drm/panel: s6e63m0: Add DSI transport (435e06c0) · Commits · EulixOS / Software / Kernel

drivers/gpu/drm/panel/Kconfig

+8 −0

Original line number	Diff line number	Diff line
		@@ -341,6 +341,14 @@ config DRM_PANEL_SAMSUNG_S6E63M0_SPI
		Say Y here if you want to be able to access the Samsung
		S6E63M0 panel using SPI.

		config DRM_PANEL_SAMSUNG_S6E63M0_DSI
		tristate "Samsung S6E63M0 RGB DSI interface"
		depends on DRM_MIPI_DSI
		depends on DRM_PANEL_SAMSUNG_S6E63M0
		help
		Say Y here if you want to be able to access the Samsung
		S6E63M0 panel using DSI.

		config DRM_PANEL_SAMSUNG_S6E88A0_AMS452EF01
		tristate "Samsung AMS452EF01 panel with S6E88A0 DSI video mode controller"
		depends on OF

drivers/gpu/drm/panel/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -35,6 +35,7 @@ obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E3HA2) += panel-samsung-s6e3ha2.o
		obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63J0X03) += panel-samsung-s6e63j0x03.o
		obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63M0) += panel-samsung-s6e63m0.o
		obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63M0_SPI) += panel-samsung-s6e63m0-spi.o
		obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E63M0_DSI) += panel-samsung-s6e63m0-dsi.o
		obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E88A0_AMS452EF01) += panel-samsung-s6e88a0-ams452ef01.o
		obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E8AA0) += panel-samsung-s6e8aa0.o
		obj-$(CONFIG_DRM_PANEL_SEIKO_43WVF1G) += panel-seiko-43wvf1g.o

drivers/gpu/drm/panel/panel-samsung-s6e63m0-dsi.c

0 → 100644

+128 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0
		/*
		* DSI interface to the Samsung S6E63M0 panel.
		* (C) 2019 Linus Walleij
		*/

		#include <linux/module.h>
		#include <linux/delay.h>
		#include <linux/of_device.h>

		#include <drm/drm_mipi_dsi.h>
		#include <drm/drm_print.h>

		#include "panel-samsung-s6e63m0.h"

		#define MCS_GLOBAL_PARAM 0xb0
		#define S6E63M0_DSI_MAX_CHUNK 15 /* CMD + 15 bytes max */

		static int s6e63m0_dsi_dcs_write(struct device dev, const u8 data, size_t len)
		{
		struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);
		const u8 *seqp = data;
		u8 cmd;
		u8 cmdwritten;
		int remain;
		int chunk;
		int ret;

		DRM_DEV_INFO(dev, "DSI writing dcs seq: %*ph\n", (int)len, data);

		/* Pick out and skip past the DCS command */
		cmd = *seqp;
		seqp++;
		cmdwritten = 0;
		remain = len - 1;
		chunk = remain;

		/* Send max S6E63M0_DSI_MAX_CHUNK bytes at a time */
		if (chunk > S6E63M0_DSI_MAX_CHUNK)
		chunk = S6E63M0_DSI_MAX_CHUNK;
		ret = mipi_dsi_dcs_write(dsi, cmd, seqp, chunk);
		if (ret < 0) {
		DRM_DEV_ERROR(dev,
		"error sending DCS command seq cmd %02x\n",
		cmd);
		return ret;
		}
		cmdwritten += chunk;
		seqp += chunk;

		while (cmdwritten < remain) {
		chunk = remain - cmdwritten;
		if (chunk > S6E63M0_DSI_MAX_CHUNK)
		chunk = S6E63M0_DSI_MAX_CHUNK;
		ret = mipi_dsi_dcs_write(dsi, MCS_GLOBAL_PARAM, &cmdwritten, 1);
		if (ret < 0) {
		DRM_DEV_ERROR(dev,
		"error sending CMD %02x global param %02x\n",
		cmd, cmdwritten);
		return ret;
		}
		ret = mipi_dsi_dcs_write(dsi, cmd, seqp, chunk);
		if (ret < 0) {
		DRM_DEV_ERROR(dev,
		"error sending CMD %02x chunk\n",
		cmd);
		return ret;
		}
		cmdwritten += chunk;
		seqp += chunk;
		}
		DRM_DEV_INFO(dev, "sent command %02x %02x bytes\n",
		cmd, cmdwritten);

		usleep_range(8000, 9000);

		return 0;
		}

		static int s6e63m0_dsi_probe(struct mipi_dsi_device *dsi)
		{
		struct device *dev = &dsi->dev;
		int ret;

		dsi->lanes = 2;
		dsi->format = MIPI_DSI_FMT_RGB888;
		dsi->hs_rate = 349440000;
		dsi->lp_rate = 9600000;
		dsi->mode_flags = MIPI_DSI_MODE_VIDEO \|
		MIPI_DSI_MODE_EOT_PACKET \|
		MIPI_DSI_MODE_VIDEO_BURST;

		ret = s6e63m0_probe(dev, s6e63m0_dsi_dcs_write, true);
		if (ret)
		return ret;

		ret = mipi_dsi_attach(dsi);
		if (ret < 0)
		s6e63m0_remove(dev);

		return ret;
		}

		static int s6e63m0_dsi_remove(struct mipi_dsi_device *dsi)
		{
		mipi_dsi_detach(dsi);
		return s6e63m0_remove(&dsi->dev);
		}

		static const struct of_device_id s6e63m0_dsi_of_match[] = {
		{ .compatible = "samsung,s6e63m0" },
		{ /* sentinel */ }
		};
		MODULE_DEVICE_TABLE(of, s6e63m0_dsi_of_match);

		static struct mipi_dsi_driver s6e63m0_dsi_driver = {
		.probe = s6e63m0_dsi_probe,
		.remove = s6e63m0_dsi_remove,
		.driver = {
		.name = "panel-samsung-s6e63m0",
		.of_match_table = s6e63m0_dsi_of_match,
		},
		};
		module_mipi_dsi_driver(s6e63m0_dsi_driver);

		MODULE_AUTHOR("Linus Walleij <linusw@kernel.org>");
		MODULE_DESCRIPTION("s6e63m0 LCD DSI Driver");
		MODULE_LICENSE("GPL v2");

drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -60,7 +60,7 @@ static int s6e63m0_spi_probe(struct spi_device *spi)
		DRM_DEV_ERROR(dev, "spi setup failed.\n");
		return ret;
		}
		return s6e63m0_probe(dev, s6e63m0_spi_dcs_write);
		return s6e63m0_probe(dev, s6e63m0_spi_dcs_write, false);
		}

		static int s6e63m0_spi_remove(struct spi_device *spi)

drivers/gpu/drm/panel/panel-samsung-s6e63m0.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -400,7 +400,8 @@ static int s6e63m0_backlight_register(struct s6e63m0 *ctx)
		}

		int s6e63m0_probe(struct device *dev,
		int (dcs_write)(struct device dev, const u8 *data, size_t len))
		int (dcs_write)(struct device dev, const u8 *data, size_t len),
		bool dsi_mode)
		{
		struct s6e63m0 *ctx;
		int ret;
		@@ -432,6 +433,7 @@ int s6e63m0_probe(struct device *dev,
		}

		drm_panel_init(&ctx->panel, dev, &s6e63m0_drm_funcs,
		dsi_mode ? DRM_MODE_CONNECTOR_DSI :
		DRM_MODE_CONNECTOR_DPI);

		ret = s6e63m0_backlight_register(ctx);