Quoting Dhinakaran Pandiyan (2018-02-12 06:08:04)
> DRM_IOCTL_MODE_CURSOR results in a frontbuffer flush before the cursor
> plane MMIOs are written to. But this flush is not necessary for PSR as
> hardware tracking takes care of exiting PSR when the MMIO's are written.
>
> Introduce a new fb_op_origin enum to differentiate these flushes from
> those originating due to a dirty fbdev buffer and ignore this enum in
> psr_flush and psr_invalidate.
>
> Cc: Rodrigo Vivi <rodrigo.v...@intel.com>
> Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandi...@intel.com>
> ---
> drivers/gpu/drm/i915/i915_drv.h | 1 +
> drivers/gpu/drm/i915/i915_gem.c | 2 +-
> drivers/gpu/drm/i915/intel_psr.c | 6 ++++--
> 3 files changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 19d5ac4921e5..158e774ed2e6 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -637,6 +637,7 @@ enum fb_op_origin {
> ORIGIN_CS,
> ORIGIN_FLIP,
> ORIGIN_DIRTYFB,
> + ORIGIN_PINNEDFB,
> };
>
> struct intel_fbc {
> diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
> index fc68b35854df..43146699c497 100644
> --- a/drivers/gpu/drm/i915/i915_gem.c
> +++ b/drivers/gpu/drm/i915/i915_gem.c
> @@ -4141,7 +4141,7 @@ i915_gem_object_pin_to_display_plane(struct
> drm_i915_gem_object *obj,
>
> /* Treat this as an end-of-frame, like intel_user_framebuffer_dirty()
> */
Well this comment is bogus then. Please do explain what is going on
here.
> __i915_gem_object_flush_for_display(obj);
> - intel_fb_obj_flush(obj, ORIGIN_DIRTYFB);
> + intel_fb_obj_flush(obj, ORIGIN_PINNEDFB);
-Chris
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