drm/panel: jdi-lt070me05000: Use MIPI DSI multi functions

Convert to the non-deprecated mipi_dsi_*_multi() helpers per the TODO
list. This reduces boilerplate error checking while providing proper
error accumulation.

Use mipi_dsi_msleep() and mipi_dsi_usleep_range() macros for delays.
Replace mdelay(10) and mdelay(20) with mipi_dsi_usleep_range() calls
using tighter slop (10-11ms and 20-21ms respectively) since these
functions aren't run often and don't need large timing windows.

In jdi_panel_off(), reset the error context between display_off and
enter_sleep_mode to preserve the original behavior of continuing power-down
even if display_off fails. This ensures enter_sleep_mode executes before
GPIO/regulator control, which is critical for proper power sequencing.

Signed-off-by: Chintan Patel <chintanlike@gmail.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://patch.msgid.link/20260203044605.5890-1-chintanlike@gmail.com

1 files changed, 24 insertions, 81 deletions

diff --git a/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c b/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c
index 3513e5c4dd8c..01bd748aecec 100644
--- a/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c
+++ b/drivers/gpu/drm/panel/panel-jdi-lt070me05000.c
@@ -48,34 +48,16 @@ static inline struct jdi_panel *to_jdi_panel(struct drm_panel *panel)
 static int jdi_panel_init(struct jdi_panel *jdi)
 {
 	struct mipi_dsi_device *dsi = jdi->dsi;
-	struct device *dev = &jdi->dsi->dev;
-	int ret;
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
 
 	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
 
-	ret = mipi_dsi_dcs_soft_reset(dsi);
-	if (ret < 0)
-		return ret;
-
-	usleep_range(10000, 20000);
-
-	ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT << 4);
-	if (ret < 0) {
-		dev_err(dev, "failed to set pixel format: %d\n", ret);
-		return ret;
-	}
-
-	ret = mipi_dsi_dcs_set_column_address(dsi, 0, jdi->mode->hdisplay - 1);
-	if (ret < 0) {
-		dev_err(dev, "failed to set column address: %d\n", ret);
-		return ret;
-	}
+	mipi_dsi_dcs_soft_reset_multi(&dsi_ctx);
+	mipi_dsi_usleep_range(&dsi_ctx, 10000, 20000);
 
-	ret = mipi_dsi_dcs_set_page_address(dsi, 0, jdi->mode->vdisplay - 1);
-	if (ret < 0) {
-		dev_err(dev, "failed to set page address: %d\n", ret);
-		return ret;
-	}
+	mipi_dsi_dcs_set_pixel_format_multi(&dsi_ctx, MIPI_DCS_PIXEL_FMT_24BIT << 4);
+	mipi_dsi_dcs_set_column_address_multi(&dsi_ctx, 0, jdi->mode->hdisplay - 1);
+	mipi_dsi_dcs_set_page_address_multi(&dsi_ctx, 0, jdi->mode->vdisplay - 1);
 
 	/*
 	 * BIT(5) BCTRL = 1 Backlight Control Block On, Brightness registers
@@ -83,88 +65,49 @@ static int jdi_panel_init(struct jdi_panel *jdi)
 	 * BIT(3) BL = 1    Backlight Control On
 	 * BIT(2) DD = 0    Display Dimming is Off
 	 */
-	ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY,
-				 (u8[]){ 0x24 }, 1);
-	if (ret < 0) {
-		dev_err(dev, "failed to write control display: %d\n", ret);
-		return ret;
-	}
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_CONTROL_DISPLAY, 0x24);
 
 	/* CABC off */
-	ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_WRITE_POWER_SAVE,
-				 (u8[]){ 0x00 }, 1);
-	if (ret < 0) {
-		dev_err(dev, "failed to set cabc off: %d\n", ret);
-		return ret;
-	}
+	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
 
-	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
-	if (ret < 0) {
-		dev_err(dev, "failed to set exit sleep mode: %d\n", ret);
-		return ret;
-	}
-
-	msleep(120);
-
-	ret = mipi_dsi_generic_write(dsi, (u8[]){0xB0, 0x00}, 2);
-	if (ret < 0) {
-		dev_err(dev, "failed to set mcap: %d\n", ret);
-		return ret;
-	}
+	mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
+	mipi_dsi_msleep(&dsi_ctx, 120);
 
-	mdelay(10);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x00);
+	mipi_dsi_usleep_range(&dsi_ctx, 10000, 11000);
 
 	/* Interface setting, video mode */
-	ret = mipi_dsi_generic_write(dsi, (u8[])
-				     {0xB3, 0x26, 0x08, 0x00, 0x20, 0x00}, 6);
-	if (ret < 0) {
-		dev_err(dev, "failed to set display interface setting: %d\n"
-			, ret);
-		return ret;
-	}
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb3, 0x26, 0x08, 0x00, 0x20, 0x00);
+	mipi_dsi_usleep_range(&dsi_ctx, 20000, 21000);
 
-	mdelay(20);
+	mipi_dsi_generic_write_seq_multi(&dsi_ctx, 0xb0, 0x03);
 
-	ret = mipi_dsi_generic_write(dsi, (u8[]){0xB0, 0x03}, 2);
-	if (ret < 0) {
-		dev_err(dev, "failed to set default values for mcap: %d\n"
-			, ret);
-		return ret;
-	}
-
-	return 0;
+	return dsi_ctx.accum_err;
 }
 
 static int jdi_panel_on(struct jdi_panel *jdi)
 {
 	struct mipi_dsi_device *dsi = jdi->dsi;
-	struct device *dev = &jdi->dsi->dev;
-	int ret;
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
 
 	dsi->mode_flags |= MIPI_DSI_MODE_LPM;
 
-	ret = mipi_dsi_dcs_set_display_on(dsi);
-	if (ret < 0)
-		dev_err(dev, "failed to set display on: %d\n", ret);
+	mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
 
-	return ret;
+	return dsi_ctx.accum_err;
 }
 
 static void jdi_panel_off(struct jdi_panel *jdi)
 {
 	struct mipi_dsi_device *dsi = jdi->dsi;
-	struct device *dev = &jdi->dsi->dev;
-	int ret;
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = dsi };
 
 	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
 
-	ret = mipi_dsi_dcs_set_display_off(dsi);
-	if (ret < 0)
-		dev_err(dev, "failed to set display off: %d\n", ret);
-
-	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
-	if (ret < 0)
-		dev_err(dev, "failed to enter sleep mode: %d\n", ret);
+	mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
+	/* Reset error to continue power-down even if display off failed */
+	dsi_ctx.accum_err = 0;
+	mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
 
 	msleep(100);
 }