[PATCH 15/19] media: i2c: ov4689: Set timing registers programmatically

Mikhail Rudenko
2023-12-11T17:51:05Z

Set timing-related and BLC anchor registers via cci calls instead of
hardcoding them in the register table. This prepares the driver for
implementation of configurable analogue crop and binning. No
functional change intended.

Signed-off-by: Mikhail Rudenko <mike.rudenko@gmail.com>
---
drivers/media/i2c/ov4689.c | 82 +++++++++++++++++++++++++++++++-------
1 file changed, 67 insertions(+), 15 deletions(-)

diff --git a/drivers/media/i2c/ov4689.c b/drivers/media/i2c/ov4689.c
index 5acdf9e1b670..9088b4c61cab 100644
--- a/drivers/media/i2c/ov4689.c
+++ b/drivers/media/i2c/ov4689.c
@@ -52,6 +52,15 @@
#define OV4689_TEST_PATTERN_ENABLE 0x80
#define OV4689_TEST_PATTERN_DISABLE 0x0

+#define OV4689_REG_H_CROP_START CCI_REG16(0x3800)
+#define OV4689_REG_V_CROP_START CCI_REG16(0x3802)
+#define OV4689_REG_H_CROP_END CCI_REG16(0x3804)
+#define OV4689_REG_V_CROP_END CCI_REG16(0x3806)
+#define OV4689_REG_H_OUTPUT_SIZE CCI_REG16(0x3808)
+#define OV4689_REG_V_OUTPUT_SIZE CCI_REG16(0x380a)
+#define OV4689_REG_H_WIN_OFF CCI_REG16(0x3810)
+#define OV4689_REG_V_WIN_OFF CCI_REG16(0x3812)
+
#define OV4689_REG_VTS CCI_REG16(0x380e)
#define OV4689_VTS_MAX 0x7fff

@@ -67,6 +76,17 @@
#define OV4689_TIMING_FLIP_BOTH (OV4689_TIMING_FLIP_ARRAY |\
OV4689_TIMING_FLIP_DIGITAL)

+#define OV4689_REG_ANCHOR_LEFT_START CCI_REG16(0x4020)
+#define OV4689_ANCHOR_LEFT_START_DEF 576
+#define OV4689_REG_ANCHOR_LEFT_END CCI_REG16(0x4022)
+#define OV4689_ANCHOR_LEFT_END_DEF 831
+#define OV4689_REG_ANCHOR_RIGHT_START CCI_REG16(0x4024)
+#define OV4689_ANCHOR_RIGHT_START_DEF 1984
+#define OV4689_REG_ANCHOR_RIGHT_END CCI_REG16(0x4026)
+#define OV4689_ANCHOR_RIGHT_END_DEF 2239
+
+#define OV4689_REG_VFIFO_CTRL_01 CCI_REG8(0x4601)
+
#define OV4689_LANES 4
#define OV4689_XVCLK_FREQ 24000000

@@ -199,10 +219,6 @@ static const struct cci_reg_sequence ov4689_2688x1520_regs[] = {
{CCI_REG8(0x3798), 0x1b},

/* Timing control */
- {CCI_REG8(0x3801), 0x08}, /* H_CROP_START_L h_crop_start[7:0] = 0x08 */
- {CCI_REG8(0x3805), 0x97}, /* H_CROP_END_L h_crop_end[7:0] = 0x97 */
- {CCI_REG8(0x3811), 0x08}, /* H_WIN_OFF_L h_win_off[7:0] = 0x08*/
- {CCI_REG8(0x3813), 0x04}, /* V_WIN_OFF_L v_win_off[7:0] = 0x04 */
{CCI_REG8(0x3819), 0x01}, /* VSYNC_END_L vsync_end_point[7:0] = 0x01 */

/* OTP control */
@@ -218,22 +234,11 @@ static const struct cci_reg_sequence ov4689_2688x1520_regs[] = {
{CCI_REG8(0x401b), 0x00}, /* DEBUG_MODE */
{CCI_REG8(0x401d), 0x00}, /* DEBUG_MODE */
{CCI_REG8(0x401f), 0x00}, /* DEBUG_MODE */
- {CCI_REG8(0x4020), 0x00}, /* ANCHOR_LEFT_START_H anchor_left_start[11:8] = 0 */
- {CCI_REG8(0x4021), 0x10}, /* ANCHOR_LEFT_START_L anchor_left_start[7:0] = 0x10 */
- {CCI_REG8(0x4022), 0x07}, /* ANCHOR_LEFT_END_H anchor_left_end[11:8] = 0x07 */
- {CCI_REG8(0x4023), 0xcf}, /* ANCHOR_LEFT_END_L anchor_left_end[7:0] = 0xcf */
- {CCI_REG8(0x4024), 0x09}, /* ANCHOR_RIGHT_START_H anchor_right_start[11:8] = 0x09 */
- {CCI_REG8(0x4025), 0x60}, /* ANCHOR_RIGHT_START_L anchor_right_start[7:0] = 0x60 */
- {CCI_REG8(0x4026), 0x09}, /* ANCHOR_RIGHT_END_H anchor_right_end[11:8] = 0x09 */
- {CCI_REG8(0x4027), 0x6f}, /* ANCHOR_RIGHT_END_L anchor_right_end[7:0] = 0x6f */

/* ADC sync control */
{CCI_REG8(0x4500), 0x6c}, /* ADC_SYNC_CTRL */
{CCI_REG8(0x4503), 0x01}, /* ADC_SYNC_CTRL */

- /* VFIFO */
- {CCI_REG8(0x4601), 0xa7}, /* VFIFO_CTRL_01 r_vfifo_read_start[7:0] = 0xa7 */
-
/* Temperature monitor */
{CCI_REG8(0x4d00), 0x04}, /* TPM_CTRL_00 tmp_slope[15:8] = 0x04 */
{CCI_REG8(0x4d01), 0x42}, /* TPM_CTRL_01 tmp_slope[7:0] = 0x42 */
@@ -406,6 +411,41 @@ static int ov4689_get_selection(struct v4l2_subdev *sd,
return -EINVAL;
}

+static int ov4689_setup_timings(struct ov4689 *ov4689)
+{
+ const struct ov4689_mode *mode = ov4689->cur_mode;
+ struct regmap *rm = ov4689->regmap;
+ int ret = 0;
+
+ cci_write(rm, OV4689_REG_H_CROP_START, 8, &ret);
+ cci_write(rm, OV4689_REG_V_CROP_START, 8, &ret);
+ cci_write(rm, OV4689_REG_H_CROP_END, 2711, &ret);
+ cci_write(rm, OV4689_REG_V_CROP_END, 1531, &ret);
+
+ cci_write(rm, OV4689_REG_H_OUTPUT_SIZE, mode->width, &ret);
+ cci_write(rm, OV4689_REG_V_OUTPUT_SIZE, mode->height, &ret);
+
+ cci_write(rm, OV4689_REG_H_WIN_OFF, 8, &ret);
+ cci_write(rm, OV4689_REG_V_WIN_OFF, 4, &ret);
+
+ cci_write(rm, OV4689_REG_VFIFO_CTRL_01, 167, &ret);
+
+ return ret;
+}
+
+static int ov4689_setup_blc_anchors(struct ov4689 *ov4689)
+{
+ struct regmap *rm = ov4689->regmap;
+ int ret = 0;
+
+ cci_write(rm, OV4689_REG_ANCHOR_LEFT_START, 16, &ret);
+ cci_write(rm, OV4689_REG_ANCHOR_LEFT_END, 1999, &ret);
+ cci_write(rm, OV4689_REG_ANCHOR_RIGHT_START, 2400, &ret);
+ cci_write(rm, OV4689_REG_ANCHOR_RIGHT_END, 2415, &ret);
+
+ return ret;
+}
+
static int ov4689_s_stream(struct v4l2_subdev *sd, int on)
{
struct ov4689 *ov4689 = to_ov4689(sd);
@@ -429,6 +469,18 @@ static int ov4689_s_stream(struct v4l2_subdev *sd, int on)
goto unlock_and_return;
}

+ ret = ov4689_setup_timings(ov4689);
+ if (ret) {
+ pm_runtime_put(dev);
+ goto unlock_and_return;
+ }
+
+ ret = ov4689_setup_blc_anchors(ov4689);
+ if (ret) {
+ pm_runtime_put(dev);
+ goto unlock_and_return;
+ }
+
ret = __v4l2_ctrl_handler_setup(&ov4689->ctrl_handler);
if (ret) {
pm_runtime_put(dev);
--
2.43.0