diff options
| author | Sandor Yu <Sandor.yu@nxp.com> | 2017-12-14 11:18:30 +0800 |
|---|---|---|
| committer | Leonard Crestez <leonard.crestez@nxp.com> | 2018-08-24 12:41:33 +0300 |
| commit | 1739c153c108dca750211ac937791a279d9ccdc7 (patch) | |
| tree | d9e4f6a682833587d0c2999bf3b4ac396f36ebeb /drivers | |
| parent | 1f326a3a55d801961063b28c87028565ff2210e0 (diff) | |
MLK-17208-4: mipi csi: Add rxhs_settle calculate function
Add rxhs_settle calculate function according mipi csi phy
clock rate.
Signed-off-by: Sandor Yu <Sandor.yu@nxp.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/media/platform/imx8/mxc-mipi-csi2.c | 40 |
1 files changed, 33 insertions, 7 deletions
diff --git a/drivers/media/platform/imx8/mxc-mipi-csi2.c b/drivers/media/platform/imx8/mxc-mipi-csi2.c index 18bee2002eda..70481fc4df1f 100644 --- a/drivers/media/platform/imx8/mxc-mipi-csi2.c +++ b/drivers/media/platform/imx8/mxc-mipi-csi2.c @@ -47,6 +47,25 @@ static struct mxc_mipi_csi2_dev *sd_to_mxc_mipi_csi2_dev(struct v4l2_subdev *sde return container_of(sdev, struct mxc_mipi_csi2_dev, sd); } +/**************************************** + * rxhs-settle calculate + * UI = 1000 / mipi csi phy clock + * THS-SETTLE_mim = 85ns + 6 * UI + * THS-SETTLE_max = 145ns +10 * UI + * PRG_RXHS_SETTLE = THS-SETTLE / (Tperiod of RxClk_ESC) + 1 + ****************************************/ +static int calc_hs_settle(struct mxc_mipi_csi2_dev *csi2dev, u32 dphy_clk) +{ + u32 esc_rate; + u32 hs_settle; + u32 rxhs_settle; + + esc_rate = clk_get_rate(csi2dev->clk_esc) / 1000000; + hs_settle = 115 + 8 * 1000 / dphy_clk; + rxhs_settle = hs_settle / (1000 / esc_rate) - 1; + return rxhs_settle; +} + #ifdef debug static void mxc_mipi_csi2_reg_dump(struct mxc_mipi_csi2_dev *csi2dev) { @@ -282,16 +301,23 @@ static int mxc_csi2_get_sensor_fmt(struct mxc_mipi_csi2_dev *csi2dev) if (ret < 0 && ret != -ENOIOCTLCMD) return -EINVAL; + /* Update input frame size and formate */ memcpy(mf, &src_fmt.format, sizeof(struct v4l2_mbus_framefmt)); - /* Update input frame size and formate */ dev_dbg(&csi2dev->pdev->dev, "width=%d, height=%d, fmt.code=0x%x\n", mf->width, mf->height, mf->code); - if (src_fmt.format.height * src_fmt.format.width > 1024 * 768) - csi2dev->hs_settle = rxhs_settle[2]; - else if (src_fmt.format.height * src_fmt.format.width < 480 * 320) - csi2dev->hs_settle = rxhs_settle[0]; - else - csi2dev->hs_settle = rxhs_settle[1]; + + /* Get rxhs settle */ + if (src_fmt.format.reserved[0] != 0) + csi2dev->hs_settle = calc_hs_settle(csi2dev, src_fmt.format.reserved[0]); + else { + if (src_fmt.format.height * src_fmt.format.width > 1024 * 768) + csi2dev->hs_settle = rxhs_settle[2]; + else if (src_fmt.format.height * src_fmt.format.width < 480 * 320) + csi2dev->hs_settle = rxhs_settle[0]; + else + csi2dev->hs_settle = rxhs_settle[1]; + } + return 0; } |