[PATCH 1/6] mipi_dsi: add mipi_dsi_{generic/dcs}_write_seq helper macros

Add wrapper mipi_dsi_generic_write_seq and mipi_dsi_dcs_write_seq helper
macros around mipi_dsi_generic_write and mipi_dsi_dcs_write_buffer to
mimic macros defined in the Kernel. This helps porting drivers from the
Kernel and avoids the manual declaration of static arrays in drivers.

Some drivers (hitachi-tx10d07vm0baa.c, lg-lh400wv3-sd04.c, mot-panel.c,
renesas-r69328.c and himax-hx8394.c) already define such a macro, so
this will avoid duplication.

Signed-off-by: Julien Stephan <[email protected]>
---
 include/mipi_dsi.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/include/mipi_dsi.h b/include/mipi_dsi.h
index 4ca05f71e29..fcad42d5145 100644
--- a/include/mipi_dsi.h
+++ b/include/mipi_dsi.h
@@ -267,6 +267,15 @@ int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi,
 
 ssize_t mipi_dsi_generic_write(struct mipi_dsi_device *dsi, const void *payload,
 			       size_t size);
+
+#define mipi_dsi_generic_write_seq(dsi, cmd, seq...) do {		\
+		static const u8 b[] = { cmd, seq };			\
+		int ret;						\
+		ret = mipi_dsi_generic_write(dsi, b, ARRAY_SIZE(b));	\
+		if (ret < 0)						\
+			return ret;					\
+	} while (0)
+
 ssize_t mipi_dsi_generic_read(struct mipi_dsi_device *dsi, const void *params,
 			      size_t num_params, void *data, size_t size);
 
@@ -303,6 +312,14 @@ enum mipi_dsi_dcs_tear_mode {
 ssize_t mipi_dsi_dcs_write_buffer(struct mipi_dsi_device *dsi,
 				  const void *data, size_t len);
 
+#define mipi_dsi_dcs_write_seq(dsi, cmd, seq...) do {			\
+		static const u8 b[] = { cmd, seq };			\
+		int ret;						\
+		ret = mipi_dsi_dcs_write_buffer(dsi, b, ARRAY_SIZE(b));	\
+		if (ret < 0)						\
+			return ret;					\
+	} while (0)
+
 /**
  * mipi_dsi_dcs_write() - send DCS write command
  * @dsi: DSI peripheral device

-- 
2.54.0