From: Daniel Vetter Date: Mon, 3 Mar 2014 10:18:10 +0000 (+0100) Subject: drm/i915: reverse dp link param selection, prefer fast over wide again X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=38aecea0ccbb909d635619cba22f1891e589b434;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git drm/i915: reverse dp link param selection, prefer fast over wide again ... it's this time of the year again. Originally we've frobbed this to fix up some regressions, but maybe our DP code improved sufficiently now that we can dare to do again what the spec recommends. This reverts commit 2514bc510d0c3aadcc5204056bb440fa36845147 Author: Jesse Barnes Date: Thu Jun 21 15:13:50 2012 -0700 drm/i915: prefer wide & slow to fast & narrow in DP configs I'm pretty sure I'll regret this patch, but otoh I expect we won't make progress here without poking the devil occasionally. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=73694 Cc: peter@colberg.org Cc: Jesse Barnes Tested-by: Itai BEN YAACOV Tested-by: David En Reported-and-Tested-by: Marcus Bergner Reviewed-by: Jani Nikula Acked-by: Jesse Barnes Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 10154ec77b98..62e8efedce52 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -909,8 +909,8 @@ intel_dp_compute_config(struct intel_encoder *encoder, mode_rate = intel_dp_link_required(adjusted_mode->crtc_clock, bpp); - for (clock = 0; clock <= max_clock; clock++) { - for (lane_count = 1; lane_count <= max_lane_count; lane_count <<= 1) { + for (lane_count = 1; lane_count <= max_lane_count; lane_count <<= 1) { + for (clock = 0; clock <= max_clock; clock++) { link_clock = drm_dp_bw_code_to_link_rate(bws[clock]); link_avail = intel_dp_max_data_rate(link_clock, lane_count);