From: Jerome Glisse Date: Wed, 26 Jan 2011 22:51:03 +0000 (-0500) Subject: radeon/kms: fix dp displayport mode validation X-Git-Tag: v2.6.33.8~163 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=df00c3d5194963ac1bcd7a234d98681a46e1148a;p=karo-tx-linux.git radeon/kms: fix dp displayport mode validation commit 6bba2e116808ca12e30c8d88dfedabf8b8d67390 upstream. Check if there is a big enough dp clock & enough dp lane to drive the video mode provided. Signed-off-by: Jerome Glisse Reviewed-By: Alex Deucher Signed-off-by: Dave Airlie Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c index 99915a682d59..8aa5d932e946 100644 --- a/drivers/gpu/drm/radeon/atombios_dp.c +++ b/drivers/gpu/drm/radeon/atombios_dp.c @@ -187,9 +187,9 @@ static int dp_link_clock_for_mode_clock(u8 dpcd[DP_DPCD_SIZE], int mode_clock) int dp_mode_valid(u8 dpcd[DP_DPCD_SIZE], int mode_clock) { int lanes = dp_lanes_for_mode_clock(dpcd, mode_clock); - int bw = dp_lanes_for_mode_clock(dpcd, mode_clock); + int dp_clock = dp_link_clock_for_mode_clock(dpcd, mode_clock); - if ((lanes == 0) || (bw == 0)) + if ((lanes == 0) || (dp_clock == 0)) return MODE_CLOCK_HIGH; return MODE_OK;