drm/i915: Force explicit bpp selection for intel_dp_link_required

[linux-flexiantxendom0.git] / drivers / gpu / drm / i915 / intel_dp.c

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index db3b461..94f860c 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -208,17 +208,8 @@ intel_dp_link_clock(uint8_t link_bw)
  */
 
 static int
-intel_dp_link_required(struct intel_dp *intel_dp, int pixel_clock, int check_bpp)
+intel_dp_link_required(int pixel_clock, int bpp)
 {
-       struct drm_crtc *crtc = intel_dp->base.base.crtc;
-       struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
-       int bpp = 24;
-
-       if (check_bpp)
-               bpp = check_bpp;
-       else if (intel_crtc)
-               bpp = intel_crtc->bpp;
-
        return (pixel_clock * bpp + 9) / 10;
 }
 
@@ -245,12 +236,11 @@ intel_dp_mode_valid(struct drm_connector *connector,
                        return MODE_PANEL;
        }
 
-       mode_rate = intel_dp_link_required(intel_dp, mode->clock, 0);
+       mode_rate = intel_dp_link_required(mode->clock, 24);
        max_rate = intel_dp_max_data_rate(max_link_clock, max_lanes);
 
        if (mode_rate > max_rate) {
-                       mode_rate = intel_dp_link_required(intel_dp,
-                                                          mode->clock, 18);
+                       mode_rate = intel_dp_link_required(mode->clock, 18);
                        if (mode_rate > max_rate)
                                return MODE_CLOCK_HIGH;
                        else
@@ -683,7 +673,7 @@ intel_dp_mode_fixup(struct drm_encoder *encoder, struct drm_display_mode *mode,
        int lane_count, clock;
        int max_lane_count = intel_dp_max_lane_count(intel_dp);
        int max_clock = intel_dp_max_link_bw(intel_dp) == DP_LINK_BW_2_7 ? 1 : 0;
-       int bpp = mode->private_flags & INTEL_MODE_DP_FORCE_6BPC ? 18 : 0;
+       int bpp = mode->private_flags & INTEL_MODE_DP_FORCE_6BPC ? 18 : 24;
        static int bws[2] = { DP_LINK_BW_1_62, DP_LINK_BW_2_7 };
 
        if (is_edp(intel_dp) && intel_dp->panel_fixed_mode) {
@@ -701,7 +691,7 @@ intel_dp_mode_fixup(struct drm_encoder *encoder, struct drm_display_mode *mode,
                for (clock = 0; clock <= max_clock; clock++) {
                        int link_avail = intel_dp_max_data_rate(intel_dp_link_clock(bws[clock]), lane_count);
 
-                       if (intel_dp_link_required(intel_dp, mode->clock, bpp)
+                       if (intel_dp_link_required(mode->clock, bpp)
                                        <= link_avail) {
                                intel_dp->link_bw = bws[clock];
                                intel_dp->lane_count = lane_count;