mirror of https://gitee.com/openkylin/linux.git
drm/i915: Add display WA #1175 for planes ending close to right screen edge
As described in the WA on GLK and CNL planes on the right edge of the screen that have less than 4 pixels visible from the beginning of the plane to the edge of the screen can cause FIFO underflow and display corruption. On GLK/CNL I could trigger the problem only if the plane was at the same time also aligned to the top edge of the screen (after clipping) and there were exactly 2 pixels visible from the start of the plane to the right edge of the screen (so couldn't trigger it with 1 or 3 pixels visible). Nevertheless, to be sure, I also applied the WA for these cases. I also couldn't see any problem with the cursor plane and later Art confirmed that it's not affected, so the WA is applied only for the other plane types. v2: - Use -ERANGE instead of -EINVAL. (Chris) Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180116112415.22060-1-imre.deak@intel.com
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drivers/gpu/drm/i915
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@ -2931,14 +2931,19 @@ static bool skl_check_main_ccs_coordinates(struct intel_plane_state *plane_state
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return true;
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}
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static int skl_check_main_surface(struct intel_plane_state *plane_state)
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static int skl_check_main_surface(const struct intel_crtc_state *crtc_state,
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struct intel_plane_state *plane_state)
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{
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struct drm_i915_private *dev_priv =
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to_i915(plane_state->base.plane->dev);
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const struct drm_framebuffer *fb = plane_state->base.fb;
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unsigned int rotation = plane_state->base.rotation;
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int x = plane_state->base.src.x1 >> 16;
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int y = plane_state->base.src.y1 >> 16;
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int w = drm_rect_width(&plane_state->base.src) >> 16;
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int h = drm_rect_height(&plane_state->base.src) >> 16;
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int dst_x = plane_state->base.dst.x1;
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int pipe_src_w = crtc_state->pipe_src_w;
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int max_width = skl_max_plane_width(fb, 0, rotation);
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int max_height = 4096;
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u32 alignment, offset, aux_offset = plane_state->aux.offset;
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@ -2949,6 +2954,20 @@ static int skl_check_main_surface(struct intel_plane_state *plane_state)
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return -EINVAL;
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}
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/*
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* Display WA #1175: cnl,glk
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* Planes other than the cursor may cause FIFO underflow and display
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* corruption if starting less than 4 pixels from the right edge of
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* the screen.
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*/
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if ((IS_GEMINILAKE(dev_priv) || IS_CANNONLAKE(dev_priv)) &&
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dst_x > pipe_src_w - 4) {
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DRM_DEBUG_KMS("requested plane X start position %d invalid (valid range %d-%d)\n",
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dst_x,
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0, pipe_src_w - 4);
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return -ERANGE;
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}
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intel_add_fb_offsets(&x, &y, plane_state, 0);
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offset = intel_compute_tile_offset(&x, &y, plane_state, 0);
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alignment = intel_surf_alignment(fb, 0);
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@ -3073,7 +3092,8 @@ static int skl_check_ccs_aux_surface(struct intel_plane_state *plane_state)
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return 0;
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}
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int skl_check_plane_surface(struct intel_plane_state *plane_state)
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int skl_check_plane_surface(const struct intel_crtc_state *crtc_state,
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struct intel_plane_state *plane_state)
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{
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const struct drm_framebuffer *fb = plane_state->base.fb;
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unsigned int rotation = plane_state->base.rotation;
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@ -3113,7 +3133,7 @@ int skl_check_plane_surface(struct intel_plane_state *plane_state)
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plane_state->aux.y = 0;
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}
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ret = skl_check_main_surface(plane_state);
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ret = skl_check_main_surface(crtc_state, plane_state);
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if (ret)
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return ret;
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@ -12778,7 +12798,7 @@ intel_check_primary_plane(struct intel_plane *plane,
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return 0;
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if (INTEL_GEN(dev_priv) >= 9) {
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ret = skl_check_plane_surface(state);
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ret = skl_check_plane_surface(crtc_state, state);
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if (ret)
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return ret;
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@ -1507,7 +1507,8 @@ u32 skl_plane_ctl(const struct intel_crtc_state *crtc_state,
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const struct intel_plane_state *plane_state);
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u32 skl_plane_stride(const struct drm_framebuffer *fb, int plane,
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unsigned int rotation);
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int skl_check_plane_surface(struct intel_plane_state *plane_state);
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int skl_check_plane_surface(const struct intel_crtc_state *crtc_state,
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struct intel_plane_state *plane_state);
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int i9xx_check_plane_surface(struct intel_plane_state *plane_state);
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/* intel_csr.c */
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@ -1028,7 +1028,7 @@ intel_check_sprite_plane(struct intel_plane *plane,
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dst->y2 = crtc_y + crtc_h;
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if (INTEL_GEN(dev_priv) >= 9) {
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ret = skl_check_plane_surface(state);
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ret = skl_check_plane_surface(crtc_state, state);
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if (ret)
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return ret;
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