drm/omap: introduce omap_hw_overlay

Split out the hardware overlay specifics from omap_plane.
To start, the hw overlays are statically assigned to planes.

The goal is to eventually assign hw overlays dynamically to planes
during plane->atomic_check() based on requested caps (scaling, YUV,
etc). And then perform hw overlay re-assignment if required.

Signed-off-by: Benoit Parrot <bparrot@ti.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211117141928.771082-5-narmstrong@baylibre.com

1 files changed, 21 insertions, 33 deletions

diff --git a/drivers/gpu/drm/omapdrm/omap_plane.c b/drivers/gpu/drm/omapdrm/omap_plane.c
index 846698c21a4a..8cc2b899f20c 100644
--- a/drivers/gpu/drm/omapdrm/omap_plane.c
+++ b/drivers/gpu/drm/omapdrm/omap_plane.c
@@ -21,7 +21,8 @@
 struct omap_plane {
 	struct drm_plane base;
 	enum omap_plane_id id;
-	const char *name;
+
+	struct omap_hw_overlay *overlay;
 };
 
 static int omap_plane_prepare_fb(struct drm_plane *plane,
@@ -49,10 +50,11 @@ static void omap_plane_atomic_update(struct drm_plane *plane,
 	struct omap_plane *omap_plane = to_omap_plane(plane);
 	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
 									   plane);
+	enum omap_plane_id ovl_id = omap_plane->overlay->id;
 	struct omap_overlay_info info;
 	int ret;
 
-	DBG("%s, crtc=%p fb=%p", omap_plane->name, new_state->crtc,
+	DBG("%s, crtc=%p fb=%p", plane->name, new_state->crtc,
 	    new_state->fb);
 
 	memset(&info, 0, sizeof(info));
@@ -77,17 +79,17 @@ static void omap_plane_atomic_update(struct drm_plane *plane,
 			&info.paddr, &info.p_uv_addr);
 
 	/* and finally, update omapdss: */
-	ret = dispc_ovl_setup(priv->dispc, omap_plane->id, &info,
+	ret = dispc_ovl_setup(priv->dispc, ovl_id, &info,
 			      omap_crtc_timings(new_state->crtc), false,
 			      omap_crtc_channel(new_state->crtc));
 	if (ret) {
 		dev_err(plane->dev->dev, "Failed to setup plane %s\n",
-			omap_plane->name);
-		dispc_ovl_enable(priv->dispc, omap_plane->id, false);
+			plane->name);
+		dispc_ovl_enable(priv->dispc, ovl_id, false);
 		return;
 	}
 
-	dispc_ovl_enable(priv->dispc, omap_plane->id, true);
+	dispc_ovl_enable(priv->dispc, ovl_id, true);
 }
 
 static void omap_plane_atomic_disable(struct drm_plane *plane,
@@ -97,11 +99,12 @@ static void omap_plane_atomic_disable(struct drm_plane *plane,
 									   plane);
 	struct omap_drm_private *priv = plane->dev->dev_private;
 	struct omap_plane *omap_plane = to_omap_plane(plane);
+	enum omap_plane_id ovl_id = omap_plane->overlay->id;
 
 	new_state->rotation = DRM_MODE_ROTATE_0;
 	new_state->zpos = plane->type == DRM_PLANE_TYPE_PRIMARY ? 0 : omap_plane->id;
 
-	dispc_ovl_enable(priv->dispc, omap_plane->id, false);
+	dispc_ovl_enable(priv->dispc, ovl_id, false);
 }
 
 #define FRAC_16_16(mult, div)    (((mult) << 16) / (div))
@@ -184,7 +187,7 @@ static void omap_plane_destroy(struct drm_plane *plane)
 {
 	struct omap_plane *omap_plane = to_omap_plane(plane);
 
-	DBG("%s", omap_plane->name);
+	DBG("%s", plane->name);
 
 	drm_plane_cleanup(plane);
 
@@ -290,20 +293,6 @@ static bool omap_plane_supports_yuv(struct drm_plane *plane)
 	return false;
 }
 
-static const char *plane_id_to_name[] = {
-	[OMAP_DSS_GFX] = "gfx",
-	[OMAP_DSS_VIDEO1] = "vid1",
-	[OMAP_DSS_VIDEO2] = "vid2",
-	[OMAP_DSS_VIDEO3] = "vid3",
-};
-
-static const enum omap_plane_id plane_idx_to_id[] = {
-	OMAP_DSS_GFX,
-	OMAP_DSS_VIDEO1,
-	OMAP_DSS_VIDEO2,
-	OMAP_DSS_VIDEO3,
-};
-
 /* initialize plane */
 struct drm_plane *omap_plane_init(struct drm_device *dev,
 		int idx, enum drm_plane_type type,
@@ -313,27 +302,26 @@ struct drm_plane *omap_plane_init(struct drm_device *dev,
 	unsigned int num_planes = dispc_get_num_ovls(priv->dispc);
 	struct drm_plane *plane;
 	struct omap_plane *omap_plane;
-	enum omap_plane_id id;
 	int ret;
 	u32 nformats;
 	const u32 *formats;
 
-	if (WARN_ON(idx >= ARRAY_SIZE(plane_idx_to_id)))
+	if (WARN_ON(idx >= num_planes))
 		return ERR_PTR(-EINVAL);
 
-	id = plane_idx_to_id[idx];
-
-	DBG("%s: type=%d", plane_id_to_name[id], type);
-
 	omap_plane = kzalloc(sizeof(*omap_plane), GFP_KERNEL);
 	if (!omap_plane)
 		return ERR_PTR(-ENOMEM);
 
-	formats = dispc_ovl_get_color_modes(priv->dispc, id);
+	omap_plane->id = idx;
+	omap_plane->overlay = priv->overlays[idx];
+
+	DBG("%d: type=%d", omap_plane->id, type);
+	DBG("	crtc_mask: 0x%04x", possible_crtcs);
+
+	formats = dispc_ovl_get_color_modes(priv->dispc, omap_plane->overlay->id);
 	for (nformats = 0; formats[nformats]; ++nformats)
 		;
-	omap_plane->id = id;
-	omap_plane->name = plane_id_to_name[id];
 
 	plane = &omap_plane->base;
 
@@ -363,8 +351,8 @@ struct drm_plane *omap_plane_init(struct drm_device *dev,
 	return plane;
 
 error:
-	dev_err(dev->dev, "%s(): could not create plane: %s\n",
-		__func__, plane_id_to_name[id]);
+	dev_err(dev->dev, "%s(): could not create plane: %d\n",
+		__func__, omap_plane->id);
 
 	kfree(omap_plane);
 	return NULL;