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path: root/drivers/gpu/drm/sitronix
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Diffstat (limited to 'drivers/gpu/drm/sitronix')
-rw-r--r--drivers/gpu/drm/sitronix/Kconfig11
-rw-r--r--drivers/gpu/drm/sitronix/st7571-i2c.c95
2 files changed, 88 insertions, 18 deletions
diff --git a/drivers/gpu/drm/sitronix/Kconfig b/drivers/gpu/drm/sitronix/Kconfig
index c069d0d41775..6de7d92d9b74 100644
--- a/drivers/gpu/drm/sitronix/Kconfig
+++ b/drivers/gpu/drm/sitronix/Kconfig
@@ -5,15 +5,12 @@ config DRM_ST7571_I2C
select DRM_GEM_SHMEM_HELPER
select DRM_KMS_HELPER
select REGMAP_I2C
+ select VIDEOMODE_HELPERS
help
DRM driver for Sitronix ST7571 panels controlled over I2C.
if M is selected the module will be called st7571-i2c.
-config TINYDRM_ST7586
- tristate
- default n
-
config DRM_ST7586
tristate "DRM support for Sitronix ST7586 display panels"
depends on DRM && SPI
@@ -21,17 +18,12 @@ config DRM_ST7586
select DRM_KMS_HELPER
select DRM_GEM_DMA_HELPER
select DRM_MIPI_DBI
- default TINYDRM_ST7586
help
DRM driver for the following Sitronix ST7586 panels:
* LEGO MINDSTORMS EV3
If M is selected the module will be called st7586.
-config TINYDRM_ST7735R
- tristate
- default n
-
config DRM_ST7735R
tristate "DRM support for Sitronix ST7715R/ST7735R display panels"
depends on DRM && SPI
@@ -40,7 +32,6 @@ config DRM_ST7735R
select DRM_GEM_DMA_HELPER
select DRM_MIPI_DBI
select BACKLIGHT_CLASS_DEVICE
- default TINYDRM_ST7735R
help
DRM driver for Sitronix ST7715R/ST7735R with one of the following
LCDs:
diff --git a/drivers/gpu/drm/sitronix/st7571-i2c.c b/drivers/gpu/drm/sitronix/st7571-i2c.c
index eec846892962..453eb7e045e5 100644
--- a/drivers/gpu/drm/sitronix/st7571-i2c.c
+++ b/drivers/gpu/drm/sitronix/st7571-i2c.c
@@ -68,6 +68,9 @@
#define ST7571_SET_COLOR_MODE(c) (0x10 | FIELD_PREP(GENMASK(0, 0), (c)))
#define ST7571_COMMAND_SET_NORMAL (0x00)
+/* ST7567 commands */
+#define ST7567_SET_LCD_BIAS(m) (0xa2 | FIELD_PREP(GENMASK(0, 0), (m)))
+
#define ST7571_PAGE_HEIGHT 8
#define DRIVER_NAME "st7571"
@@ -92,6 +95,7 @@ struct st7571_panel_constraints {
struct st7571_panel_data {
int (*init)(struct st7571_device *st7571);
+ int (*parse_dt)(struct st7571_device *st7571);
struct st7571_panel_constraints constraints;
};
@@ -550,8 +554,8 @@ static const struct drm_crtc_funcs st7571_crtc_funcs = {
* Encoder
*/
-static void ssd130x_encoder_atomic_enable(struct drm_encoder *encoder,
- struct drm_atomic_state *state)
+static void st7571_encoder_atomic_enable(struct drm_encoder *encoder,
+ struct drm_atomic_state *state)
{
struct drm_device *drm = encoder->dev;
struct st7571_device *st7571 = drm_to_st7571(drm);
@@ -565,8 +569,8 @@ static void ssd130x_encoder_atomic_enable(struct drm_encoder *encoder,
st7571_send_command_list(st7571, &command, 1);
}
-static void ssd130x_encoder_atomic_disable(struct drm_encoder *encoder,
- struct drm_atomic_state *state)
+static void st7571_encoder_atomic_disable(struct drm_encoder *encoder,
+ struct drm_atomic_state *state)
{
struct drm_device *drm = encoder->dev;
struct st7571_device *st7571 = drm_to_st7571(drm);
@@ -581,8 +585,8 @@ static const struct drm_encoder_funcs st7571_encoder_funcs = {
};
static const struct drm_encoder_helper_funcs st7571_encoder_helper_funcs = {
- .atomic_enable = ssd130x_encoder_atomic_enable,
- .atomic_disable = ssd130x_encoder_atomic_disable,
+ .atomic_enable = st7571_encoder_atomic_enable,
+ .atomic_disable = st7571_encoder_atomic_disable,
};
/*
@@ -773,6 +777,32 @@ static int st7571_validate_parameters(struct st7571_device *st7571)
return 0;
}
+static int st7567_parse_dt(struct st7571_device *st7567)
+{
+ struct device *dev = &st7567->client->dev;
+ struct device_node *np = dev->of_node;
+ struct display_timing dt;
+ int ret;
+
+ ret = of_get_display_timing(np, "panel-timing", &dt);
+ if (ret) {
+ dev_err(dev, "Failed to get display timing from DT\n");
+ return ret;
+ }
+
+ of_property_read_u32(np, "width-mm", &st7567->width_mm);
+ of_property_read_u32(np, "height-mm", &st7567->height_mm);
+
+ st7567->pformat = &st7571_monochrome;
+ st7567->bpp = 1;
+
+ st7567->startline = dt.vfront_porch.typ;
+ st7567->nlines = dt.vactive.typ;
+ st7567->ncols = dt.hactive.typ;
+
+ return 0;
+}
+
static int st7571_parse_dt(struct st7571_device *st7571)
{
struct device *dev = &st7571->client->dev;
@@ -804,7 +834,9 @@ static int st7571_parse_dt(struct st7571_device *st7571)
st7571->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(st7571->reset))
- return PTR_ERR(st7571->reset);
+ return dev_err_probe(dev, PTR_ERR(st7571->reset),
+ "Failed to get reset gpio\n");
+
return 0;
}
@@ -816,6 +848,38 @@ static void st7571_reset(struct st7571_device *st7571)
gpiod_set_value_cansleep(st7571->reset, 0);
}
+static int st7567_lcd_init(struct st7571_device *st7567)
+{
+ /*
+ * Most of the initialization sequence is taken directly from the
+ * referential initial code in the ST7567 datasheet.
+ */
+ u8 commands[] = {
+ ST7571_DISPLAY_OFF,
+
+ ST7567_SET_LCD_BIAS(1),
+
+ ST7571_SET_SEG_SCAN_DIR(0),
+ ST7571_SET_COM_SCAN_DIR(1),
+
+ ST7571_SET_REGULATOR_REG(4),
+ ST7571_SET_CONTRAST_MSB,
+ ST7571_SET_CONTRAST_LSB(0x20),
+
+ ST7571_SET_START_LINE_MSB,
+ ST7571_SET_START_LINE_LSB(st7567->startline),
+
+ ST7571_SET_POWER(0x4), /* Power Control, VC: ON, VR: OFF, VF: OFF */
+ ST7571_SET_POWER(0x6), /* Power Control, VC: ON, VR: ON, VF: OFF */
+ ST7571_SET_POWER(0x7), /* Power Control, VC: ON, VR: ON, VF: ON */
+
+ ST7571_SET_REVERSE(0),
+ ST7571_SET_ENTIRE_DISPLAY_ON(0),
+ };
+
+ return st7571_send_command_list(st7567, commands, ARRAY_SIZE(commands));
+}
+
static int st7571_lcd_init(struct st7571_device *st7571)
{
/*
@@ -879,7 +943,7 @@ static int st7571_probe(struct i2c_client *client)
i2c_set_clientdata(client, st7571);
st7571->pdata = device_get_match_data(&client->dev);
- ret = st7571_parse_dt(st7571);
+ ret = st7571->pdata->parse_dt(st7571);
if (ret)
return ret;
@@ -960,8 +1024,21 @@ static void st7571_remove(struct i2c_client *client)
drm_dev_unplug(&st7571->dev);
}
+struct st7571_panel_data st7567_config = {
+ .init = st7567_lcd_init,
+ .parse_dt = st7567_parse_dt,
+ .constraints = {
+ .min_nlines = 1,
+ .max_nlines = 64,
+ .min_ncols = 128,
+ .max_ncols = 128,
+ .support_grayscale = false,
+ },
+};
+
struct st7571_panel_data st7571_config = {
.init = st7571_lcd_init,
+ .parse_dt = st7571_parse_dt,
.constraints = {
.min_nlines = 1,
.max_nlines = 128,
@@ -972,12 +1049,14 @@ struct st7571_panel_data st7571_config = {
};
static const struct of_device_id st7571_of_match[] = {
+ { .compatible = "sitronix,st7567", .data = &st7567_config },
{ .compatible = "sitronix,st7571", .data = &st7571_config },
{},
};
MODULE_DEVICE_TABLE(of, st7571_of_match);
static const struct i2c_device_id st7571_id[] = {
+ { "st7567", 0 },
{ "st7571", 0 },
{ }
};
generated by cgit (git 2.34.1) at 2025-07-31 23:15:10 +0000