From c322c649529f9a827f09f19ab5c2fbd9361b6020 Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Tue, 16 Jan 2018 13:24:14 +0200 Subject: [PATCH] drm/i915: Add display WA #1175 for planes ending close to right screen edge MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Reviewed-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20180116112415.22060-1-imre.deak@intel.com --- drivers/gpu/drm/i915/intel_display.c | 28 ++++++++++++++++++++++++---- drivers/gpu/drm/i915/intel_drv.h | 3 ++- drivers/gpu/drm/i915/intel_sprite.c | 2 +- 3 files changed, 27 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index f9372a21e326..eba716e6a7a7 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -2931,14 +2931,19 @@ static bool skl_check_main_ccs_coordinates(struct intel_plane_state *plane_state return true; } -static int skl_check_main_surface(struct intel_plane_state *plane_state) +static int skl_check_main_surface(const struct intel_crtc_state *crtc_state, + struct intel_plane_state *plane_state) { + struct drm_i915_private *dev_priv = + to_i915(plane_state->base.plane->dev); const struct drm_framebuffer *fb = plane_state->base.fb; unsigned int rotation = plane_state->base.rotation; int x = plane_state->base.src.x1 >> 16; int y = plane_state->base.src.y1 >> 16; int w = drm_rect_width(&plane_state->base.src) >> 16; int h = drm_rect_height(&plane_state->base.src) >> 16; + int dst_x = plane_state->base.dst.x1; + int pipe_src_w = crtc_state->pipe_src_w; int max_width = skl_max_plane_width(fb, 0, rotation); int max_height = 4096; u32 alignment, offset, aux_offset = plane_state->aux.offset; @@ -2949,6 +2954,20 @@ static int skl_check_main_surface(struct intel_plane_state *plane_state) return -EINVAL; } + /* + * Display WA #1175: cnl,glk + * Planes other than the cursor may cause FIFO underflow and display + * corruption if starting less than 4 pixels from the right edge of + * the screen. + */ + if ((IS_GEMINILAKE(dev_priv) || IS_CANNONLAKE(dev_priv)) && + dst_x > pipe_src_w - 4) { + DRM_DEBUG_KMS("requested plane X start position %d invalid (valid range %d-%d)\n", + dst_x, + 0, pipe_src_w - 4); + return -ERANGE; + } + intel_add_fb_offsets(&x, &y, plane_state, 0); offset = intel_compute_tile_offset(&x, &y, plane_state, 0); alignment = intel_surf_alignment(fb, 0); @@ -3073,7 +3092,8 @@ static int skl_check_ccs_aux_surface(struct intel_plane_state *plane_state) return 0; } -int skl_check_plane_surface(struct intel_plane_state *plane_state) +int skl_check_plane_surface(const struct intel_crtc_state *crtc_state, + struct intel_plane_state *plane_state) { const struct drm_framebuffer *fb = plane_state->base.fb; unsigned int rotation = plane_state->base.rotation; @@ -3113,7 +3133,7 @@ int skl_check_plane_surface(struct intel_plane_state *plane_state) plane_state->aux.y = 0; } - ret = skl_check_main_surface(plane_state); + ret = skl_check_main_surface(crtc_state, plane_state); if (ret) return ret; @@ -12778,7 +12798,7 @@ intel_check_primary_plane(struct intel_plane *plane, return 0; if (INTEL_GEN(dev_priv) >= 9) { - ret = skl_check_plane_surface(state); + ret = skl_check_plane_surface(crtc_state, state); if (ret) return ret; diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index bb849b55548c..1695b2a76c13 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -1507,7 +1507,8 @@ u32 skl_plane_ctl(const struct intel_crtc_state *crtc_state, const struct intel_plane_state *plane_state); u32 skl_plane_stride(const struct drm_framebuffer *fb, int plane, unsigned int rotation); -int skl_check_plane_surface(struct intel_plane_state *plane_state); +int skl_check_plane_surface(const struct intel_crtc_state *crtc_state, + struct intel_plane_state *plane_state); int i9xx_check_plane_surface(struct intel_plane_state *plane_state); /* intel_csr.c */ diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c index e4e4a1cbdd47..630d20eecf3c 100644 --- a/drivers/gpu/drm/i915/intel_sprite.c +++ b/drivers/gpu/drm/i915/intel_sprite.c @@ -1028,7 +1028,7 @@ intel_check_sprite_plane(struct intel_plane *plane, dst->y2 = crtc_y + crtc_h; if (INTEL_GEN(dev_priv) >= 9) { - ret = skl_check_plane_surface(state); + ret = skl_check_plane_surface(crtc_state, state); if (ret) return ret; -- 2.11.0