hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

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>
This commit is contained in:
Mario Kleiner 2014-08-05 05:23:11 +02:00 committed by Alex Deucher
parent 39dc5454e3
commit 9f51e2e04f
1 changed files with 10 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/gpu/drm/radeon/radeon_connectors.c
View File

@ -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);