87 lines
2.3 KiB
Diff
87 lines
2.3 KiB
Diff
From: Ondrej Jirman <megous@megous.com>
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Date: Sun, 26 Jan 2020 00:28:10 +0100
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Subject: [PATCH 094/194] media: ov5640: Don't powerup the sensor during
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driver probe
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It causes autofocus clicking during boot on some devices, and
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it's enough to do it when turning on the sensor power by media
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pipeline via s_power callback, later on.
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Signed-off-by: Ondrej Jirman <megous@megous.com>
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---
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drivers/media/i2c/ov5640.c | 40 ++++++++--------------------------------
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1 file changed, 8 insertions(+), 32 deletions(-)
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diff --git a/drivers/media/i2c/ov5640.c b/drivers/media/i2c/ov5640.c
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index 8a53c0c..75f71e6 100644
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--- a/drivers/media/i2c/ov5640.c
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+++ b/drivers/media/i2c/ov5640.c
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@@ -1932,6 +1932,7 @@ static void ov5640_reset(struct ov5640_dev *sensor)
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static int ov5640_set_power_on(struct ov5640_dev *sensor)
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{
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struct i2c_client *client = sensor->i2c_client;
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+ u16 chip_id;
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int ret;
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ret = clk_prepare_enable(sensor->xclk);
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@@ -1956,6 +1957,13 @@ static int ov5640_set_power_on(struct ov5640_dev *sensor)
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if (ret)
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goto power_off;
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+ ret = ov5640_read_reg16(sensor, OV5640_REG_CHIP_ID, &chip_id);
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+ if (ret) {
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+ dev_err(&client->dev, "%s: failed to read chip identifier\n",
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+ __func__);
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+ goto power_off;
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+ }
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+
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return 0;
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power_off:
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@@ -3039,34 +3047,6 @@ static int ov5640_get_regulators(struct ov5640_dev *sensor)
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sensor->supplies);
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}
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-static int ov5640_check_chip_id(struct ov5640_dev *sensor)
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-{
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- struct i2c_client *client = sensor->i2c_client;
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- int ret = 0;
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- u16 chip_id;
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-
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- ret = ov5640_set_power_on(sensor);
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- if (ret)
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- return ret;
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-
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- ret = ov5640_read_reg16(sensor, OV5640_REG_CHIP_ID, &chip_id);
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- if (ret) {
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- dev_err(&client->dev, "%s: failed to read chip identifier\n",
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- __func__);
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- goto power_off;
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- }
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-
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- if (chip_id != 0x5640) {
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- dev_err(&client->dev, "%s: wrong chip identifier, expected 0x5640, got 0x%x\n",
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- __func__, chip_id);
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- ret = -ENXIO;
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- }
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-
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-power_off:
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- ov5640_set_power_off(sensor);
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- return ret;
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-}
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-
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static int ov5640_probe(struct i2c_client *client)
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{
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struct device *dev = &client->dev;
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@@ -3184,10 +3164,6 @@ static int ov5640_probe(struct i2c_client *client)
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mutex_init(&sensor->lock);
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- ret = ov5640_check_chip_id(sensor);
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- if (ret)
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- goto entity_cleanup;
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-
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ret = ov5640_init_controls(sensor);
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if (ret)
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goto entity_cleanup;
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