Re: [Intel-gfx] [PATCH 1/5] drm: Add __drm_atomic_helper_crtc_state_reset() & co.

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

On Fri, Dec 13, 2019 at 03:38:53PM -0800, Lucas De Marchi wrote:
> On Thu, Nov 07, 2019 at 04:24:13PM +0200, Ville Syrjälä wrote:
> >From: Ville Syrjälä <ville.syrjala@linux.intel.com>
> >
> >Annoyingly __drm_atomic_helper_crtc_reset() does two
> >totally separate things:
> >a) reset the state to defaults values
> >b) assign the crtc->state pointer
> >
> >I just want a) without the b) so let's split out part
> >a) into __drm_atomic_helper_crtc_state_reset(). And
> >of course we'll do the same thing for planes and connectors.
> >
> >Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> >---
> > drivers/gpu/drm/drm_atomic_state_helper.c | 70 ++++++++++++++++++++---
> > include/drm/drm_atomic_state_helper.h     |  6 ++
> > 2 files changed, 67 insertions(+), 9 deletions(-)
> >
> >diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c
> >index d0a937fb0c56..a972068d58cf 100644
> >--- a/drivers/gpu/drm/drm_atomic_state_helper.c
> >+++ b/drivers/gpu/drm/drm_atomic_state_helper.c
> >@@ -57,6 +57,22 @@
> >  * for these functions.
> >  */
> >
> >+/**
> >+ * __drm_atomic_helper_crtc_state_reset - reset the CRTC state
> >+ * @crtc_state: atomic CRTC state, must not be NULL
> >+ * @crtc: CRTC object, must not be NULL
> >+ *
> >+ * Initializes the newly allocated @crtc_state with default
> >+ * values. This is useful for drivers that subclass the CRTC state.
> >+ */
> >+void
> >+__drm_atomic_helper_crtc_state_reset(struct drm_crtc_state *crtc_state,
> >+				     struct drm_crtc *crtc)
> >+{
> >+	crtc_state->crtc = crtc;
> >+}
> >+EXPORT_SYMBOL(__drm_atomic_helper_crtc_state_reset);
> >+
> > /**
> >  * __drm_atomic_helper_crtc_reset - reset state on CRTC
> >  * @crtc: drm CRTC
> >@@ -74,7 +90,7 @@ __drm_atomic_helper_crtc_reset(struct drm_crtc *crtc,
> > 			       struct drm_crtc_state *crtc_state)
> > {
> > 	if (crtc_state)
> >-		crtc_state->crtc = crtc;
> >+		__drm_atomic_helper_crtc_state_reset(crtc_state, crtc);
> >
> > 	crtc->state = crtc_state;
> > }
> >@@ -212,23 +228,43 @@ void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
> > EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state);
> >
> > /**
> >- * __drm_atomic_helper_plane_reset - resets planes state to default values
> >+ * __drm_atomic_helper_plane_state_reset - resets plane state to default values
> >+ * @plane_state: atomic plane state, must not be NULL
> >  * @plane: plane object, must not be NULL
> >- * @state: atomic plane state, must not be NULL
> >  *
> >- * Initializes plane state to default. This is useful for drivers that subclass
> >- * the plane state.
> >+ * Initializes the newly allocated @plane_state with default
> >+ * values. This is useful for drivers that subclass the CRTC state.
> >  */
> >-void __drm_atomic_helper_plane_reset(struct drm_plane *plane,
> >-				     struct drm_plane_state *state)
> >+void __drm_atomic_helper_plane_state_reset(struct drm_plane_state *state,
> >+					   struct drm_plane *plane)
> > {
> > 	state->plane = plane;
> > 	state->rotation = DRM_MODE_ROTATE_0;
> >
> > 	state->alpha = DRM_BLEND_ALPHA_OPAQUE;
> > 	state->pixel_blend_mode = DRM_MODE_BLEND_PREMULTI;
> >+}
> >+EXPORT_SYMBOL(__drm_atomic_helper_plane_state_reset);
> >
> >-	plane->state = state;
> >+/**
> >+ * __drm_atomic_helper_plane_reset - reset state on plane
> >+ * @plane: drm plane
> >+ * @plane_state: plane state to assign
> >+ *
> >+ * Initializes the newly allocated @plane_state and assigns it to
> >+ * the &drm_crtc->state pointer of @plane, usually required when
> >+ * initializing the drivers or when called from the &drm_plane_funcs.reset
> >+ * hook.
> >+ *
> >+ * This is useful for drivers that subclass the plane state.
> >+ */
> >+void __drm_atomic_helper_plane_reset(struct drm_plane *plane,
> >+				     struct drm_plane_state *plane_state)
> >+{
> >+	if (plane_state)
> >+		__drm_atomic_helper_plane_state_reset(plane_state, plane);
> >+
> >+	plane->state = plane_state;
> > }
> > EXPORT_SYMBOL(__drm_atomic_helper_plane_reset);
> >
> >@@ -335,6 +371,22 @@ void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
> > }
> > EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state);
> >
> >+/**
> >+ * __drm_atomic_helper_connector_state_reset - reset the connector state
> >+ * @conn__state: atomic connector state, must not be NULL
> 
> typo here, otherwise

Thanks for catching that. Made me run a doc build that found a mismatch
between kerneldoc vs. code for the plane function, so I fixed that up
while pushing.

Entire series pushed to dinq with Daniel's ack for the first patch.
Though in hindsight I could have just pushed that one to drm-misc eons
ago. Oh well.

Thanks for the reviews.

-- 
Ville Syrjälä
Intel
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