diff mbox series

[v4,05/14] video: mediatek: add padding component

Message ID 20260902-add-genio-510-and-genio-700-hdmi-v4-5-7c3b4f068a56@baylibre.com
State Superseded
Delegated to: David Lechner
Headers show
Series mediatek: add HDMI pipeline support for MT8188 based boards | expand

Commit Message

Julien Stephan Sept. 2, 2026, 2:15 p.m. UTC 
The padding block is one of the components of the video pipeline on
some MediaTek SoCs, such as the MT8188. It is configured in bypass
mode.

Signed-off-by: Julien Stephan <jstephan@baylibre.com>
---
 drivers/video/mediatek/mtk_disp_padding.c | 40 +++++++++++++++++++++++++++++++
 drivers/video/mediatek/mtk_disp_padding.h | 16 +++++++++++++
 2 files changed, 56 insertions(+)
diff mbox series

Patch

diff --git a/drivers/video/mediatek/mtk_disp_padding.c b/drivers/video/mediatek/mtk_disp_padding.c
new file mode 100644
index 00000000000..4a69670bff2
--- /dev/null
+++ b/drivers/video/mediatek/mtk_disp_padding.c
@@ -0,0 +1,40 @@ 
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Mediatek Video Disp Padding Support
+ *
+ * Copyright (c) 2026 BayLibre, SAS.
+ * Author: Julien Stephan <jstephan@baylibre.com>
+ */
+
+#include <dm.h>
+
+#include "mtk_disp_comp.h"
+#include "mtk_disp_padding.h"
+
+#define PADDING_CONTROL_REG	0x00
+#define PADDING_BYPASS			BIT(0)
+#define PADDING_ENABLE			BIT(1)
+#define PADDING_PIC_SIZE_REG	0x04
+#define PADDING_H_REG		0x08 /* horizontal */
+#define PADDING_V_REG		0x0c /* vertical */
+#define PADDING_COLOR_REG	0x10
+
+void mtk_disp_padding_config(struct udevice *dev)
+{
+	mtk_disp_comp_write(dev, PADDING_CONTROL_REG,
+			    PADDING_ENABLE | PADDING_BYPASS);
+	mtk_disp_comp_write(dev, PADDING_PIC_SIZE_REG, 0x0);
+}
+
+static const struct udevice_id mtk_disp_padding_ids[] = {
+	{ .compatible = "mediatek,mt8188-disp-padding" },
+	{}
+};
+
+U_BOOT_DRIVER(mtk_disp_padding) = {
+	.name	   = "mtk_disp_padding",
+	.id	   = UCLASS_MISC,
+	.of_match  = mtk_disp_padding_ids,
+	.probe	   = mtk_disp_comp_probe,
+	.priv_auto = sizeof(struct mtk_disp_comp_priv),
+};
diff --git a/drivers/video/mediatek/mtk_disp_padding.h b/drivers/video/mediatek/mtk_disp_padding.h
new file mode 100644
index 00000000000..f3cdd363b12
--- /dev/null
+++ b/drivers/video/mediatek/mtk_disp_padding.h
@@ -0,0 +1,16 @@ 
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Mediatek Video Disp Padding Support
+ *
+ * Copyright (c) 2026 BayLibre, SAS.
+ * Author: Julien Stephan <jstephan@baylibre.com>
+ */
+
+#ifndef _MTK_DISP_PADDING_H
+#define _MTK_DISP_PADDING_H
+
+struct udevice;
+
+void mtk_disp_padding_config(struct udevice *dev);
+
+#endif