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drm/panel: ltk500hd1829: make room for more similar panels 

There exist more dsi-panels from Leadtek sharing supplies and timings
with only the panel-mode and init commands differing.

So make room in the driver to also keep variants here instead of
requiring additional drivers per panel.

Signed-off-by: Heiko Stuebner <heiko.stuebner@cherry.de>
Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240215090515.3513817-2-heiko@sntech.de
This commit is contained in:
Heiko Stuebner 2024-02-15 10:05:13 +01:00 committed by Heiko Stuebner
parent c530379a68
commit f9488c160d
1 changed files with 47 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

73
drivers/gpu/drm/panel/panel-leadtek-ltk500hd1829.c
View File

@ -11,6 +11,7 @@
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/regulator/consumer.h>
#include <video/mipi_display.h>
@ -21,25 +22,32 @@
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
struct ltk500hd1829_cmd {
char cmd;
char data;
};
struct ltk500hd1829_desc {
const struct drm_display_mode *mode;
const struct ltk500hd1829_cmd *init;
unsigned int num_init;
};
struct ltk500hd1829 {
struct device *dev;
struct drm_panel panel;
struct gpio_desc *reset_gpio;
struct regulator *vcc;
struct regulator *iovcc;
const struct ltk500hd1829_desc *panel_desc;
bool prepared;
};
struct ltk500hd1829_cmd {
char cmd;
char data;
};
/*
* There is no description in the Reference Manual about these commands.
* We received them from the vendor, so just use them as is.
*/
static const struct ltk500hd1829_cmd init_code[] = {
static const struct ltk500hd1829_cmd ltk500hd1829_init[] = {
{ 0xE0, 0x00 },
{ 0xE1, 0x93 },
{ 0xE2, 0x65 },
@ -260,6 +268,26 @@ static const struct ltk500hd1829_cmd init_code[] = {
{ 0x35, 0x00 },
};
static const struct drm_display_mode ltk500hd1829_mode = {
.hdisplay = 720,
.hsync_start = 720 + 50,
.hsync_end = 720 + 50 + 50,
.htotal = 720 + 50 + 50 + 50,
.vdisplay = 1280,
.vsync_start = 1280 + 30,
.vsync_end = 1280 + 30 + 4,
.vtotal = 1280 + 30 + 4 + 12,
.clock = 69217,
.width_mm = 62,
.height_mm = 110,
};
static const struct ltk500hd1829_desc ltk500hd1829_data = {
.mode = &ltk500hd1829_mode,
.init = ltk500hd1829_init,
.num_init = ARRAY_SIZE(ltk500hd1829_init),
};
static inline
struct ltk500hd1829 *panel_to_ltk500hd1829(struct drm_panel *panel)
{
@ -324,8 +352,8 @@ static int ltk500hd1829_prepare(struct drm_panel *panel)
/* tRT: >= 5ms */
usleep_range(5000, 6000);
for (i = 0; i < ARRAY_SIZE(init_code); i++) {
ret = mipi_dsi_generic_write(dsi, &init_code[i],
for (i = 0; i < ctx->panel_desc->num_init; i++) {
ret = mipi_dsi_generic_write(dsi, &ctx->panel_desc->init[i],
sizeof(struct ltk500hd1829_cmd));
if (ret < 0) {
dev_err(panel->dev, "failed to write init cmds: %d\n", ret);
@ -359,31 +387,17 @@ disable_vcc:
return ret;
}
static const struct drm_display_mode default_mode = {
.hdisplay = 720,
.hsync_start = 720 + 50,
.hsync_end = 720 + 50 + 50,
.htotal = 720 + 50 + 50 + 50,
.vdisplay = 1280,
.vsync_start = 1280 + 30,
.vsync_end = 1280 + 30 + 4,
.vtotal = 1280 + 30 + 4 + 12,
.clock = 69217,
.width_mm = 62,
.height_mm = 110,
};
static int ltk500hd1829_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
struct ltk500hd1829 *ctx = panel_to_ltk500hd1829(panel);
struct drm_display_mode *mode;
mode = drm_mode_duplicate(connector->dev, &default_mode);
mode = drm_mode_duplicate(connector->dev, ctx->panel_desc->mode);
if (!mode) {
dev_err(ctx->dev, "failed to add mode %ux%u@%u\n",
default_mode.hdisplay, default_mode.vdisplay,
drm_mode_vrefresh(&default_mode));
ctx->panel_desc->mode->hdisplay, ctx->panel_desc->mode->vdisplay,
drm_mode_vrefresh(ctx->panel_desc->mode));
return -ENOMEM;
}
@ -413,6 +427,10 @@ static int ltk500hd1829_probe(struct mipi_dsi_device *dsi)
if (!ctx)
return -ENOMEM;
ctx->panel_desc = of_device_get_match_data(dev);
if (!ctx->panel_desc)
return -EINVAL;
ctx->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(ctx->reset_gpio)) {
dev_err(dev, "cannot get reset gpio\n");
@ -492,7 +510,10 @@ static void ltk500hd1829_remove(struct mipi_dsi_device *dsi)
}
static const struct of_device_id ltk500hd1829_of_match[] = {
{ .compatible = "leadtek,ltk500hd1829", },
{
.compatible = "leadtek,ltk500hd1829",
.data = &ltk500hd1829_data,
},
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, ltk500hd1829_of_match);