[Intel-gfx] [PATCH 1/2] drm/i915: fixed EDID/sink-based bpp clamping

[Daniel Vetter]

Since this is run in the compute config stage we need to check
the new_ pointers, not the current modeset layout. Also there
was a little logic bug in properly skipping connectors. This has
been broken when moving the pipe bpp selection in

commit 4e53c2e010e531b4a014692199e978482d471c7e
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Wed Mar 27 00:44:58 2013 +0100

    drm/i915: precompute pipe bpp before touching the hw

To avoid too much casting switch from drm_ to intel_ types.

Also add a bit of debug output to help reconstructing what's going
on.

Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
 drivers/gpu/drm/i915/intel_display.c | 28 +++++++++++++++++-----------
 1 file changed, 17 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index f410ede..3f24d7f 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -7568,12 +7568,12 @@ static void intel_modeset_commit_output_state(struct drm_device *dev)
 }
 
 static int
-pipe_config_set_bpp(struct drm_crtc *crtc,
+pipe_config_set_bpp(struct intel_crtc *crtc,
 		    struct drm_framebuffer *fb,
 		    struct intel_crtc_config *pipe_config)
 {
-	struct drm_device *dev = crtc->dev;
-	struct drm_connector *connector;
+	struct drm_device *dev = crtc->base.dev;
+	struct intel_connector *connector;
 	int bpp;
 
 	switch (fb->pixel_format) {
@@ -7616,20 +7616,25 @@ pipe_config_set_bpp(struct drm_crtc *crtc,
 
 	/* Clamp display bpp to EDID value */
 	list_for_each_entry(connector, &dev->mode_config.connector_list,
-			    head) {
-		if (connector->encoder && connector->encoder->crtc != crtc)
+			    base.head) {
+		if (!connector->new_encoder ||
+		    connector->new_encoder->new_crtc != crtc)
 			continue;
 
+		DRM_DEBUG_KMS("[CONNECTOR:%d:%s] checking for sink bpp constrains\n",
+			connector->base.base.id,
+			drm_get_connector_name(&connector->base));
+
 		/* Don't use an invalid EDID bpc value */
-		if (connector->display_info.bpc &&
-		    connector->display_info.bpc * 3 < bpp) {
+		if (connector->base.display_info.bpc &&
+		    connector->base.display_info.bpc * 3 < bpp) {
 			DRM_DEBUG_KMS("clamping display bpp (was %d) to EDID reported max of %d\n",
-				      bpp, connector->display_info.bpc*3);
-			pipe_config->pipe_bpp = connector->display_info.bpc*3;
+				      bpp, connector->base.display_info.bpc*3);
+			pipe_config->pipe_bpp = connector->base.display_info.bpc*3;
 		}
 
 		/* Clamp bpp to 8 on screens without EDID 1.4 */
-		if (connector->display_info.bpc == 0 && bpp > 24) {
+		if (connector->base.display_info.bpc == 0 && bpp > 24) {
 			DRM_DEBUG_KMS("clamping display bpp (was %d) to default limit of 24\n",
 				      bpp);
 			pipe_config->pipe_bpp = 24;
@@ -7714,7 +7719,8 @@ intel_modeset_pipe_config(struct drm_crtc *crtc,
 	pipe_config->cpu_transcoder = to_intel_crtc(crtc)->pipe;
 	pipe_config->shared_dpll = DPLL_ID_PRIVATE;
 
-	plane_bpp = pipe_config_set_bpp(crtc, fb, pipe_config);
+	plane_bpp = pipe_config_set_bpp(to_intel_crtc(crtc),
+					fb, pipe_config);
 	if (plane_bpp < 0)
 		goto fail;
 
-- 
1.7.11.7