From 4c0b8a8bc49c477be9467f614b6b4ec479736019 Mon Sep 17 00:00:00 2001 From: Paulo Zanoni Date: Fri, 19 Aug 2016 19:03:23 -0300 Subject: [PATCH] drm/i915: don't forget to set intel_crtc->dspaddr_offset on SKL+ MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit We never remembered to set it (so it was zero), but this was not a problem in the past due to the way handled the hardware registers. Unfortunately we changed how we set the hardware and forgot to set intel_crtc->dspaddr_offset. This started to reflect on a few kms_frontbuffer_tracking subtests that relied on page flips with CRTCs that don't point to the x:0,y:0 coordinates of the frontbuffer. After the page flip the CRTC was showing the x:0,y:0 coordinate of the frontbuffer instead of x:500,y:500. This problem is present even if we don't enable FBC or PSR. While trying to bisect it I realized that the first bad commit actually just gives me a black screen for the mentioned tests instead of showing the wrong x:0,y:0 offsets. A few commits later the black screen problem goes away and we get to the point where the code is today, but I'll consider the black screen as the first bad commit since it's the point where the IGT subtests start to fail. Fixes: 6687c9062c46 ("drm/i915: Rewrite fb rotation GTT handling") Testcase: kms_frontbuffer_tracking/fbc-1p-primscrn-shrfb-pgflip-blt Testcase: kms_frontbuffer_tracking/fbc-1p-primscrn-shrfb-evflip-blt Testcase: kms_frontbuffer_tracking/fbc-1p-shrfb-fliptrack Cc: Ville Syrjälä Cc: Sivakumar Thulasimani Cc: drm-intel-fixes@lists.freedesktop.org Signed-off-by: Paulo Zanoni Reviewed-by: Ville Syrjälä Link: http://patchwork.freedesktop.org/patch/msgid/1471644203-23463-1-git-send-email-paulo.r.zanoni@intel.com --- drivers/gpu/drm/i915/intel_display.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index f7b2f8f609e7..4775c06f4474 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -3408,6 +3408,8 @@ static void skylake_update_primary_plane(struct drm_plane *plane, dst_w--; dst_h--; + intel_crtc->dspaddr_offset = surf_addr; + intel_crtc->adjusted_x = src_x; intel_crtc->adjusted_y = src_y; -- 2.20.1