On 26.07.2018 06:36, Stefan Agner wrote:
> If the GPIO subsystem is not ready make sure to return -EPROBE_DEFER
> instead of silently continuing without HPD.
>
> Reported-by: Marcel Ziswiler <marcel.ziswiler@xxxxxxxxxxx>
> Signed-off-by: Stefan Agner <stefan@xxxxxxxx>
I think this did not get merged yet, any chance to get it in?
--
Stefan
> ---
> drivers/gpu/drm/tegra/output.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/tegra/output.c b/drivers/gpu/drm/tegra/output.c
> index ffe34bd0bb9d..4bcefe455afd 100644
> --- a/drivers/gpu/drm/tegra/output.c
> +++ b/drivers/gpu/drm/tegra/output.c
> @@ -133,7 +133,9 @@ int tegra_output_probe(struct tegra_output *output)
> output->hpd_gpio = of_get_named_gpio_flags(output->of_node,
> "nvidia,hpd-gpio", 0,
> &output->hpd_gpio_flags);
> - if (gpio_is_valid(output->hpd_gpio)) {
> + if (output->hpd_gpio == -EPROBE_DEFER) {
> + return -EPROBE_DEFER;
> + } else if (gpio_is_valid(output->hpd_gpio)) {
> unsigned long flags;
>
> err = gpio_request_one(output->hpd_gpio, GPIOF_DIR_IN,
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