From cb807055497c39bd657da9288ebdf07b81fc8d69 Mon Sep 17 00:00:00 2001 From: Ville Syrjälä Date: Mon, 11 Jan 2021 18:37:02 +0200 Subject: drm/i915: Limit plane stride to below TILEOFF.x limit MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Limit pre-skl plane stride to below 4k or 8k pixels (depending on the platform). We do this in order guarantee that TILEOFF/OFFSET.x does not get too big. Currently this is not a problem as we align SURF to 4k, and so TILEOFF/OFFSET only have to deal with a single tile's worth of pixels. But for async flips we're going to have to bump SURF alignment to 256k, and thus we can no longer guarantee TILEOFF/OFFSET.x will stay within acceptable bounds. We can avoid this by borrowing a trick from the skl+ code and limit the max plane stride to whatever value we can fit into TILEOFF/OFFSET.x. The slight downside is that we may end up doing GTT remapping in a few more cases where previously we did not have to. But since that will only happen with huge buffers I'm not really concerned about it. Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20210111163711.12913-3-ville.syrjala@linux.intel.com Reviewed-by: Karthik B S --- drivers/gpu/drm/i915/display/i9xx_plane.c | 64 +++++++++++++++++++++++++---- drivers/gpu/drm/i915/display/i9xx_plane.h | 2 +- drivers/gpu/drm/i915/display/intel_sprite.c | 33 ++++++++++++--- 3 files changed, 83 insertions(+), 16 deletions(-) (limited to 'drivers/gpu') diff --git a/drivers/gpu/drm/i915/display/i9xx_plane.c b/drivers/gpu/drm/i915/display/i9xx_plane.c index b1158ce4df92..7d968ca890da 100644 --- a/drivers/gpu/drm/i915/display/i9xx_plane.c +++ b/drivers/gpu/drm/i915/display/i9xx_plane.c @@ -530,21 +530,56 @@ static bool i9xx_plane_get_hw_state(struct intel_plane *plane, return ret; } +static unsigned int +hsw_primary_max_stride(struct intel_plane *plane, + u32 pixel_format, u64 modifier, + unsigned int rotation) +{ + const struct drm_format_info *info = drm_format_info(pixel_format); + int cpp = info->cpp[0]; + + /* Limit to 8k pixels to guarantee OFFSET.x doesn't get too big. */ + return min(8192 * cpp, 32 * 1024); +} + +static unsigned int +ilk_primary_max_stride(struct intel_plane *plane, + u32 pixel_format, u64 modifier, + unsigned int rotation) +{ + const struct drm_format_info *info = drm_format_info(pixel_format); + int cpp = info->cpp[0]; + + /* Limit to 4k pixels to guarantee TILEOFF.x doesn't get too big. */ + if (modifier == I915_FORMAT_MOD_X_TILED) + return min(4096 * cpp, 32 * 1024); + else + return 32 * 1024; +} + unsigned int +i965_plane_max_stride(struct intel_plane *plane, + u32 pixel_format, u64 modifier, + unsigned int rotation) +{ + const struct drm_format_info *info = drm_format_info(pixel_format); + int cpp = info->cpp[0]; + + /* Limit to 4k pixels to guarantee TILEOFF.x doesn't get too big. */ + if (modifier == I915_FORMAT_MOD_X_TILED) + return min(4096 * cpp, 16 * 1024); + else + return 32 * 1024; +} + +static unsigned int i9xx_plane_max_stride(struct intel_plane *plane, u32 pixel_format, u64 modifier, unsigned int rotation) { struct drm_i915_private *dev_priv = to_i915(plane->base.dev); - if (!HAS_GMCH(dev_priv)) { - return 32*1024; - } else if (INTEL_GEN(dev_priv) >= 4) { - if (modifier == I915_FORMAT_MOD_X_TILED) - return 16*1024; - else - return 32*1024; - } else if (INTEL_GEN(dev_priv) >= 3) { + if (INTEL_GEN(dev_priv) >= 3) { if (modifier == I915_FORMAT_MOD_X_TILED) return 8*1024; else @@ -656,7 +691,18 @@ intel_primary_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe) else plane->min_cdclk = i9xx_plane_min_cdclk; - plane->max_stride = i9xx_plane_max_stride; + if (HAS_GMCH(dev_priv)) { + if (INTEL_GEN(dev_priv) >= 4) + plane->max_stride = i965_plane_max_stride; + else + plane->max_stride = i9xx_plane_max_stride; + } else { + if (IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv)) + plane->max_stride = hsw_primary_max_stride; + else + plane->max_stride = ilk_primary_max_stride; + } + plane->update_plane = i9xx_update_plane; plane->disable_plane = i9xx_disable_plane; plane->get_hw_state = i9xx_plane_get_hw_state; diff --git a/drivers/gpu/drm/i915/display/i9xx_plane.h b/drivers/gpu/drm/i915/display/i9xx_plane.h index bc2834a62735..ca963c2a8457 100644 --- a/drivers/gpu/drm/i915/display/i9xx_plane.h +++ b/drivers/gpu/drm/i915/display/i9xx_plane.h @@ -13,7 +13,7 @@ struct drm_i915_private; struct intel_plane; struct intel_plane_state; -unsigned int i9xx_plane_max_stride(struct intel_plane *plane, +unsigned int i965_plane_max_stride(struct intel_plane *plane, u32 pixel_format, u64 modifier, unsigned int rotation); int i9xx_check_plane_surface(struct intel_plane_state *plane_state); diff --git a/drivers/gpu/drm/i915/display/intel_sprite.c b/drivers/gpu/drm/i915/display/intel_sprite.c index 465fd18a77b0..993543334a1e 100644 --- a/drivers/gpu/drm/i915/display/intel_sprite.c +++ b/drivers/gpu/drm/i915/display/intel_sprite.c @@ -1851,7 +1851,26 @@ g4x_sprite_max_stride(struct intel_plane *plane, u32 pixel_format, u64 modifier, unsigned int rotation) { - return 16384; + const struct drm_format_info *info = drm_format_info(pixel_format); + int cpp = info->cpp[0]; + + /* Limit to 4k pixels to guarantee TILEOFF.x doesn't get too big. */ + if (modifier == I915_FORMAT_MOD_X_TILED) + return min(4096 * cpp, 16 * 1024); + else + return 16 * 1024; +} + +static unsigned int +hsw_sprite_max_stride(struct intel_plane *plane, + u32 pixel_format, u64 modifier, + unsigned int rotation) +{ + const struct drm_format_info *info = drm_format_info(pixel_format); + int cpp = info->cpp[0]; + + /* Limit to 8k pixels to guarantee OFFSET.x doesn't get too big. */ + return min(8192 * cpp, 16 * 1024); } static u32 g4x_sprite_ctl_crtc(const struct intel_crtc_state *crtc_state) @@ -3408,11 +3427,11 @@ intel_sprite_plane_create(struct drm_i915_private *dev_priv, return plane; if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { - plane->max_stride = i9xx_plane_max_stride; plane->update_plane = vlv_update_plane; plane->disable_plane = vlv_disable_plane; plane->get_hw_state = vlv_plane_get_hw_state; plane->check_plane = vlv_sprite_check; + plane->max_stride = i965_plane_max_stride; plane->min_cdclk = vlv_plane_min_cdclk; if (IS_CHERRYVIEW(dev_priv) && pipe == PIPE_B) { @@ -3426,16 +3445,18 @@ intel_sprite_plane_create(struct drm_i915_private *dev_priv, plane_funcs = &vlv_sprite_funcs; } else if (INTEL_GEN(dev_priv) >= 7) { - plane->max_stride = g4x_sprite_max_stride; plane->update_plane = ivb_update_plane; plane->disable_plane = ivb_disable_plane; plane->get_hw_state = ivb_plane_get_hw_state; plane->check_plane = g4x_sprite_check; - if (IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv)) + if (IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv)) { + plane->max_stride = hsw_sprite_max_stride; plane->min_cdclk = hsw_plane_min_cdclk; - else + } else { + plane->max_stride = g4x_sprite_max_stride; plane->min_cdclk = ivb_sprite_min_cdclk; + } formats = snb_plane_formats; num_formats = ARRAY_SIZE(snb_plane_formats); @@ -3443,11 +3464,11 @@ intel_sprite_plane_create(struct drm_i915_private *dev_priv, plane_funcs = &snb_sprite_funcs; } else { - plane->max_stride = g4x_sprite_max_stride; plane->update_plane = g4x_update_plane; plane->disable_plane = g4x_disable_plane; plane->get_hw_state = g4x_plane_get_hw_state; plane->check_plane = g4x_sprite_check; + plane->max_stride = g4x_sprite_max_stride; plane->min_cdclk = g4x_sprite_min_cdclk; modifiers = i9xx_plane_format_modifiers; -- cgit v1.2.3