc > 8) { + /* max_tmds_clock missing, but hdmi spec mandates it for deep color. */ + DRM_DEBUG("%s: Required max tmds clock for HDMI deep color missing. Using 8 bpc.\n", + connector->name); + bpc = 8; + } } - if ((radeon_deep_color == 0) && (bpc > 8)) + if ((radeon_deep_color == 0) && (bpc > 8)) { + DRM_DEBUG("%s: Deep color disabled. Set radeon module param deep_color=1 to enable.\n", + connector->name); bpc = 8; + } DRM_DEBUG("%s: Display bpc=%d, returned bpc=%d\n", connector->name, connector->display_info.bpc, bpc); |