drm/mipi-dsi: extend "multi" functions and use them in sony-td4353-jdi

Removes mipi_dsi_dcs_set_tear_off and replaces it with a
multi version as after replacing it in sony-td4353-jdi, it doesn't
appear anywhere else. sony-td4353-jdi is converted to use multi style
functions, including mipi_dsi_dcs_set_tear_off_multi.

Signed-off-by: Tejas Vipin <tejasvipin76@gmail.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20250220045721.145905-1-tejasvipin76@gmail.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20250220045721.145905-1-tejasvipin76@gmail.com

drivers/gpu/drm/drm_mipi_dsi.c

@@ -1265,25 +1265,6 @@ int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start,
 }
 EXPORT_SYMBOL(mipi_dsi_dcs_set_page_address);
 
-/**
- * mipi_dsi_dcs_set_tear_off() - turn off the display module's Tearing Effect
- *    output signal on the TE signal line
- * @dsi: DSI peripheral device
- *
- * Return: 0 on success or a negative error code on failure
- */
-int mipi_dsi_dcs_set_tear_off(struct mipi_dsi_device *dsi)
-{
-	ssize_t err;
-
-	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_TEAR_OFF, NULL, 0);
-	if (err < 0)
-		return err;
-
-	return 0;
-}
-EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_off);
-
 /**
  * mipi_dsi_dcs_set_tear_on() - turn on the display module's Tearing Effect
  *    output signal on the TE signal line.
@@ -1713,6 +1694,29 @@ void mipi_dsi_turn_on_peripheral_multi(struct mipi_dsi_multi_context *ctx)
 }
 EXPORT_SYMBOL(mipi_dsi_turn_on_peripheral_multi);
 
+/**
+ * mipi_dsi_dcs_set_tear_off_multi() - turn off the display module's Tearing Effect
+ *    output signal on the TE signal line
+ * @ctx: Context for multiple DSI transactions
+ */
+void mipi_dsi_dcs_set_tear_off_multi(struct mipi_dsi_multi_context *ctx)
+{
+	struct mipi_dsi_device *dsi = ctx->dsi;
+	struct device *dev = &dsi->dev;
+	ssize_t err;
+
+	if (ctx->accum_err)
+		return;
+
+	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_TEAR_OFF, NULL, 0);
+	if (err < 0) {
+		ctx->accum_err = err;
+		dev_err(dev, "Failed to set tear off: %d\n",
+			ctx->accum_err);
+	}
+}
+EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_off_multi);
+
 /**
  * mipi_dsi_dcs_soft_reset_multi() - perform a software reset of the display module
  * @ctx: Context for multiple DSI transactions

drivers/gpu/drm/panel/panel-sony-td4353-jdi.c

@@ -47,93 +47,40 @@ static inline struct sony_td4353_jdi *to_sony_td4353_jdi(struct drm_panel *panel
 static int sony_td4353_jdi_on(struct sony_td4353_jdi *ctx)
 {
 	struct mipi_dsi_device *dsi = ctx->dsi;
-	struct device *dev = &dsi->dev;
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
-	int ret;
 
 	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
 
-	ret = mipi_dsi_dcs_set_column_address(dsi, 0x0000, 1080 - 1);
+	mipi_dsi_dcs_set_column_address_multi(&dsi_ctx, 0x0000, 1080 - 1);
-	if (ret < 0) {
+	mipi_dsi_dcs_set_page_address_multi(&dsi_ctx, 0x0000, 2160 - 1);
-		dev_err(dev, "Failed to set column address: %d\n", ret);
+	mipi_dsi_dcs_set_tear_scanline_multi(&dsi_ctx, 0);
-		return ret;
+	mipi_dsi_dcs_set_tear_on_multi(&dsi_ctx, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
-	}
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_SET_ADDRESS_MODE, 0x00);
 
-	ret = mipi_dsi_dcs_set_page_address(dsi, 0x0000, 2160 - 1);
+	mipi_dsi_dcs_set_pixel_format_multi(&dsi_ctx, 0x77);
-	if (ret < 0) {
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_SET_PARTIAL_ROWS,
-		dev_err(dev, "Failed to set page address: %d\n", ret);
+				     0x00, 0x00, 0x08, 0x6f);
-		return ret;
-	}
 
-	ret = mipi_dsi_dcs_set_tear_scanline(dsi, 0);
+	mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
-	if (ret < 0) {
+	mipi_dsi_msleep(&dsi_ctx, 70);
-		dev_err(dev, "Failed to set tear scanline: %d\n", ret);
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_MEMORY_START);
-		return ret;
+	mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
-	}
 
-	ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
+	return dsi_ctx.accum_err;
-	if (ret < 0) {
-		dev_err(dev, "Failed to set tear on: %d\n", ret);
-		return ret;
-	}
-
-	mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_SET_ADDRESS_MODE, 0x00);
-
-	ret = mipi_dsi_dcs_set_pixel_format(dsi, 0x77);
-	if (ret < 0) {
-		dev_err(dev, "Failed to set pixel format: %d\n", ret);
-		return ret;
-	}
-
-	mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_SET_PARTIAL_ROWS,
-			  0x00, 0x00, 0x08, 0x6f);
-
-	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
-	if (ret < 0) {
-		dev_err(dev, "Failed to exit sleep mode: %d\n", ret);
-		return ret;
-	}
-	msleep(70);
-
-	mipi_dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_MEMORY_START);
-
-	ret = mipi_dsi_dcs_set_display_on(dsi);
-	if (ret < 0) {
-		dev_err(dev, "Failed to turn display on: %d\n", ret);
-		return ret;
-	}
-
-	return 0;
 }
 
-static int sony_td4353_jdi_off(struct sony_td4353_jdi *ctx)
+static void sony_td4353_jdi_off(struct sony_td4353_jdi *ctx)
 {
 	struct mipi_dsi_device *dsi = ctx->dsi;
-	struct device *dev = &dsi->dev;
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
-	int ret;
 
 	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
 
-	ret = mipi_dsi_dcs_set_display_off(dsi);
+	mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
-	if (ret < 0) {
+	mipi_dsi_msleep(&dsi_ctx, 22);
-		dev_err(dev, "Failed to set display off: %d\n", ret);
+	mipi_dsi_dcs_set_tear_off_multi(&dsi_ctx);
-		return ret;
+	mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
-	}
+	mipi_dsi_msleep(&dsi_ctx, 80);
-	msleep(22);
-
-	ret = mipi_dsi_dcs_set_tear_off(dsi);
-	if (ret < 0) {
-		dev_err(dev, "Failed to set tear off: %d\n", ret);
-		return ret;
-	}
-
-	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
-	if (ret < 0) {
-		dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
-		return ret;
-	}
-	msleep(80);
-
-	return 0;
 }
 
 static void sony_td4353_assert_reset_gpios(struct sony_td4353_jdi *ctx, int mode)
@@ -146,14 +93,11 @@ static void sony_td4353_assert_reset_gpios(struct sony_td4353_jdi *ctx, int mode
 static int sony_td4353_jdi_prepare(struct drm_panel *panel)
 {
 	struct sony_td4353_jdi *ctx = to_sony_td4353_jdi(panel);
-	struct device *dev = &ctx->dsi->dev;
 	int ret;
 
 	ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
-	if (ret < 0) {
+	if (ret < 0)
-		dev_err(dev, "Failed to enable regulators: %d\n", ret);
 		return ret;
-	}
 
 	msleep(100);
 
@@ -161,7 +105,6 @@ static int sony_td4353_jdi_prepare(struct drm_panel *panel)
 
 	ret = sony_td4353_jdi_on(ctx);
 	if (ret < 0) {
-		dev_err(dev, "Failed to power on panel: %d\n", ret);
 		sony_td4353_assert_reset_gpios(ctx, 0);
 		regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
 		return ret;
@@ -173,12 +116,8 @@ static int sony_td4353_jdi_prepare(struct drm_panel *panel)
 static int sony_td4353_jdi_unprepare(struct drm_panel *panel)
 {
 	struct sony_td4353_jdi *ctx = to_sony_td4353_jdi(panel);
-	struct device *dev = &ctx->dsi->dev;
-	int ret;
 
-	ret = sony_td4353_jdi_off(ctx);
+	sony_td4353_jdi_off(ctx);
-	if (ret < 0)
-		dev_err(dev, "Failed to power off panel: %d\n", ret);
 
 	sony_td4353_assert_reset_gpios(ctx, 0);
 	regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);

include/drm/drm_mipi_dsi.h

@@ -346,7 +346,6 @@ int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device *dsi, u16 start,
 				    u16 end);
 int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start,
 				  u16 end);
-int mipi_dsi_dcs_set_tear_off(struct mipi_dsi_device *dsi);
 int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi,
 			     enum mipi_dsi_dcs_tear_mode mode);
 int mipi_dsi_dcs_set_pixel_format(struct mipi_dsi_device *dsi, u8 format);
@@ -379,6 +378,7 @@ void mipi_dsi_dcs_set_page_address_multi(struct mipi_dsi_multi_context *ctx,
 					 u16 start, u16 end);
 void mipi_dsi_dcs_set_tear_scanline_multi(struct mipi_dsi_multi_context *ctx,
 					  u16 scanline);
+void mipi_dsi_dcs_set_tear_off_multi(struct mipi_dsi_multi_context *ctx);
 
 /**
  * mipi_dsi_generic_write_seq - transmit data using a generic write packet