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author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2021-01-11 17:37:02 +0100 |
---|---|---|
committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2021-01-29 17:51:01 +0100 |
commit | cb807055497c39bd657da9288ebdf07b81fc8d69 (patch) | |
tree | 644a78d0a2668df9c643135cbed8e467e55174e8 /drivers/gpu/drm/i915/display/i9xx_plane.c | |
parent | drm/i915: Rename is_16gb_dimm to wm_lv_0_adjust_needed (diff) | |
download | linux-cb807055497c39bd657da9288ebdf07b81fc8d69.tar.xz linux-cb807055497c39bd657da9288ebdf07b81fc8d69.zip |
drm/i915: Limit plane stride to below TILEOFF.x limit
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 <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210111163711.12913-3-ville.syrjala@linux.intel.com
Reviewed-by: Karthik B S <karthik.b.s@intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/display/i9xx_plane.c')
-rw-r--r-- | drivers/gpu/drm/i915/display/i9xx_plane.c | 64 |
1 files changed, 55 insertions, 9 deletions
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; |