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Subject[PATCH v2 2/2] media: imx274: add support for sensor mode6, 1280x540
Date
Add support for the mode 6 for the sensor, this mode uses
3/8 subsampling and 3 horizontal binning.
Aspect ratio is changed.
Split the bin_ratio variable into two parts, one for
width and one for height, as the ratio is no longer preserved
when doing subsampling in this mode.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
---
Changes in v2:
- changed ratios to u8 instead of int
- changed dbg message to show ratio x ratio instead of ratio:ratio
- fixed typo in comment 1920 instead of 1620

drivers/media/i2c/imx274.c | 84 +++++++++++++++++++++++++++++++-------
1 file changed, 70 insertions(+), 14 deletions(-)

diff --git a/drivers/media/i2c/imx274.c b/drivers/media/i2c/imx274.c
index 69221c2c192c..0a2a14789ea2 100644
--- a/drivers/media/i2c/imx274.c
+++ b/drivers/media/i2c/imx274.c
@@ -151,7 +151,8 @@ static const struct regmap_config imx274_regmap_config = {
* implemented modes.
*
* @init_regs: registers to initialize the mode
- * @bin_ratio: downscale factor (e.g. 3 for 3:1 binning)
+ * @wbin_ratio: width downscale factor (e.g. 3 for 1280; 3 = 3840/1280)
+ * @hbin_ratio: height downscale factor (e.g. 3 for 720; 3 = 2160/720)
* @min_frame_len: Minimum frame length for each mode (see "Frame Rate
* Adjustment (CSI-2)" in the datasheet)
* @min_SHR: Minimum SHR register value (see "Shutter Setting (CSI-2)" in the
@@ -162,7 +163,8 @@ static const struct regmap_config imx274_regmap_config = {
*/
struct imx274_mode {
const struct reg_8 *init_regs;
- unsigned int bin_ratio;
+ u8 wbin_ratio;
+ u8 hbin_ratio;
int min_frame_len;
int min_SHR;
int max_fps;
@@ -325,6 +327,46 @@ static const struct reg_8 imx274_mode5_1280x720_raw10[] = {
{IMX274_TABLE_END, 0x00}
};

+/*
+ * Vertical 2/8 subsampling horizontal 3 binning
+ * imx274 mode6(refer to datasheet) register configuration with
+ * 1280x540 resolution, raw10 data and mipi four lane output
+ */
+static const struct reg_8 imx274_mode6_1280x540_raw10[] = {
+ {0x3004, 0x04}, /* mode setting */
+ {0x3005, 0x31},
+ {0x3006, 0x00},
+ {0x3007, 0x02}, /* mode setting */
+
+ {0x3018, 0xA2}, /* output XVS, HVS */
+
+ {0x306B, 0x05},
+ {0x30E2, 0x04}, /* mode setting */
+
+ {0x30EE, 0x01},
+ {0x3342, 0x0A},
+ {0x3343, 0x00},
+ {0x3344, 0x16},
+ {0x3345, 0x00},
+ {0x33A6, 0x01},
+ {0x3528, 0x0E},
+ {0x3554, 0x1F},
+ {0x3555, 0x01},
+ {0x3556, 0x01},
+ {0x3557, 0x01},
+ {0x3558, 0x01},
+ {0x3559, 0x00},
+ {0x355A, 0x00},
+ {0x35BA, 0x0E},
+ {0x366A, 0x1B},
+ {0x366B, 0x1A},
+ {0x366C, 0x19},
+ {0x366D, 0x17},
+ {0x3A41, 0x04},
+
+ {IMX274_TABLE_END, 0x00}
+};
+
/*
* imx274 first step register configuration for
* starting stream
@@ -438,7 +480,8 @@ static const struct reg_8 imx274_tp_regs[] = {
static const struct imx274_mode imx274_modes[] = {
{
/* mode 1, 4K */
- .bin_ratio = 1,
+ .wbin_ratio = 1, /* 3840 */
+ .hbin_ratio = 1, /* 2160 */
.init_regs = imx274_mode1_3840x2160_raw10,
.min_frame_len = 4550,
.min_SHR = 12,
@@ -447,7 +490,8 @@ static const struct imx274_mode imx274_modes[] = {
},
{
/* mode 3, 1080p */
- .bin_ratio = 2,
+ .wbin_ratio = 2, /* 1920 */
+ .hbin_ratio = 2, /* 1080 */
.init_regs = imx274_mode3_1920x1080_raw10,
.min_frame_len = 2310,
.min_SHR = 8,
@@ -456,13 +500,24 @@ static const struct imx274_mode imx274_modes[] = {
},
{
/* mode 5, 720p */
- .bin_ratio = 3,
+ .wbin_ratio = 3, /* 1280 */
+ .hbin_ratio = 3, /* 720 */
.init_regs = imx274_mode5_1280x720_raw10,
.min_frame_len = 2310,
.min_SHR = 8,
.max_fps = 120,
.nocpiop = 112,
},
+ {
+ /* mode 6, 540p */
+ .wbin_ratio = 3, /* 1280 */
+ .hbin_ratio = 4, /* 540 */
+ .init_regs = imx274_mode6_1280x540_raw10,
+ .min_frame_len = 2310,
+ .min_SHR = 4,
+ .max_fps = 120,
+ .nocpiop = 112,
+ },
};

/*
@@ -885,12 +940,13 @@ static int __imx274_change_compose(struct stimx274 *imx274,
}

for (i = 0; i < ARRAY_SIZE(imx274_modes); i++) {
- unsigned int ratio = imx274_modes[i].bin_ratio;
+ u8 wratio = imx274_modes[i].wbin_ratio;
+ u8 hratio = imx274_modes[i].hbin_ratio;

int goodness = imx274_binning_goodness(
imx274,
- cur_crop->width / ratio, *width,
- cur_crop->height / ratio, *height,
+ cur_crop->width / wratio, *width,
+ cur_crop->height / hratio, *height,
flags);

if (goodness >= best_goodness) {
@@ -899,14 +955,14 @@ static int __imx274_change_compose(struct stimx274 *imx274,
}
}

- *width = cur_crop->width / best_mode->bin_ratio;
- *height = cur_crop->height / best_mode->bin_ratio;
+ *width = cur_crop->width / best_mode->wbin_ratio;
+ *height = cur_crop->height / best_mode->hbin_ratio;

if (which == V4L2_SUBDEV_FORMAT_ACTIVE)
imx274->mode = best_mode;

- dev_dbg(dev, "%s: selected %u:1 binning\n",
- __func__, best_mode->bin_ratio);
+ dev_dbg(dev, "%s: selected %ux%u binning\n",
+ __func__, best_mode->wbin_ratio, best_mode->hbin_ratio);

tgt_fmt->width = *width;
tgt_fmt->height = *height;
@@ -1833,8 +1889,8 @@ static int imx274_probe(struct i2c_client *client)
imx274->mode = &imx274_modes[0];
imx274->crop.width = IMX274_MAX_WIDTH;
imx274->crop.height = IMX274_MAX_HEIGHT;
- imx274->format.width = imx274->crop.width / imx274->mode->bin_ratio;
- imx274->format.height = imx274->crop.height / imx274->mode->bin_ratio;
+ imx274->format.width = imx274->crop.width / imx274->mode->wbin_ratio;
+ imx274->format.height = imx274->crop.height / imx274->mode->hbin_ratio;
imx274->format.field = V4L2_FIELD_NONE;
imx274->format.code = MEDIA_BUS_FMT_SRGGB10_1X10;
imx274->format.colorspace = V4L2_COLORSPACE_SRGB;
--
2.25.1
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