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drm/mipi-dsi: Introduce mipi_dsi_dcs_write_seq macro

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A helper macro that can be used to simplify sending DCS commands.
It is useful in scenarios like panel initialization which can sometimes
involve sending lot of DCS commands.

Signed-off-by: Joel Selvaraj <jo@jsfamily.in>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/BY5PR02MB700952493EEB6F0E77DC8416D9DF9@BY5PR02MB7009.namprd02.prod.outlook.com
This commit is contained in:
Joel Selvaraj 2022-06-01 13:54:09 +05:30 committed by Sam Ravnborg
parent c5ec5fa393
commit 2a9e9daf75
1 changed files with 17 additions and 0 deletions
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17
include/drm/drm_mipi_dsi.h
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@ -295,6 +295,23 @@ int mipi_dsi_dcs_set_display_brightness(struct mipi_dsi_device *dsi,
int mipi_dsi_dcs_get_display_brightness(struct mipi_dsi_device *dsi,
u16 *brightness);
/**
* mipi_dsi_dcs_write_seq - transmit a DCS command with payload
* @dsi: DSI peripheral device
* @cmd: Command
* @seq: buffer containing data to be transmitted
*/
#define mipi_dsi_dcs_write_seq(dsi, cmd, seq...) do { \
static const u8 d[] = { cmd, seq }; \
struct device *dev = &dsi->dev; \
int ret; \
ret = mipi_dsi_dcs_write_buffer(dsi, d, ARRAY_SIZE(d)); \
if (ret < 0) { \
dev_err_ratelimited(dev, "sending command %#02x failed: %d\n", cmd, ret); \
return ret; \
} \
} while (0)
/**
* struct mipi_dsi_driver - DSI driver
* @driver: device driver model driver