011f2c26f1
As usual these patches were extracted and rebased from the raspberry pi repo: https://github.com/raspberrypi/linux/tree/rpi-4.4.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
57 lines
1.9 KiB
Diff
57 lines
1.9 KiB
Diff
From 874ea6861ec0a21d463a03ed32288c9eedb06a7f Mon Sep 17 00:00:00 2001
|
|
From: Eric Anholt <eric@anholt.net>
|
|
Date: Mon, 29 Feb 2016 17:53:01 -0800
|
|
Subject: [PATCH] drm/vc4: Respect GPIO_ACTIVE_LOW on HDMI HPD if set in the
|
|
devicetree.
|
|
|
|
The original Raspberry Pi had the GPIO active high, but the later
|
|
models are active low. The DT GPIO bindings allow specifying the
|
|
active flag, except that it doesn't get propagated to the gpiodesc, so
|
|
you have to handle it yourself.
|
|
|
|
Signed-off-by: Eric Anholt <eric@anholt.net>
|
|
Tested-by: Daniel Stone <daniels@collabora.com>
|
|
(cherry picked from commit 0b06e0a7945130e6a187f7959529cba7725f573a)
|
|
---
|
|
drivers/gpu/drm/vc4/vc4_hdmi.c | 12 ++++++++++--
|
|
1 file changed, 10 insertions(+), 2 deletions(-)
|
|
|
|
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
|
|
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
|
|
@@ -47,6 +47,7 @@ struct vc4_hdmi {
|
|
void __iomem *hdmicore_regs;
|
|
void __iomem *hd_regs;
|
|
int hpd_gpio;
|
|
+ bool hpd_active_low;
|
|
|
|
struct clk *pixel_clock;
|
|
struct clk *hsm_clock;
|
|
@@ -168,7 +169,8 @@ vc4_hdmi_connector_detect(struct drm_con
|
|
return connector_status_connected;
|
|
|
|
if (vc4->hdmi->hpd_gpio) {
|
|
- if (gpio_get_value_cansleep(vc4->hdmi->hpd_gpio))
|
|
+ if (gpio_get_value_cansleep(vc4->hdmi->hpd_gpio) ^
|
|
+ vc4->hdmi->hpd_active_low)
|
|
return connector_status_connected;
|
|
else
|
|
return connector_status_disconnected;
|
|
@@ -519,11 +521,17 @@ static int vc4_hdmi_bind(struct device *
|
|
* we'll use the HDMI core's register.
|
|
*/
|
|
if (of_find_property(dev->of_node, "hpd-gpios", &value)) {
|
|
- hdmi->hpd_gpio = of_get_named_gpio(dev->of_node, "hpd-gpios", 0);
|
|
+ enum of_gpio_flags hpd_gpio_flags;
|
|
+
|
|
+ hdmi->hpd_gpio = of_get_named_gpio_flags(dev->of_node,
|
|
+ "hpd-gpios", 0,
|
|
+ &hpd_gpio_flags);
|
|
if (hdmi->hpd_gpio < 0) {
|
|
ret = hdmi->hpd_gpio;
|
|
goto err_unprepare_hsm;
|
|
}
|
|
+
|
|
+ hdmi->hpd_active_low = hpd_gpio_flags & OF_GPIO_ACTIVE_LOW;
|
|
}
|
|
|
|
vc4->hdmi = hdmi;
|