@@ -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>
@@ -47,6 +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;
@@ -160,6 +163,8 @@ static int jh057n_unprepare(struct drm_panel *panel)
return 0;
mipi_dsi_dcs_set_display_off(dsi);
+ regulator_disable(ctx->iovcc);
+ regulator_disable(ctx->vcc);
ctx->prepared = false;
return 0;
@@ -174,6 +179,19 @@ 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);
@@ -189,6 +207,10 @@ static int jh057n_prepare(struct drm_panel *panel)
ctx->prepared = true;
return 0;
+
+disable_vcc:
+ regulator_disable(ctx->vcc);
+ return ret;
}
static const struct drm_display_mode default_mode = {
@@ -301,6 +323,25 @@ 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;
Allow to specify regulators for vcc and iovcc. According to the data sheet the panel wants vcc (2.8V) and iovcc (1.8V) and there's no startup dependency between the two. Signed-off-by: Guido Günther <agx@sigxcpu.org> --- .../drm/panel/panel-rocktech-jh057n00900.c | 41 +++++++++++++++++++ 1 file changed, 41 insertions(+)