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| author | Dhinakaran Pandiyan | 2018-03-07 04:34:18 +0100 |
|---|---|---|
| committer | Rodrigo Vivi | 2018-03-13 21:49:39 +0100 |
| commit | 07bcd99b80477cc4f1b878afb3dec26877fa0ed0 (patch) | |
| tree | 9eec8c7dc19557d9d1ceeadae2a6ad147000e786 /drivers/gpu/drm/i915/i915_gem.c | |
| parent | drm/i915: Use sseu size for determining eu_regs[] (diff) | |
| download | kernel-qcow2-linux-07bcd99b80477cc4f1b878afb3dec26877fa0ed0.tar.gz kernel-qcow2-linux-07bcd99b80477cc4f1b878afb3dec26877fa0ed0.tar.xz kernel-qcow2-linux-07bcd99b80477cc4f1b878afb3dec26877fa0ed0.zip | |
drm/i915/frontbuffer: Pull frontbuffer_flush out of gem_obj_pin_to_display
i915_gem_obj_pin_to_display() calls frontbuffer_flush with origin set to
DIRTYFB. The callers however are at a vantage point to decide if hardware
frontbuffer tracking can do the flush for us. For example, legacy cursor
updates, like flips, write to MMIO registers, which then triggers PSR flush
by the hardware. Moving frontbuffer_flush out will enable us to skip a
software initiated flush by setting origin to FLIP. Thanks to Chris for the
idea.
v2:
Rebased due to Ville adding intel_plane_pin_fb().
Minor code reordering as fb_obj_flush doesn't need struct_mutex (Chris)
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180307033420.3086-1-dhinakaran.pandiyan@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 05b0724b60dc..58f8cf7d3b40 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -4094,9 +4094,10 @@ out: } /* - * Prepare buffer for display plane (scanout, cursors, etc). - * Can be called from an uninterruptible phase (modesetting) and allows - * any flushes to be pipelined (for pageflips). + * Prepare buffer for display plane (scanout, cursors, etc). Can be called from + * an uninterruptible phase (modesetting) and allows any flushes to be pipelined + * (for pageflips). We only flush the caches while preparing the buffer for + * display, the callers are responsible for frontbuffer flush. */ struct i915_vma * i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj, @@ -4152,9 +4153,7 @@ i915_gem_object_pin_to_display_plane(struct drm_i915_gem_object *obj, vma->display_alignment = max_t(u64, vma->display_alignment, alignment); - /* Treat this as an end-of-frame, like intel_user_framebuffer_dirty() */ __i915_gem_object_flush_for_display(obj); - intel_fb_obj_flush(obj, ORIGIN_DIRTYFB); /* It should now be out of any other write domains, and we can update * the domain values for our changes. |