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| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2021-02-09 04:19:16 +0200 |
|---|---|---|
| committer | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2021-02-17 06:18:15 -0500 |
| commit | 80cf9a88296c53bdbb1162d93d8640c8b2f58000 (patch) | |
| tree | ec3348b3cc045fbd277b3cb7dd0e32429c4f8ba8 /drivers/gpu/drm/i915/display/intel_display.c | |
| parent | 7a6c6243b44a439bda4bf099032be35ebcf53406 (diff) | |
| download | linux-80cf9a88296c53bdbb1162d93d8640c8b2f58000.tar.bz2 | |
drm/i915: Disallow plane x+w>stride on ilk+ with X-tiling
ilk+ planes get notably unhappy when the plane x+w exceeds
the stride. This wasn't a problem previously because we
always aligned SURF to the closest tile boundary so the
x offset never got particularly large. But now with async
flips we have to align to 256KiB instead and thus this
becomes a real issue.
On ilk/snb/ivb it looks like the accesses just wrap
early to the next tile row when scanout goes past the
SURF+n*stride boundary, hsw/bdw suffer more heavily and
start to underrun constantly. i965/g4x appear to be immune.
vlv/chv I've not yet checked.
Let's borrow another trick from the skl+ code and search
backwards for a better SURF offset in the hopes of getting the
x offset below the limit. IIRC when I ran into a similar issue
on skl years ago it was causing the hardware to fall over
pretty hard as well.
And let's be consistent and include i965/g4x in the check
as well, just in case I just got super lucky somehow when
I wasn't able to reproduce the issue. Not that it really
matters since we still use 4k SURF alignment for i965/g4x
anyway.
Fixes: 6ede6b0616b2 ("drm/i915: Implement async flips for vlv/chv")
Fixes: 4bb18054adc4 ("drm/i915: Implement async flip for ilk/snb")
Fixes: 2a636e240c77 ("drm/i915: Implement async flip for ivb/hsw")
Fixes: cda195f13abd ("drm/i915: Implement async flips for bdw")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210209021918.16234-1-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
(cherry picked from commit 59fb8218c8e5001f854e7d5fdb5fb135cba58102)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
[Rodrigo also exported some functions from intel_display.c during backport]
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_display.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_display.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index 9843a0f202a0..7ea1e5b487b6 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -1322,8 +1322,8 @@ static bool has_async_flips(struct drm_i915_private *i915) return INTEL_GEN(i915) >= 5; } -static unsigned int intel_surf_alignment(const struct drm_framebuffer *fb, - int color_plane) +unsigned int intel_surf_alignment(const struct drm_framebuffer *fb, + int color_plane) { struct drm_i915_private *dev_priv = to_i915(fb->dev); @@ -1590,10 +1590,10 @@ static u32 intel_adjust_aligned_offset(int *x, int *y, * Adjust the tile offset by moving the difference into * the x/y offsets. */ -static u32 intel_plane_adjust_aligned_offset(int *x, int *y, - const struct intel_plane_state *state, - int color_plane, - u32 old_offset, u32 new_offset) +u32 intel_plane_adjust_aligned_offset(int *x, int *y, + const struct intel_plane_state *state, + int color_plane, + u32 old_offset, u32 new_offset) { return intel_adjust_aligned_offset(x, y, state->hw.fb, color_plane, state->hw.rotation, |