linux-kernel - Re: [PATCH v2 2/2] drm: panel: add Khadas TS050 panel driver

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Message-ID: <c98d17f1-a164-94bf-5fa3-da36e7b6f8c3@baylibre.com>
Date:   Mon, 7 Dec 2020 14:49:55 +0100
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Sam Ravnborg <sam@...nborg.org>
Cc:     linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH v2 2/2] drm: panel: add Khadas TS050 panel driver

Hi,

On 05/12/2020 20:15, Sam Ravnborg wrote:
> Hi Neil,
> 
>> +
>> +static int khadas_ts050_panel_probe(struct mipi_dsi_device *dsi)
>> +{
>> +	struct khadas_ts050_panel *khadas_ts050;
>> +	int err;
>> +
>> +	dsi->lanes = 4;
>> +	dsi->format = MIPI_DSI_FMT_RGB888;
>> +	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
>> +			  MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_EOT_PACKET;
>> +
>> +	khadas_ts050 = devm_kzalloc(&dsi->dev, sizeof(*khadas_ts050),
>> +				    GFP_KERNEL);
>> +	if (!khadas_ts050)
>> +		return -ENOMEM;
>> +
>> +	mipi_dsi_set_drvdata(dsi, khadas_ts050);
>> +	khadas_ts050->link = dsi;
>> +
>> +	err = khadas_ts050_panel_add(khadas_ts050);
>> +	if (err < 0)
>> +		return err;
>> +
>> +	return mipi_dsi_attach(dsi);
>> +}
> 
> If mipi_dsi_attach() failes then da a drm_panel_remove() like this:
> 
> 	ret = mipi_dsi_attach(dsi);
> 	if (ret)
> 		drm_panel_remove(&khadas_ts050->base);
> 
> 	return ret;
> 
> This is again something several panels gets wrong.
> 
> With this fixed:
> Reviewed-by: Sam Ravnborg <sam@...nborg.org>
> 
> I assume you will fix it while applying.

Sure, thanks !

Neil

> 
> 	Sam
>