diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 36 |
1 files changed, 34 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 2a1c87141693..b98c3b0e5a02 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -3501,6 +3501,22 @@ unlock: return ret; } +static bool is_pin_display(struct drm_i915_gem_object *obj) +{ + /* There are 3 sources that pin objects: + * 1. The display engine (scanouts, sprites, cursors); + * 2. Reservations for execbuffer; + * 3. The user. + * + * We can ignore reservations as we hold the struct_mutex and + * are only called outside of the reservation path. The user + * can only increment pin_count once, and so if after + * subtracting the potential reference by the user, any pin_count + * remains, it must be due to another use by the display engine. + */ + return obj->pin_count - !!obj->user_pin_count; +} + /* * Prepare buffer for display plane (scanout, cursors, etc). * Can be called from an uninterruptible phase (modesetting) and allows @@ -3520,6 +3536,11 @@ i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj, return ret; } + /* Mark the pin_display early so that we account for the + * display coherency whilst setting up the cache domains. + */ + obj->pin_display = true; + /* The display engine is not coherent with the LLC cache on gen6. As * a result, we make sure that the pinning that is about to occur is * done with uncached PTEs. This is lowest common denominator for all @@ -3531,7 +3552,7 @@ i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj, */ ret = i915_gem_object_set_cache_level(obj, I915_CACHE_NONE); if (ret) - return ret; + goto err_unpin_display; /* As the user may map the buffer once pinned in the display plane * (e.g. libkms for the bootup splash), we have to ensure that we @@ -3539,7 +3560,7 @@ i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj, */ ret = i915_gem_obj_ggtt_pin(obj, alignment, true, false); if (ret) - return ret; + goto err_unpin_display; i915_gem_object_flush_cpu_write_domain(obj); @@ -3557,6 +3578,17 @@ i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj, old_write_domain); return 0; + +err_unpin_display: + obj->pin_display = is_pin_display(obj); + return ret; +} + +void +i915_gem_object_unpin_from_display_plane(struct drm_i915_gem_object *obj) +{ + i915_gem_object_unpin(obj); + obj->pin_display = is_pin_display(obj); } int |