[PATCH v2 8/8] drm/i915: Give meaningful names to all the planes

[ville.syrjala at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Let's name our planes in a way that makes sense wrt. the spec:
- skl+ -> "plane 1A", "plane 2A", "plane 1C", "cursor A" etc.
- g4x+ -> "primary A", "primary B", "sprite A", "cursor C" etc.
- pre-g4x -> "plane A", "cursor B" etc.

v2: Rebase on top of the fixed/cleaned error paths
    Use a local 'name' variable to make things easier

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 30 ++++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/intel_sprite.c  | 14 ++++++++++++++
 2 files changed, 44 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index bb49d7d..15b133e 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -13787,10 +13787,18 @@ static void intel_finish_crtc_commit(struct drm_crtc *crtc,
  */
 void intel_plane_destroy(struct drm_plane *plane)
 {
+	char *name;
+
 	if (!plane)
 		return;
 
+	/*
+	 * drm_plane_cleanup() zeroes the structure, so
+	 * need an extra dance to avoid leaking the name.
+	 */
+	name = plane->name;
 	drm_plane_cleanup(plane);
+	kfree(name);
 	kfree(to_intel_plane(plane));
 }
 
@@ -13811,6 +13819,7 @@ static struct drm_plane *intel_primary_plane_create(struct drm_device *dev,
 {
 	struct intel_plane *primary = NULL;
 	struct intel_plane_state *state = NULL;
+	char *name = NULL;
 	const uint32_t *intel_primary_formats;
 	unsigned int num_formats;
 	int ret;
@@ -13839,6 +13848,19 @@ static struct drm_plane *intel_primary_plane_create(struct drm_device *dev,
 	if (HAS_FBC(dev) && INTEL_INFO(dev)->gen < 4)
 		primary->plane = !pipe;
 
+	if (INTEL_INFO(dev)->gen >= 9)
+		name = kasprintf(GFP_KERNEL, "plane 1%c",
+				 pipe_name(pipe));
+	else if (INTEL_INFO(dev)->gen >= 5 || IS_G4X(dev))
+		name = kasprintf(GFP_KERNEL, "primary %c",
+				 pipe_name(pipe));
+	else
+		name = kasprintf(GFP_KERNEL, "plane %c",
+				 plane_name(primary->plane));
+	if (!name)
+		goto fail;
+	primary->base.name = name;
+
 	if (INTEL_INFO(dev)->gen >= 9) {
 		intel_primary_formats = skl_primary_formats;
 		num_formats = ARRAY_SIZE(skl_primary_formats);
@@ -13865,6 +13887,7 @@ static struct drm_plane *intel_primary_plane_create(struct drm_device *dev,
 	return &primary->base;
 
 fail:
+	kfree(name);
 	kfree(state);
 	kfree(primary);
 
@@ -13975,6 +13998,7 @@ static struct drm_plane *intel_cursor_plane_create(struct drm_device *dev,
 {
 	struct intel_plane *cursor = NULL;
 	struct intel_plane_state *state = NULL;
+	char *name = NULL;
 	int ret;
 
 	cursor = kzalloc(sizeof(*cursor), GFP_KERNEL);
@@ -13995,6 +14019,11 @@ static struct drm_plane *intel_cursor_plane_create(struct drm_device *dev,
 	cursor->commit_plane = intel_commit_cursor_plane;
 	cursor->disable_plane = intel_disable_cursor_plane;
 
+	name = kasprintf(GFP_KERNEL, "cursor %c", pipe_name(pipe));
+	if (!name)
+		goto fail;
+	cursor->base.name = name;
+
 	ret = drm_universal_plane_init(dev, &cursor->base, 0,
 				       &intel_plane_funcs,
 				       intel_cursor_formats,
@@ -14023,6 +14052,7 @@ static struct drm_plane *intel_cursor_plane_create(struct drm_device *dev,
 	return &cursor->base;
 
 fail:
+	kfree(name);
 	kfree(state);
 	kfree(cursor);
 
diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index 44e1e39..50e53ee 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -1040,6 +1040,7 @@ intel_plane_init(struct drm_device *dev, enum pipe pipe, int plane)
 {
 	struct intel_plane *intel_plane = NULL;
 	struct intel_plane_state *state = NULL;
+	char *name = NULL;
 	unsigned long possible_crtcs;
 	const uint32_t *plane_formats;
 	int num_plane_formats;
@@ -1123,6 +1124,18 @@ intel_plane_init(struct drm_device *dev, enum pipe pipe, int plane)
 	intel_plane->check_plane = intel_check_sprite_plane;
 	intel_plane->commit_plane = intel_commit_sprite_plane;
 
+	if (INTEL_INFO(dev)->gen >= 9)
+		name = kasprintf(GFP_KERNEL, "plane %d%c",
+				 plane + 2, pipe_name(pipe));
+	else
+		name = kasprintf(GFP_KERNEL, "sprite %c",
+				 sprite_name(pipe, plane));
+	if (!name) {
+		ret = -ENOMEM;
+		goto fail;
+	}
+	intel_plane->base.name = name;
+
 	possible_crtcs = (1 << pipe);
 
 	ret = drm_universal_plane_init(dev, &intel_plane->base, possible_crtcs,
@@ -1139,6 +1152,7 @@ intel_plane_init(struct drm_device *dev, enum pipe pipe, int plane)
 	return 0;
 
 fail:
+	kfree(name);
 	kfree(state);
 	kfree(intel_plane);
 
-- 
2.4.10