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89 lines
2.6 KiB
Diff
89 lines
2.6 KiB
Diff
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From 9524eae5a46285e574b869879fb0228fb4424a5f Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Thu, 1 Dec 2022 13:54:49 +0000
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Subject: [PATCH] media: i2c: ov7251: Add module param to select ext
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trig mode
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As there isn't currently a defined mechanism for selecting an
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external trigger mode on image sensors, copy the imx477
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approach of using a module parameter to enable ext trig.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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drivers/media/i2c/ov7251.c | 35 ++++++++++++++++++++++++++++++++---
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1 file changed, 32 insertions(+), 3 deletions(-)
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--- a/drivers/media/i2c/ov7251.c
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+++ b/drivers/media/i2c/ov7251.c
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@@ -23,6 +23,10 @@
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#include <media/v4l2-fwnode.h>
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#include <media/v4l2-subdev.h>
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+static int trigger_mode;
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+module_param(trigger_mode, int, 0644);
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+MODULE_PARM_DESC(trigger_mode, "Set vsync trigger mode: 0=standalone, (1=source - not implemented), 2=sink");
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+
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#define OV7251_SC_MODE_SELECT 0x0100
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#define OV7251_SC_MODE_SELECT_SW_STANDBY 0x0
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#define OV7251_SC_MODE_SELECT_STREAMING 0x1
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@@ -525,7 +529,6 @@ static const struct reg_value ov7251_set
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{ 0x3662, 0x01 },
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{ 0x3663, 0x70 },
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{ 0x3664, 0x50 },
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- { 0x3666, 0x0a },
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{ 0x3669, 0x1a },
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{ 0x366a, 0x00 },
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{ 0x366b, 0x50 },
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@@ -592,9 +595,8 @@ static const struct reg_value ov7251_set
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{ 0x3c00, 0x89 },
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{ 0x3c01, 0x63 },
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{ 0x3c02, 0x01 },
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- { 0x3c03, 0x00 },
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{ 0x3c04, 0x00 },
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- { 0x3c05, 0x03 },
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+ { 0x3c05, 0x01 },
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{ 0x3c06, 0x00 },
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{ 0x3c07, 0x06 },
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{ 0x3c0c, 0x01 },
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@@ -624,6 +626,16 @@ static const struct reg_value ov7251_set
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{ 0x5001, 0x80 },
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};
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+static const struct reg_value ov7251_ext_trig_on[] = {
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+ { 0x3666, 0x00 },
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+ { 0x3c03, 0x17 },
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+};
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+
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+static const struct reg_value ov7251_ext_trig_off[] = {
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+ { 0x3666, 0x0a },
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+ { 0x3c03, 0x00 },
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+};
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+
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static const unsigned long supported_xclk_rates[] = {
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[OV7251_19_2_MHZ] = 19200000,
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[OV7251_24_MHZ] = 24000000,
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@@ -1372,6 +1384,23 @@ static int ov7251_s_stream(struct v4l2_s
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dev_err(ov7251->dev, "could not sync v4l2 controls\n");
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goto err_power_down;
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}
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+
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+ /* Set vsync trigger mode */
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+ switch (trigger_mode) {
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+ case 2:
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+ ov7251_set_register_array(ov7251,
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+ ov7251_ext_trig_on,
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+ ARRAY_SIZE(ov7251_ext_trig_on));
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+ break;
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+ case 0:
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+ default:
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+ /* case 1 for ext trig source currently not implemented */
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+ ov7251_set_register_array(ov7251,
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+ ov7251_ext_trig_off,
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+ ARRAY_SIZE(ov7251_ext_trig_off));
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+ break;
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+ }
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+
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ret = ov7251_write_reg(ov7251, OV7251_SC_MODE_SELECT,
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OV7251_SC_MODE_SELECT_STREAMING);
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if (ret)
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