Re: [PATCH v4 5/5] drm/i915: remove intel_crtc_cursor_set_obj()

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On Fri, Oct 24, 2014 at 02:51:35PM +0100, Gustavo Padovan wrote:
> From: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxxxx>
> 
> Merge it into the plane update_plane() callback and make other
> users use the update_plane() functions instead.
> 
> The fb != crtc->cursor->fb was already inside intel_crtc_cursor_set_obj()
> so we fold intel_crtc_cursor_set_obj() inside intel_commit_cursor_plane()
> and merge both paths into one.
> 
> Signed-off-by: Gustavo Padovan <gustavo.padovan@xxxxxxxxxxxxxxx>
> ---
>  drivers/gpu/drm/i915/intel_display.c | 215 ++++++++++++++++-------------------
>  1 file changed, 100 insertions(+), 115 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 9a913f5..60ec165 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -8453,109 +8453,6 @@ static bool cursor_size_ok(struct drm_device *dev,
>  	return true;
>  }
>  
> -static int intel_crtc_cursor_set_obj(struct drm_crtc *crtc,
> -				     struct drm_i915_gem_object *obj,
> -				     uint32_t width, uint32_t height)
> -{
> -	struct drm_device *dev = crtc->dev;
> -	struct drm_i915_private *dev_priv = dev->dev_private;
> -	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
> -	enum pipe pipe = intel_crtc->pipe;
> -	unsigned old_width;
> -	uint32_t addr;
> -	int ret;
> -
> -	/* if we want to turn off the cursor ignore width and height */
> -	if (!obj) {
> -		DRM_DEBUG_KMS("cursor off\n");
> -		addr = 0;
> -		mutex_lock(&dev->struct_mutex);
> -		goto finish;
> -	}
> -
> -	/* we only need to pin inside GTT if cursor is non-phy */
> -	mutex_lock(&dev->struct_mutex);
> -	if (!INTEL_INFO(dev)->cursor_needs_physical) {
> -		unsigned alignment;
> -
> -		/*
> -		 * Global gtt pte registers are special registers which actually
> -		 * forward writes to a chunk of system memory. Which means that
> -		 * there is no risk that the register values disappear as soon
> -		 * as we call intel_runtime_pm_put(), so it is correct to wrap
> -		 * only the pin/unpin/fence and not more.
> -		 */
> -		intel_runtime_pm_get(dev_priv);
> -
> -		/* Note that the w/a also requires 2 PTE of padding following
> -		 * the bo. We currently fill all unused PTE with the shadow
> -		 * page and so we should always have valid PTE following the
> -		 * cursor preventing the VT-d warning.
> -		 */
> -		alignment = 0;
> -		if (need_vtd_wa(dev))
> -			alignment = 64*1024;
> -
> -		ret = i915_gem_object_pin_to_display_plane(obj, alignment, NULL);
> -		if (ret) {
> -			DRM_DEBUG_KMS("failed to move cursor bo into the GTT\n");
> -			intel_runtime_pm_put(dev_priv);
> -			goto fail_locked;
> -		}
> -
> -		ret = i915_gem_object_put_fence(obj);
> -		if (ret) {
> -			DRM_DEBUG_KMS("failed to release fence for cursor");
> -			intel_runtime_pm_put(dev_priv);
> -			goto fail_unpin;
> -		}
> -
> -		addr = i915_gem_obj_ggtt_offset(obj);
> -
> -		intel_runtime_pm_put(dev_priv);
> -	} else {
> -		int align = IS_I830(dev) ? 16 * 1024 : 256;
> -		ret = i915_gem_object_attach_phys(obj, align);
> -		if (ret) {
> -			DRM_DEBUG_KMS("failed to attach phys object\n");
> -			goto fail_locked;
> -		}
> -		addr = obj->phys_handle->busaddr;
> -	}
> -
> - finish:
> -	if (intel_crtc->cursor_bo) {
> -		if (!INTEL_INFO(dev)->cursor_needs_physical)
> -			i915_gem_object_unpin_from_display_plane(intel_crtc->cursor_bo);
> -	}
> -
> -	i915_gem_track_fb(intel_crtc->cursor_bo, obj,
> -			  INTEL_FRONTBUFFER_CURSOR(pipe));
> -	mutex_unlock(&dev->struct_mutex);
> -
> -	old_width = intel_crtc->cursor_width;
> -
> -	intel_crtc->cursor_addr = addr;
> -	intel_crtc->cursor_bo = obj;
> -	intel_crtc->cursor_width = width;
> -	intel_crtc->cursor_height = height;
> -
> -	if (intel_crtc->active) {
> -		if (old_width != width)
> -			intel_update_watermarks(crtc);
> -		intel_crtc_update_cursor(crtc, intel_crtc->cursor_bo != NULL);
> -
> -		intel_frontbuffer_flip(dev, INTEL_FRONTBUFFER_CURSOR(pipe));
> -	}
> -
> -	return 0;
> -fail_unpin:
> -	i915_gem_object_unpin_from_display_plane(obj);
> -fail_locked:
> -	mutex_unlock(&dev->struct_mutex);
> -	return ret;
> -}
> -
>  static void intel_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
>  				 u16 *blue, uint32_t start, uint32_t size)
>  {
> @@ -11906,7 +11803,8 @@ intel_cursor_plane_disable(struct drm_plane *plane)
>  
>  	BUG_ON(!plane->crtc);
>  
> -	return intel_crtc_cursor_set_obj(plane->crtc, NULL, 0, 0);
> +	return plane->funcs->update_plane(plane, plane->crtc, NULL,
> +					  0, 0, 0, 0, 0, 0, 0, 0);
>  }
>  
>  static int
> @@ -11970,26 +11868,113 @@ intel_commit_cursor_plane(struct drm_plane *plane,
>  			  struct intel_plane_state *state)
>  {
>  	struct drm_crtc *crtc = state->crtc;
> +	struct drm_device *dev = crtc->dev;
> +	struct drm_i915_private *dev_priv = dev->dev_private;
>  	struct drm_framebuffer *fb = state->fb;
>  	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
> -	struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
> -	struct drm_i915_gem_object *obj = intel_fb->obj;
> -	int crtc_w, crtc_h;
> +	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
> +	enum pipe pipe = intel_crtc->pipe;
> +	unsigned old_width;
> +	uint32_t addr;
> +	int ret;
>  
>  	crtc->cursor_x = state->orig_dst.x1;
>  	crtc->cursor_y = state->orig_dst.y1;
> -	if (fb != crtc->cursor->fb) {
> -		crtc_w = drm_rect_width(&state->orig_dst);
> -		crtc_h = drm_rect_height(&state->orig_dst);
> -		return intel_crtc_cursor_set_obj(crtc, obj, crtc_w, crtc_h);
> +
> +	if (intel_crtc->cursor_bo == obj)
> +		goto update;
> +
> +	/* if we want to turn off the cursor ignore width and height */
> +	if (!obj) {
> +		DRM_DEBUG_KMS("cursor off\n");
> +		addr = 0;
> +		mutex_lock(&dev->struct_mutex);
> +		goto finish;
> +	}
> +
> +	/* we only need to pin inside GTT if cursor is non-phy */
> +	mutex_lock(&dev->struct_mutex);
> +	if (!INTEL_INFO(dev)->cursor_needs_physical) {
> +		unsigned alignment;
> +
> +		/*
> +		 * Global gtt pte registers are special registers which actually
> +		 * forward writes to a chunk of system memory. Which means that
> +		 * there is no risk that the register values disappear as soon
> +		 * as we call intel_runtime_pm_put(), so it is correct to wrap
> +		 * only the pin/unpin/fence and not more.
> +		 */
> +		intel_runtime_pm_get(dev_priv);
> +
> +		/* Note that the w/a also requires 2 PTE of padding following
> +		 * the bo. We currently fill all unused PTE with the shadow
> +		 * page and so we should always have valid PTE following the
> +		 * cursor preventing the VT-d warning.
> +		 */
> +		alignment = 0;
> +		if (need_vtd_wa(dev))
> +			alignment = 64*1024;
> +
> +		ret = i915_gem_object_pin_to_display_plane(obj, alignment, NULL);
> +		if (ret) {
> +			DRM_DEBUG_KMS("failed to move cursor bo into the GTT\n");
> +			intel_runtime_pm_put(dev_priv);
> +			goto fail_locked;
> +		}
> +
> +		ret = i915_gem_object_put_fence(obj);
> +		if (ret) {
> +			DRM_DEBUG_KMS("failed to release fence for cursor");
> +			intel_runtime_pm_put(dev_priv);
> +			goto fail_unpin;
> +		}
> +
> +		addr = i915_gem_obj_ggtt_offset(obj);
> +
> +		intel_runtime_pm_put(dev_priv);
>  	} else {
> -		intel_crtc_update_cursor(crtc, state->visible);
> +		int align = IS_I830(dev) ? 16 * 1024 : 256;
> +		ret = i915_gem_object_attach_phys(obj, align);
> +		if (ret) {
> +			DRM_DEBUG_KMS("failed to attach phys object\n");
> +			goto fail_locked;
> +		}
> +		addr = obj->phys_handle->busaddr;
> +	}
>  
> -		intel_frontbuffer_flip(crtc->dev,
> -				       INTEL_FRONTBUFFER_CURSOR(intel_crtc->pipe));
> +finish:
> +	if (intel_crtc->cursor_bo) {
> +		if (!INTEL_INFO(dev)->cursor_needs_physical)
> +			i915_gem_object_unpin_from_display_plane(intel_crtc->cursor_bo);
> +	}
>  
> -		return 0;
> +	i915_gem_track_fb(intel_crtc->cursor_bo, obj,
> +			  INTEL_FRONTBUFFER_CURSOR(pipe));
> +	mutex_unlock(&dev->struct_mutex);
> +
> +	intel_crtc->cursor_addr = addr;
> +	intel_crtc->cursor_bo = obj;
> +update:
> +	old_width = intel_crtc->cursor_width;
> +
> +	intel_crtc->cursor_width = drm_rect_width(&state->orig_dst);
> +	intel_crtc->cursor_height = drm_rect_height(&state->orig_dst);
> +
> +	if (intel_crtc->active) {
> +		if (old_width != intel_crtc->cursor_width)
> +			intel_update_watermarks(crtc);
> +		intel_crtc_update_cursor(crtc, state->visible);
> +
> +		intel_frontbuffer_flip(dev, INTEL_FRONTBUFFER_CURSOR(pipe));
>  	}
> +
> +	return 0;
> +fail_unpin:
> +	i915_gem_object_unpin_from_display_plane(obj);
> +fail_locked:
> +	mutex_unlock(&dev->struct_mutex);
> +	drm_gem_object_unreference_unlocked(&obj->base);

That unref needs to be dropped. With that change the patch is

Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>

> +	return ret;
>  }
>  
>  static int
> -- 
> 1.9.3
> 
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> Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Ville Syrjälä
Intel OTC
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