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drivers: display: st7796s: use mipi_dbi_configure_te API

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Use the mipi_dbi_configure_te API within the st7796s display driver.
If the MIPI DBI controller supports the tearing enable signal, then
configure the ST7796S to output the TE line signal.

Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>
This commit is contained in:
Daniel DeGrasse 2024-11-11 20:40:03 +00:00 committed by Benjamin Cabé
parent 83aa4aa5c2
commit 6ed3554d20
2 changed files with 19 additions and 1 deletions
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19
drivers/display/display_st7796s.c
View file

@ -46,6 +46,8 @@ struct st7796s_config {
uint8_t pgc[14]; /* Positive gamma control */ uint8_t pgc[14]; /* Positive gamma control */
uint8_t ngc[14]; /* Negative gamma control */ uint8_t ngc[14]; /* Negative gamma control */
uint8_t madctl; /* Memory data access control */ uint8_t madctl; /* Memory data access control */
uint8_t te_mode; /* Tearing enable mode */
uint32_t te_delay; /* Tearing enable delay */
bool rgb_is_inverted; bool rgb_is_inverted;
}; };
@ -155,7 +157,7 @@ static int st7796s_write(const struct device *dev,
{ {
const struct st7796s_config *config = dev->config; const struct st7796s_config *config = dev->config;
int ret; int ret;
struct display_buffer_descriptor mipi_desc; struct display_buffer_descriptor mipi_desc = {0};
enum display_pixel_format pixfmt; enum display_pixel_format pixfmt;
ret = st7796s_set_cursor(dev, x, y, desc->width, desc->height); ret = st7796s_set_cursor(dev, x, y, desc->width, desc->height);
@ -164,6 +166,7 @@ static int st7796s_write(const struct device *dev,
} }
mipi_desc.buf_size = desc->width * desc->height * ST7796S_PIXEL_SIZE; mipi_desc.buf_size = desc->width * desc->height * ST7796S_PIXEL_SIZE;
mipi_desc.frame_incomplete = desc->frame_incomplete;
ret = mipi_dbi_command_write(config->mipi_dbi, ret = mipi_dbi_command_write(config->mipi_dbi,
&config->dbi_config, ST7796S_CMD_RAMWR, &config->dbi_config, ST7796S_CMD_RAMWR,
@ -282,6 +285,18 @@ static int st7796s_lcd_config(const struct device *dev)
return ret; return ret;
} }
/* Attempt to enable TE signal */
ret = mipi_dbi_configure_te(config->mipi_dbi, config->te_mode,
config->te_delay);
if (ret == 0) {
/* TE was enabled- send TEON, and enable vblank only */
param = 0x0; /* Set TMEM bit to 0 */
ret = st7796s_send_cmd(dev, ST7796S_CMD_TEON, &param, sizeof(param));
if (ret < 0) {
return ret;
}
}
/* Lock display configuration */ /* Lock display configuration */
param = ST7796S_LOCK_1; param = ST7796S_LOCK_1;
ret = st7796s_send_cmd(dev, ST7796S_CMD_CSCON, &param, sizeof(param)); ret = st7796s_send_cmd(dev, ST7796S_CMD_CSCON, &param, sizeof(param));
@ -385,6 +400,8 @@ static DEVICE_API(display, st7796s_api) = {
.ngc = DT_INST_PROP(n, ngc), \ .ngc = DT_INST_PROP(n, ngc), \
.madctl = DT_INST_PROP(n, madctl), \ .madctl = DT_INST_PROP(n, madctl), \
.rgb_is_inverted = DT_INST_PROP(n, rgb_is_inverted), \ .rgb_is_inverted = DT_INST_PROP(n, rgb_is_inverted), \
.te_mode = MIPI_DBI_TE_MODE_DT_INST(n, te_mode), \
.te_delay = DT_INST_PROP(n, te_delay), \
}; \ }; \
\ \
DEVICE_DT_INST_DEFINE(n, st7796s_init, \ DEVICE_DT_INST_DEFINE(n, st7796s_init, \

1
drivers/display/display_st7796s.h
View file

@ -16,6 +16,7 @@
#define ST7796S_CMD_RAMWR 0x2C /* Memory write */ #define ST7796S_CMD_RAMWR 0x2C /* Memory write */
#define ST7796S_CMD_DISPOFF 0x28 /* Display off */ #define ST7796S_CMD_DISPOFF 0x28 /* Display off */
#define ST7796S_CMD_DISPON 0x29 /* Display on */ #define ST7796S_CMD_DISPON 0x29 /* Display on */
#define ST7796S_CMD_TEON 0x35 /* Tearing effect on */
#define ST7796S_CMD_MADCTL 0x36 /* Memory data access control */ #define ST7796S_CMD_MADCTL 0x36 /* Memory data access control */
#define ST7796S_CMD_COLMOD 0x3A /* Interface pixel format */ #define ST7796S_CMD_COLMOD 0x3A /* Interface pixel format */
#define ST7796S_CMD_FRMCTR1 0xB1 /* Frame rate control 1 (normal mode) */ #define ST7796S_CMD_FRMCTR1 0xB1 /* Frame rate control 1 (normal mode) */