drm/panel: visionox-rm69299: Make use of prepare_prev_first

agx · dianders · commit 4a92ef0c57df · 2026-04-17T07:08:29.000-07:00
The DSI link must be powered up to let panel driver to talk to the panel during prepare() callback execution. Set the prepare_prev_first flag to guarantee this. Fixes: 9e15123 ("drm/msm/dsi: Stop unconditionally powering up DSI hosts at modeset") Signed-off-by: Guido Günther <agx@sigxcpu.org> Signed-off-by: David Heidelberg <david@ixit.cz> Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Douglas Anderson <dianders@chromium.org> Link: https://patch.msgid.link/20260417-axolotl-display-v2-1-8ce5341e46c2@ixit.cz
diff --git a/drivers/gpu/drm/panel/panel-visionox-rm69299.c b/drivers/gpu/drm/panel/panel-visionox-rm69299.c
@@ -376,6 +376,8 @@ static int visionox_rm69299_probe(struct mipi_dsi_device *dsi)
 		return PTR_ERR(ctx->reset_gpio);
 	}
 
+	ctx->panel.prepare_prev_first = true;
+
 	ctx->panel.backlight = visionox_rm69299_create_backlight(ctx);
 	if (IS_ERR(ctx->panel.backlight))
 		return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),

Original file line number	Diff line number	Diff line change
`@@ -376,6 +376,8 @@ static int visionox_rm69299_probe(struct mipi_dsi_device *dsi)`
`376`	`376`	`return PTR_ERR(ctx->reset_gpio);`
`377`	`377`	`}`
`378`	`378`
	`379`	`+ ctx->panel.prepare_prev_first = true;`
	`380`	`+`
`379`	`381`	`ctx->panel.backlight = visionox_rm69299_create_backlight(ctx);`
`380`	`382`	`if (IS_ERR(ctx->panel.backlight))`
`381`	`383`	`return dev_err_probe(dev, PTR_ERR(ctx->panel.backlight),`