On 4/17/26 08:55, David Heidelberg via B4 Relay wrote:
From: Guido Günther <[email protected]>
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: 9e15123eca79 ("drm/msm/dsi: Stop unconditionally powering up DSI hosts at
modeset")
Signed-off-by: Guido Günther <[email protected]>
Signed-off-by: David Heidelberg <[email protected]>
---
Changes in v2:
- Move the prepare_prev_first before drm_panel_add(). (Douglas)
- Link to v1:
https://lore.kernel.org/r/[email protected]
---
drivers/gpu/drm/panel/panel-visionox-rm69299.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/panel/panel-visionox-rm69299.c
b/drivers/gpu/drm/panel/panel-visionox-rm69299.c
index e5e688cf98fdc..f1430370ff942 100644
--- a/drivers/gpu/drm/panel/panel-visionox-rm69299.c
+++ b/drivers/gpu/drm/panel/panel-visionox-rm69299.c
@@ -371,16 +371,18 @@ static int visionox_rm69299_probe(struct mipi_dsi_device
*dsi)
return ret;
ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(ctx->reset_gpio)) {
dev_err(dev, "cannot get reset gpio %ld\n",
PTR_ERR(ctx->reset_gpio));
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),
"Failed to create backlight\n");
drm_panel_add(&ctx->panel);
dsi->lanes = 4;
---
base-commit: e6efabc0afca02efa263aba533f35d90117ab283
change-id: 20260415-axolotl-display-715ce416e5c8
Best regards,
Reviewed-by: Neil Armstrong <[email protected]>
Thanks,
Neil
