Currently we don't support anything but X tiled. And for an easier transition it makes a lot of sense to just keep requiring that X tiled is properly fenced.
Which means we need to do absolutely nothing in old code to support fb modifiers, yay! v2: Fix the Y tiling check, noticed by Tvrtko. v3: Catch Y-tiled fb for legacy addfb again (Tvrtko) and explain why we want X tiling to match in the comment. Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com> Signed-off-by: Daniel Vetter <daniel.vetter at intel.com> --- drivers/gpu/drm/i915/intel_display.c | 28 +++++++++++++++++++++++----- 1 file changed, 23 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 2655b63d65e9..da827568671e 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -12706,7 +12706,24 @@ static int intel_framebuffer_init(struct drm_device *dev, WARN_ON(!mutex_is_locked(&dev->struct_mutex)); - if (obj->tiling_mode == I915_TILING_Y) { + if (mode_cmd->flags & DRM_MODE_FB_MODIFIERS) { + /* Enforce that fb modifier and tiling mode match, but only for + * X-tiled. This is needed for FBC. */ + if (!!(obj->tiling_mode == I915_TILING_X) != + !!(mode_cmd->modifier[0] == I915_FORMAT_MOD_X_TILED)) { + DRM_DEBUG("tiling_mode doesn't match fb modifier\n"); + return -EINVAL; + } + } else { + if (obj->tiling_mode == I915_TILING_X) + mode_cmd->modifier[0] = I915_FORMAT_MOD_X_TILED; + else if (obj->tiling_mode == I915_TILING_Y) { + DRM_DEBUG("No Y tiling for legacy addfb\n"); + return -EINVAL; + } + } + + if (mode_cmd->modifier[0] == I915_FORMAT_MOD_Y_TILED) { DRM_DEBUG("hardware does not support tiling Y\n"); return -EINVAL; } @@ -12720,12 +12737,12 @@ static int intel_framebuffer_init(struct drm_device *dev, if (INTEL_INFO(dev)->gen >= 5 && !IS_VALLEYVIEW(dev)) { pitch_limit = 32*1024; } else if (INTEL_INFO(dev)->gen >= 4) { - if (obj->tiling_mode) + if (mode_cmd->modifier[0] == I915_FORMAT_MOD_X_TILED) pitch_limit = 16*1024; else pitch_limit = 32*1024; } else if (INTEL_INFO(dev)->gen >= 3) { - if (obj->tiling_mode) + if (mode_cmd->modifier[0] == I915_FORMAT_MOD_X_TILED) pitch_limit = 8*1024; else pitch_limit = 16*1024; @@ -12735,12 +12752,13 @@ static int intel_framebuffer_init(struct drm_device *dev, if (mode_cmd->pitches[0] > pitch_limit) { DRM_DEBUG("%s pitch (%d) must be at less than %d\n", - obj->tiling_mode ? "tiled" : "linear", + mode_cmd->modifier[0] == I915_FORMAT_MOD_X_TILED ? + "tiled" : "linear", mode_cmd->pitches[0], pitch_limit); return -EINVAL; } - if (obj->tiling_mode != I915_TILING_NONE && + if (mode_cmd->modifier[0] == I915_FORMAT_MOD_X_TILED && mode_cmd->pitches[0] != obj->stride) { DRM_DEBUG("pitch (%d) must match tiling stride (%d)\n", mode_cmd->pitches[0], obj->stride); -- 2.1.4