From e9d50e9e7051a67783d75cd57ce360818b07d37b Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Thu, 30 Jan 2014 18:37:08 -0300 Subject: [media] adv7604: Support hot-plug detect control through a GPIO Add support for optional GPIO-controlled HPD pins in addition to the ADV7604-specific hotplug notifier. Signed-off-by: Laurent Pinchart Reviewed-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/i2c/adv7604.c | 37 +++++++++++++++++++++++++++++++++---- 1 file changed, 33 insertions(+), 4 deletions(-) (limited to 'drivers/media') diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c index 9ebe44c861c9..b14dc7d4b7bb 100644 --- a/drivers/media/i2c/adv7604.c +++ b/drivers/media/i2c/adv7604.c @@ -28,6 +28,7 @@ */ #include +#include #include #include #include @@ -135,6 +136,8 @@ struct adv7604_state { const struct adv7604_chip_info *info; struct adv7604_platform_data pdata; + struct gpio_desc *hpd_gpio[4]; + struct v4l2_subdev sd; struct media_pad pads[ADV7604_PAD_MAX]; unsigned int source_pad; @@ -598,6 +601,20 @@ static inline int edid_write_block(struct v4l2_subdev *sd, return err; } +static void adv7604_set_hpd(struct adv7604_state *state, unsigned int hpd) +{ + unsigned int i; + + for (i = 0; i < state->info->num_dv_ports; ++i) { + if (IS_ERR(state->hpd_gpio[i])) + continue; + + gpiod_set_value_cansleep(state->hpd_gpio[i], hpd & BIT(i)); + } + + v4l2_subdev_notify(&state->sd, ADV7604_HOTPLUG, &hpd); +} + static void adv7604_delayed_work_enable_hotplug(struct work_struct *work) { struct delayed_work *dwork = to_delayed_work(work); @@ -607,7 +624,7 @@ static void adv7604_delayed_work_enable_hotplug(struct work_struct *work) v4l2_dbg(2, debug, sd, "%s: enable hotplug\n", __func__); - v4l2_subdev_notify(sd, ADV7604_HOTPLUG, (void *)&state->edid.present); + adv7604_set_hpd(state, state->edid.present); } static inline int hdmi_read(struct v4l2_subdev *sd, u8 reg) @@ -2047,7 +2064,6 @@ static int adv7604_set_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid) struct adv7604_state *state = to_state(sd); const struct adv7604_chip_info *info = state->info; int spa_loc; - int tmp = 0; int err; int i; @@ -2058,7 +2074,7 @@ static int adv7604_set_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid) if (edid->blocks == 0) { /* Disable hotplug and I2C access to EDID RAM from DDC port */ state->edid.present &= ~(1 << edid->pad); - v4l2_subdev_notify(sd, ADV7604_HOTPLUG, (void *)&state->edid.present); + adv7604_set_hpd(state, state->edid.present); rep_write_clr_set(sd, info->edid_enable_reg, 0x0f, state->edid.present); /* Fall back to a 16:9 aspect ratio */ @@ -2082,7 +2098,7 @@ static int adv7604_set_edid(struct v4l2_subdev *sd, struct v4l2_edid *edid) /* Disable hotplug and I2C access to EDID RAM from DDC port */ cancel_delayed_work_sync(&state->delayed_work_enable_hotplug); - v4l2_subdev_notify(sd, ADV7604_HOTPLUG, (void *)&tmp); + adv7604_set_hpd(state, 0); rep_write_clr_set(sd, info->edid_enable_reg, 0x0f, 0x00); spa_loc = get_edid_spa_location(edid->edid); @@ -2678,6 +2694,19 @@ static int adv7604_probe(struct i2c_client *client, return -ENODEV; } state->pdata = *pdata; + + /* Request GPIOs. */ + for (i = 0; i < state->info->num_dv_ports; ++i) { + state->hpd_gpio[i] = + devm_gpiod_get_index(&client->dev, "hpd", i); + if (IS_ERR(state->hpd_gpio[i])) + continue; + + gpiod_set_value_cansleep(state->hpd_gpio[i], 0); + + v4l_info(client, "Handling HPD %u GPIO\n", i); + } + state->timings = cea640x480; state->format = adv7604_format_info(state, V4L2_MBUS_FMT_YUYV8_2X8); -- cgit v1.2.3