Am Freitag, dem 23.06.2023 um 18:08 +0800 schrieb Sui Jingfeng:
> From: Sui Jingfeng <suijingf...@loongson.cn>
>
> This make the code in etnaviv_pdev_probe() less twisted, drop the reference
> to device node after finished. Also kill a double blank line.
>
I can't spot the double blank line you claim to remove.
> Signed-off-by: Sui Jingfeng <suijingf...@loongson.cn>
> ---
> drivers/gpu/drm/etnaviv/etnaviv_drv.c | 32 ++++++++++++++++++---------
> 1 file changed, 22 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.c
> b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
> index 7d0eeab3e8b7..3446f8eabf59 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_drv.c
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
> @@ -27,6 +27,19 @@
> * DRM operations:
> */
>
> +/* If the DT contains at least one available GPU, return a pointer to it */
> +
I think the code in the function is simple enough that we don't need a
comment explaining what it does.
Regards,
Lucas
> +static struct device_node *etnaviv_of_first_node(void)
> +{
> + struct device_node *np;
> +
> + for_each_compatible_node(np, NULL, "vivante,gc") {
> + if (of_device_is_available(np))
> + return np;
> + }
> +
> + return NULL;
> +}
>
> static void load_gpu(struct drm_device *dev)
> {
> @@ -587,7 +600,7 @@ static const struct component_master_ops
> etnaviv_master_ops = {
> static int etnaviv_pdev_probe(struct platform_device *pdev)
> {
> struct device *dev = &pdev->dev;
> - struct device_node *first_node = NULL;
> + struct device_node *first_node;
> struct component_match *match = NULL;
>
> if (!dev->platform_data) {
> @@ -597,11 +610,10 @@ static int etnaviv_pdev_probe(struct platform_device
> *pdev)
> if (!of_device_is_available(core_node))
> continue;
>
> - if (!first_node)
> - first_node = core_node;
> -
> drm_of_component_match_add(&pdev->dev, &match,
> component_compare_of,
> core_node);
> +
> + of_node_put(core_node);
> }
> } else {
> char **names = dev->platform_data;
> @@ -634,8 +646,11 @@ static int etnaviv_pdev_probe(struct platform_device
> *pdev)
> * device as the GPU we found. This assumes that all Vivante
> * GPUs in the system share the same DMA constraints.
> */
> - if (first_node)
> + first_node = etnaviv_of_first_node();
> + if (first_node) {
> of_dma_configure(&pdev->dev, first_node, true);
> + of_node_put(first_node);
> + }
>
> return component_master_add_with_match(dev, &etnaviv_master_ops, match);
> }
> @@ -709,17 +724,14 @@ static int __init etnaviv_init(void)
> * If the DT contains at least one available GPU device, instantiate
> * the DRM platform device.
> */
> - for_each_compatible_node(np, NULL, "vivante,gc") {
> - if (!of_device_is_available(np))
> - continue;
> + np = etnaviv_of_first_node();
> + if (np) {
> of_node_put(np);
>
> ret = etnaviv_create_platform_device("etnaviv",
> &etnaviv_platform_device);
> if (ret)
> goto unregister_platform_driver;
> -
> - break;
> }
>
> return 0;
