linux-kernel - [PATCH v6] drm/panel: Add support for E Ink VB3300-KCA

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Date:   Sun,  1 Aug 2021 10:47:00 +1000
From:   Alistair Francis <alistair@...stair23.me>
To:     robh+dt@...nel.org, thierry.reding@...il.com, sam@...nborg.org,
        krzk@...nel.org, shawnguo@...nel.org, daniel@...f.com,
        linux@...pel-privat.de, kuninori.morimoto.gx@...esas.com,
        max.Merchel@...group.com, geert+renesas@...der.be,
        airlied@...ux.ie, daniel@...ll.ch
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, alistair23@...il.com,
        Alistair Francis <alistair@...stair23.me>,
        Rob Herring <robh@...nel.org>
Subject: [PATCH v6] drm/panel: Add support for E Ink VB3300-KCA

Add support for the 10.3" E Ink panel described at:
https://www.eink.com/product.html?type=productdetail&id=7

Signed-off-by: Alistair Francis <alistair@...stair23.me>
Acked-by: Rob Herring <robh@...nel.org>
Reviewed-by: Sam Ravnborg <sam@...nborg.org>
---
v6:
 - Rebase on linux-next

 .../bindings/display/panel/panel-simple.yaml  |  2 ++
 .../devicetree/bindings/vendor-prefixes.yaml  |  2 ++
 drivers/gpu/drm/panel/panel-simple.c          | 30 +++++++++++++++++++
 3 files changed, 34 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/panel/panel-simple.yaml b/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
index 3624363938dd..1f6a04a91a37 100644
--- a/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
+++ b/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
@@ -134,6 +134,8 @@ properties:
         # Emerging Display Technology Corp. 5.7" VGA TFT LCD panel with
         # capacitive touch
       - edt,etmv570g2dhu
+        # E Ink VB3300-KCA
+      - eink,vb3300-kca
         # Evervision Electronics Co. Ltd. VGG804821 5.0" WVGA TFT LCD Panel
       - evervision,vgg804821
         # Foxlink Group 5" WVGA TFT LCD panel
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index 62cb1d9341f5..e2291aee435d 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -339,6 +339,8 @@ patternProperties:
     description: eGalax_eMPIA Technology Inc
   "^einfochips,.*":
     description: Einfochips
+  "^eink,.*":
+    description: E Ink Corporation
   "^elan,.*":
     description: Elan Microelectronic Corp.
   "^element14,.*":
diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 461794ae4188..3af7068838d3 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -2146,6 +2146,33 @@ static const struct panel_desc edt_etmv570g2dhu = {
 	.connector_type = DRM_MODE_CONNECTOR_DPI,
 };
 
+static const struct display_timing eink_vb3300_kca_timing = {
+	.pixelclock = { 40000000, 40000000, 40000000 },
+	.hactive = { 334, 334, 334 },
+	.hfront_porch = { 1, 1, 1 },
+	.hback_porch = { 1, 1, 1 },
+	.hsync_len = { 1, 1, 1 },
+	.vactive = { 1405, 1405, 1405 },
+	.vfront_porch = { 1, 1, 1 },
+	.vback_porch = { 1, 1, 1 },
+	.vsync_len = { 1, 1, 1 },
+	.flags = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW |
+		 DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_PIXDATA_POSEDGE,
+};
+
+static const struct panel_desc eink_vb3300_kca = {
+	.timings = &eink_vb3300_kca_timing,
+	.num_timings = 1,
+	.bpc = 6,
+	.size = {
+		.width = 157,
+		.height = 209,
+	},
+	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
+	.bus_flags = DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE,
+	.connector_type = DRM_MODE_CONNECTOR_DPI,
+};
+
 static const struct display_timing evervision_vgg804821_timing = {
 	.pixelclock = { 27600000, 33300000, 50000000 },
 	.hactive = { 800, 800, 800 },
@@ -4486,6 +4513,9 @@ static const struct of_device_id platform_of_match[] = {
 	}, {
 		.compatible = "edt,etmv570g2dhu",
 		.data = &edt_etmv570g2dhu,
+	}, {
+		.compatible = "eink,vb3300-kca",
+		.data = &eink_vb3300_kca,
 	}, {
 		.compatible = "evervision,vgg804821",
 		.data = &evervision_vgg804821,
-- 
2.31.1