On 08/24/2016 04:25 AM, Milo Kim wrote: > This patch enables getting a HPD GPIO descriptor quickly. > The exynos-hdmi driver uses "hpd" for HDMI hot plug detection. > > static int hdmi_resources_init(struct hdmi_context *hdata) > { > ... > hdata->hpd_gpio = devm_gpiod_get(dev, "hpd", GPIOD_IN); > ... > } > > This calls 'of_find_gpio()' and it generates the GPIO consumer ID by referring > GPIO suffix. So 'hpd-gpios' is preferred on getting a GPIO descriptor. > > However, if the device tree uses 'hpd-gpio', then the exynos-hdmi driver > always retries to get a GPIO descriptor because the first GPIO suffix is not > 'gpio' but 'gpios'. So you always see the debug message below. > > of_get_named_gpiod_flags: can't parse 'hpd-gpios' property of node > '/soc/hdmi@14530000[0]' > > Use the preferred property, 'hpd-gpios' instead of 'hpd-gpio'. > > Acked-by: Rob Herring <r...@kernel.org> > Cc: Kukjin Kim <kg...@kernel.org> > Cc: Krzysztof Kozlowski <k.kozlow...@samsung.com> > Cc: David Airlie <airl...@linux.ie> > Cc: Inki Dae <inki....@samsung.com> > Cc: Joonyoung Shim <jy0922.s...@samsung.com> > Cc: Seung-Woo Kim <sw0312....@samsung.com> > Cc: Kyungmin Park <kyungmin.p...@samsung.com> > Cc: devicet...@vger.kernel.org > Cc: linux-arm-ker...@lists.infradead.org > Cc: linux-samsung-...@vger.kernel.org > Cc: linux-kernel@vger.kernel.org > Cc: dri-de...@lists.freedesktop.org > Signed-off-by: Milo Kim <woogyom....@gmail.com> I am not sure if this long Cc list is necessary. Anyway:
Reviewed-by: Andrzej Hajda <a.ha...@samsung.com> -- Regards Andrzej