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

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Hi Ville,

2014-10-24 Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>:

> 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);
> 
> So we need to make sure state->visible==false when there's no fb. I
> suppose we should just do that in drm_plane_helper_check_update().

The code to check that is merged already, do you have any other comment on
this patch?

	Gustavo
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