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From 34c4ee6f5d7143f6c8be604715f9b52b7540e38d Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.org>
Date: Wed, 31 Oct 2018 15:00:04 +0000
Subject: [PATCH] media: adv7180: Nasty hack to allow input selection.
Whilst the adv7180 driver support s_routing, nothing else
does, and there is a missing lump of framework code to
define the mapping from connectors on a board to the inputs
they represent on the ADV7180.
Add a nasty hack to take a module parameter that is passed in
to s_routing on any call to G_STD, or S_STD (or subdev
g_input_status call).
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
---
drivers/media/i2c/adv7180.c | 30 ++++++++++++++++++++++++++++--
1 file changed, 28 insertions(+), 2 deletions(-)
--- a/drivers/media/i2c/adv7180.c
+++ b/drivers/media/i2c/adv7180.c
@@ -189,6 +189,10 @@
#define V4L2_CID_ADV_FAST_SWITCH (V4L2_CID_USER_ADV7180_BASE + 0x00)
+static int dbg_input;
+module_param(dbg_input, int, 0644);
+MODULE_PARM_DESC(dbg_input, "Input number (0-31)");
+
struct adv7180_state;
#define ADV7180_FLAG_RESET_POWERED BIT(0)
@@ -405,10 +409,24 @@ out:
return ret;
}
+static void adv7180_check_input(struct v4l2_subdev *sd)
+{
+ struct adv7180_state *state = to_state(sd);
+
+ if (state->input != dbg_input)
+ if (adv7180_s_routing(sd, dbg_input, 0, 0))
+ /* Failed - reset dbg_input */
+ dbg_input = state->input;
+}
+
static int adv7180_g_input_status(struct v4l2_subdev *sd, u32 *status)
{
struct adv7180_state *state = to_state(sd);
- int ret = mutex_lock_interruptible(&state->mutex);
+ int ret;
+
+ adv7180_check_input(sd);
+
+ ret = mutex_lock_interruptible(&state->mutex);
if (ret)
return ret;
@@ -434,7 +452,11 @@ static int adv7180_program_std(struct ad
static int adv7180_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
{
struct adv7180_state *state = to_state(sd);
- int ret = mutex_lock_interruptible(&state->mutex);
+ int ret;
+
+ adv7180_check_input(sd);
+
+ ret = mutex_lock_interruptible(&state->mutex);
if (ret)
return ret;
@@ -456,6 +478,8 @@ static int adv7180_g_std(struct v4l2_sub
{
struct adv7180_state *state = to_state(sd);
+ adv7180_check_input(sd);
+
*norm = state->curr_norm;
return 0;
@@ -810,6 +834,8 @@ static int adv7180_s_stream(struct v4l2_
return 0;
}
+ adv7180_check_input(sd);
+
/* Must wait until querystd released the lock */
ret = mutex_lock_interruptible(&state->mutex);
if (ret)
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