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 <a...@sigxcpu.org>
---
.../drm/panel/panel-rocktech-jh057n00900.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/drivers/gpu/drm/panel/panel-rocktech-jh057n00900.c
b/drivers/gpu/drm/panel/panel-rocktech-jh057n00900.c
index b8a069055fbc..f8f6f087b9bc 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>
@@ -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 +179,13 @@ 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)
+ return ret;
+ ret = regulator_enable(ctx->iovcc);
+ if (ret < 0)
+ return ret;
+
gpiod_set_value_cansleep(ctx->reset_gpio, 1);
usleep_range(20, 40);
gpiod_set_value_cansleep(ctx->reset_gpio, 0);
@@ -301,6 +313,13 @@ 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))
+ return PTR_ERR(ctx->vcc);
+ ctx->iovcc = devm_regulator_get(dev, "iovcc");
+ if (IS_ERR(ctx->iovcc))
+ return PTR_ERR(ctx->iovcc);
+
drm_panel_init(&ctx->panel);
ctx->panel.dev = dev;
ctx->panel.funcs = &jh057n_drm_funcs;
--
2.20.1
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
