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drm/panel: s6e63m0: Add DSI transport

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This makes it possible to use the s6e63m0 panel with a
DSI host, such as in the Samsung GT-I8190 (Golden) mobile
phone.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Stephan Gerhold <stephan@gerhold.net>
Cc: Stephan Gerhold <stephan@gerhold.net>
Cc: Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com>
Acked-by: Paul Cercueil <paul@crapouillou.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20200809215104.1830206-3-linus.walleij@linaro.org
This commit is contained in:
Linus Walleij 2020-08-09 23:51:02 +02:00
parent b7b23e4476
commit 435e06c06c
6 changed files with 144 additions and 3 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

8
drivers/gpu/drm/panel/Kconfig
View file

@ -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

1
drivers/gpu/drm/panel/Makefile
View file

@ -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

128
drivers/gpu/drm/panel/panel-samsung-s6e63m0-dsi.c Normal file
View file

@ -0,0 +1,128 @@
// 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");

2
drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c
View file

@ -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)

4
drivers/gpu/drm/panel/panel-samsung-s6e63m0.c
View file

@ -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);

4
drivers/gpu/drm/panel/panel-samsung-s6e63m0.h
View file

@ -4,7 +4,9 @@
#define _PANEL_SAMSUNG_S6E63M0_H
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);
int s6e63m0_remove(struct device *dev);
#endif /* _PANEL_SAMSUNG_S6E63M0_H */