diff options
| author | Thierry Reding <treding@nvidia.com> | 2015-04-27 15:12:39 +0200 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2015-08-13 13:47:40 +0200 |
| commit | fb36d0eed4fe3359aca8e6000c1bd92cc5199718 (patch) | |
| tree | 0ff57c5b778de577b391b961b3fa9e446c21164e /drivers/gpu/drm/tegra | |
| parent | a13f1dc4c3b7ac7de9d9ac266c0ed0374cae3421 (diff) | |
| download | linux-fb36d0eed4fe3359aca8e6000c1bd92cc5199718.tar.bz2 | |
drm/tegra: output: Support low-active hotplug detect
Support low-active hotplug detect signals by storing the GPIO flags
parsed from device tree.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/gpu/drm/tegra')
| -rw-r--r-- | drivers/gpu/drm/tegra/drm.h | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/tegra/output.c | 20 |
2 files changed, 14 insertions, 8 deletions
diff --git a/drivers/gpu/drm/tegra/drm.h b/drivers/gpu/drm/tegra/drm.h index 659b2fcc986d..ee66049521c3 100644 --- a/drivers/gpu/drm/tegra/drm.h +++ b/drivers/gpu/drm/tegra/drm.h @@ -12,6 +12,7 @@ #include <uapi/drm/tegra_drm.h> #include <linux/host1x.h> +#include <linux/of_gpio.h> #include <drm/drmP.h> #include <drm/drm_crtc_helper.h> @@ -200,6 +201,7 @@ struct tegra_output { const struct edid *edid; unsigned int hpd_irq; int hpd_gpio; + enum of_gpio_flags hpd_gpio_flags; struct drm_encoder encoder; struct drm_connector connector; diff --git a/drivers/gpu/drm/tegra/output.c b/drivers/gpu/drm/tegra/output.c index 37db47975d48..46664b622270 100644 --- a/drivers/gpu/drm/tegra/output.c +++ b/drivers/gpu/drm/tegra/output.c @@ -7,8 +7,6 @@ * published by the Free Software Foundation. */ -#include <linux/of_gpio.h> - #include <drm/drm_atomic_helper.h> #include <drm/drm_panel.h> #include "drm.h" @@ -59,10 +57,17 @@ tegra_output_connector_detect(struct drm_connector *connector, bool force) enum drm_connector_status status = connector_status_unknown; if (gpio_is_valid(output->hpd_gpio)) { - if (gpio_get_value(output->hpd_gpio) == 0) - status = connector_status_disconnected; - else - status = connector_status_connected; + if (output->hpd_gpio_flags & OF_GPIO_ACTIVE_LOW) { + if (gpio_get_value(output->hpd_gpio) != 0) + status = connector_status_disconnected; + else + status = connector_status_connected; + } else { + if (gpio_get_value(output->hpd_gpio) == 0) + status = connector_status_disconnected; + else + status = connector_status_connected; + } } else { if (!output->panel) status = connector_status_disconnected; @@ -97,7 +102,6 @@ static irqreturn_t hpd_irq(int irq, void *data) int tegra_output_probe(struct tegra_output *output) { struct device_node *ddc, *panel; - enum of_gpio_flags flags; int err, size; if (!output->of_node) @@ -128,7 +132,7 @@ int tegra_output_probe(struct tegra_output *output) output->hpd_gpio = of_get_named_gpio_flags(output->of_node, "nvidia,hpd-gpio", 0, - &flags); + &output->hpd_gpio_flags); if (gpio_is_valid(output->hpd_gpio)) { unsigned long flags; |