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media: i2c: ov7251: Add module param to select ext trig mode

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As there isn't currently a defined mechanism for selecting an
external trigger mode on image sensors, copy the imx477
approach of using a module parameter to enable ext trig.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
This commit is contained in:
Dave Stevenson
2022-12-01 13:54:49 +00:00
committed by Dom Cobley
parent feee74e75b
commit 8f437cb613
1 changed files with 32 additions and 3 deletions
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35
drivers/media/i2c/ov7251.c
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@@ -23,6 +23,10 @@
#include <media/v4l2-fwnode.h> #include <media/v4l2-fwnode.h>
#include <media/v4l2-subdev.h> #include <media/v4l2-subdev.h>
static int trigger_mode;
module_param(trigger_mode, int, 0644);
MODULE_PARM_DESC(trigger_mode, "Set vsync trigger mode: 0=standalone, (1=source - not implemented), 2=sink");
#define OV7251_SC_MODE_SELECT 0x0100 #define OV7251_SC_MODE_SELECT 0x0100
#define OV7251_SC_MODE_SELECT_SW_STANDBY 0x0 #define OV7251_SC_MODE_SELECT_SW_STANDBY 0x0
#define OV7251_SC_MODE_SELECT_STREAMING 0x1 #define OV7251_SC_MODE_SELECT_STREAMING 0x1
@@ -525,7 +529,6 @@ static const struct reg_value ov7251_setting_vga_90fps[] = {
{ 0x3662, 0x01 }, { 0x3662, 0x01 },
{ 0x3663, 0x70 }, { 0x3663, 0x70 },
{ 0x3664, 0x50 }, { 0x3664, 0x50 },
{ 0x3666, 0x0a },
{ 0x3669, 0x1a }, { 0x3669, 0x1a },
{ 0x366a, 0x00 }, { 0x366a, 0x00 },
{ 0x366b, 0x50 }, { 0x366b, 0x50 },
@@ -592,9 +595,8 @@ static const struct reg_value ov7251_setting_vga_90fps[] = {
{ 0x3c00, 0x89 }, { 0x3c00, 0x89 },
{ 0x3c01, 0x63 }, { 0x3c01, 0x63 },
{ 0x3c02, 0x01 }, { 0x3c02, 0x01 },
{ 0x3c03, 0x00 },
{ 0x3c04, 0x00 }, { 0x3c04, 0x00 },
{ 0x3c05, 0x03 }, { 0x3c05, 0x01 },
{ 0x3c06, 0x00 }, { 0x3c06, 0x00 },
{ 0x3c07, 0x06 }, { 0x3c07, 0x06 },
{ 0x3c0c, 0x01 }, { 0x3c0c, 0x01 },
@@ -624,6 +626,16 @@ static const struct reg_value ov7251_setting_vga_90fps[] = {
{ 0x5001, 0x80 }, { 0x5001, 0x80 },
}; };
static const struct reg_value ov7251_ext_trig_on[] = {
{ 0x3666, 0x00 },
{ 0x3c03, 0x17 },
};
static const struct reg_value ov7251_ext_trig_off[] = {
{ 0x3666, 0x0a },
{ 0x3c03, 0x00 },
};
static const unsigned long supported_xclk_rates[] = { static const unsigned long supported_xclk_rates[] = {
[OV7251_19_2_MHZ] = 19200000, [OV7251_19_2_MHZ] = 19200000,
[OV7251_24_MHZ] = 24000000, [OV7251_24_MHZ] = 24000000,
@@ -1376,6 +1388,23 @@ static int ov7251_s_stream(struct v4l2_subdev *subdev, int enable)
dev_err(ov7251->dev, "could not sync v4l2 controls\n"); dev_err(ov7251->dev, "could not sync v4l2 controls\n");
goto err_power_down; goto err_power_down;
} }
/* Set vsync trigger mode */
switch (trigger_mode) {
case 2:
ov7251_set_register_array(ov7251,
ov7251_ext_trig_on,
ARRAY_SIZE(ov7251_ext_trig_on));
break;
case 0:
default:
/* case 1 for ext trig source currently not implemented */
ov7251_set_register_array(ov7251,
ov7251_ext_trig_off,
ARRAY_SIZE(ov7251_ext_trig_off));
break;
}
ret = ov7251_write_reg(ov7251, OV7251_SC_MODE_SELECT, ret = ov7251_write_reg(ov7251, OV7251_SC_MODE_SELECT,
OV7251_SC_MODE_SELECT_STREAMING); OV7251_SC_MODE_SELECT_STREAMING);
if (ret) if (ret)