V4L/DVB (10673): mt9t031: fix gain and hflip controls, register update, and scaling
Multiple fixes: 1. allow register update by setting the Output Control register to 2 and not 3 2. fix scaling factor calculations 3. recover lost HFLIP control 4. fix Global Gain calculation Signed-off-by: Guennadi Liakhovetski <lg@denx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Guennadi Liakhovetski
Mauro Carvalho Chehab
parent
c8329accf7
commit
70e1d353e5
@ -150,7 +150,7 @@ static int mt9t031_init(struct soc_camera_device *icd)
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if (ret >= 0)
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ret = reg_write(icd, MT9T031_RESET, 0);
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if (ret >= 0)
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ret = reg_clear(icd, MT9T031_OUTPUT_CONTROL, 3);
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ret = reg_clear(icd, MT9T031_OUTPUT_CONTROL, 2);
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return ret >= 0 ? 0 : -EIO;
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}
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@ -158,14 +158,14 @@ static int mt9t031_init(struct soc_camera_device *icd)
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static int mt9t031_release(struct soc_camera_device *icd)
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{
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/* Disable the chip */
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reg_clear(icd, MT9T031_OUTPUT_CONTROL, 3);
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reg_clear(icd, MT9T031_OUTPUT_CONTROL, 2);
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return 0;
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}
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static int mt9t031_start_capture(struct soc_camera_device *icd)
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{
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/* Switch to master "normal" mode */
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if (reg_set(icd, MT9T031_OUTPUT_CONTROL, 3) < 0)
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if (reg_set(icd, MT9T031_OUTPUT_CONTROL, 2) < 0)
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return -EIO;
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return 0;
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}
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@ -173,7 +173,7 @@ static int mt9t031_start_capture(struct soc_camera_device *icd)
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static int mt9t031_stop_capture(struct soc_camera_device *icd)
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{
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/* Stop sensor readout */
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if (reg_clear(icd, MT9T031_OUTPUT_CONTROL, 3) < 0)
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if (reg_clear(icd, MT9T031_OUTPUT_CONTROL, 2) < 0)
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return -EIO;
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return 0;
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}
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@ -201,6 +201,18 @@ static unsigned long mt9t031_query_bus_param(struct soc_camera_device *icd)
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return soc_camera_apply_sensor_flags(icl, MT9T031_BUS_PARAM);
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}
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/* Round up minima and round down maxima */
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static void recalculate_limits(struct soc_camera_device *icd,
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u16 xskip, u16 yskip)
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{
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icd->x_min = (MT9T031_COLUMN_SKIP + xskip - 1) / xskip;
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icd->y_min = (MT9T031_ROW_SKIP + yskip - 1) / yskip;
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icd->width_min = (MT9T031_MIN_WIDTH + xskip - 1) / xskip;
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icd->height_min = (MT9T031_MIN_HEIGHT + yskip - 1) / yskip;
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icd->width_max = MT9T031_MAX_WIDTH / xskip;
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icd->height_max = MT9T031_MAX_HEIGHT / yskip;
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}
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static int mt9t031_set_fmt(struct soc_camera_device *icd,
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__u32 pixfmt, struct v4l2_rect *rect)
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{
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@ -208,54 +220,70 @@ static int mt9t031_set_fmt(struct soc_camera_device *icd,
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int ret;
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const u16 hblank = MT9T031_HORIZONTAL_BLANK,
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vblank = MT9T031_VERTICAL_BLANK;
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u16 xbin, xskip = mt9t031->xskip, ybin, yskip = mt9t031->yskip,
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width = rect->width * xskip, height = rect->height * yskip;
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u16 xbin, xskip, ybin, yskip, width, height, left, top;
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if (pixfmt) {
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/* S_FMT - use binning and skipping for scaling, recalculate */
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/*
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* try_fmt has put rectangle within limits.
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* S_FMT - use binning and skipping for scaling, recalculate
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* limits, used for cropping
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*/
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/* Is this more optimal than just a division? */
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for (xskip = 8; xskip > 1; xskip--)
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if (rect->width * xskip <= icd->width_max)
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if (rect->width * xskip <= MT9T031_MAX_WIDTH)
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break;
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for (yskip = 8; yskip > 1; yskip--)
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if (rect->height * yskip <= icd->height_max)
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if (rect->height * yskip <= MT9T031_MAX_HEIGHT)
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break;
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width = rect->width * xskip;
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height = rect->height * yskip;
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dev_dbg(&icd->dev, "xskip %u, width %u, yskip %u, height %u\n",
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xskip, width, yskip, height);
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recalculate_limits(icd, xskip, yskip);
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} else {
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/* CROP - no change in scaling, or in limits */
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xskip = mt9t031->xskip;
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yskip = mt9t031->yskip;
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}
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/* Make sure we don't exceed sensor limits */
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if (rect->left + rect->width > icd->width_max)
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rect->left = (icd->width_max - rect->width) / 2 + icd->x_min;
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if (rect->top + rect->height > icd->height_max)
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rect->top = (icd->height_max - rect->height) / 2 + icd->y_min;
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width = rect->width * xskip;
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height = rect->height * yskip;
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left = rect->left * xskip;
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top = rect->top * yskip;
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xbin = min(xskip, (u16)3);
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ybin = min(yskip, (u16)3);
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/* Make sure we don't exceed frame limits */
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if (rect->left + width > icd->width_max)
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rect->left = (icd->width_max - width) / 2;
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dev_dbg(&icd->dev, "xskip %u, width %u/%u, yskip %u, height %u/%u\n",
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xskip, width, rect->width, yskip, height, rect->height);
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if (rect->top + height > icd->height_max)
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rect->top = (icd->height_max - height) / 2;
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/* Could just do roundup(rect->left, [xy]bin); but this is cheaper */
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/* Could just do roundup(rect->left, [xy]bin * 2); but this is cheaper */
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switch (xbin) {
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case 2:
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rect->left = (rect->left + 1) & ~1;
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left = (left + 3) & ~3;
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break;
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case 3:
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rect->left = roundup(rect->left, 3);
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left = roundup(left, 6);
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}
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switch (ybin) {
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case 2:
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rect->top = (rect->top + 1) & ~1;
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top = (top + 3) & ~3;
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break;
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case 3:
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rect->top = roundup(rect->top, 3);
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top = roundup(top, 6);
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}
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/* Disable register update, reconfigure atomically */
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ret = reg_set(icd, MT9T031_OUTPUT_CONTROL, 1);
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if (ret < 0)
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return ret;
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/* Blanking and start values - default... */
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ret = reg_write(icd, MT9T031_HORIZONTAL_BLANKING, hblank);
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if (ret >= 0)
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@ -270,14 +298,14 @@ static int mt9t031_set_fmt(struct soc_camera_device *icd,
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ret = reg_write(icd, MT9T031_ROW_ADDRESS_MODE,
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((ybin - 1) << 4) | (yskip - 1));
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}
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dev_dbg(&icd->dev, "new left %u, top %u\n", rect->left, rect->top);
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dev_dbg(&icd->dev, "new physical left %u, top %u\n", left, top);
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/* The caller provides a supported format, as guaranteed by
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* icd->try_fmt_cap(), soc_camera_s_crop() and soc_camera_cropcap() */
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if (ret >= 0)
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ret = reg_write(icd, MT9T031_COLUMN_START, rect->left);
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ret = reg_write(icd, MT9T031_COLUMN_START, left);
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if (ret >= 0)
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ret = reg_write(icd, MT9T031_ROW_START, rect->top);
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ret = reg_write(icd, MT9T031_ROW_START, top);
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if (ret >= 0)
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ret = reg_write(icd, MT9T031_WINDOW_WIDTH, width - 1);
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if (ret >= 0)
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@ -302,6 +330,9 @@ static int mt9t031_set_fmt(struct soc_camera_device *icd,
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mt9t031->yskip = yskip;
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}
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/* Re-enable register update, commit all changes */
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reg_clear(icd, MT9T031_OUTPUT_CONTROL, 1);
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return ret < 0 ? ret : 0;
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}
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@ -310,14 +341,14 @@ static int mt9t031_try_fmt(struct soc_camera_device *icd,
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{
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struct v4l2_pix_format *pix = &f->fmt.pix;
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if (pix->height < icd->height_min)
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pix->height = icd->height_min;
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if (pix->height > icd->height_max)
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pix->height = icd->height_max;
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if (pix->width < icd->width_min)
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pix->width = icd->width_min;
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if (pix->width > icd->width_max)
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pix->width = icd->width_max;
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if (pix->height < MT9T031_MIN_HEIGHT)
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pix->height = MT9T031_MIN_HEIGHT;
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if (pix->height > MT9T031_MAX_HEIGHT)
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pix->height = MT9T031_MAX_HEIGHT;
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if (pix->width < MT9T031_MIN_WIDTH)
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pix->width = MT9T031_MIN_WIDTH;
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if (pix->width > MT9T031_MAX_WIDTH)
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pix->width = MT9T031_MAX_WIDTH;
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pix->width &= ~0x01; /* has to be even */
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pix->height &= ~0x01; /* has to be even */
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@ -389,6 +420,14 @@ static const struct v4l2_queryctrl mt9t031_controls[] = {
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.maximum = 1,
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.step = 1,
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.default_value = 0,
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}, {
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.id = V4L2_CID_HFLIP,
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.type = V4L2_CTRL_TYPE_BOOLEAN,
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.name = "Flip Horizontally",
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.minimum = 0,
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.maximum = 1,
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.step = 1,
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.default_value = 0,
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}, {
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.id = V4L2_CID_GAIN,
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.type = V4L2_CTRL_TYPE_INTEGER,
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@ -513,21 +552,23 @@ static int mt9t031_set_control(struct soc_camera_device *icd, struct v4l2_contro
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if (data < 0)
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return -EIO;
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} else {
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/* Pack it into 1.125..15 variable step, register values 9..67 */
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/* Pack it into 1.125..128 variable step, register values 9..0x7860 */
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/* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */
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unsigned long range = qctrl->maximum - qctrl->default_value - 1;
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/* calculated gain: map 65..127 to 9..1024 step 0.125 */
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unsigned long gain = ((ctrl->value - qctrl->default_value - 1) *
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111 + range / 2) / range + 9;
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1015 + range / 2) / range + 9;
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if (gain <= 32)
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if (gain <= 32) /* calculated gain 9..32 -> 9..32 */
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data = gain;
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else if (gain <= 64)
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else if (gain <= 64) /* calculated gain 33..64 -> 0x51..0x60 */
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data = ((gain - 32) * 16 + 16) / 32 + 80;
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else
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data = ((gain - 64) * 7 + 28) / 56 + 96;
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/* calculated gain 65..1024 -> (1..120) << 8 + 0x60 */
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data = (((gain - 64 + 7) * 32) & 0xff00) | 0x60;
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dev_dbg(&icd->dev, "Setting gain from %d to %d\n",
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reg_read(icd, MT9T031_GLOBAL_GAIN), data);
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dev_dbg(&icd->dev, "Setting gain from 0x%x to 0x%x\n",
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reg_read(icd, MT9T031_GLOBAL_GAIN), data);
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data = reg_write(icd, MT9T031_GLOBAL_GAIN, data);
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if (data < 0)
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return -EIO;
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