From d3accc34d793b55bf8f3f03cf5efa6b64a89b70b Mon Sep 17 00:00:00 2001 From: Maarten Lankhorst Date: Fri, 10 Nov 2017 12:34:53 +0100 Subject: [PATCH] drm/i915: Update watermark state correctly in sanitize_watermarks MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit commit 556fe36d09da5f82879e92bafa0371b4b79f7d6f upstream. We no longer use intel_crtc->wm.active for watermarks any more, which was incorrect. But this uncovered a bug in sanitize_watermarks(), which meant that we wrote the correct watermarks, but the next update would still use the wrong hw watermarks for calculating. This caused all further updates to fail with -EINVAL and the log would reveal an error like the one below: [ 10.043902] [drm:ilk_validate_wm_level.part.8 [i915]] Sprite WM0 too large 56 (max 0) [ 10.043960] [drm:ilk_validate_pipe_wm [i915]] LP0 watermark invalid [ 10.044030] [drm:intel_crtc_atomic_check [i915]] No valid intermediate pipe watermarks are possible Signed-off-by: Maarten Lankhorst Fixes: b6b178a77210 ("drm/i915: Calculate ironlake intermediate watermarks correctly, v2.") Cc: stable@vger.kernel.org #v4.8+ Link: https://patchwork.freedesktop.org/patch/msgid/20171110113503.16253-1-maarten.lankhorst@linux.intel.com Signed-off-by: Maarten Lankhorst Reviewed-by: Ville Syrjälä Signed-off-by: Greg Kroah-Hartman --- 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 059db50..cf648c5 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -14498,6 +14498,8 @@ retry: cs->wm.need_postvbl_update = true; dev_priv->display.optimize_watermarks(intel_state, cs); + + to_intel_crtc_state(crtc->state)->wm = cs->wm; } put_state: -- 2.7.4