drm/arc: Embedded a drm_simple_display_pipe

This is a prep step to convert arc over to the simple kms helpers, for
now we just use this as an embedding container to drop all the various
allocations. Big change is the removal of the various devm_kzalloc,
which have the wrong lifetimes anyway.
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Alexey Brodkin <abrodkin@synopsys.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210112084358.2771527-4-daniel.vetter@ffwll.ch

drivers/gpu/drm/arc/arcpgu.h

@@ -8,17 +8,18 @@
 #ifndef _ARCPGU_H_
 #define _ARCPGU_H_
 
+#include <drm/drm_simple_kms_helper.h>
+
 struct arcpgu_drm_private {
 	struct drm_device	drm;
 	void __iomem		*regs;
 	struct clk		*clk;
-	struct drm_crtc		crtc;
-	struct drm_plane	*plane;
+	struct drm_simple_display_pipe pipe;
 };
 
 #define dev_to_arcpgu(x) container_of(x, struct arcpgu_drm_private, drm)
 
-#define crtc_to_arcpgu_priv(x) container_of(x, struct arcpgu_drm_private, crtc)
+#define crtc_to_arcpgu_priv(x) container_of(x, struct arcpgu_drm_private, pipe.crtc)
 
 static inline void arc_pgu_write(struct arcpgu_drm_private *arcpgu,
 				 unsigned int reg, u32 value)

drivers/gpu/drm/arc/arcpgu_crtc.c

@@ -180,9 +180,7 @@ static struct drm_plane *arc_pgu_plane_init(struct drm_device *drm)
 	struct drm_plane *plane = NULL;
 	int ret;
 
-	plane = devm_kzalloc(drm->dev, sizeof(*plane), GFP_KERNEL);
-	if (!plane)
-		return ERR_PTR(-ENOMEM);
+	plane = &arcpgu->pipe.plane;
 
 	ret = drm_universal_plane_init(drm, plane, 0xff, &arc_pgu_plane_funcs,
 				       arc_pgu_supported_formats,
@@ -193,7 +191,6 @@ static struct drm_plane *arc_pgu_plane_init(struct drm_device *drm)
 		return ERR_PTR(ret);
 
 	drm_plane_helper_add(plane, &arc_pgu_plane_helper_funcs);
-	arcpgu->plane = plane;
 
 	return plane;
 }
@@ -208,13 +205,13 @@ int arc_pgu_setup_crtc(struct drm_device *drm)
 	if (IS_ERR(primary))
 		return PTR_ERR(primary);
 
-	ret = drm_crtc_init_with_planes(drm, &arcpgu->crtc, primary, NULL,
+	ret = drm_crtc_init_with_planes(drm, &arcpgu->pipe.crtc, primary, NULL,
 					&arc_pgu_crtc_funcs, NULL);
 	if (ret) {
 		drm_plane_cleanup(primary);
 		return ret;
 	}
 
-	drm_crtc_helper_add(&arcpgu->crtc, &arc_pgu_crtc_helper_funcs);
+	drm_crtc_helper_add(&arcpgu->pipe.crtc, &arc_pgu_crtc_helper_funcs);
 	return 0;
 }

drivers/gpu/drm/arc/arcpgu_drv.c

@@ -120,7 +120,7 @@ static int arcpgu_show_pxlclock(struct seq_file *m, void *arg)
 	struct drm_device *drm = node->minor->dev;
 	struct arcpgu_drm_private *arcpgu = dev_to_arcpgu(drm);
 	unsigned long clkrate = clk_get_rate(arcpgu->clk);
-	unsigned long mode_clock = arcpgu->crtc.mode.crtc_clock * 1000;
+	unsigned long mode_clock = arcpgu->pipe.crtc.mode.crtc_clock * 1000;
 
 	seq_printf(m, "hw  : %lu\n", clkrate);
 	seq_printf(m, "mode: %lu\n", mode_clock);

drivers/gpu/drm/arc/arcpgu_hdmi.c

@@ -18,14 +18,13 @@ static struct drm_encoder_funcs arcpgu_drm_encoder_funcs = {
 
 int arcpgu_drm_hdmi_init(struct drm_device *drm, struct device_node *np)
 {
+	struct arcpgu_drm_private *arcpgu = dev_to_arcpgu(drm);
 	struct drm_encoder *encoder;
 	struct drm_bridge *bridge;
 
 	int ret = 0;
 
-	encoder = devm_kzalloc(drm->dev, sizeof(*encoder), GFP_KERNEL);
-	if (encoder == NULL)
-		return -ENOMEM;
+	encoder = &arcpgu->pipe.encoder;
 
 	/* Locate drm bridge from the hdmi encoder DT node */
 	bridge = of_drm_find_bridge(np);

drivers/gpu/drm/arc/arcpgu_sim.c

@@ -56,14 +56,13 @@ static struct drm_encoder_funcs arcpgu_drm_encoder_funcs = {
 
 int arcpgu_drm_sim_init(struct drm_device *drm, struct device_node *np)
 {
+	struct arcpgu_drm_private *arcpgu = dev_to_arcpgu(drm);
 	struct arcpgu_drm_connector *arcpgu_connector;
 	struct drm_encoder *encoder;
 	struct drm_connector *connector;
 	int ret;
 
-	encoder = devm_kzalloc(drm->dev, sizeof(*encoder), GFP_KERNEL);
-	if (encoder == NULL)
-		return -ENOMEM;
+	encoder = &arcpgu->pipe.encoder;
 
 	encoder->possible_crtcs = 1;
 	encoder->possible_clones = 0;