From 2a9e9daf75231c2f577209af5ec62aecdf7ca7af Mon Sep 17 00:00:00 2001
From: Joel Selvaraj <jo@jsfamily.in>
Date: Wed, 1 Jun 2022 13:54:09 +0530
Subject: [PATCH] drm/mipi-dsi: Introduce mipi_dsi_dcs_write_seq macro
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
---
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 51e09a1a106a3..91a164bdd8f3c 100644
--- a/include/drm/drm_mipi_dsi.h
+++ b/include/drm/drm_mipi_dsi.h
@@ -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
--
GitLab