diff options
Diffstat (limited to 'drivers/gpu/drm/panel/panel-rocktech-jh057n00900.c')
| -rw-r--r-- | drivers/gpu/drm/panel/panel-rocktech-jh057n00900.c | 75 |
1 files changed, 60 insertions, 15 deletions
diff --git a/drivers/gpu/drm/panel/panel-rocktech-jh057n00900.c b/drivers/gpu/drm/panel/panel-rocktech-jh057n00900.c index 6dcb692c4701..b9109922397f 100644 --- a/drivers/gpu/drm/panel/panel-rocktech-jh057n00900.c +++ b/drivers/gpu/drm/panel/panel-rocktech-jh057n00900.c @@ -15,6 +15,7 @@ #include <linux/gpio/consumer.h> #include <linux/media-bus-format.h> #include <linux/module.h> +#include <linux/regulator/consumer.h> #include <video/display_timing.h> #include <video/mipi_display.h> @@ -33,6 +34,7 @@ #define ST7703_CMD_SETEXTC 0xB9 #define ST7703_CMD_SETMIPI 0xBA #define ST7703_CMD_SETVDC 0xBC +#define ST7703_CMD_UNKNOWN0 0xBF #define ST7703_CMD_SETSCR 0xC0 #define ST7703_CMD_SETPOWER 0xC1 #define ST7703_CMD_SETPANEL 0xCC @@ -46,6 +48,8 @@ struct jh057n { struct drm_panel panel; struct gpio_desc *reset_gpio; struct backlight_device *backlight; + struct regulator *vcc; + struct regulator *iovcc; bool prepared; struct dentry *debugfs; @@ -94,7 +98,7 @@ static int jh057n_init_sequence(struct jh057n *ctx) msleep(20); dsi_generic_write_seq(dsi, ST7703_CMD_SETVCOM, 0x3F, 0x3F); - dsi_generic_write_seq(dsi, 0xBF, 0x02, 0x11, 0x00); + dsi_generic_write_seq(dsi, ST7703_CMD_UNKNOWN0, 0x02, 0x11, 0x00); dsi_generic_write_seq(dsi, ST7703_CMD_SETGIP1, 0x82, 0x10, 0x06, 0x05, 0x9E, 0x0A, 0xA5, 0x12, 0x31, 0x23, 0x37, 0x83, 0x04, 0xBC, 0x27, 0x38, @@ -123,7 +127,7 @@ static int jh057n_init_sequence(struct jh057n *ctx) ret = mipi_dsi_dcs_exit_sleep_mode(dsi); if (ret < 0) { - DRM_DEV_ERROR(dev, "Failed to exit sleep mode\n"); + DRM_DEV_ERROR(dev, "Failed to exit sleep mode: %d\n", ret); return ret; } /* Panel is operational 120 msec after reset */ @@ -139,6 +143,14 @@ static int jh057n_init_sequence(struct jh057n *ctx) static int jh057n_enable(struct drm_panel *panel) { struct jh057n *ctx = panel_to_jh057n(panel); + int ret; + + ret = jh057n_init_sequence(ctx); + if (ret < 0) { + DRM_DEV_ERROR(ctx->dev, "Panel init sequence failed: %d\n", + ret); + return ret; + } return backlight_enable(ctx->backlight); } @@ -146,19 +158,21 @@ static int jh057n_enable(struct drm_panel *panel) static int jh057n_disable(struct drm_panel *panel) { struct jh057n *ctx = panel_to_jh057n(panel); + struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev); - return backlight_disable(ctx->backlight); + backlight_disable(ctx->backlight); + return mipi_dsi_dcs_set_display_off(dsi); } static int jh057n_unprepare(struct drm_panel *panel) { struct jh057n *ctx = panel_to_jh057n(panel); - struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev); if (!ctx->prepared) return 0; - mipi_dsi_dcs_set_display_off(dsi); + regulator_disable(ctx->iovcc); + regulator_disable(ctx->vcc); ctx->prepared = false; return 0; @@ -173,21 +187,31 @@ static int jh057n_prepare(struct drm_panel *panel) return 0; DRM_DEV_DEBUG_DRIVER(ctx->dev, "Resetting the panel\n"); + ret = regulator_enable(ctx->vcc); + if (ret < 0) { + DRM_DEV_ERROR(ctx->dev, + "Failed to enable vcc supply: %d\n", ret); + return ret; + } + ret = regulator_enable(ctx->iovcc); + if (ret < 0) { + DRM_DEV_ERROR(ctx->dev, + "Failed to enable iovcc supply: %d\n", ret); + goto disable_vcc; + } + gpiod_set_value_cansleep(ctx->reset_gpio, 1); usleep_range(20, 40); gpiod_set_value_cansleep(ctx->reset_gpio, 0); msleep(20); - ret = jh057n_init_sequence(ctx); - if (ret < 0) { - DRM_DEV_ERROR(ctx->dev, "Panel init sequence failed: %d\n", - ret); - return ret; - } - ctx->prepared = true; return 0; + +disable_vcc: + regulator_disable(ctx->vcc); + return ret; } static const struct drm_display_mode default_mode = { @@ -300,6 +324,25 @@ static int jh057n_probe(struct mipi_dsi_device *dsi) if (IS_ERR(ctx->backlight)) return PTR_ERR(ctx->backlight); + ctx->vcc = devm_regulator_get(dev, "vcc"); + if (IS_ERR(ctx->vcc)) { + ret = PTR_ERR(ctx->vcc); + if (ret != -EPROBE_DEFER) + DRM_DEV_ERROR(dev, + "Failed to request vcc regulator: %d\n", + ret); + return ret; + } + ctx->iovcc = devm_regulator_get(dev, "iovcc"); + if (IS_ERR(ctx->iovcc)) { + ret = PTR_ERR(ctx->iovcc); + if (ret != -EPROBE_DEFER) + DRM_DEV_ERROR(dev, + "Failed to request iovcc regulator: %d\n", + ret); + return ret; + } + drm_panel_init(&ctx->panel); ctx->panel.dev = dev; ctx->panel.funcs = &jh057n_drm_funcs; @@ -308,7 +351,9 @@ static int jh057n_probe(struct mipi_dsi_device *dsi) ret = mipi_dsi_attach(dsi); if (ret < 0) { - DRM_DEV_ERROR(dev, "mipi_dsi_attach failed. Is host ready?\n"); + DRM_DEV_ERROR(dev, + "mipi_dsi_attach failed (%d). Is host ready?\n", + ret); drm_panel_remove(&ctx->panel); return ret; } @@ -327,12 +372,12 @@ static void jh057n_shutdown(struct mipi_dsi_device *dsi) struct jh057n *ctx = mipi_dsi_get_drvdata(dsi); int ret; - ret = jh057n_unprepare(&ctx->panel); + ret = drm_panel_unprepare(&ctx->panel); if (ret < 0) DRM_DEV_ERROR(&dsi->dev, "Failed to unprepare panel: %d\n", ret); - ret = jh057n_disable(&ctx->panel); + ret = drm_panel_disable(&ctx->panel); if (ret < 0) DRM_DEV_ERROR(&dsi->dev, "Failed to disable panel: %d\n", ret); |