[PATCH] drm/panel: kingdisplay-kd097d04: Use mipi_dsi_*_multi() functions

[Archit More <architmore303@gmail.com>]

    The mipi_dsi_dcs_*() and mipi_dsi_generic_write() functions used
    by this driver are deprecated in favor of their _multi() counterparts,
    as noted in Documentation/gpu/todo.rst.

    Convert disable(), unprepare(), and prepare() to use the _multi() APIs.

Signed-off-by: Archit More <architmore303@gmail.com>
---
 .../drm/panel/panel-kingdisplay-kd097d04.c    | 54 ++++++-------------
 1 file changed, 17 insertions(+), 37 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c b/drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c
index 893af9b16756..01f5a96f1cfb 100644
--- a/drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c
+++ b/drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c
@@ -180,28 +180,21 @@ struct kingdisplay_panel *to_kingdisplay_panel(struct drm_panel *panel)
 static int kingdisplay_panel_disable(struct drm_panel *panel)
 {
 	struct kingdisplay_panel *kingdisplay = to_kingdisplay_panel(panel);
-	int err;
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = kingdisplay->link };
 
-	err = mipi_dsi_dcs_set_display_off(kingdisplay->link);
-	if (err < 0)
-		dev_err(panel->dev, "failed to set display off: %d\n", err);
+	mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
 
-	return 0;
+	return dsi_ctx.accum_err;
 }
 
 static int kingdisplay_panel_unprepare(struct drm_panel *panel)
 {
 	struct kingdisplay_panel *kingdisplay = to_kingdisplay_panel(panel);
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = kingdisplay->link };
 	int err;
 
-	err = mipi_dsi_dcs_enter_sleep_mode(kingdisplay->link);
-	if (err < 0) {
-		dev_err(panel->dev, "failed to enter sleep mode: %d\n", err);
-		return err;
-	}
-
-	/* T15: 120ms */
-	msleep(120);
+	mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
+	mipi_dsi_msleep(&dsi_ctx, 120);
 
 	gpiod_set_value_cansleep(kingdisplay->enable_gpio, 0);
 
@@ -209,12 +202,13 @@ static int kingdisplay_panel_unprepare(struct drm_panel *panel)
 	if (err < 0)
 		return err;
 
-	return 0;
+	return dsi_ctx.accum_err;
 }
 
 static int kingdisplay_panel_prepare(struct drm_panel *panel)
 {
 	struct kingdisplay_panel *kingdisplay = to_kingdisplay_panel(panel);
+	struct mipi_dsi_multi_context dsi_ctx = { .dsi = kingdisplay->link };
 	int err, regulator_err;
 	unsigned int i;
 
@@ -232,32 +226,18 @@ static int kingdisplay_panel_prepare(struct drm_panel *panel)
 	/* T4: 15ms */
 	usleep_range(15000, 16000);
 
-	for (i = 0; i < ARRAY_SIZE(init_code); i++) {
-		err = mipi_dsi_generic_write(kingdisplay->link, &init_code[i],
-					sizeof(struct kingdisplay_panel_cmd));
-		if (err < 0) {
-			dev_err(panel->dev, "failed write init cmds: %d\n", err);
-			goto poweroff;
-		}
-	}
+	for (i = 0; i < ARRAY_SIZE(init_code); i++)
+		mipi_dsi_generic_write_multi(&dsi_ctx, &init_code[i],
+					     sizeof(struct kingdisplay_panel_cmd));
 
-	err = mipi_dsi_dcs_exit_sleep_mode(kingdisplay->link);
-	if (err < 0) {
-		dev_err(panel->dev, "failed to exit sleep mode: %d\n", err);
-		goto poweroff;
-	}
+	mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
+	mipi_dsi_msleep(&dsi_ctx, 120);
 
-	/* T6: 120ms */
-	msleep(120);
+	mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
+	mipi_dsi_usleep_range(&dsi_ctx, 10000, 11000);
 
-	err = mipi_dsi_dcs_set_display_on(kingdisplay->link);
-	if (err < 0) {
-		dev_err(panel->dev, "failed to set display on: %d\n", err);
+	if (dsi_ctx.accum_err)
 		goto poweroff;
-	}
-
-	/* T7: 10ms */
-	usleep_range(10000, 11000);
 
 	return 0;
 
@@ -268,7 +248,7 @@ static int kingdisplay_panel_prepare(struct drm_panel *panel)
 	if (regulator_err)
 		dev_err(panel->dev, "failed to disable regulator: %d\n", regulator_err);
 
-	return err;
+	return dsi_ctx.accum_err;
 }
 
 static const struct drm_display_mode default_mode = {
-- 
2.34.1