Re: [PATCH v3 1/6] drm/panel: Use devm_mipi_dsi_attach in BOE panels

["Luca Ceresoli" <luca.ceresoli@bootlin.com>]

Hello,

On Wed Aug 12, 2026 at 3:26 PM CEST, Maxime Ripard wrote:
> On Wed, Aug 12, 2026 at 03:04:18PM +0200, Osama Abdelkader wrote:
>> Use the managed MIPI DSI attach helper in BOE panel drivers and drop the
>> corresponding manual detach calls from remove paths.
>>
>> Signed-off-by: Osama Abdelkader <osama.abdelkader@gmail.com>
>>
>> ---
>> v3:
>> - Move the changelog after the `---`.
>>
>> v2:
>> - break long description lines.
>> - add Signed-off-by tag
>>
>>  drivers/gpu/drm/panel/panel-boe-bf060y8m-aj0.c       | 8 +-------
>>  drivers/gpu/drm/panel/panel-boe-himax8279d.c         | 8 +-------
>>  drivers/gpu/drm/panel/panel-boe-td4320.c             | 8 +-------
>>  drivers/gpu/drm/panel/panel-boe-th101mb31ig002-28a.c | 4 +---
>>  drivers/gpu/drm/panel/panel-boe-tv101wum-ll2.c       | 8 +-------
>>  drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c       | 7 +------
>>  6 files changed, 6 insertions(+), 37 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/panel/panel-boe-bf060y8m-aj0.c b/drivers/gpu/drm/panel/panel-boe-bf060y8m-aj0.c
>> index 84c21c62a43e..6a74523a6614 100644
>> --- a/drivers/gpu/drm/panel/panel-boe-bf060y8m-aj0.c
>> +++ b/drivers/gpu/drm/panel/panel-boe-bf060y8m-aj0.c
>> @@ -359,7 +359,7 @@ static int boe_bf060y8m_aj0_probe(struct mipi_dsi_device *dsi)
>>
>>  	drm_panel_add(&boe->panel);
>>
>> -	ret = mipi_dsi_attach(dsi);
>> +	ret = devm_mipi_dsi_attach(&dsi->dev, dsi);
>>  	if (ret < 0) {
>>  		dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
>>  		return ret;
>> @@ -371,12 +371,6 @@ static int boe_bf060y8m_aj0_probe(struct mipi_dsi_device *dsi)
>>  static void boe_bf060y8m_aj0_remove(struct mipi_dsi_device *dsi)
>>  {
>>  	struct boe_bf060y8m_aj0 *boe = mipi_dsi_get_drvdata(dsi);
>> -	int ret;
>> -
>> -	ret = mipi_dsi_detach(dsi);
>> -	if (ret < 0)
>> -		dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
>> -
>>  	drm_panel_remove(&boe->panel);
>>  }
>
> mipi_dsi_detach is now called after drm_panel_remove. Your commit log
> should mention it, and explain why it's not a concern.

Indeed. Or switch from drm_panel_add() to devm_drm_panel_add(), which would
avoid the issue mentioned by Maxime and cleanup even more the code.

Luca

--
Luca Ceresoli, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com