Re: [PATCH 2/4] drm/i915: Introduce a vfunc for platform-specfic MMIO flip code

[Daniel Vetter <daniel@ffwll.ch>]

On Sat, Oct 25, 2014 at 12:11:12AM +0100, Damien Lespiau wrote:
> SKL will specialize it.
> 
> Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>

So with atomic I'd expect that we'd have one giant mmio_flip driver
function and that just calls into the relevant platform/plane update
hooks. Gustavo&Ville are working on that monster.

Now this here seems to add another incarnation. Can't I have just one
please?

Thanks, Daniel
> ---
>  drivers/gpu/drm/i915/i915_drv.h      |  1 +
>  drivers/gpu/drm/i915/intel_display.c | 17 +++++++++++++----
>  2 files changed, 14 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 627b7e7..d979549 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -492,6 +492,7 @@ struct drm_i915_display_funcs {
>  			  struct drm_i915_gem_object *obj,
>  			  struct intel_engine_cs *ring,
>  			  uint32_t flags);
> +	void (*do_mmio_flip)(struct intel_crtc *crtc);
>  	void (*update_primary_plane)(struct drm_crtc *crtc,
>  				     struct drm_framebuffer *fb,
>  				     int x, int y);
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 5133ef9..07440ad 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -9552,7 +9552,7 @@ static bool use_mmio_flip(struct intel_engine_cs *ring,
>  		return ring != obj->ring;
>  }
>  
> -static void intel_do_mmio_flip(struct intel_crtc *intel_crtc)
> +static void ilk_do_mmio_flip(struct intel_crtc *intel_crtc)
>  {
>  	struct drm_device *dev = intel_crtc->base.dev;
>  	struct drm_i915_private *dev_priv = dev->dev_private;
> @@ -9561,9 +9561,6 @@ static void intel_do_mmio_flip(struct intel_crtc *intel_crtc)
>  	struct drm_i915_gem_object *obj = intel_fb->obj;
>  	u32 dspcntr;
>  	u32 reg;
> -
> -	intel_mark_page_flip_active(intel_crtc);
> -
>  	reg = DSPCNTR(intel_crtc->plane);
>  	dspcntr = I915_READ(reg);
>  
> @@ -9579,6 +9576,15 @@ static void intel_do_mmio_flip(struct intel_crtc *intel_crtc)
>  	POSTING_READ(DSPSURF(intel_crtc->plane));
>  }
>  
> +static void intel_do_mmio_flip(struct intel_crtc *intel_crtc)
> +{
> +	struct drm_device *dev = intel_crtc->base.dev;
> +	struct drm_i915_private *dev_priv = dev->dev_private;
> +
> +	intel_mark_page_flip_active(intel_crtc);
> +	dev_priv->display.do_mmio_flip(intel_crtc);
> +}
> +
>  static int intel_postpone_flip(struct drm_i915_gem_object *obj)
>  {
>  	struct intel_engine_cs *ring;
> @@ -12694,6 +12700,9 @@ static void intel_init_display(struct drm_device *dev)
>  		break;
>  	}
>  
> +	if (INTEL_INFO(dev)->gen >= 5)
> +		dev_priv->display.do_mmio_flip = ilk_do_mmio_flip;
> +
>  	intel_panel_init_backlight_funcs(dev);
>  
>  	mutex_init(&dev_priv->pps_mutex);
> -- 
> 1.8.3.1
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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