[PATCH v5 0/4] drm/solomon: Add support for the SSD133x controller family

[PATCH v5 0/4] drm/solomon: Add support for the SSD133x controller family

[Javier Martinez Canillas]

Hello,

This patch-set adds support for the family of SSD133x Solomon controllers,
such as the SSD1331. These are used for RGB Dot Matrix OLED/PLED panels.

This is a v5 that is basically the same than the previous v4 but dropping
support for I2C since the ssd133x family does not support that interface.

The patches were tested on a Waveshare SSD1331 display using glmark2-drm,
fbcon, fbtests and the retroarch emulator. The binding schema were tested
using the `make W=1 dt_binding_check` target.

Patch #1 and #2 are fixes for the DT binding schema of the existing SSD130x
and SSD132x families.

Patch #3 adds a DT binding schema for the SSD133x controllers and patch #4
extends the ssd130x DRM driver to support the SSD133x controller family.

Best regards,
Javier

Changes in v5:
- Drop I2C example in DT binding schema due that bus not being supported.
- Drop "solomon,ssd1331" entry from ssd130x-i2c due I2C bus not being supported.

Changes in v4:
- Fix typo in commit message (Jocelyn Falempe).
- Add collected tags.

Changes in v3:
- Move solomon,ssd-common.yaml ref before the properties section and
  width/height constraints after the other properties (Conor Dooley).

Changes in v2:
- Unconditionally set the width and height constraints (Conor Dooley).
- Fix indentation in the DTS examples (Krzysztof Kozlowski).

Javier Martinez Canillas (4):
  dt-bindings: display: ssd1307fb: Add vendor prefix to width and height
  dt-bindings: display: ssd132x: Add vendor prefix to width and height
  dt-bindings: display: Add SSD133x OLED controllers
  drm/ssd130x: Add support for the SSD133x OLED controller family

 .../bindings/display/solomon,ssd1307fb.yaml   |  20 +-
 .../bindings/display/solomon,ssd132x.yaml     |  12 +-
 .../bindings/display/solomon,ssd133x.yaml     |  45 +++
 drivers/gpu/drm/solomon/ssd130x-spi.c         |   7 +
 drivers/gpu/drm/solomon/ssd130x.c             | 370 ++++++++++++++++++
 drivers/gpu/drm/solomon/ssd130x.h             |   5 +-
 6 files changed, 442 insertions(+), 17 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/display/solomon,ssd133x.yaml

-- 
2.43.0

[PATCH v5 1/4] dt-bindings: display: ssd1307fb: Add vendor prefix to width and height

[Javier Martinez Canillas]

The commit 591825fba8a2 ("dt-bindings: display: ssd1307fb: Remove default
width and height values") used the wrong properties for width and height,
instead of the correct "solomon,width" and "solomon,height" properties.

Fix this by adding the vendor prefix to the width and height properties.

Fixes: 591825fba8a2 ("dt-bindings: display: ssd1307fb: Remove default width and height values")
Reported-by: Conor Dooley <conor@kernel.org>
Closes: https://lore.kernel.org/dri-devel/20231218-example-envision-b41ca8efa251@spud/
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Acked-by: Rob Herring <robh@kernel.org>
---

(no changes since v1)

 .../bindings/display/solomon,ssd1307fb.yaml   | 20 +++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/solomon,ssd1307fb.yaml b/Documentation/devicetree/bindings/display/solomon,ssd1307fb.yaml
index 3afbb52d1b7f..153ff86fb405 100644
--- a/Documentation/devicetree/bindings/display/solomon,ssd1307fb.yaml
+++ b/Documentation/devicetree/bindings/display/solomon,ssd1307fb.yaml
@@ -131,9 +131,9 @@ allOf:
             const: sinowealth,sh1106
     then:
       properties:
-        width:
+        solomon,width:
           default: 132
-        height:
+        solomon,height:
           default: 64
         solomon,dclk-div:
           default: 1
@@ -149,9 +149,9 @@ allOf:
               - solomon,ssd1305
     then:
       properties:
-        width:
+        solomon,width:
           default: 132
-        height:
+        solomon,height:
           default: 64
         solomon,dclk-div:
           default: 1
@@ -167,9 +167,9 @@ allOf:
               - solomon,ssd1306
     then:
       properties:
-        width:
+        solomon,width:
           default: 128
-        height:
+        solomon,height:
           default: 64
         solomon,dclk-div:
           default: 1
@@ -185,9 +185,9 @@ allOf:
               - solomon,ssd1307
     then:
       properties:
-        width:
+        solomon,width:
           default: 128
-        height:
+        solomon,height:
           default: 39
         solomon,dclk-div:
           default: 2
@@ -205,9 +205,9 @@ allOf:
               - solomon,ssd1309
     then:
       properties:
-        width:
+        solomon,width:
           default: 128
-        height:
+        solomon,height:
           default: 64
         solomon,dclk-div:
           default: 1
-- 
2.43.0

[PATCH v5 2/4] dt-bindings: display: ssd132x: Add vendor prefix to width and height

[Javier Martinez Canillas]

Commit 2d23e7d6bacb ("dt-bindings: display: Add SSD132x OLED controllers")
used the wrong properties for width and height, instead of the correct
"solomon,width" and "solomon,height" properties.

Fix this by adding the vendor prefix to the width and height properties.

Fixes: 2d23e7d6bacb ("dt-bindings: display: Add SSD132x OLED controllers")
Reported-by: Conor Dooley <conor@kernel.org>
Closes: https://lore.kernel.org/dri-devel/20231218-example-envision-b41ca8efa251@spud/
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Acked-by: Rob Herring <robh@kernel.org>
---

(no changes since v1)

 .../devicetree/bindings/display/solomon,ssd132x.yaml | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/solomon,ssd132x.yaml b/Documentation/devicetree/bindings/display/solomon,ssd132x.yaml
index 37975ee61c5a..dd7939989cf4 100644
--- a/Documentation/devicetree/bindings/display/solomon,ssd132x.yaml
+++ b/Documentation/devicetree/bindings/display/solomon,ssd132x.yaml
@@ -30,9 +30,9 @@ allOf:
             const: solomon,ssd1322
     then:
       properties:
-        width:
+        solomon,width:
           default: 480
-        height:
+        solomon,height:
           default: 128
 
   - if:
@@ -42,9 +42,9 @@ allOf:
             const: solomon,ssd1325
     then:
       properties:
-        width:
+        solomon,width:
           default: 128
-        height:
+        solomon,height:
           default: 80
 
   - if:
@@ -54,9 +54,9 @@ allOf:
             const: solomon,ssd1327
     then:
       properties:
-        width:
+        solomon,width:
           default: 128
-        height:
+        solomon,height:
           default: 128
 
 unevaluatedProperties: false
-- 
2.43.0

[PATCH v5 3/4] dt-bindings: display: Add SSD133x OLED controllers

[Javier Martinez Canillas]

Add a Device Tree binding schema for the OLED panels based on the
Solomon SSD133x family of controllers.

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---

Changes in v5:
- Drop I2C example in DT binding schema due that bus not being supported.

Changes in v3:
- Move solomon,ssd-common.yaml ref before the properties section and
  width/height constraints after the other properties (Conor Dooley).

Changes in v2:
- Unconditionally set the width and height constraints (Conor Dooley).
- Fix indentation in the DTS examples (Krzysztof Kozlowski).

 .../bindings/display/solomon,ssd133x.yaml     | 45 +++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/solomon,ssd133x.yaml

diff --git a/Documentation/devicetree/bindings/display/solomon,ssd133x.yaml b/Documentation/devicetree/bindings/display/solomon,ssd133x.yaml
new file mode 100644
index 000000000000..b7780038a34b
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/solomon,ssd133x.yaml
@@ -0,0 +1,45 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/solomon,ssd133x.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Solomon SSD133x OLED Display Controllers
+
+maintainers:
+  - Javier Martinez Canillas <javierm@redhat.com>
+
+allOf:
+  - $ref: solomon,ssd-common.yaml#
+
+properties:
+  compatible:
+    enum:
+      - solomon,ssd1331
+
+  solomon,width:
+    default: 96
+
+  solomon,height:
+    default: 64
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        oled@0 {
+            compatible = "solomon,ssd1331";
+            reg = <0x0>;
+            reset-gpios = <&gpio2 7>;
+            dc-gpios = <&gpio2 8>;
+            spi-max-frequency = <10000000>;
+        };
+    };
-- 
2.43.0

[PATCH v5 4/4] drm/ssd130x: Add support for the SSD133x OLED controller family

[Javier Martinez Canillas]

The Solomon SSD133x controllers (such as the SSD1331) are used by RGB dot
matrix OLED panels, add a modesetting pipeline to support the chip family.

The SSD133x controllers support 256 (8-bit) and 65k (16-bit) color depths
but only the 256-color mode (DRM_FORMAT_RGB332) is implemented for now.

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
---

Changes in v5:
- Drop "solomon,ssd1331" entry from ssd130x-i2c due I2C bus not being supported.

Changes in v4:
- Fix typo in commit message (Jocelyn Falempe).

 drivers/gpu/drm/solomon/ssd130x-spi.c |   7 +
 drivers/gpu/drm/solomon/ssd130x.c     | 370 ++++++++++++++++++++++++++
 drivers/gpu/drm/solomon/ssd130x.h     |   5 +-
 3 files changed, 381 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/solomon/ssd130x-spi.c b/drivers/gpu/drm/solomon/ssd130x-spi.c
index 84e035a7ab3f..84bfde31d172 100644
--- a/drivers/gpu/drm/solomon/ssd130x-spi.c
+++ b/drivers/gpu/drm/solomon/ssd130x-spi.c
@@ -142,6 +142,11 @@ static const struct of_device_id ssd130x_of_match[] = {
 		.compatible = "solomon,ssd1327",
 		.data = &ssd130x_variants[SSD1327_ID],
 	},
+	/* ssd133x family */
+	{
+		.compatible = "solomon,ssd1331",
+		.data = &ssd130x_variants[SSD1331_ID],
+	},
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, ssd130x_of_match);
@@ -166,6 +171,8 @@ static const struct spi_device_id ssd130x_spi_table[] = {
 	{ "ssd1322", SSD1322_ID },
 	{ "ssd1325", SSD1325_ID },
 	{ "ssd1327", SSD1327_ID },
+	/* ssd133x family */
+	{ "ssd1331", SSD1331_ID },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(spi, ssd130x_spi_table);
diff --git a/drivers/gpu/drm/solomon/ssd130x.c b/drivers/gpu/drm/solomon/ssd130x.c
index bef293922b98..447d0c7c88c6 100644
--- a/drivers/gpu/drm/solomon/ssd130x.c
+++ b/drivers/gpu/drm/solomon/ssd130x.c
@@ -119,6 +119,26 @@
 #define SSD130X_SET_VCOMH_VOLTAGE		0xbe
 #define SSD132X_SET_FUNCTION_SELECT_B		0xd5
 
+/* ssd133x commands */
+#define SSD133X_SET_COL_RANGE			0x15
+#define SSD133X_SET_ROW_RANGE			0x75
+#define SSD133X_CONTRAST_A			0x81
+#define SSD133X_CONTRAST_B			0x82
+#define SSD133X_CONTRAST_C			0x83
+#define SSD133X_SET_MASTER_CURRENT		0x87
+#define SSD132X_SET_PRECHARGE_A			0x8a
+#define SSD132X_SET_PRECHARGE_B			0x8b
+#define SSD132X_SET_PRECHARGE_C			0x8c
+#define SSD133X_SET_DISPLAY_START		0xa1
+#define SSD133X_SET_DISPLAY_OFFSET		0xa2
+#define SSD133X_SET_DISPLAY_NORMAL		0xa4
+#define SSD133X_SET_MASTER_CONFIG		0xad
+#define SSD133X_POWER_SAVE_MODE			0xb0
+#define SSD133X_PHASES_PERIOD			0xb1
+#define SSD133X_SET_CLOCK_FREQ			0xb3
+#define SSD133X_SET_PRECHARGE_VOLTAGE		0xbb
+#define SSD133X_SET_VCOMH_VOLTAGE		0xbe
+
 #define MAX_CONTRAST 255
 
 const struct ssd130x_deviceinfo ssd130x_variants[] = {
@@ -180,6 +200,12 @@ const struct ssd130x_deviceinfo ssd130x_variants[] = {
 		.default_width = 128,
 		.default_height = 128,
 		.family_id = SSD132X_FAMILY,
+	},
+	/* ssd133x family */
+	[SSD1331_ID] = {
+		.default_width = 96,
+		.default_height = 64,
+		.family_id = SSD133X_FAMILY,
 	}
 };
 EXPORT_SYMBOL_NS_GPL(ssd130x_variants, DRM_SSD130X);
@@ -589,6 +615,117 @@ static int ssd132x_init(struct ssd130x_device *ssd130x)
 	return 0;
 }
 
+static int ssd133x_init(struct ssd130x_device *ssd130x)
+{
+	int ret;
+
+	/* Set color A contrast */
+	ret = ssd130x_write_cmd(ssd130x, 2, SSD133X_CONTRAST_A, 0x91);
+	if (ret < 0)
+		return ret;
+
+	/* Set color B contrast */
+	ret = ssd130x_write_cmd(ssd130x, 2, SSD133X_CONTRAST_B, 0x50);
+	if (ret < 0)
+		return ret;
+
+	/* Set color C contrast */
+	ret = ssd130x_write_cmd(ssd130x, 2, SSD133X_CONTRAST_C, 0x7d);
+	if (ret < 0)
+		return ret;
+
+	/* Set master current */
+	ret = ssd130x_write_cmd(ssd130x, 2, SSD133X_SET_MASTER_CURRENT, 0x06);
+	if (ret < 0)
+		return ret;
+
+	/* Set column start and end */
+	ret = ssd130x_write_cmd(ssd130x, 3, SSD133X_SET_COL_RANGE, 0x00, ssd130x->width - 1);
+	if (ret < 0)
+		return ret;
+
+	/* Set row start and end */
+	ret = ssd130x_write_cmd(ssd130x, 3, SSD133X_SET_ROW_RANGE, 0x00, ssd130x->height - 1);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * Horizontal Address Increment
+	 * Normal order SA,SB,SC (e.g. RGB)
+	 * COM Split Odd Even
+	 * 256 color format
+	 */
+	ret = ssd130x_write_cmd(ssd130x, 2, SSD13XX_SET_SEG_REMAP, 0x20);
+	if (ret < 0)
+		return ret;
+
+	/* Set display start and offset */
+	ret = ssd130x_write_cmd(ssd130x, 2, SSD133X_SET_DISPLAY_START, 0x00);
+	if (ret < 0)
+		return ret;
+
+	ret = ssd130x_write_cmd(ssd130x, 2, SSD133X_SET_DISPLAY_OFFSET, 0x00);
+	if (ret < 0)
+		return ret;
+
+	/* Set display mode normal */
+	ret = ssd130x_write_cmd(ssd130x, 1, SSD133X_SET_DISPLAY_NORMAL);
+	if (ret < 0)
+		return ret;
+
+	/* Set multiplex ratio value */
+	ret = ssd130x_write_cmd(ssd130x, 2, SSD13XX_SET_MULTIPLEX_RATIO, ssd130x->height - 1);
+	if (ret < 0)
+		return ret;
+
+	/* Set master configuration */
+	ret = ssd130x_write_cmd(ssd130x, 2, SSD133X_SET_MASTER_CONFIG, 0x8e);
+	if (ret < 0)
+		return ret;
+
+	/* Set power mode */
+	ret = ssd130x_write_cmd(ssd130x, 2, SSD133X_POWER_SAVE_MODE, 0x0b);
+	if (ret < 0)
+		return ret;
+
+	/* Set Phase 1 and 2 period */
+	ret = ssd130x_write_cmd(ssd130x, 2, SSD133X_PHASES_PERIOD, 0x31);
+	if (ret < 0)
+		return ret;
+
+	/* Set clock divider */
+	ret = ssd130x_write_cmd(ssd130x, 2, SSD133X_SET_CLOCK_FREQ, 0xf0);
+	if (ret < 0)
+		return ret;
+
+	/* Set pre-charge A */
+	ret = ssd130x_write_cmd(ssd130x, 2, SSD132X_SET_PRECHARGE_A, 0x64);
+	if (ret < 0)
+		return ret;
+
+	/* Set pre-charge B */
+	ret = ssd130x_write_cmd(ssd130x, 2, SSD132X_SET_PRECHARGE_B, 0x78);
+	if (ret < 0)
+		return ret;
+
+	/* Set pre-charge C */
+	ret = ssd130x_write_cmd(ssd130x, 2, SSD132X_SET_PRECHARGE_C, 0x64);
+	if (ret < 0)
+		return ret;
+
+	/* Set pre-charge level */
+	ret = ssd130x_write_cmd(ssd130x, 2, SSD133X_SET_PRECHARGE_VOLTAGE, 0x3a);
+	if (ret < 0)
+		return ret;
+
+	/* Set VCOMH voltage */
+	ret = ssd130x_write_cmd(ssd130x, 2, SSD133X_SET_VCOMH_VOLTAGE, 0x3e);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
 static int ssd130x_update_rect(struct ssd130x_device *ssd130x,
 			       struct drm_rect *rect, u8 *buf,
 			       u8 *data_array)
@@ -753,6 +890,47 @@ static int ssd132x_update_rect(struct ssd130x_device *ssd130x,
 	return ret;
 }
 
+static int ssd133x_update_rect(struct ssd130x_device *ssd130x,
+			       struct drm_rect *rect, u8 *data_array,
+			       unsigned int pitch)
+{
+	unsigned int x = rect->x1;
+	unsigned int y = rect->y1;
+	unsigned int columns = drm_rect_width(rect);
+	unsigned int rows = drm_rect_height(rect);
+	int ret;
+
+	/*
+	 * The screen is divided in Segment and Common outputs, where
+	 * COM0 to COM[N - 1] are the rows and SEG0 to SEG[M - 1] are
+	 * the columns.
+	 *
+	 * Each Segment has a 8-bit pixel and each Common output has a
+	 * row of pixels. When using the (default) horizontal address
+	 * increment mode, each byte of data sent to the controller has
+	 * a Segment (e.g: SEG0).
+	 *
+	 * When using the 256 color depth format, each pixel contains 3
+	 * sub-pixels for color A, B and C. These have 3 bit, 3 bit and
+	 * 2 bits respectively.
+	 */
+
+	/* Set column start and end */
+	ret = ssd130x_write_cmd(ssd130x, 3, SSD133X_SET_COL_RANGE, x, columns - 1);
+	if (ret < 0)
+		return ret;
+
+	/* Set row start and end */
+	ret = ssd130x_write_cmd(ssd130x, 3, SSD133X_SET_ROW_RANGE, y, rows - 1);
+	if (ret < 0)
+		return ret;
+
+	/* Write out update in one go since horizontal addressing mode is used */
+	ret = ssd130x_write_data(ssd130x, data_array, pitch * rows);
+
+	return ret;
+}
+
 static void ssd130x_clear_screen(struct ssd130x_device *ssd130x, u8 *data_array)
 {
 	unsigned int pages = DIV_ROUND_UP(ssd130x->height, SSD130X_PAGE_HEIGHT);
@@ -805,6 +983,22 @@ static void ssd132x_clear_screen(struct ssd130x_device *ssd130x, u8 *data_array)
 	ssd130x_write_data(ssd130x, data_array, columns * height);
 }
 
+static void ssd133x_clear_screen(struct ssd130x_device *ssd130x, u8 *data_array)
+{
+	const struct drm_format_info *fi = drm_format_info(DRM_FORMAT_RGB332);
+	unsigned int pitch;
+
+	if (!fi)
+		return;
+
+	pitch = drm_format_info_min_pitch(fi, 0, ssd130x->width);
+
+	memset(data_array, 0, pitch * ssd130x->height);
+
+	/* Write out update in one go since horizontal addressing mode is used */
+	ssd130x_write_data(ssd130x, data_array, pitch * ssd130x->height);
+}
+
 static int ssd130x_fb_blit_rect(struct drm_framebuffer *fb,
 				const struct iosys_map *vmap,
 				struct drm_rect *rect,
@@ -866,6 +1060,36 @@ static int ssd132x_fb_blit_rect(struct drm_framebuffer *fb,
 	return ret;
 }
 
+static int ssd133x_fb_blit_rect(struct drm_framebuffer *fb,
+				const struct iosys_map *vmap,
+				struct drm_rect *rect, u8 *data_array,
+				struct drm_format_conv_state *fmtcnv_state)
+{
+	struct ssd130x_device *ssd130x = drm_to_ssd130x(fb->dev);
+	const struct drm_format_info *fi = drm_format_info(DRM_FORMAT_RGB332);
+	unsigned int dst_pitch;
+	struct iosys_map dst;
+	int ret = 0;
+
+	if (!fi)
+		return -EINVAL;
+
+	dst_pitch = drm_format_info_min_pitch(fi, 0, drm_rect_width(rect));
+
+	ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE);
+	if (ret)
+		return ret;
+
+	iosys_map_set_vaddr(&dst, data_array);
+	drm_fb_xrgb8888_to_rgb332(&dst, &dst_pitch, vmap, fb, rect, fmtcnv_state);
+
+	drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE);
+
+	ssd133x_update_rect(ssd130x, rect, data_array, dst_pitch);
+
+	return ret;
+}
+
 static int ssd130x_primary_plane_atomic_check(struct drm_plane *plane,
 					      struct drm_atomic_state *state)
 {
@@ -964,6 +1188,29 @@ static int ssd132x_primary_plane_atomic_check(struct drm_plane *plane,
 	return 0;
 }
 
+static int ssd133x_primary_plane_atomic_check(struct drm_plane *plane,
+					      struct drm_atomic_state *state)
+{
+	struct drm_plane_state *plane_state = drm_atomic_get_new_plane_state(state, plane);
+	struct drm_crtc *crtc = plane_state->crtc;
+	struct drm_crtc_state *crtc_state = NULL;
+	int ret;
+
+	if (crtc)
+		crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+
+	ret = drm_atomic_helper_check_plane_state(plane_state, crtc_state,
+						  DRM_PLANE_NO_SCALING,
+						  DRM_PLANE_NO_SCALING,
+						  false, false);
+	if (ret)
+		return ret;
+	else if (!plane_state->visible)
+		return 0;
+
+	return 0;
+}
+
 static void ssd130x_primary_plane_atomic_update(struct drm_plane *plane,
 						struct drm_atomic_state *state)
 {
@@ -1034,6 +1281,39 @@ static void ssd132x_primary_plane_atomic_update(struct drm_plane *plane,
 	drm_dev_exit(idx);
 }
 
+static void ssd133x_primary_plane_atomic_update(struct drm_plane *plane,
+						struct drm_atomic_state *state)
+{
+	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_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, plane_state->crtc);
+	struct ssd130x_crtc_state *ssd130x_crtc_state =  to_ssd130x_crtc_state(crtc_state);
+	struct drm_framebuffer *fb = plane_state->fb;
+	struct drm_atomic_helper_damage_iter iter;
+	struct drm_device *drm = plane->dev;
+	struct drm_rect dst_clip;
+	struct drm_rect damage;
+	int idx;
+
+	if (!drm_dev_enter(drm, &idx))
+		return;
+
+	drm_atomic_helper_damage_iter_init(&iter, old_plane_state, plane_state);
+	drm_atomic_for_each_plane_damage(&iter, &damage) {
+		dst_clip = plane_state->dst;
+
+		if (!drm_rect_intersect(&dst_clip, &damage))
+			continue;
+
+		ssd133x_fb_blit_rect(fb, &shadow_plane_state->data[0], &dst_clip,
+				     ssd130x_crtc_state->data_array,
+				     &shadow_plane_state->fmtcnv_state);
+	}
+
+	drm_dev_exit(idx);
+}
+
 static void ssd130x_primary_plane_atomic_disable(struct drm_plane *plane,
 						 struct drm_atomic_state *state)
 {
@@ -1082,6 +1362,30 @@ static void ssd132x_primary_plane_atomic_disable(struct drm_plane *plane,
 	drm_dev_exit(idx);
 }
 
+static void ssd133x_primary_plane_atomic_disable(struct drm_plane *plane,
+						 struct drm_atomic_state *state)
+{
+	struct drm_device *drm = plane->dev;
+	struct ssd130x_device *ssd130x = drm_to_ssd130x(drm);
+	struct drm_plane_state *plane_state = drm_atomic_get_new_plane_state(state, plane);
+	struct drm_crtc_state *crtc_state;
+	struct ssd130x_crtc_state *ssd130x_crtc_state;
+	int idx;
+
+	if (!plane_state->crtc)
+		return;
+
+	crtc_state = drm_atomic_get_new_crtc_state(state, plane_state->crtc);
+	ssd130x_crtc_state = to_ssd130x_crtc_state(crtc_state);
+
+	if (!drm_dev_enter(drm, &idx))
+		return;
+
+	ssd133x_clear_screen(ssd130x, ssd130x_crtc_state->data_array);
+
+	drm_dev_exit(idx);
+}
+
 /* Called during init to allocate the plane's atomic state. */
 static void ssd130x_primary_plane_reset(struct drm_plane *plane)
 {
@@ -1144,6 +1448,12 @@ static const struct drm_plane_helper_funcs ssd130x_primary_plane_helper_funcs[]
 		.atomic_check = ssd132x_primary_plane_atomic_check,
 		.atomic_update = ssd132x_primary_plane_atomic_update,
 		.atomic_disable = ssd132x_primary_plane_atomic_disable,
+	},
+	[SSD133X_FAMILY] = {
+		DRM_GEM_SHADOW_PLANE_HELPER_FUNCS,
+		.atomic_check = ssd133x_primary_plane_atomic_check,
+		.atomic_update = ssd133x_primary_plane_atomic_update,
+		.atomic_disable = ssd133x_primary_plane_atomic_disable,
 	}
 };
 
@@ -1214,6 +1524,33 @@ static int ssd132x_crtc_atomic_check(struct drm_crtc *crtc,
 	return 0;
 }
 
+static int ssd133x_crtc_atomic_check(struct drm_crtc *crtc,
+				     struct drm_atomic_state *state)
+{
+	struct drm_device *drm = crtc->dev;
+	struct ssd130x_device *ssd130x = drm_to_ssd130x(drm);
+	struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
+	struct ssd130x_crtc_state *ssd130x_state = to_ssd130x_crtc_state(crtc_state);
+	const struct drm_format_info *fi = drm_format_info(DRM_FORMAT_RGB332);
+	unsigned int pitch;
+	int ret;
+
+	if (!fi)
+		return -EINVAL;
+
+	ret = drm_crtc_helper_atomic_check(crtc, state);
+	if (ret)
+		return ret;
+
+	pitch = drm_format_info_min_pitch(fi, 0, ssd130x->width);
+
+	ssd130x_state->data_array = kmalloc(pitch * ssd130x->height, GFP_KERNEL);
+	if (!ssd130x_state->data_array)
+		return -ENOMEM;
+
+	return 0;
+}
+
 /* Called during init to allocate the CRTC's atomic state. */
 static void ssd130x_crtc_reset(struct drm_crtc *crtc)
 {
@@ -1275,6 +1612,10 @@ static const struct drm_crtc_helper_funcs ssd130x_crtc_helper_funcs[] = {
 		.mode_valid = ssd130x_crtc_mode_valid,
 		.atomic_check = ssd132x_crtc_atomic_check,
 	},
+	[SSD133X_FAMILY] = {
+		.mode_valid = ssd130x_crtc_mode_valid,
+		.atomic_check = ssd133x_crtc_atomic_check,
+	},
 };
 
 static const struct drm_crtc_funcs ssd130x_crtc_funcs = {
@@ -1337,6 +1678,31 @@ static void ssd132x_encoder_atomic_enable(struct drm_encoder *encoder,
 	ssd130x_power_off(ssd130x);
 }
 
+static void ssd133x_encoder_atomic_enable(struct drm_encoder *encoder,
+					  struct drm_atomic_state *state)
+{
+	struct drm_device *drm = encoder->dev;
+	struct ssd130x_device *ssd130x = drm_to_ssd130x(drm);
+	int ret;
+
+	ret = ssd130x_power_on(ssd130x);
+	if (ret)
+		return;
+
+	ret = ssd133x_init(ssd130x);
+	if (ret)
+		goto power_off;
+
+	ssd130x_write_cmd(ssd130x, 1, SSD13XX_DISPLAY_ON);
+
+	backlight_enable(ssd130x->bl_dev);
+
+	return;
+
+power_off:
+	ssd130x_power_off(ssd130x);
+}
+
 static void ssd130x_encoder_atomic_disable(struct drm_encoder *encoder,
 					   struct drm_atomic_state *state)
 {
@@ -1358,6 +1724,10 @@ static const struct drm_encoder_helper_funcs ssd130x_encoder_helper_funcs[] = {
 	[SSD132X_FAMILY] = {
 		.atomic_enable = ssd132x_encoder_atomic_enable,
 		.atomic_disable = ssd130x_encoder_atomic_disable,
+	},
+	[SSD133X_FAMILY] = {
+		.atomic_enable = ssd133x_encoder_atomic_enable,
+		.atomic_disable = ssd130x_encoder_atomic_disable,
 	}
 };
 
diff --git a/drivers/gpu/drm/solomon/ssd130x.h b/drivers/gpu/drm/solomon/ssd130x.h
index 075c5c3ee75a..a4554018bb2a 100644
--- a/drivers/gpu/drm/solomon/ssd130x.h
+++ b/drivers/gpu/drm/solomon/ssd130x.h
@@ -25,7 +25,8 @@
 
 enum ssd130x_family_ids {
 	SSD130X_FAMILY,
-	SSD132X_FAMILY
+	SSD132X_FAMILY,
+	SSD133X_FAMILY
 };
 
 enum ssd130x_variants {
@@ -39,6 +40,8 @@ enum ssd130x_variants {
 	SSD1322_ID,
 	SSD1325_ID,
 	SSD1327_ID,
+	/* ssd133x family */
+	SSD1331_ID,
 	NR_SSD130X_VARIANTS
 };
 
-- 
2.43.0

Re: [PATCH v5 0/4] drm/solomon: Add support for the SSD133x controller family

[Javier Martinez Canillas]

Javier Martinez Canillas <javierm@redhat.com> writes:

> Hello,
>
> This patch-set adds support for the family of SSD133x Solomon controllers,
> such as the SSD1331. These are used for RGB Dot Matrix OLED/PLED panels.
>
> This is a v5 that is basically the same than the previous v4 but dropping
> support for I2C since the ssd133x family does not support that interface.
>
> The patches were tested on a Waveshare SSD1331 display using glmark2-drm,
> fbcon, fbtests and the retroarch emulator. The binding schema were tested
> using the `make W=1 dt_binding_check` target.
>
> Patch #1 and #2 are fixes for the DT binding schema of the existing SSD130x
> and SSD132x families.
>
> Patch #3 adds a DT binding schema for the SSD133x controllers and patch #4
> extends the ssd130x DRM driver to support the SSD133x controller family.
>
> Best regards,
> Javier

Pushed to drm-misc (drm-misc-next). Thanks!

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat