Re: [PATCH] drm/exynos: Don't fail if no TE-gpio is defined for DSI driver

[Inki Dae <inki.dae@xxxxxxxxxxx>]

Hi Marek,

Thanks for fixing it.
Inki Dae.

22. 1. 21. 19:00에 Marek Szyprowski 이(가) 쓴 글:
> TE-gpio is optional and if it is not found then gpiod_get_optional()
> returns NULL. In such case the code will continue and try to convert NULL
> gpiod to irq what in turn fails. The failure is then propagated and driver
> is not registered.
> 
> Fix this by returning early from exynos_dsi_register_te_irq() if no
> TE-gpio is found.
> 
> Fixes: ee6c8b5afa62 ("drm/exynos: Replace legacy gpio interface for gpiod interface")
> Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> ---
>  drivers/gpu/drm/exynos/exynos_drm_dsi.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
> index 32a36572b894..14ebbb124852 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
> @@ -1335,7 +1335,9 @@ static int exynos_dsi_register_te_irq(struct exynos_dsi *dsi,
>  	int te_gpio_irq;
>  
>  	dsi->te_gpio = devm_gpiod_get_optional(dsi->dev, "te", GPIOD_IN);
> -	if (IS_ERR(dsi->te_gpio)) {
> +	if (!dsi->te_gpio) {
> +		return 0;
> +	} else if (IS_ERR(dsi->te_gpio)) {
>  		dev_err(dsi->dev, "gpio request failed with %ld\n",
>  				PTR_ERR(dsi->te_gpio));
>  		return PTR_ERR(dsi->te_gpio);