Support optional feature: bypass GPIO.
Get GPIO status in irq handler. If GPIO is active, mode_fixup would be bypassed.
Signed-off-by: Hsin-Yi Wang hsinyi@chromium.org --- drivers/gpu/drm/bridge/analogix-anx7688.c | 57 +++++++++++++++++++++++ 1 file changed, 57 insertions(+)
diff --git a/drivers/gpu/drm/bridge/analogix-anx7688.c b/drivers/gpu/drm/bridge/analogix-anx7688.c index 5a3a2251c1c5..1d09db2cf8e9 100644 --- a/drivers/gpu/drm/bridge/analogix-anx7688.c +++ b/drivers/gpu/drm/bridge/analogix-anx7688.c @@ -5,11 +5,16 @@ * Copyright 2016 Google LLC */
+#include <linux/gpio.h> #include <linux/i2c.h> +#include <linux/interrupt.h> #include <linux/module.h> +#include <linux/of_gpio.h> #include <linux/regmap.h> #include <drm/drm_bridge.h> #include <drm/drm_crtc.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_probe_helper.h>
/* Register addresses */ #define VENDOR_ID_REG 0x00 @@ -31,6 +36,9 @@ struct anx7688 { struct i2c_client *client; struct regmap *regmap;
+ struct gpio_desc *gpiod_bypass; + int bypass; + bool filter; };
@@ -49,6 +57,10 @@ static bool anx7688_bridge_mode_fixup(struct drm_bridge *bridge, int totalbw, requiredbw; int ret;
+ /* bypass anx mode fixup */ + if (anx7688->bypass) + return true; + if (!anx7688->filter) return true;
@@ -93,6 +105,19 @@ static const struct drm_bridge_funcs anx7688_bridge_funcs = { .mode_fixup = anx7688_bridge_mode_fixup, };
+static irqreturn_t gpio_display_mux_det_threaded_handler(int unused, void *data) +{ + struct anx7688 *anx7688 = data; + + anx7688->bypass = gpiod_get_value(anx7688->gpiod_bypass); + dev_dbg(&anx7688->client->dev, "Interrupt %d!\n", anx7688->bypass); + + if (anx7688->bridge.dev) + drm_kms_helper_hotplug_event(anx7688->bridge.dev); + + return IRQ_HANDLED; +} + static const struct regmap_config anx7688_regmap_config = { .reg_bits = 8, .val_bits = 8, @@ -156,6 +181,38 @@ static int anx7688_i2c_probe(struct i2c_client *client, buffer[0], buffer[1]); }
+ /* Optional bypass-gpios */ + anx7688->gpiod_bypass = devm_gpiod_get_optional(dev, "bypass", + GPIOD_IN); + if (IS_ERR(anx7688->gpiod_bypass)) { + ret = PTR_ERR(anx7688->gpiod_bypass); + if (ret != -EPROBE_DEFER) + dev_err(dev, "bypass-gpios assigned failed\n"); + return ret; + } + if (anx7688->gpiod_bypass) { + int irq; + + irq = gpiod_to_irq(anx7688->gpiod_bypass); + if (irq < 0) { + dev_err(dev, "Failed to get output irq %d\n", irq); + return -ENODEV; + } + + anx7688->bypass = gpiod_get_value(anx7688->gpiod_bypass); + + ret = devm_request_threaded_irq(dev, irq, NULL, + gpio_display_mux_det_threaded_handler, + IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | + IRQF_ONESHOT, + "gpio-display-mux-det", anx7688); + if (ret) { + dev_err(dev, + "Failed to request MUX_DET threaded irq\n"); + return ret; + } + } + anx7688->bridge.funcs = &anx7688_bridge_funcs; drm_bridge_add(&anx7688->bridge);