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

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Thu, Sep 18, 2014 at 04:43:16PM -0300, Gustavo Padovan wrote:
> From: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
> 
> After some refactor intel_primary_plane_setplane() does the same
> as intel_pipe_set_base() so we can get rid of it and replace the calls
> with intel_primary_plane_setplane().
> 
> Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
> ---
>  drivers/gpu/drm/i915/intel_display.c | 79 ++++--------------------------------
>  1 file changed, 8 insertions(+), 71 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 6c61c8f..2477587 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -2763,74 +2763,6 @@ static void intel_update_pipe_size(struct intel_crtc *crtc)
>  	crtc->config.pipe_src_h = adjusted_mode->crtc_vdisplay;
>  }
>  
> -static int
> -intel_pipe_set_base(struct drm_crtc *crtc, int x, int y,
> -		    struct drm_framebuffer *fb)
> -{
> -	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;
> -	struct drm_framebuffer *old_fb = crtc->primary->fb;
> -	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
> -	struct drm_i915_gem_object *old_obj = intel_fb_obj(old_fb);
> -	int ret;
> -
> -	if (intel_crtc_has_pending_flip(crtc)) {
> -		DRM_ERROR("pipe is still busy with an old pageflip\n");
> -		return -EBUSY;
> -	}
> -
> -	/* no fb bound */
> -	if (!fb) {
> -		DRM_ERROR("No FB bound\n");
> -		return 0;
> -	}
> -
> -	if (intel_crtc->plane > INTEL_INFO(dev)->num_pipes) {
> -		DRM_ERROR("no plane for crtc: plane %c, num_pipes %d\n",
> -			  plane_name(intel_crtc->plane),
> -			  INTEL_INFO(dev)->num_pipes);
> -		return -EINVAL;
> -	}
> -
> -	mutex_lock(&dev->struct_mutex);
> -	ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);
> -	if (ret == 0)
> -		i915_gem_track_fb(old_obj, obj,
> -				  INTEL_FRONTBUFFER_PRIMARY(pipe));
> -	mutex_unlock(&dev->struct_mutex);
> -	if (ret != 0) {
> -		DRM_ERROR("pin & fence failed\n");
> -		return ret;
> -	}
> -
> -	intel_update_pipe_size(intel_crtc);
> -
> -	dev_priv->display.update_primary_plane(crtc, fb, x, y);
> -
> -	if (intel_crtc->active)
> -		intel_frontbuffer_flip(dev, INTEL_FRONTBUFFER_PRIMARY(pipe));
> -
> -	crtc->primary->fb = fb;
> -	crtc->x = x;
> -	crtc->y = y;
> -
> -	if (old_fb) {
> -		if (intel_crtc->active && old_fb != fb)
> -			intel_wait_for_vblank(dev, intel_crtc->pipe);
> -		mutex_lock(&dev->struct_mutex);
> -		intel_unpin_fb_obj(old_obj);
> -		mutex_unlock(&dev->struct_mutex);
> -	}
> -
> -	mutex_lock(&dev->struct_mutex);
> -	intel_update_fbc(dev);
> -	mutex_unlock(&dev->struct_mutex);
> -
> -	return 0;
> -}
> -
>  static void intel_fdi_normal_train(struct drm_crtc *crtc)
>  {
>  	struct drm_device *dev = crtc->dev;
> @@ -9797,6 +9729,7 @@ static int intel_crtc_commit_page_flip(struct drm_crtc *crtc,
>  	struct drm_framebuffer *old_fb = crtc->primary->fb;
>  	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
>  	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
> +	struct drm_plane *primary = crtc->primary;
>  	enum pipe pipe = intel_crtc->pipe;
>  	struct intel_unpin_work *work;
>  	struct intel_engine_cs *ring;
> @@ -9938,7 +9871,9 @@ free_work:
>  	if (ret == -EIO) {
>  out_hang:
>  		intel_crtc_wait_for_pending_flips(crtc);
> -		ret = intel_pipe_set_base(crtc, crtc->x, crtc->y, fb);
> +		ret = primary->funcs->update_plane(primary, crtc, fb,
> +						   0, 0, 0, 0,
> +						   crtc->x, crtc->y, 0, 0);

I think we want page flips to not change the current plane setup so
these should be:
intel_plane->crtc_x/y/w/h
intel_plane->src_x/y/w/h

>  		if (ret == 0 && event) {
>  			spin_lock_irq(&dev->event_lock);
>  			drm_send_vblank_event(dev, pipe, event);
> @@ -11475,11 +11410,13 @@ static int intel_crtc_set_config(struct drm_mode_set *set)
>  				     set->x, set->y, set->fb);
>  	} else if (config->fb_changed) {
>  		struct intel_crtc *intel_crtc = to_intel_crtc(set->crtc);
> +		struct drm_plane *primary = set->crtc->primary;
>  
>  		intel_crtc_wait_for_pending_flips(set->crtc);
>  
> -		ret = intel_pipe_set_base(set->crtc,
> -					  set->x, set->y, set->fb);
> +		ret = primary->funcs->update_plane(primary, set->crtc, set->fb,
> +						   0, 0, 0, 0,
> +						   set->x, set->y, 0, 0);

And these should really be:
0, 0, hdisplay, vdisplay,
set->x << 16, set->y << 16, hdisplay << 16, vdisplay << 16,

Oh, one extra complication here is the stereo modes, so I think we'll be
needing to borrow the stereo doubling trick from intel_modeset_pipe_config()
to adjust hdisplay/vdisplay when appropriate.

And we'll be needing something also for the full modeset path
so that intel_plane->crtc_* and intel_plane->src_* get initialized
properly. Perhaps it's enough to rip out the fb pin/unpin stuff
from __intel_set_mode() and just replace it with a call to
->update_plane().

>  
>  		/*
>  		 * We need to make sure the primary plane is re-enabled if it
> -- 
> 1.9.3
> 
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-- 
Ville Syrjälä
Intel OTC