drm: renesas: shmobile: Atomic conversion part 1

Implement atomic mode setting for both the primary and overlay planes.
This involves:
  - Moving the primary plane handling code from CRTC mode setting to
    plane handling shared by primary and overlay planes,
  - Adding basic CRTC and mode config atomic mode setting ops, which
    don't do much yet.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/a6b698a1c8c1eaf631c2f928f5888ab5fe7aa4c3.1694767209.git.geert+renesas@glider.be

drivers/gpu/drm/renesas/shmobile/shmob_drm_crtc.c

@@ -11,6 +11,9 @@
 #include <linux/media-bus-format.h>
 #include <linux/pm_runtime.h>
 
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_atomic_state_helper.h>
+#include <drm/drm_atomic_uapi.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_fb_dma_helper.h>
@@ -199,20 +202,14 @@ static void shmob_drm_crtc_start(struct shmob_drm_crtc *scrtc)
 	struct drm_crtc *crtc = &scrtc->base;
 	struct shmob_drm_device *sdev = to_shmob_device(crtc->dev);
 	const struct shmob_drm_interface_data *idata = &sdev->pdata->iface;
-	const struct shmob_drm_format_info *format;
-	struct drm_device *dev = &sdev->ddev;
-	struct drm_plane *plane;
+	struct device *dev = sdev->dev;
 	u32 value;
 	int ret;
 
 	if (scrtc->started)
 		return;
 
-	format = shmob_drm_format_info(crtc->primary->fb->format->format);
-	if (WARN_ON(format == NULL))
-		return;
-
-	ret = pm_runtime_resume_and_get(sdev->dev);
+	ret = pm_runtime_resume_and_get(dev);
 	if (ret)
 		return;
 
@@ -249,23 +246,8 @@ static void shmob_drm_crtc_start(struct shmob_drm_crtc *scrtc)
 	/* Setup geometry, format, frame buffer memory and operation mode. */
 	shmob_drm_crtc_setup_geometry(scrtc);
 
-	/* TODO: Handle YUV colorspaces. Hardcode REC709 for now. */
-	lcdc_write(sdev, LDDFR, format->lddfr | LDDFR_CF1);
-	lcdc_write(sdev, LDMLSR, scrtc->line_size);
-	lcdc_write(sdev, LDSA1R, scrtc->dma[0]);
-	if (shmob_drm_format_is_yuv(format))
-		lcdc_write(sdev, LDSA2R, scrtc->dma[1]);
 	lcdc_write(sdev, LDSM1R, 0);
 
-	/* Word and long word swap. */
-	lcdc_write(sdev, LDDDSR, format->ldddsr);
-
-	/* Setup planes. */
-	drm_for_each_legacy_plane(plane, dev) {
-		if (plane->crtc == crtc)
-			shmob_drm_plane_setup(plane);
-	}
-
 	/* Enable the display output. */
 	lcdc_write(sdev, LDCNT1R, LDCNT1R_DE);
 
@@ -317,42 +299,6 @@ void shmob_drm_crtc_resume(struct shmob_drm_crtc *scrtc)
 	shmob_drm_crtc_start(scrtc);
 }
 
-static void shmob_drm_crtc_compute_base(struct shmob_drm_crtc *scrtc,
-					int x, int y)
-{
-	struct drm_crtc *crtc = &scrtc->base;
-	struct drm_framebuffer *fb = crtc->primary->fb;
-	struct drm_gem_dma_object *gem;
-	unsigned int bpp;
-
-	bpp = shmob_drm_format_is_yuv(scrtc->format) ? 8 : scrtc->format->bpp;
-	gem = drm_fb_dma_get_gem_obj(fb, 0);
-	scrtc->dma[0] = gem->dma_addr + fb->offsets[0]
-		      + y * fb->pitches[0] + x * bpp / 8;
-
-	if (shmob_drm_format_is_yuv(scrtc->format)) {
-		bpp = scrtc->format->bpp - 8;
-		gem = drm_fb_dma_get_gem_obj(fb, 1);
-		scrtc->dma[1] = gem->dma_addr + fb->offsets[1]
-			      + y / (bpp == 4 ? 2 : 1) * fb->pitches[1]
-			      + x * (bpp == 16 ? 2 : 1);
-	}
-}
-
-static void shmob_drm_crtc_update_base(struct shmob_drm_crtc *scrtc)
-{
-	struct drm_crtc *crtc = &scrtc->base;
-	struct shmob_drm_device *sdev = to_shmob_device(crtc->dev);
-
-	shmob_drm_crtc_compute_base(scrtc, crtc->x, crtc->y);
-
-	lcdc_write_mirror(sdev, LDSA1R, scrtc->dma[0]);
-	if (shmob_drm_format_is_yuv(scrtc->format))
-		lcdc_write_mirror(sdev, LDSA2R, scrtc->dma[1]);
-
-	lcdc_write(sdev, LDRCNTR, lcdc_read(sdev, LDRCNTR) ^ LDRCNTR_MRS);
-}
-
 static inline struct shmob_drm_crtc *to_shmob_crtc(struct drm_crtc *crtc)
 {
 	return container_of(crtc, struct shmob_drm_crtc, base);
@@ -378,50 +324,45 @@ static void shmob_drm_crtc_mode_prepare(struct drm_crtc *crtc)
 	shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
 }
 
-static int shmob_drm_crtc_mode_set(struct drm_crtc *crtc,
-				   struct drm_display_mode *mode,
-				   struct drm_display_mode *adjusted_mode,
-				   int x, int y,
-				   struct drm_framebuffer *old_fb)
+static void shmob_drm_crtc_mode_commit(struct drm_crtc *crtc)
 {
-	struct shmob_drm_device *sdev = to_shmob_device(crtc->dev);
-	struct shmob_drm_crtc *scrtc = to_shmob_crtc(crtc);
-	const struct shmob_drm_format_info *format;
-
-	format = shmob_drm_format_info(crtc->primary->fb->format->format);
-	if (format == NULL) {
-		dev_dbg(sdev->dev, "mode_set: unsupported format %p4cc\n",
-			&crtc->primary->fb->format->format);
-		return -EINVAL;
-	}
-
-	scrtc->format = format;
-	scrtc->line_size = crtc->primary->fb->pitches[0];
-
-	shmob_drm_crtc_compute_base(scrtc, x, y);
+	shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
+}
 
+static int shmob_drm_crtc_atomic_check(struct drm_crtc *crtc,
+				       struct drm_atomic_state *state)
+{
 	return 0;
 }
 
-static void shmob_drm_crtc_mode_commit(struct drm_crtc *crtc)
+static void shmob_drm_crtc_atomic_begin(struct drm_crtc *crtc,
+					struct drm_atomic_state *state)
 {
-	shmob_drm_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
 }
 
-static int shmob_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
-					struct drm_framebuffer *old_fb)
+static void shmob_drm_crtc_atomic_flush(struct drm_crtc *crtc,
+					struct drm_atomic_state *state)
 {
-	shmob_drm_crtc_update_base(to_shmob_crtc(crtc));
+	struct drm_pending_vblank_event *event;
+	struct drm_device *dev = crtc->dev;
+	unsigned long flags;
 
-	return 0;
+	if (crtc->state->event) {
+		spin_lock_irqsave(&dev->event_lock, flags);
+		event = crtc->state->event;
+		crtc->state->event = NULL;
+		drm_crtc_send_vblank_event(crtc, event);
+		spin_unlock_irqrestore(&dev->event_lock, flags);
+	}
 }
 
 static const struct drm_crtc_helper_funcs crtc_helper_funcs = {
 	.dpms = shmob_drm_crtc_dpms,
 	.prepare = shmob_drm_crtc_mode_prepare,
 	.commit = shmob_drm_crtc_mode_commit,
-	.mode_set = shmob_drm_crtc_mode_set,
-	.mode_set_base = shmob_drm_crtc_mode_set_base,
+	.atomic_check = shmob_drm_crtc_atomic_check,
+	.atomic_begin = shmob_drm_crtc_atomic_begin,
+	.atomic_flush = shmob_drm_crtc_atomic_flush,
 };
 
 static int shmob_drm_crtc_page_flip(struct drm_crtc *crtc,
@@ -441,8 +382,7 @@ static int shmob_drm_crtc_page_flip(struct drm_crtc *crtc,
 	}
 	spin_unlock_irqrestore(&dev->event_lock, flags);
 
-	crtc->primary->fb = fb;
-	shmob_drm_crtc_update_base(scrtc);
+	drm_atomic_set_fb_for_plane(crtc->primary->state, fb);
 
 	if (event) {
 		event->pipe = 0;
@@ -489,9 +429,12 @@ static void shmob_drm_disable_vblank(struct drm_crtc *crtc)
 }
 
 static const struct drm_crtc_funcs crtc_funcs = {
+	.reset = drm_atomic_helper_crtc_reset,
 	.destroy = drm_crtc_cleanup,
-	.set_config = drm_crtc_helper_set_config,
+	.set_config = drm_atomic_helper_set_config,
 	.page_flip = shmob_drm_crtc_page_flip,
+	.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 	.enable_vblank = shmob_drm_enable_vblank,
 	.disable_vblank = shmob_drm_disable_vblank,
 };
@@ -627,8 +570,11 @@ static void shmob_drm_connector_destroy(struct drm_connector *connector)
 
 static const struct drm_connector_funcs connector_funcs = {
 	.dpms = drm_helper_connector_dpms,
+	.reset = drm_atomic_helper_connector_reset,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.destroy = shmob_drm_connector_destroy,
+	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
 };
 
 static struct drm_connector *

drivers/gpu/drm/renesas/shmobile/shmob_drm_crtc.h

@@ -29,9 +29,6 @@ struct shmob_drm_crtc {
 	wait_queue_head_t flip_wait;
 	int dpms;
 
-	const struct shmob_drm_format_info *format;
-	unsigned long dma[2];
-	unsigned int line_size;
 	bool started;
 };
 

drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c

@@ -16,7 +16,7 @@
 #include <linux/pm_runtime.h>
 #include <linux/slab.h>
 
-#include <drm/drm_crtc_helper.h>
+#include <drm/drm_atomic_helper.h>
 #include <drm/drm_drv.h>
 #include <drm/drm_fbdev_generic.h>
 #include <drm/drm_gem_dma_helper.h>
@@ -173,7 +173,7 @@ static void shmob_drm_remove(struct platform_device *pdev)
 	struct drm_device *ddev = &sdev->ddev;
 
 	drm_dev_unregister(ddev);
-	drm_helper_force_disable_all(ddev);
+	drm_atomic_helper_shutdown(ddev);
 	drm_kms_helper_poll_fini(ddev);
 }
 

drivers/gpu/drm/renesas/shmobile/shmob_drm_kms.c

@@ -7,6 +7,7 @@
  * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
  */
 
+#include <drm/drm_atomic_helper.h>
 #include <drm/drm_crtc.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_fourcc.h>
@@ -17,6 +18,7 @@
 #include "shmob_drm_crtc.h"
 #include "shmob_drm_drv.h"
 #include "shmob_drm_kms.h"
+#include "shmob_drm_plane.h"
 #include "shmob_drm_regs.h"
 
 /* -----------------------------------------------------------------------------
@@ -147,13 +149,16 @@ shmob_drm_fb_create(struct drm_device *dev, struct drm_file *file_priv,
 
 static const struct drm_mode_config_funcs shmob_drm_mode_config_funcs = {
 	.fb_create = shmob_drm_fb_create,
+	.atomic_check = drm_atomic_helper_check,
+	.atomic_commit = drm_atomic_helper_commit,
 };
 
 int shmob_drm_modeset_init(struct shmob_drm_device *sdev)
 {
+	struct drm_device *dev = &sdev->ddev;
 	int ret;
 
-	ret = drmm_mode_config_init(&sdev->ddev);
+	ret = drmm_mode_config_init(dev);
 	if (ret)
 		return ret;
 
@@ -169,7 +174,9 @@ int shmob_drm_modeset_init(struct shmob_drm_device *sdev)
 	if (ret < 0)
 		return ret;
 
-	drm_kms_helper_poll_init(&sdev->ddev);
+	drm_mode_config_reset(dev);
+
+	drm_kms_helper_poll_init(dev);
 
 	sdev->ddev.mode_config.min_width = 0;
 	sdev->ddev.mode_config.min_height = 0;
@@ -177,7 +184,5 @@ int shmob_drm_modeset_init(struct shmob_drm_device *sdev)
 	sdev->ddev.mode_config.max_height = 4095;
 	sdev->ddev.mode_config.funcs = &shmob_drm_mode_config_funcs;
 
-	drm_helper_disable_unused_functions(&sdev->ddev);
-
 	return 0;
 }

drivers/gpu/drm/renesas/shmobile/shmob_drm_plane.h

@@ -16,6 +16,5 @@ struct shmob_drm_device;
 struct drm_plane *shmob_drm_plane_create(struct shmob_drm_device *sdev,
 					 enum drm_plane_type type,
 					 unsigned int index);
-void shmob_drm_plane_setup(struct drm_plane *plane);
 
 #endif /* __SHMOB_DRM_PLANE_H__ */