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@xxxxxxxxxxx>
---
Changes in v4: (Linus Walleij's Suggestion)
- Introduce mipi_dsi_dcs_write_seq macro in include/drm/drm_mipi_dsi.h
include/drm/drm_mipi_dsi.h | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h
index 147e51b6d241..4a5996901689 100644
--- a/include/drm/drm_mipi_dsi.h
+++ b/include/drm/drm_mipi_dsi.h
@@ -293,6 +293,23 @@ 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
--
2.36.1
