#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;
};
#define NT35521_DCS_SWITCH_PAGE 0xf0
#define nt35521_switch_page(dsi_ctx, page) \
mipi_dsi_dcs_write_seq_multi(dsi_ctx, NT35521_DCS_SWITCH_PAGE, \
0x55, 0xaa, 0x52, 0x08, (page))
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 mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
dsi->mode_flags |= MIPI_DSI_MODE_LPM;
nt35521_switch_page(&dsi_ctx, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xff, 0xaa, 0x55, 0xa5, 0x80);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x6f, 0x11, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf7, 0x20, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x6f, 0x01);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb1, 0x21);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbd, 0x01, 0xa0, 0x10, 0x08, 0x01);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb8, 0x01, 0x02, 0x0c, 0x02);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbb, 0x11, 0x11);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbc, 0x00, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb6, 0x02);
nt35521_switch_page(&dsi_ctx, 0x01);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x09, 0x09);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb1, 0x09, 0x09);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbc, 0x8c, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbd, 0x8c, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xca, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc0, 0x04);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbe, 0xb5);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb3, 0x35, 0x35);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb4, 0x25, 0x25);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb9, 0x43, 0x43);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xba, 0x24, 0x24);
nt35521_switch_page(&dsi_ctx, 0x02);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xee, 0x03);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0,
0x00, 0xb2, 0x00, 0xb3, 0x00, 0xb6, 0x00, 0xc3,
0x00, 0xce, 0x00, 0xe1, 0x00, 0xf3, 0x01, 0x11);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb1,
0x01, 0x2e, 0x01, 0x5c, 0x01, 0x82, 0x01, 0xc3,
0x01, 0xfe, 0x02, 0x00, 0x02, 0x37, 0x02, 0x77);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb2,
0x02, 0xa1, 0x02, 0xd7, 0x02, 0xfe, 0x03, 0x2c,
0x03, 0x4b, 0x03, 0x63, 0x03, 0x8f, 0x03, 0x90);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb3, 0x03, 0x96, 0x03, 0x98);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb4,
0x00, 0x81, 0x00, 0x8b, 0x00, 0x9c, 0x00, 0xa9,
0x00, 0xb5, 0x00, 0xcb, 0x00, 0xdf, 0x01, 0x02);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb5,
0x01, 0x1f, 0x01, 0x51, 0x01, 0x7a, 0x01, 0xbf,
0x01, 0xfa, 0x01, 0xfc, 0x02, 0x34, 0x02, 0x76);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb6,
0x02, 0x9f, 0x02, 0xd7, 0x02, 0xfc, 0x03, 0x2c,
0x03, 0x4a, 0x03, 0x63, 0x03, 0x8f, 0x03, 0xa2);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb7, 0x03, 0xb8, 0x03, 0xba);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb8,
0x00, 0x01, 0x00, 0x02, 0x00, 0x0e, 0x00, 0x2a,
0x00, 0x41, 0x00, 0x67, 0x00, 0x87, 0x00, 0xb9);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb9,
0x00, 0xe2, 0x01, 0x22, 0x01, 0x54, 0x01, 0xa3,
0x01, 0xe6, 0x01, 0xe7, 0x02, 0x24, 0x02, 0x67);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xba,
0x02, 0x93, 0x02, 0xcd, 0x02, 0xf6, 0x03, 0x31,
0x03, 0x6c, 0x03, 0xe9, 0x03, 0xef, 0x03, 0xf4);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbb, 0x03, 0xf6, 0x03, 0xf7);
nt35521_switch_page(&dsi_ctx, 0x03);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x22, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb1, 0x22, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb2, 0x05, 0x00, 0x60, 0x00, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb3, 0x05, 0x00, 0x60, 0x00, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb4, 0x05, 0x00, 0x60, 0x00, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb5, 0x05, 0x00, 0x60, 0x00, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xba, 0x53, 0x00, 0x60, 0x00, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbb, 0x53, 0x00, 0x60, 0x00, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbc, 0x53, 0x00, 0x60, 0x00, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbd, 0x53, 0x00, 0x60, 0x00, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc0, 0x00, 0x34, 0x00, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc1, 0x00, 0x00, 0x34, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc2, 0x00, 0x00, 0x34, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc3, 0x00, 0x00, 0x34, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc4, 0x60);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc5, 0xc0);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc6, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc7, 0x00);
nt35521_switch_page(&dsi_ctx, 0x05);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x17, 0x06);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb1, 0x17, 0x06);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb2, 0x17, 0x06);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb3, 0x17, 0x06);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb4, 0x17, 0x06);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb5, 0x17, 0x06);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb6, 0x17, 0x06);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb7, 0x17, 0x06);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb8, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb9, 0x00, 0x03);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xba, 0x00, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbb, 0x02, 0x03);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbc, 0x02, 0x03);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbd, 0x03, 0x03, 0x00, 0x03, 0x03);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc0, 0x0b);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc1, 0x09);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc2, 0xa6);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc3, 0x05);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc4, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc5, 0x02);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc6, 0x22);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc7, 0x03);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc8, 0x07, 0x20);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc9, 0x03, 0x20);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xca, 0x01, 0x60);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xcb, 0x01, 0x60);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xcc, 0x00, 0x00, 0x02);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xcd, 0x00, 0x00, 0x02);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xce, 0x00, 0x00, 0x02);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xcf, 0x00, 0x00, 0x02);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd1, 0x00, 0x05, 0x01, 0x07, 0x10);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd2, 0x10, 0x05, 0x05, 0x03, 0x10);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd3, 0x20, 0x00, 0x43, 0x07, 0x10);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd4, 0x30, 0x00, 0x43, 0x07, 0x10);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd0,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd5,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd6,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd7,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xe5, 0x06);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xe6, 0x06);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xe7, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xe8, 0x06);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xe9, 0x06);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xea, 0x06);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xeb, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xec, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xed, 0x30);
nt35521_switch_page(&dsi_ctx, 0x06);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x31, 0x31);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb1, 0x31, 0x31);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb2, 0x2d, 0x2e);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb3, 0x31, 0x34);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb4, 0x29, 0x2a);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb5, 0x12, 0x10);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb6, 0x18, 0x16);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb7, 0x00, 0x02);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb8, 0x08, 0x31);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb9, 0x31, 0x31);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xba, 0x31, 0x31);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbb, 0x31, 0x08);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbc, 0x03, 0x01);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbd, 0x17, 0x19);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbe, 0x11, 0x13);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xbf, 0x2a, 0x29);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc0, 0x34, 0x31);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc1, 0x2e, 0x2d);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc2, 0x31, 0x31);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc3, 0x31, 0x31);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc4, 0x31, 0x31);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc5, 0x31, 0x31);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc6, 0x2e, 0x2d);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc7, 0x31, 0x34);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc8, 0x29, 0x2a);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xc9, 0x17, 0x19);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xca, 0x11, 0x13);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xcb, 0x03, 0x01);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xcc, 0x08, 0x31);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xcd, 0x31, 0x31);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xce, 0x31, 0x31);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xcf, 0x31, 0x08);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd0, 0x00, 0x02);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd1, 0x12, 0x10);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd2, 0x18, 0x16);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd3, 0x2a, 0x29);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd4, 0x34, 0x31);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd5, 0x2d, 0x2e);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd6, 0x31, 0x31);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd7, 0x31, 0x31);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xe5, 0x31, 0x31);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xe6, 0x31, 0x31);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd9, 0x00, 0x00, 0x00, 0x00, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xe7, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x6f, 0x02);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf7, 0x47);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x6f, 0x0a);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf7, 0x02);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x6f, 0x17);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf4, 0x60);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x6f, 0x01);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf9, 0x46);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x6f, 0x11);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf3, 0x01);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x35, 0x00);
nt35521_switch_page(&dsi_ctx, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xd9, 0x02, 0x03, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf0, 0x55, 0xaa, 0x52, 0x00, 0x00);
nt35521_switch_page(&dsi_ctx, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb1, 0x6c, 0x21);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xf0, 0x55, 0xaa, 0x52, 0x00, 0x00);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x35, 0x00);
mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
mipi_dsi_msleep(&dsi_ctx, 120);
mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
usleep_range(1000, 2000);
mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0x53, 0x24);
return dsi_ctx.accum_err;
}
static int truly_nt35521_off(struct truly_nt35521 *ctx)
{
struct mipi_dsi_device *dsi = ctx->dsi;
struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
mipi_dsi_msleep(&dsi_ctx, 50);
mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
mipi_dsi_msleep(&dsi_ctx, 150);
return dsi_ctx.accum_err;
}
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_drm_panel_alloc(dev, struct truly_nt35521, panel,
&truly_nt35521_panel_funcs,
DRM_MODE_CONNECTOR_DSI);
if (IS_ERR(ctx))
return PTR_ERR(ctx);
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;
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" },
{ }
};
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");
