[PATCH 1/2] drm/mipi-dsi: add more multi functions for better error handling

[Tejas Vipin]

Add more functions that can benefit from being multi style, which
reduces code size in panels where they appear.

Signed-off-by: Tejas Vipin <tejasvipin76 at gmail.com>
---
 drivers/gpu/drm/drm_mipi_dsi.c | 164 +++++++++++++++++++++++++++++++++
 include/drm/drm_mipi_dsi.h     |  10 ++
 2 files changed, 174 insertions(+)

diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
index a471c46f5ca6..3f7fe734b684 100644
--- a/drivers/gpu/drm/drm_mipi_dsi.c
+++ b/drivers/gpu/drm/drm_mipi_dsi.c
@@ -1639,6 +1639,170 @@ void mipi_dsi_dcs_set_tear_on_multi(struct mipi_dsi_multi_context *ctx,
 }
 EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_on_multi);
 
+/**
+ * mipi_dsi_turn_on_peripheral_multi() - sends a Turn On Peripheral command
+ * @ctx: Context for multiple DSI transactions
+ *
+ * Like mipi_dsi_turn_on_peripheral() but deals with errors in a way that
+ * makes it convenient to make several calls in a row.
+ */
+void mipi_dsi_turn_on_peripheral_multi(struct mipi_dsi_multi_context *ctx)
+{
+	struct mipi_dsi_device *dsi = ctx->dsi;
+	struct device *dev = &dsi->dev;
+	ssize_t ret;
+
+	if (ctx->accum_err)
+		return;
+
+	ret = mipi_dsi_turn_on_peripheral(dsi);
+	if (ret < 0) {
+		ctx->accum_err = ret;
+		dev_err(dev, "Failed to turn on peripheral: %d\n",
+			ctx->accum_err);
+	}
+}
+EXPORT_SYMBOL(mipi_dsi_turn_on_peripheral_multi);
+
+/**
+ * mipi_dsi_dcs_soft_reset_multi() - perform a software reset of the display module
+ * @ctx: Context for multiple DSI transactions
+ *
+ * Like mipi_dsi_dcs_soft_reset() but deals with errors in a way that
+ * makes it convenient to make several calls in a row.
+ */
+void mipi_dsi_dcs_soft_reset_multi(struct mipi_dsi_multi_context *ctx)
+{
+	struct mipi_dsi_device *dsi = ctx->dsi;
+	struct device *dev = &dsi->dev;
+	ssize_t ret;
+
+	if (ctx->accum_err)
+		return;
+
+	ret = mipi_dsi_dcs_soft_reset(dsi);
+	if (ret < 0) {
+		ctx->accum_err = ret;
+		dev_err(dev, "Failed to mipi_dsi_dcs_soft_reset: %d\n",
+			ctx->accum_err);
+	}
+}
+EXPORT_SYMBOL(mipi_dsi_dcs_soft_reset_multi);
+
+/**
+ * mipi_dsi_dcs_set_display_brightness_multi() - sets the brightness value of
+ *	the display
+ * @ctx: Context for multiple DSI transactions
+ * @brightness: brightness value
+ *
+ * Like mipi_dsi_dcs_set_display_brightness() but deals with errors in a way that
+ * makes it convenient to make several calls in a row.
+ */
+void mipi_dsi_dcs_set_display_brightness_multi(struct mipi_dsi_multi_context *ctx,
+					       u16 brightness)
+{
+	struct mipi_dsi_device *dsi = ctx->dsi;
+	struct device *dev = &dsi->dev;
+	ssize_t ret;
+
+	if (ctx->accum_err)
+		return;
+
+	ret = mipi_dsi_dcs_set_display_brightness(dsi, brightness);
+	if (ret < 0) {
+		ctx->accum_err = ret;
+		dev_err(dev, "Failed to write display brightness: %d\n",
+			ctx->accum_err);
+	}
+}
+EXPORT_SYMBOL(mipi_dsi_dcs_set_display_brightness_multi);
+
+/**
+ * mipi_dsi_dcs_set_pixel_format_multi() - sets the pixel format for the RGB image
+ *	data used by the interface
+ * @ctx: Context for multiple DSI transactions
+ * @format: pixel format
+ *
+ * Like mipi_dsi_dcs_set_pixel_format() but deals with errors in a way that
+ * makes it convenient to make several calls in a row.
+ */
+void mipi_dsi_dcs_set_pixel_format_multi(struct mipi_dsi_multi_context *ctx,
+					 u8 format)
+{
+	struct mipi_dsi_device *dsi = ctx->dsi;
+	struct device *dev = &dsi->dev;
+	ssize_t ret;
+
+	if (ctx->accum_err)
+		return;
+
+	ret = mipi_dsi_dcs_set_pixel_format(dsi, format);
+	if (ret < 0) {
+		ctx->accum_err = ret;
+		dev_err(dev, "Failed to set pixel format: %d\n",
+			ctx->accum_err);
+	}
+}
+EXPORT_SYMBOL(mipi_dsi_dcs_set_pixel_format_multi);
+
+/**
+ * mipi_dsi_dcs_set_column_address_multi() - define the column extent of the
+ *	frame memory accessed by the host processor
+ * @ctx: Context for multiple DSI transactions
+ * @start: first column of frame memory
+ * @end: last column of frame memory
+ *
+ * Like mipi_dsi_dcs_set_column_address() but deals with errors in a way that
+ * makes it convenient to make several calls in a row.
+ */
+void mipi_dsi_dcs_set_column_address_multi(struct mipi_dsi_multi_context *ctx,
+					   u16 start, u16 end)
+{
+	struct mipi_dsi_device *dsi = ctx->dsi;
+	struct device *dev = &dsi->dev;
+	ssize_t ret;
+
+	if (ctx->accum_err)
+		return;
+
+	ret = mipi_dsi_dcs_set_column_address(dsi, start, end);
+	if (ret < 0) {
+		ctx->accum_err = ret;
+		dev_err(dev, "Failed to set column address: %d\n",
+			ctx->accum_err);
+	}
+}
+EXPORT_SYMBOL(mipi_dsi_dcs_set_column_address_multi);
+
+/**
+ * mipi_dsi_dcs_set_page_address_multi() - define the column extent of the
+ *	frame memory accessed by the host processor
+ * @ctx: Context for multiple DSI transactions
+ * @start: first column of frame memory
+ * @end: last column of frame memory
+ *
+ * Like mipi_dsi_dcs_set_page_address() but deals with errors in a way that
+ * makes it convenient to make several calls in a row.
+ */
+void mipi_dsi_dcs_set_page_address_multi(struct mipi_dsi_multi_context *ctx,
+					   u16 start, u16 end)
+{
+	struct mipi_dsi_device *dsi = ctx->dsi;
+	struct device *dev = &dsi->dev;
+	ssize_t ret;
+
+	if (ctx->accum_err)
+		return;
+
+	ret = mipi_dsi_dcs_set_page_address(dsi, start, end);
+	if (ret < 0) {
+		ctx->accum_err = ret;
+		dev_err(dev, "Failed to set page address: %d\n",
+			ctx->accum_err);
+	}
+}
+EXPORT_SYMBOL(mipi_dsi_dcs_set_page_address_multi);
+
 static int mipi_dsi_drv_probe(struct device *dev)
 {
 	struct mipi_dsi_driver *drv = to_mipi_dsi_driver(dev->driver);
diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h
index 71d121aeef24..203b5d53d58f 100644
--- a/include/drm/drm_mipi_dsi.h
+++ b/include/drm/drm_mipi_dsi.h
@@ -358,6 +358,16 @@ void mipi_dsi_dcs_set_display_off_multi(struct mipi_dsi_multi_context *ctx);
 void mipi_dsi_dcs_set_display_on_multi(struct mipi_dsi_multi_context *ctx);
 void mipi_dsi_dcs_set_tear_on_multi(struct mipi_dsi_multi_context *ctx,
 				    enum mipi_dsi_dcs_tear_mode mode);
+void mipi_dsi_turn_on_peripheral_multi(struct mipi_dsi_multi_context *ctx);
+void mipi_dsi_dcs_soft_reset_multi(struct mipi_dsi_multi_context *ctx);
+void mipi_dsi_dcs_set_display_brightness_multi(struct mipi_dsi_multi_context *ctx,
+					       u16 brightness);
+void mipi_dsi_dcs_set_pixel_format_multi(struct mipi_dsi_multi_context *ctx,
+					 u8 format);
+void mipi_dsi_dcs_set_column_address_multi(struct mipi_dsi_multi_context *ctx,
+					   u16 start, u16 end);
+void mipi_dsi_dcs_set_page_address_multi(struct mipi_dsi_multi_context *ctx,
+					   u16 start, u16 end);
 
 /**
  * mipi_dsi_generic_write_seq - transmit data using a generic write packet
-- 
2.45.2