mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-20 06:08:08 +00:00
20ea6adbf1
Build system: x86_64 Build-tested: bcm2708, bcm2709, bcm2710, bcm2711 Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B Signed-off-by: Marty Jones <mj8263788@gmail.com> Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
79 lines
2.6 KiB
Diff
79 lines
2.6 KiB
Diff
From 1c779e83e5f78cadcd8dfc6cfca33e7aeb323f27 Mon Sep 17 00:00:00 2001
|
|
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
|
|
Date: Thu, 17 Feb 2022 16:44:33 +0000
|
|
Subject: [PATCH] media: i2c: ov7251: Limit exposure based on VTS
|
|
|
|
The maximum exposure is dictated by VTS, so compute it rather
|
|
than having the value in the mode table.
|
|
|
|
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
|
|
---
|
|
drivers/media/i2c/ov7251.c | 14 ++++++--------
|
|
1 file changed, 6 insertions(+), 8 deletions(-)
|
|
|
|
--- a/drivers/media/i2c/ov7251.c
|
|
+++ b/drivers/media/i2c/ov7251.c
|
|
@@ -37,6 +37,8 @@
|
|
#define OV7251_AEC_EXPO_2 0x3502
|
|
#define OV7251_AEC_AGC_ADJ_0 0x350a
|
|
#define OV7251_AEC_AGC_ADJ_1 0x350b
|
|
+/* Exposure must be at least 20 lines shorter than VTS */
|
|
+#define OV7251_EXPOSURE_OFFSET 20
|
|
/* HTS is registers 0x380c and 0x380d */
|
|
#define OV7251_HTS 0x3a0
|
|
#define OV7251_VTS_HIGH 0x380e
|
|
@@ -82,7 +84,6 @@ struct ov7251_mode_info {
|
|
u32 height;
|
|
const struct reg_value *data;
|
|
u32 data_size;
|
|
- u16 exposure_max;
|
|
u16 exposure_def;
|
|
u16 vts;
|
|
struct v4l2_fract timeperframe;
|
|
@@ -348,7 +349,6 @@ static const struct ov7251_mode_info ov7
|
|
.height = 480,
|
|
.data = ov7251_setting_vga,
|
|
.data_size = ARRAY_SIZE(ov7251_setting_vga),
|
|
- .exposure_max = 1704,
|
|
.exposure_def = 504,
|
|
.vts = 0x6bc,
|
|
.timeperframe = {
|
|
@@ -361,7 +361,6 @@ static const struct ov7251_mode_info ov7
|
|
.height = 480,
|
|
.data = ov7251_setting_vga,
|
|
.data_size = ARRAY_SIZE(ov7251_setting_vga),
|
|
- .exposure_max = 840,
|
|
.exposure_def = 504,
|
|
.vts = 0x35c,
|
|
.timeperframe = {
|
|
@@ -374,7 +373,6 @@ static const struct ov7251_mode_info ov7
|
|
.height = 480,
|
|
.data = ov7251_setting_vga,
|
|
.data_size = ARRAY_SIZE(ov7251_setting_vga),
|
|
- .exposure_max = 552,
|
|
.exposure_def = 504,
|
|
.vts = 0x23c,
|
|
.timeperframe = {
|
|
@@ -915,8 +913,8 @@ static int ov7251_set_format(struct v4l2
|
|
h_blank, 1, h_blank);
|
|
__v4l2_ctrl_s_ctrl(ov7251->hblank, h_blank);
|
|
|
|
- ret = __v4l2_ctrl_modify_range(ov7251->exposure,
|
|
- 1, new_mode->exposure_max,
|
|
+ ret = __v4l2_ctrl_modify_range(ov7251->exposure, 1,
|
|
+ new_mode->vts - OV7251_EXPOSURE_OFFSET,
|
|
1, new_mode->exposure_def);
|
|
if (ret < 0)
|
|
goto exit;
|
|
@@ -1092,8 +1090,8 @@ static int ov7251_set_frame_interval(str
|
|
new_mode = ov7251_find_mode_by_ival(ov7251, &fi->interval);
|
|
|
|
if (new_mode != ov7251->current_mode) {
|
|
- ret = __v4l2_ctrl_modify_range(ov7251->exposure,
|
|
- 1, new_mode->exposure_max,
|
|
+ ret = __v4l2_ctrl_modify_range(ov7251->exposure, 1,
|
|
+ new_mode->vts - OV7251_EXPOSURE_OFFSET,
|
|
1, new_mode->exposure_def);
|
|
if (ret < 0)
|
|
goto exit;
|