4 files changed, 192 insertions, 105 deletions

diff --git a/drivers/gpu/drm/solomon/ssd130x-i2c.c b/drivers/gpu/drm/solomon/ssd130x-i2c.c
index 1e0fcec7be47..ddfa0bb5d9c9 100644
--- a/drivers/gpu/drm/solomon/ssd130x-i2c.c
+++ b/drivers/gpu/drm/solomon/ssd130x-i2c.c
@@ -39,13 +39,11 @@ static int ssd130x_i2c_probe(struct i2c_client *client)
 	return 0;
 }
 
-static int ssd130x_i2c_remove(struct i2c_client *client)
+static void ssd130x_i2c_remove(struct i2c_client *client)
 {
 	struct ssd130x_device *ssd130x = i2c_get_clientdata(client);
 
 	ssd130x_remove(ssd130x);
-
-	return 0;
 }
 
 static void ssd130x_i2c_shutdown(struct i2c_client *client)
diff --git a/drivers/gpu/drm/solomon/ssd130x-spi.c b/drivers/gpu/drm/solomon/ssd130x-spi.c
index 07802907e39a..19ab4942cb33 100644
--- a/drivers/gpu/drm/solomon/ssd130x-spi.c
+++ b/drivers/gpu/drm/solomon/ssd130x-spi.c
@@ -18,11 +18,6 @@ struct ssd130x_spi_transport {
 	struct gpio_desc *dc;
 };
 
-static const struct regmap_config ssd130x_spi_regmap_config = {
-	.reg_bits = 8,
-	.val_bits = 8,
-};
-
 /*
  * The regmap bus .write handler, it is just a wrapper around spi_write()
  * but toggling the Data/Command control pin (D/C#). Since for 4-wire SPI
@@ -56,17 +51,12 @@ static int ssd130x_spi_read(void *context, const void *reg, size_t reg_size,
 	return -EOPNOTSUPP;
 }
 
-/*
- * A custom bus is needed due the special write that toggles a D/C# pin,
- * another option could be to just have a .reg_write() callback but that
- * will prevent to do data writes in bulk.
- *
- * Once the regmap API is extended to support defining a bulk write handler
- * in the struct regmap_config, this can be simplified and the bus dropped.
- */
-static struct regmap_bus regmap_ssd130x_spi_bus = {
+static const struct regmap_config ssd130x_spi_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
 	.write = ssd130x_spi_write,
 	.read = ssd130x_spi_read,
+	.can_multi_write = true,
 };
 
 static int ssd130x_spi_probe(struct spi_device *spi)
@@ -90,8 +80,7 @@ static int ssd130x_spi_probe(struct spi_device *spi)
 	t->spi = spi;
 	t->dc = dc;
 
-	regmap = devm_regmap_init(dev, &regmap_ssd130x_spi_bus, t,
-				  &ssd130x_spi_regmap_config);
+	regmap = devm_regmap_init(dev, NULL, t, &ssd130x_spi_regmap_config);
 	if (IS_ERR(regmap))
 		return PTR_ERR(regmap);
 
diff --git a/drivers/gpu/drm/solomon/ssd130x.c b/drivers/gpu/drm/solomon/ssd130x.c
index 5a3e3b78cd9e..bc41a5ae810a 100644
--- a/drivers/gpu/drm/solomon/ssd130x.c
+++ b/drivers/gpu/drm/solomon/ssd130x.c
@@ -18,10 +18,10 @@
 #include <linux/pwm.h>
 #include <linux/regulator/consumer.h>
 
+#include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_damage_helper.h>
 #include <drm/drm_edid.h>
-#include <drm/drm_fb_cma_helper.h>
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_format_helper.h>
 #include <drm/drm_framebuffer.h>
@@ -537,11 +537,11 @@ static void ssd130x_clear_screen(struct ssd130x_device *ssd130x)
 	kfree(buf);
 }
 
-static int ssd130x_fb_blit_rect(struct drm_framebuffer *fb, const struct iosys_map *map,
+static int ssd130x_fb_blit_rect(struct drm_framebuffer *fb, const struct iosys_map *vmap,
 				struct drm_rect *rect)
 {
 	struct ssd130x_device *ssd130x = drm_to_ssd130x(fb->dev);
-	void *vmap = map->vaddr; /* TODO: Use mapping abstraction properly */
+	struct iosys_map dst;
 	unsigned int dst_pitch;
 	int ret = 0;
 	u8 *buf = NULL;
@@ -555,127 +555,174 @@ static int ssd130x_fb_blit_rect(struct drm_framebuffer *fb, const struct iosys_m
 	if (!buf)
 		return -ENOMEM;
 
-	drm_fb_xrgb8888_to_mono(buf, dst_pitch, vmap, fb, rect);
+	ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE);
+	if (ret)
+		goto out_free;
+
+	iosys_map_set_vaddr(&dst, buf);
+	drm_fb_xrgb8888_to_mono(&dst, &dst_pitch, vmap, fb, rect);
+
+	drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE);
 
 	ssd130x_update_rect(ssd130x, buf, rect);
 
+out_free:
 	kfree(buf);
 
 	return ret;
 }
 
-static int ssd130x_display_pipe_mode_valid(struct drm_simple_display_pipe *pipe,
-					   const struct drm_display_mode *mode)
+static void ssd130x_primary_plane_helper_atomic_update(struct drm_plane *plane,
+						       struct drm_atomic_state *state)
 {
-	struct ssd130x_device *ssd130x = drm_to_ssd130x(pipe->crtc.dev);
+	struct drm_plane_state *plane_state = drm_atomic_get_new_plane_state(state, plane);
+	struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(state, plane);
+	struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);
+	struct drm_device *drm = plane->dev;
+	struct drm_rect src_clip, dst_clip;
+	int idx;
 
-	if (mode->hdisplay != ssd130x->mode.hdisplay &&
-	    mode->vdisplay != ssd130x->mode.vdisplay)
-		return MODE_ONE_SIZE;
+	if (!drm_atomic_helper_damage_merged(old_plane_state, plane_state, &src_clip))
+		return;
 
-	if (mode->hdisplay != ssd130x->mode.hdisplay)
-		return MODE_ONE_WIDTH;
+	dst_clip = plane_state->dst;
+	if (!drm_rect_intersect(&dst_clip, &src_clip))
+		return;
 
-	if (mode->vdisplay != ssd130x->mode.vdisplay)
-		return MODE_ONE_HEIGHT;
+	if (!drm_dev_enter(drm, &idx))
+		return;
 
-	return MODE_OK;
+	ssd130x_fb_blit_rect(plane_state->fb, &shadow_plane_state->data[0], &dst_clip);
+
+	drm_dev_exit(idx);
 }
 
-static void ssd130x_display_pipe_enable(struct drm_simple_display_pipe *pipe,
-					struct drm_crtc_state *crtc_state,
-					struct drm_plane_state *plane_state)
+static void ssd130x_primary_plane_helper_atomic_disable(struct drm_plane *plane,
+							struct drm_atomic_state *state)
 {
-	struct ssd130x_device *ssd130x = drm_to_ssd130x(pipe->crtc.dev);
-	struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);
-	struct drm_device *drm = &ssd130x->drm;
-	int idx, ret;
+	struct drm_device *drm = plane->dev;
+	struct ssd130x_device *ssd130x = drm_to_ssd130x(drm);
+	int idx;
 
-	ret = ssd130x_power_on(ssd130x);
-	if (ret)
+	if (!drm_dev_enter(drm, &idx))
 		return;
 
-	ret = ssd130x_init(ssd130x);
-	if (ret)
-		goto out_power_off;
+	ssd130x_clear_screen(ssd130x);
 
-	if (!drm_dev_enter(drm, &idx))
-		goto out_power_off;
+	drm_dev_exit(idx);
+}
 
-	ssd130x_fb_blit_rect(plane_state->fb, &shadow_plane_state->data[0], &plane_state->dst);
+static const struct drm_plane_helper_funcs ssd130x_primary_plane_helper_funcs = {
+	DRM_GEM_SHADOW_PLANE_HELPER_FUNCS,
+	.atomic_check = drm_plane_helper_atomic_check,
+	.atomic_update = ssd130x_primary_plane_helper_atomic_update,
+	.atomic_disable = ssd130x_primary_plane_helper_atomic_disable,
+};
 
-	ssd130x_write_cmd(ssd130x, 1, SSD130X_DISPLAY_ON);
+static const struct drm_plane_funcs ssd130x_primary_plane_funcs = {
+	.update_plane = drm_atomic_helper_update_plane,
+	.disable_plane = drm_atomic_helper_disable_plane,
+	.destroy = drm_plane_cleanup,
+	DRM_GEM_SHADOW_PLANE_FUNCS,
+};
 
-	backlight_enable(ssd130x->bl_dev);
+static enum drm_mode_status ssd130x_crtc_helper_mode_valid(struct drm_crtc *crtc,
+							   const struct drm_display_mode *mode)
+{
+	struct ssd130x_device *ssd130x = drm_to_ssd130x(crtc->dev);
 
-	drm_dev_exit(idx);
+	if (mode->hdisplay != ssd130x->mode.hdisplay &&
+	    mode->vdisplay != ssd130x->mode.vdisplay)
+		return MODE_ONE_SIZE;
+	else if (mode->hdisplay != ssd130x->mode.hdisplay)
+		return MODE_ONE_WIDTH;
+	else if (mode->vdisplay != ssd130x->mode.vdisplay)
+		return MODE_ONE_HEIGHT;
 
-	return;
-out_power_off:
-	ssd130x_power_off(ssd130x);
+	return MODE_OK;
 }
 
-static void ssd130x_display_pipe_disable(struct drm_simple_display_pipe *pipe)
+static int ssd130x_crtc_helper_atomic_check(struct drm_crtc *crtc,
+					    struct drm_atomic_state *new_state)
 {
-	struct ssd130x_device *ssd130x = drm_to_ssd130x(pipe->crtc.dev);
-	struct drm_device *drm = &ssd130x->drm;
-	int idx;
+	struct drm_crtc_state *new_crtc_state = drm_atomic_get_new_crtc_state(new_state, crtc);
+	int ret;
 
-	if (!drm_dev_enter(drm, &idx))
-		return;
+	ret = drm_atomic_helper_check_crtc_state(new_crtc_state, false);
+	if (ret)
+		return ret;
 
-	ssd130x_clear_screen(ssd130x);
+	return drm_atomic_add_affected_planes(new_state, crtc);
+}
 
-	backlight_disable(ssd130x->bl_dev);
+/*
+ * The CRTC is always enabled. Screen updates are performed by
+ * the primary plane's atomic_update function. Disabling clears
+ * the screen in the primary plane's atomic_disable function.
+ */
+static const struct drm_crtc_helper_funcs ssd130x_crtc_helper_funcs = {
+	.mode_valid = ssd130x_crtc_helper_mode_valid,
+	.atomic_check = ssd130x_crtc_helper_atomic_check,
+};
 
-	ssd130x_write_cmd(ssd130x, 1, SSD130X_DISPLAY_OFF);
+static void ssd130x_crtc_reset(struct drm_crtc *crtc)
+{
+	struct drm_device *drm = crtc->dev;
+	struct ssd130x_device *ssd130x = drm_to_ssd130x(drm);
 
-	ssd130x_power_off(ssd130x);
+	ssd130x_init(ssd130x);
 
-	drm_dev_exit(idx);
+	drm_atomic_helper_crtc_reset(crtc);
 }
 
-static void ssd130x_display_pipe_update(struct drm_simple_display_pipe *pipe,
-					struct drm_plane_state *old_plane_state)
+static const struct drm_crtc_funcs ssd130x_crtc_funcs = {
+	.reset = ssd130x_crtc_reset,
+	.destroy = drm_crtc_cleanup,
+	.set_config = drm_atomic_helper_set_config,
+	.page_flip = drm_atomic_helper_page_flip,
+	.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
+};
+
+static void ssd130x_encoder_helper_atomic_enable(struct drm_encoder *encoder,
+						 struct drm_atomic_state *state)
 {
-	struct ssd130x_device *ssd130x = drm_to_ssd130x(pipe->crtc.dev);
-	struct drm_plane_state *plane_state = pipe->plane.state;
-	struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);
-	struct drm_framebuffer *fb = plane_state->fb;
-	struct drm_device *drm = &ssd130x->drm;
-	struct drm_rect src_clip, dst_clip;
-	int idx;
+	struct drm_device *drm = encoder->dev;
+	struct ssd130x_device *ssd130x = drm_to_ssd130x(drm);
+	int ret;
 
-	if (!fb)
+	ret = ssd130x_power_on(ssd130x);
+	if (ret)
 		return;
 
-	if (!pipe->crtc.state->active)
-		return;
+	ssd130x_write_cmd(ssd130x, 1, SSD130X_DISPLAY_ON);
 
-	if (!drm_atomic_helper_damage_merged(old_plane_state, plane_state, &src_clip))
-		return;
+	backlight_enable(ssd130x->bl_dev);
+}
 
-	dst_clip = plane_state->dst;
-	if (!drm_rect_intersect(&dst_clip, &src_clip))
-		return;
+static void ssd130x_encoder_helper_atomic_disable(struct drm_encoder *encoder,
+						  struct drm_atomic_state *state)
+{
+	struct drm_device *drm = encoder->dev;
+	struct ssd130x_device *ssd130x = drm_to_ssd130x(drm);
 
-	if (!drm_dev_enter(drm, &idx))
-		return;
+	backlight_disable(ssd130x->bl_dev);
 
-	ssd130x_fb_blit_rect(plane_state->fb, &shadow_plane_state->data[0], &dst_clip);
+	ssd130x_write_cmd(ssd130x, 1, SSD130X_DISPLAY_OFF);
 
-	drm_dev_exit(idx);
+	ssd130x_power_off(ssd130x);
 }
 
-static const struct drm_simple_display_pipe_funcs ssd130x_pipe_funcs = {
-	.mode_valid = ssd130x_display_pipe_mode_valid,
-	.enable = ssd130x_display_pipe_enable,
-	.disable = ssd130x_display_pipe_disable,
-	.update = ssd130x_display_pipe_update,
-	DRM_GEM_SIMPLE_DISPLAY_PIPE_SHADOW_PLANE_FUNCS,
+static const struct drm_encoder_helper_funcs ssd130x_encoder_helper_funcs = {
+	.atomic_enable = ssd130x_encoder_helper_atomic_enable,
+	.atomic_disable = ssd130x_encoder_helper_atomic_disable,
+};
+
+static const struct drm_encoder_funcs ssd130x_encoder_funcs = {
+	.destroy = drm_encoder_cleanup,
 };
 
-static int ssd130x_connector_get_modes(struct drm_connector *connector)
+static int ssd130x_connector_helper_get_modes(struct drm_connector *connector)
 {
 	struct ssd130x_device *ssd130x = drm_to_ssd130x(connector->dev);
 	struct drm_display_mode *mode;
@@ -695,7 +742,7 @@ static int ssd130x_connector_get_modes(struct drm_connector *connector)
 }
 
 static const struct drm_connector_helper_funcs ssd130x_connector_helper_funcs = {
-	.get_modes = ssd130x_connector_get_modes,
+	.get_modes = ssd130x_connector_helper_get_modes,
 };
 
 static const struct drm_connector_funcs ssd130x_connector_funcs = {
@@ -806,8 +853,16 @@ static int ssd130x_init_modeset(struct ssd130x_device *ssd130x)
 	struct device *dev = ssd130x->dev;
 	struct drm_device *drm = &ssd130x->drm;
 	unsigned long max_width, max_height;
+	struct drm_plane *primary_plane;
+	struct drm_crtc *crtc;
+	struct drm_encoder *encoder;
+	struct drm_connector *connector;
 	int ret;
 
+	/*
+	 * Modesetting
+	 */
+
 	ret = drmm_mode_config_init(drm);
 	if (ret) {
 		dev_err(dev, "DRM mode config init failed: %d\n", ret);
@@ -833,25 +888,65 @@ static int ssd130x_init_modeset(struct ssd130x_device *ssd130x)
 	drm->mode_config.preferred_depth = 32;
 	drm->mode_config.funcs = &ssd130x_mode_config_funcs;
 
-	ret = drm_connector_init(drm, &ssd130x->connector, &ssd130x_connector_funcs,
+	/* Primary plane */
+
+	primary_plane = &ssd130x->primary_plane;
+	ret = drm_universal_plane_init(drm, primary_plane, 0, &ssd130x_primary_plane_funcs,
+				       ssd130x_formats, ARRAY_SIZE(ssd130x_formats),
+				       NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
+	if (ret) {
+		dev_err(dev, "DRM primary plane init failed: %d\n", ret);
+		return ret;
+	}
+
+	drm_plane_helper_add(primary_plane, &ssd130x_primary_plane_helper_funcs);
+
+	drm_plane_enable_fb_damage_clips(primary_plane);
+
+	/* CRTC */
+
+	crtc = &ssd130x->crtc;
+	ret = drm_crtc_init_with_planes(drm, crtc, primary_plane, NULL,
+					&ssd130x_crtc_funcs, NULL);
+	if (ret) {
+		dev_err(dev, "DRM crtc init failed: %d\n", ret);
+		return ret;
+	}
+
+	drm_crtc_helper_add(crtc, &ssd130x_crtc_helper_funcs);
+
+	/* Encoder */
+
+	encoder = &ssd130x->encoder;
+	ret = drm_encoder_init(drm, encoder, &ssd130x_encoder_funcs,
+			       DRM_MODE_ENCODER_NONE, NULL);
+	if (ret) {
+		dev_err(dev, "DRM encoder init failed: %d\n", ret);
+		return ret;
+	}
+
+	drm_encoder_helper_add(encoder, &ssd130x_encoder_helper_funcs);
+
+	encoder->possible_crtcs = drm_crtc_mask(crtc);
+
+	/* Connector */
+
+	connector = &ssd130x->connector;
+	ret = drm_connector_init(drm, connector, &ssd130x_connector_funcs,
 				 DRM_MODE_CONNECTOR_Unknown);
 	if (ret) {
 		dev_err(dev, "DRM connector init failed: %d\n", ret);
 		return ret;
 	}
 
-	drm_connector_helper_add(&ssd130x->connector, &ssd130x_connector_helper_funcs);
+	drm_connector_helper_add(connector, &ssd130x_connector_helper_funcs);
 
-	ret = drm_simple_display_pipe_init(drm, &ssd130x->pipe, &ssd130x_pipe_funcs,
-					   ssd130x_formats, ARRAY_SIZE(ssd130x_formats),
-					   NULL, &ssd130x->connector);
+	ret = drm_connector_attach_encoder(connector, encoder);
 	if (ret) {
-		dev_err(dev, "DRM simple display pipeline init failed: %d\n", ret);
+		dev_err(dev, "DRM attach connector to encoder failed: %d\n", ret);
 		return ret;
 	}
 
-	drm_plane_enable_fb_damage_clips(&ssd130x->pipe.plane);
-
 	drm_mode_config_reset(drm);
 
 	return 0;
diff --git a/drivers/gpu/drm/solomon/ssd130x.h b/drivers/gpu/drm/solomon/ssd130x.h
index 4c4a84e962e7..03038c1b6476 100644
--- a/drivers/gpu/drm/solomon/ssd130x.h
+++ b/drivers/gpu/drm/solomon/ssd130x.h
@@ -13,8 +13,11 @@
 #ifndef __SSD1307X_H__
 #define __SSD1307X_H__
 
+#include <drm/drm_connector.h>
+#include <drm/drm_crtc.h>
 #include <drm/drm_drv.h>
-#include <drm/drm_simple_kms_helper.h>
+#include <drm/drm_encoder.h>
+#include <drm/drm_plane_helper.h>
 
 #include <linux/regmap.h>
 
@@ -42,8 +45,10 @@ struct ssd130x_deviceinfo {
 struct ssd130x_device {
 	struct drm_device drm;
 	struct device *dev;
-	struct drm_simple_display_pipe pipe;
 	struct drm_display_mode mode;
+	struct drm_plane primary_plane;
+	struct drm_crtc crtc;
+	struct drm_encoder encoder;
 	struct drm_connector connector;
 	struct i2c_client *client;