On Fri, Oct 13, 2017 at 04:58:38PM +0300, Ville Syrjala wrote:
> From: Ville Syrjälä <[email protected]>
> 
> Since we now have a ->get_hw_state() method for planes, let's use
> that during the initial plane fb readout.
> 
> Cc: Daniel Vetter <[email protected]>
> Suggested-by: Daniel Vetter <[email protected]>
> Signed-off-by: Ville Syrjälä <[email protected]>

Reviewed-by: James Ausmus <[email protected]>

> ---
>  drivers/gpu/drm/i915/intel_display.c | 30 ++++++++++++++++--------------
>  1 file changed, 16 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_display.c 
> b/drivers/gpu/drm/i915/intel_display.c
> index 2da670628e35..268d320690f4 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -7465,19 +7465,20 @@ i9xx_get_initial_plane_config(struct intel_crtc *crtc,
>       struct drm_framebuffer *fb;
>       struct intel_framebuffer *intel_fb;
>  
> +     if (!plane->get_hw_state(plane))
> +             return;
> +
> +     intel_fb = kzalloc(sizeof(*intel_fb), GFP_KERNEL);
> +     if (!intel_fb) {
> +             DRM_DEBUG_KMS("failed to alloc fb\n");
> +             return;
> +     }
> +
> +     fb = &intel_fb->base;
> +
> +     fb->dev = dev;
> +
>       val = I915_READ(DSPCNTR(plane_id));
> -     if (!(val & DISPLAY_PLANE_ENABLE))
> -             return;
> -
> -     intel_fb = kzalloc(sizeof(*intel_fb), GFP_KERNEL);
> -     if (!intel_fb) {
> -             DRM_DEBUG_KMS("failed to alloc fb\n");
> -             return;
> -     }
> -
> -     fb = &intel_fb->base;
> -
> -     fb->dev = dev;
>  
>       if (INTEL_GEN(dev_priv) >= 4) {
>               if (val & DISPPLANE_TILED) {
> @@ -8496,6 +8497,9 @@ skylake_get_initial_plane_config(struct intel_crtc 
> *crtc,
>       struct drm_framebuffer *fb;
>       struct intel_framebuffer *intel_fb;
>  
> +     if (!plane->get_hw_state(plane))
> +             return;
> +
>       intel_fb = kzalloc(sizeof(*intel_fb), GFP_KERNEL);
>       if (!intel_fb) {
>               DRM_DEBUG_KMS("failed to alloc fb\n");
> @@ -8507,8 +8511,6 @@ skylake_get_initial_plane_config(struct intel_crtc 
> *crtc,
>       fb->dev = dev;
>  
>       val = I915_READ(PLANE_CTL(pipe, plane_id));
> -     if (!(val & PLANE_CTL_ENABLE))
> -             goto error;
>  
>       pixel_format = val & PLANE_CTL_FORMAT_MASK;
>       fourcc = skl_format_to_fourcc(pixel_format,
> -- 
> 2.13.6
> 
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