On 08/16/2024, Krzysztof Kozlowski wrote:
> On 16/08/2024 10:09, Liu Ying wrote:
>> NXP i.MX93 mediamix blk-ctrl contains one DISPLAY_MUX register which
>> configures parallel display format by using the "PARALLEL_DISP_FORMAT"
>> field. Add a DRM bridge driver to support the display format configuration.
>>
>> Signed-off-by: Liu Ying <[email protected]>
>> ---
>
> ...
>
>> +
>> +static int imx93_pdfc_bridge_probe(struct platform_device *pdev)
>> +{
>> + struct device *dev = &pdev->dev;
>> + struct imx93_pdfc *pdfc;
>> + int ret;
>> +
>> + pdfc = devm_kzalloc(dev, sizeof(*pdfc), GFP_KERNEL);
>> + if (!pdfc)
>> + return -ENOMEM;
>> +
>> + pdfc->regmap = syscon_node_to_regmap(dev->of_node->parent);
>> + if (IS_ERR(pdfc->regmap)) {
>> + ret = PTR_ERR(pdfc->regmap);
>> + if (ret != -EPROBE_DEFER)
>> + DRM_DEV_ERROR(dev, "failed to get regmap: %d\n", ret);
>> + return ret;
>
> Nope, you just open-coded dev_err_probe. Syntax is - return
> dev_err_probe(). if you need wrapper for DRM, add such.
Will use dev_err_probe().
>
>> + }
>> +
>> + pdfc->next_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 1, 0);
>> + if (IS_ERR(pdfc->next_bridge)) {
>> + ret = PTR_ERR(pdfc->next_bridge);
>> + if (ret != -EPROBE_DEFER)
>> + DRM_DEV_ERROR(dev, "failed to get next bridge: %d\n",
>> ret);
>> + return ret;
>
> Ditto
Will use dev_err_probe().
>
>
>> + }
>> +
>
> ...
>
>> +MODULE_DESCRIPTION("NXP i.MX93 parallel display format configuration
>> driver");
>> +MODULE_AUTHOR("Liu Ying <[email protected]>");
>> +MODULE_LICENSE("GPL v2");
>> +MODULE_ALIAS("platform:" DRIVER_NAME);
>
> Which other driver needs this platform alias?
Quote include/linux/module.h:
"
/* For userspace: you can also call me... */
#define MODULE_ALIAS(_alias) MODULE_INFO(alias, _alias)
"
Anything wrong with using MODULE_ALIAS() here?
>
> Best regards,
> Krzysztof
>
--
Regards,
Liu Ying
