linux-stable/drivers/gpu/drm/panel/panel-samsung-s6e63m0-dsi.c
Rob Herring 722d4f06e5 drm: Explicitly include correct DT includes
The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.

Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Steven Price <steven.price@arm.com>
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Acked-by: Robert Foss <rfoss@kernel.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230714174545.4056287-1-robh@kernel.org
2023-07-21 09:12:43 +02:00

140 lines
3.2 KiB
C

// 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/mod_devicetable.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_read(struct device *dev, void *trsp,
const u8 cmd, u8 *data)
{
struct mipi_dsi_device *dsi = to_mipi_dsi_device(dev);
int ret;
ret = mipi_dsi_dcs_read(dsi, cmd, data, 1);
if (ret < 0) {
dev_err(dev, "could not read DCS CMD %02x\n", cmd);
return ret;
}
dev_dbg(dev, "DSI read CMD %02x = %02x\n", cmd, *data);
return 0;
}
static int s6e63m0_dsi_dcs_write(struct device *dev, void *trsp,
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;
dev_dbg(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) {
dev_err(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) {
dev_err(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) {
dev_err(dev, "error sending CMD %02x chunk\n", cmd);
return ret;
}
cmdwritten += chunk;
seqp += chunk;
}
dev_dbg(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_VIDEO_BURST;
ret = s6e63m0_probe(dev, NULL, s6e63m0_dsi_dcs_read,
s6e63m0_dsi_dcs_write, true);
if (ret)
return ret;
ret = mipi_dsi_attach(dsi);
if (ret < 0)
s6e63m0_remove(dev);
return ret;
}
static void s6e63m0_dsi_remove(struct mipi_dsi_device *dsi)
{
mipi_dsi_detach(dsi);
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");