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linux/drivers/gpu/drm/panel/panel-sony-tulip-truly-nt35521.c
Douglas Anderson f8c37b8809 drm/panel: Don't store+check prepared/enabled for simple cases 
As talked about in commit d2aacaf07395 ("drm/panel: Check for already
prepared/enabled in drm_panel"), we want to remove needless code from
panel drivers that was storing and double-checking the
prepared/enabled state. Even if someone was relying on the
double-check before, that double-check is now in the core and not
needed in individual drivers.

This pile of panel drivers appears to be simple to handle. Based on
code inspection they seemed to be using the prepared/enabled state
simply for double-checking that nothing else in the kernel called them
inconsistently. Now that the core drm_panel is doing the double
checking (and warning) it should be very clear that these devices
don't need their own double-check.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230804140605.RFC.1.Ia54954fd2f7645c1b86597494902973f57feeb71@changeid
2023-09-13 08:36:18 -07:00

525 lines
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2021, Linaro Limited
*
* Generated with linux-mdss-dsi-panel-driver-generator from vendor device tree:
* Copyright (c) 2013, The Linux Foundation. All rights reserved.
*/
#include <linux/backlight.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regulator/consumer.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
struct truly_nt35521 {
struct drm_panel panel;
struct mipi_dsi_device *dsi;
struct regulator_bulk_data supplies[2];
struct gpio_desc *reset_gpio;
struct gpio_desc *blen_gpio;
};
static inline
struct truly_nt35521 *to_truly_nt35521(struct drm_panel *panel)
{
return container_of(panel, struct truly_nt35521, panel);
}
static void truly_nt35521_reset(struct truly_nt35521 *ctx)
{
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
usleep_range(1000, 2000);
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
usleep_range(10000, 11000);
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
msleep(150);
}
static int truly_nt35521_on(struct truly_nt35521 *ctx)
{
struct mipi_dsi_device *dsi = ctx->dsi;
struct device *dev = &dsi->dev;
int ret;
dsi->mode_flags |= MIPI_DSI_MODE_LPM;
mipi_dsi_generic_write_seq(dsi, 0xf0, 0x55, 0xaa, 0x52, 0x08, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xff, 0xaa, 0x55, 0xa5, 0x80);
mipi_dsi_generic_write_seq(dsi, 0x6f, 0x11, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xf7, 0x20, 0x00);
mipi_dsi_generic_write_seq(dsi, 0x6f, 0x01);
mipi_dsi_generic_write_seq(dsi, 0xb1, 0x21);
mipi_dsi_generic_write_seq(dsi, 0xbd, 0x01, 0xa0, 0x10, 0x08, 0x01);
mipi_dsi_generic_write_seq(dsi, 0xb8, 0x01, 0x02, 0x0c, 0x02);
mipi_dsi_generic_write_seq(dsi, 0xbb, 0x11, 0x11);
mipi_dsi_generic_write_seq(dsi, 0xbc, 0x00, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xb6, 0x02);
mipi_dsi_generic_write_seq(dsi, 0xf0, 0x55, 0xaa, 0x52, 0x08, 0x01);
mipi_dsi_generic_write_seq(dsi, 0xb0, 0x09, 0x09);
mipi_dsi_generic_write_seq(dsi, 0xb1, 0x09, 0x09);
mipi_dsi_generic_write_seq(dsi, 0xbc, 0x8c, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xbd, 0x8c, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xca, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xc0, 0x04);
mipi_dsi_generic_write_seq(dsi, 0xbe, 0xb5);
mipi_dsi_generic_write_seq(dsi, 0xb3, 0x35, 0x35);
mipi_dsi_generic_write_seq(dsi, 0xb4, 0x25, 0x25);
mipi_dsi_generic_write_seq(dsi, 0xb9, 0x43, 0x43);
mipi_dsi_generic_write_seq(dsi, 0xba, 0x24, 0x24);
mipi_dsi_generic_write_seq(dsi, 0xf0, 0x55, 0xaa, 0x52, 0x08, 0x02);
mipi_dsi_generic_write_seq(dsi, 0xee, 0x03);
mipi_dsi_generic_write_seq(dsi, 0xb0,
0x00, 0xb2, 0x00, 0xb3, 0x00, 0xb6, 0x00, 0xc3,
0x00, 0xce, 0x00, 0xe1, 0x00, 0xf3, 0x01, 0x11);
mipi_dsi_generic_write_seq(dsi, 0xb1,
0x01, 0x2e, 0x01, 0x5c, 0x01, 0x82, 0x01, 0xc3,
0x01, 0xfe, 0x02, 0x00, 0x02, 0x37, 0x02, 0x77);
mipi_dsi_generic_write_seq(dsi, 0xb2,
0x02, 0xa1, 0x02, 0xd7, 0x02, 0xfe, 0x03, 0x2c,
0x03, 0x4b, 0x03, 0x63, 0x03, 0x8f, 0x03, 0x90);
mipi_dsi_generic_write_seq(dsi, 0xb3, 0x03, 0x96, 0x03, 0x98);
mipi_dsi_generic_write_seq(dsi, 0xb4,
0x00, 0x81, 0x00, 0x8b, 0x00, 0x9c, 0x00, 0xa9,
0x00, 0xb5, 0x00, 0xcb, 0x00, 0xdf, 0x01, 0x02);
mipi_dsi_generic_write_seq(dsi, 0xb5,
0x01, 0x1f, 0x01, 0x51, 0x01, 0x7a, 0x01, 0xbf,
0x01, 0xfa, 0x01, 0xfc, 0x02, 0x34, 0x02, 0x76);
mipi_dsi_generic_write_seq(dsi, 0xb6,
0x02, 0x9f, 0x02, 0xd7, 0x02, 0xfc, 0x03, 0x2c,
0x03, 0x4a, 0x03, 0x63, 0x03, 0x8f, 0x03, 0xa2);
mipi_dsi_generic_write_seq(dsi, 0xb7, 0x03, 0xb8, 0x03, 0xba);
mipi_dsi_generic_write_seq(dsi, 0xb8,
0x00, 0x01, 0x00, 0x02, 0x00, 0x0e, 0x00, 0x2a,
0x00, 0x41, 0x00, 0x67, 0x00, 0x87, 0x00, 0xb9);
mipi_dsi_generic_write_seq(dsi, 0xb9,
0x00, 0xe2, 0x01, 0x22, 0x01, 0x54, 0x01, 0xa3,
0x01, 0xe6, 0x01, 0xe7, 0x02, 0x24, 0x02, 0x67);
mipi_dsi_generic_write_seq(dsi, 0xba,
0x02, 0x93, 0x02, 0xcd, 0x02, 0xf6, 0x03, 0x31,
0x03, 0x6c, 0x03, 0xe9, 0x03, 0xef, 0x03, 0xf4);
mipi_dsi_generic_write_seq(dsi, 0xbb, 0x03, 0xf6, 0x03, 0xf7);
mipi_dsi_generic_write_seq(dsi, 0xf0, 0x55, 0xaa, 0x52, 0x08, 0x03);
mipi_dsi_generic_write_seq(dsi, 0xb0, 0x22, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xb1, 0x22, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xb2, 0x05, 0x00, 0x60, 0x00, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xb3, 0x05, 0x00, 0x60, 0x00, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xb4, 0x05, 0x00, 0x60, 0x00, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xb5, 0x05, 0x00, 0x60, 0x00, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xba, 0x53, 0x00, 0x60, 0x00, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xbb, 0x53, 0x00, 0x60, 0x00, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xbc, 0x53, 0x00, 0x60, 0x00, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xbd, 0x53, 0x00, 0x60, 0x00, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xc0, 0x00, 0x34, 0x00, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xc1, 0x00, 0x00, 0x34, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xc2, 0x00, 0x00, 0x34, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xc3, 0x00, 0x00, 0x34, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xc4, 0x60);
mipi_dsi_generic_write_seq(dsi, 0xc5, 0xc0);
mipi_dsi_generic_write_seq(dsi, 0xc6, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xc7, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xf0, 0x55, 0xaa, 0x52, 0x08, 0x05);
mipi_dsi_generic_write_seq(dsi, 0xb0, 0x17, 0x06);
mipi_dsi_generic_write_seq(dsi, 0xb1, 0x17, 0x06);
mipi_dsi_generic_write_seq(dsi, 0xb2, 0x17, 0x06);
mipi_dsi_generic_write_seq(dsi, 0xb3, 0x17, 0x06);
mipi_dsi_generic_write_seq(dsi, 0xb4, 0x17, 0x06);
mipi_dsi_generic_write_seq(dsi, 0xb5, 0x17, 0x06);
mipi_dsi_generic_write_seq(dsi, 0xb6, 0x17, 0x06);
mipi_dsi_generic_write_seq(dsi, 0xb7, 0x17, 0x06);
mipi_dsi_generic_write_seq(dsi, 0xb8, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xb9, 0x00, 0x03);
mipi_dsi_generic_write_seq(dsi, 0xba, 0x00, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xbb, 0x02, 0x03);
mipi_dsi_generic_write_seq(dsi, 0xbc, 0x02, 0x03);
mipi_dsi_generic_write_seq(dsi, 0xbd, 0x03, 0x03, 0x00, 0x03, 0x03);
mipi_dsi_generic_write_seq(dsi, 0xc0, 0x0b);
mipi_dsi_generic_write_seq(dsi, 0xc1, 0x09);
mipi_dsi_generic_write_seq(dsi, 0xc2, 0xa6);
mipi_dsi_generic_write_seq(dsi, 0xc3, 0x05);
mipi_dsi_generic_write_seq(dsi, 0xc4, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xc5, 0x02);
mipi_dsi_generic_write_seq(dsi, 0xc6, 0x22);
mipi_dsi_generic_write_seq(dsi, 0xc7, 0x03);
mipi_dsi_generic_write_seq(dsi, 0xc8, 0x07, 0x20);
mipi_dsi_generic_write_seq(dsi, 0xc9, 0x03, 0x20);
mipi_dsi_generic_write_seq(dsi, 0xca, 0x01, 0x60);
mipi_dsi_generic_write_seq(dsi, 0xcb, 0x01, 0x60);
mipi_dsi_generic_write_seq(dsi, 0xcc, 0x00, 0x00, 0x02);
mipi_dsi_generic_write_seq(dsi, 0xcd, 0x00, 0x00, 0x02);
mipi_dsi_generic_write_seq(dsi, 0xce, 0x00, 0x00, 0x02);
mipi_dsi_generic_write_seq(dsi, 0xcf, 0x00, 0x00, 0x02);
mipi_dsi_generic_write_seq(dsi, 0xd1, 0x00, 0x05, 0x01, 0x07, 0x10);
mipi_dsi_generic_write_seq(dsi, 0xd2, 0x10, 0x05, 0x05, 0x03, 0x10);
mipi_dsi_generic_write_seq(dsi, 0xd3, 0x20, 0x00, 0x43, 0x07, 0x10);
mipi_dsi_generic_write_seq(dsi, 0xd4, 0x30, 0x00, 0x43, 0x07, 0x10);
mipi_dsi_generic_write_seq(dsi, 0xd0,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xd5,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xd6,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xd7,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xe5, 0x06);
mipi_dsi_generic_write_seq(dsi, 0xe6, 0x06);
mipi_dsi_generic_write_seq(dsi, 0xe7, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xe8, 0x06);
mipi_dsi_generic_write_seq(dsi, 0xe9, 0x06);
mipi_dsi_generic_write_seq(dsi, 0xea, 0x06);
mipi_dsi_generic_write_seq(dsi, 0xeb, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xec, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xed, 0x30);
mipi_dsi_generic_write_seq(dsi, 0xf0, 0x55, 0xaa, 0x52, 0x08, 0x06);
mipi_dsi_generic_write_seq(dsi, 0xb0, 0x31, 0x31);
mipi_dsi_generic_write_seq(dsi, 0xb1, 0x31, 0x31);
mipi_dsi_generic_write_seq(dsi, 0xb2, 0x2d, 0x2e);
mipi_dsi_generic_write_seq(dsi, 0xb3, 0x31, 0x34);
mipi_dsi_generic_write_seq(dsi, 0xb4, 0x29, 0x2a);
mipi_dsi_generic_write_seq(dsi, 0xb5, 0x12, 0x10);
mipi_dsi_generic_write_seq(dsi, 0xb6, 0x18, 0x16);
mipi_dsi_generic_write_seq(dsi, 0xb7, 0x00, 0x02);
mipi_dsi_generic_write_seq(dsi, 0xb8, 0x08, 0x31);
mipi_dsi_generic_write_seq(dsi, 0xb9, 0x31, 0x31);
mipi_dsi_generic_write_seq(dsi, 0xba, 0x31, 0x31);
mipi_dsi_generic_write_seq(dsi, 0xbb, 0x31, 0x08);
mipi_dsi_generic_write_seq(dsi, 0xbc, 0x03, 0x01);
mipi_dsi_generic_write_seq(dsi, 0xbd, 0x17, 0x19);
mipi_dsi_generic_write_seq(dsi, 0xbe, 0x11, 0x13);
mipi_dsi_generic_write_seq(dsi, 0xbf, 0x2a, 0x29);
mipi_dsi_generic_write_seq(dsi, 0xc0, 0x34, 0x31);
mipi_dsi_generic_write_seq(dsi, 0xc1, 0x2e, 0x2d);
mipi_dsi_generic_write_seq(dsi, 0xc2, 0x31, 0x31);
mipi_dsi_generic_write_seq(dsi, 0xc3, 0x31, 0x31);
mipi_dsi_generic_write_seq(dsi, 0xc4, 0x31, 0x31);
mipi_dsi_generic_write_seq(dsi, 0xc5, 0x31, 0x31);
mipi_dsi_generic_write_seq(dsi, 0xc6, 0x2e, 0x2d);
mipi_dsi_generic_write_seq(dsi, 0xc7, 0x31, 0x34);
mipi_dsi_generic_write_seq(dsi, 0xc8, 0x29, 0x2a);
mipi_dsi_generic_write_seq(dsi, 0xc9, 0x17, 0x19);
mipi_dsi_generic_write_seq(dsi, 0xca, 0x11, 0x13);
mipi_dsi_generic_write_seq(dsi, 0xcb, 0x03, 0x01);
mipi_dsi_generic_write_seq(dsi, 0xcc, 0x08, 0x31);
mipi_dsi_generic_write_seq(dsi, 0xcd, 0x31, 0x31);
mipi_dsi_generic_write_seq(dsi, 0xce, 0x31, 0x31);
mipi_dsi_generic_write_seq(dsi, 0xcf, 0x31, 0x08);
mipi_dsi_generic_write_seq(dsi, 0xd0, 0x00, 0x02);
mipi_dsi_generic_write_seq(dsi, 0xd1, 0x12, 0x10);
mipi_dsi_generic_write_seq(dsi, 0xd2, 0x18, 0x16);
mipi_dsi_generic_write_seq(dsi, 0xd3, 0x2a, 0x29);
mipi_dsi_generic_write_seq(dsi, 0xd4, 0x34, 0x31);
mipi_dsi_generic_write_seq(dsi, 0xd5, 0x2d, 0x2e);
mipi_dsi_generic_write_seq(dsi, 0xd6, 0x31, 0x31);
mipi_dsi_generic_write_seq(dsi, 0xd7, 0x31, 0x31);
mipi_dsi_generic_write_seq(dsi, 0xe5, 0x31, 0x31);
mipi_dsi_generic_write_seq(dsi, 0xe6, 0x31, 0x31);
mipi_dsi_generic_write_seq(dsi, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xd9, 0x00, 0x00, 0x00, 0x00, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xe7, 0x00);
mipi_dsi_generic_write_seq(dsi, 0x6f, 0x02);
mipi_dsi_generic_write_seq(dsi, 0xf7, 0x47);
mipi_dsi_generic_write_seq(dsi, 0x6f, 0x0a);
mipi_dsi_generic_write_seq(dsi, 0xf7, 0x02);
mipi_dsi_generic_write_seq(dsi, 0x6f, 0x17);
mipi_dsi_generic_write_seq(dsi, 0xf4, 0x60);
mipi_dsi_generic_write_seq(dsi, 0x6f, 0x01);
mipi_dsi_generic_write_seq(dsi, 0xf9, 0x46);
mipi_dsi_generic_write_seq(dsi, 0x6f, 0x11);
mipi_dsi_generic_write_seq(dsi, 0xf3, 0x01);
mipi_dsi_generic_write_seq(dsi, 0x35, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xf0, 0x55, 0xaa, 0x52, 0x08, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xd9, 0x02, 0x03, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xf0, 0x55, 0xaa, 0x52, 0x00, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xf0, 0x55, 0xaa, 0x52, 0x08, 0x00);
mipi_dsi_generic_write_seq(dsi, 0xb1, 0x6c, 0x21);
mipi_dsi_generic_write_seq(dsi, 0xf0, 0x55, 0xaa, 0x52, 0x00, 0x00);
mipi_dsi_generic_write_seq(dsi, 0x35, 0x00);
ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
if (ret < 0) {
dev_err(dev, "Failed to exit sleep mode: %d\n", ret);
return ret;
}
msleep(120);
ret = mipi_dsi_dcs_set_display_on(dsi);
if (ret < 0) {
dev_err(dev, "Failed to set display on: %d\n", ret);
return ret;
}
usleep_range(1000, 2000);
mipi_dsi_generic_write_seq(dsi, 0x53, 0x24);
return 0;
}
static int truly_nt35521_off(struct truly_nt35521 *ctx)
{
struct mipi_dsi_device *dsi = ctx->dsi;
struct device *dev = &dsi->dev;
int ret;
dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
ret = mipi_dsi_dcs_set_display_off(dsi);
if (ret < 0) {
dev_err(dev, "Failed to set display off: %d\n", ret);
return ret;
}
msleep(50);
ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
if (ret < 0) {
dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
return ret;
}
msleep(150);
return 0;
}
static int truly_nt35521_prepare(struct drm_panel *panel)
{
struct truly_nt35521 *ctx = to_truly_nt35521(panel);
struct device *dev = &ctx->dsi->dev;
int ret;
ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
if (ret < 0) {
dev_err(dev, "Failed to enable regulators: %d\n", ret);
return ret;
}
truly_nt35521_reset(ctx);
ret = truly_nt35521_on(ctx);
if (ret < 0) {
dev_err(dev, "Failed to initialize panel: %d\n", ret);
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
return ret;
}
return 0;
}
static int truly_nt35521_unprepare(struct drm_panel *panel)
{
struct truly_nt35521 *ctx = to_truly_nt35521(panel);
struct device *dev = &ctx->dsi->dev;
int ret;
ret = truly_nt35521_off(ctx);
if (ret < 0)
dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
regulator_bulk_disable(ARRAY_SIZE(ctx->supplies),
ctx->supplies);
return 0;
}
static int truly_nt35521_enable(struct drm_panel *panel)
{
struct truly_nt35521 *ctx = to_truly_nt35521(panel);
gpiod_set_value_cansleep(ctx->blen_gpio, 1);
return 0;
}
static int truly_nt35521_disable(struct drm_panel *panel)
{
struct truly_nt35521 *ctx = to_truly_nt35521(panel);
gpiod_set_value_cansleep(ctx->blen_gpio, 0);
return 0;
}
static const struct drm_display_mode truly_nt35521_mode = {
.clock = (720 + 232 + 20 + 112) * (1280 + 18 + 1 + 18) * 60 / 1000,
.hdisplay = 720,
.hsync_start = 720 + 232,
.hsync_end = 720 + 232 + 20,
.htotal = 720 + 232 + 20 + 112,
.vdisplay = 1280,
.vsync_start = 1280 + 18,
.vsync_end = 1280 + 18 + 1,
.vtotal = 1280 + 18 + 1 + 18,
.width_mm = 65,
.height_mm = 116,
};
static int truly_nt35521_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
struct drm_display_mode *mode;
mode = drm_mode_duplicate(connector->dev, &truly_nt35521_mode);
if (!mode)
return -ENOMEM;
drm_mode_set_name(mode);
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
connector->display_info.width_mm = mode->width_mm;
connector->display_info.height_mm = mode->height_mm;
drm_mode_probed_add(connector, mode);
return 1;
}
static const struct drm_panel_funcs truly_nt35521_panel_funcs = {
.prepare = truly_nt35521_prepare,
.unprepare = truly_nt35521_unprepare,
.enable = truly_nt35521_enable,
.disable = truly_nt35521_disable,
.get_modes = truly_nt35521_get_modes,
};
static int truly_nt35521_bl_update_status(struct backlight_device *bl)
{
struct mipi_dsi_device *dsi = bl_get_data(bl);
u16 brightness = backlight_get_brightness(bl);
int ret;
ret = mipi_dsi_dcs_set_display_brightness(dsi, brightness);
if (ret < 0)
return ret;
return 0;
}
static int truly_nt35521_bl_get_brightness(struct backlight_device *bl)
{
struct mipi_dsi_device *dsi = bl_get_data(bl);
u16 brightness;
int ret;
ret = mipi_dsi_dcs_get_display_brightness(dsi, &brightness);
if (ret < 0)
return ret;
return brightness & 0xff;
}
static const struct backlight_ops truly_nt35521_bl_ops = {
.update_status = truly_nt35521_bl_update_status,
.get_brightness = truly_nt35521_bl_get_brightness,
};
static struct backlight_device *
truly_nt35521_create_backlight(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
const struct backlight_properties props = {
.type = BACKLIGHT_RAW,
.brightness = 255,
.max_brightness = 255,
};
return devm_backlight_device_register(dev, dev_name(dev), dev, dsi,
&truly_nt35521_bl_ops, &props);
}
static int truly_nt35521_probe(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct truly_nt35521 *ctx;
int ret;
ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->supplies[0].supply = "positive5";
ctx->supplies[1].supply = "negative5";
ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
ctx->supplies);
if (ret < 0) {
dev_err(dev, "Failed to get regulators: %d\n", ret);
return ret;
}
ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(ctx->reset_gpio))
return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
"Failed to get reset-gpios\n");
ctx->blen_gpio = devm_gpiod_get(dev, "backlight", GPIOD_OUT_LOW);
if (IS_ERR(ctx->blen_gpio))
return dev_err_probe(dev, PTR_ERR(ctx->blen_gpio),
"Failed to get backlight-gpios\n");
ctx->dsi = dsi;
mipi_dsi_set_drvdata(dsi, ctx);
dsi->lanes = 4;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
MIPI_DSI_MODE_VIDEO_HSE | MIPI_DSI_MODE_NO_EOT_PACKET |
MIPI_DSI_CLOCK_NON_CONTINUOUS;
drm_panel_init(&ctx->panel, dev, &truly_nt35521_panel_funcs,
DRM_MODE_CONNECTOR_DSI);
ctx->panel.backlight = truly_nt35521_create_backlight(dsi);
if (IS_ERR(ctx->panel.backlight))
return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),
"Failed to create backlight\n");
drm_panel_add(&ctx->panel);
ret = mipi_dsi_attach(dsi);
if (ret < 0) {
dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
drm_panel_remove(&ctx->panel);
return ret;
}
return 0;
}
static void truly_nt35521_remove(struct mipi_dsi_device *dsi)
{
struct truly_nt35521 *ctx = mipi_dsi_get_drvdata(dsi);
int ret;
ret = mipi_dsi_detach(dsi);
if (ret < 0)
dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
drm_panel_remove(&ctx->panel);
}
static const struct of_device_id truly_nt35521_of_match[] = {
{ .compatible = "sony,tulip-truly-nt35521" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, truly_nt35521_of_match);
static struct mipi_dsi_driver truly_nt35521_driver = {
.probe = truly_nt35521_probe,
.remove = truly_nt35521_remove,
.driver = {
.name = "panel-truly-nt35521",
.of_match_table = truly_nt35521_of_match,
},
};
module_mipi_dsi_driver(truly_nt35521_driver);
MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
MODULE_DESCRIPTION("DRM driver for Sony Tulip Truly NT35521 panel");
MODULE_LICENSE("GPL v2");
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