This is a note to let you know that I've just added the patch titled
drm/i915: Fix scaling check for 90/270 degree plane rotation
to the 4.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-i915-fix-scaling-check-for-90-270-degree-plane-rotation.patch
and it can be found in the queue-4.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 9a775e0308b575e3a17c66a586ed049b07f48199 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@xxxxxxxxxxxxxxx>
Date: Thu, 8 Jun 2017 17:40:01 +0300
Subject: drm/i915: Fix scaling check for 90/270 degree plane rotation
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From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
commit 9a775e0308b575e3a17c66a586ed049b07f48199 upstream.
Starting from commit b63a16f6cd89 ("drm/i915: Compute display surface
offset in the plane check hook for SKL+") we've already rotated the src
coordinates by 270 degrees by the time we check if a scaler is needed
or not, so we must not account for the rotation a second time.
Previously we did these steps in the opposite order and hence the
scaler check had to deal with rotation itself. The double rotation
handling causes us to enable a scaler pretty much every time 90/270
degree plane rotation is requested, leading to fuzzier fonts and whatnot.
v2: s/unsigned/unsigned int/ to appease checkpatch
v3: s/DRM_ROTATE_0/DRM_MODE_ROTATE_0/
Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Reported-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Tested-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Fixes: b63a16f6cd89 ("drm/i915: Compute display surface offset in the plane check hook for SKL+")
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Link: http://patchwork.freedesktop.org/patch/msgid/20170331180056.14086-2-ville.syrjala@xxxxxxxxxxxxxxx
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
(cherry picked from commit d96a7d2adb040a67e163a82dad6316f9f572498a)
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Link: http://patchwork.freedesktop.org/patch/msgid/20170608144002.1605-1-ville.syrjala@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_display.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4633,7 +4633,7 @@ static void cpt_verify_modeset(struct dr
static int
skl_update_scaler(struct intel_crtc_state *crtc_state, bool force_detach,
- unsigned scaler_user, int *scaler_id, unsigned int rotation,
+ unsigned int scaler_user, int *scaler_id,
int src_w, int src_h, int dst_w, int dst_h)
{
struct intel_crtc_scaler_state *scaler_state =
@@ -4642,9 +4642,12 @@ skl_update_scaler(struct intel_crtc_stat
to_intel_crtc(crtc_state->base.crtc);
int need_scaling;
- need_scaling = drm_rotation_90_or_270(rotation) ?
- (src_h != dst_w || src_w != dst_h):
- (src_w != dst_w || src_h != dst_h);
+ /*
+ * Src coordinates are already rotated by 270 degrees for
+ * the 90/270 degree plane rotation cases (to match the
+ * GTT mapping), hence no need to account for rotation here.
+ */
+ need_scaling = src_w != dst_w || src_h != dst_h;
/*
* if plane is being disabled or scaler is no more required or force detach
@@ -4706,7 +4709,7 @@ int skl_update_scaler_crtc(struct intel_
const struct drm_display_mode *adjusted_mode = &state->base.adjusted_mode;
return skl_update_scaler(state, !state->base.active, SKL_CRTC_INDEX,
- &state->scaler_state.scaler_id, DRM_ROTATE_0,
+ &state->scaler_state.scaler_id,
state->pipe_src_w, state->pipe_src_h,
adjusted_mode->crtc_hdisplay, adjusted_mode->crtc_vdisplay);
}
@@ -4735,7 +4738,6 @@ static int skl_update_scaler_plane(struc
ret = skl_update_scaler(crtc_state, force_detach,
drm_plane_index(&intel_plane->base),
&plane_state->scaler_id,
- plane_state->base.rotation,
drm_rect_width(&plane_state->base.src) >> 16,
drm_rect_height(&plane_state->base.src) >> 16,
drm_rect_width(&plane_state->base.dst),
Patches currently in stable-queue which might be from ville.syrjala@xxxxxxxxxxxxxxx are
queue-4.11/drm-i915-fix-scaling-check-for-90-270-degree-plane-rotation.patch