Hi Prabhakar, On Fri, Jul 31, 2020 at 02:18:12PM +0100, Lad, Prabhakar wrote: > On Fri, Jul 31, 2020 at 2:03 PM Sakari Ailus wrote: > > On Fri, Jul 31, 2020 at 10:24:46AM +0100, Lad Prabhakar wrote: > > > During testing this sensor on iW-RainboW-G21D-Qseven platform noticed the > > > capture worked only for first run and for subsequent runs it failed. > > > > > > This patch does the following in DVP mode: > > > 1: Enables data lines on power up > > > 2: Configures HVP lines on power up instead of configuring everytime on > > > stream ON/OFF > > > 3: Disables MIPI interface. > > > 4: Puts the sensor in power down mode during stream OFF. > > > > Could you detail a little the underlying problem, the environment where it > > can be reproduced and how the patch addresses it, please? > > my bad. > > > Are you using CSI-2 or the parallel interface, for instance? > > while using the sensor in parallel interface mode (DVP) 8-bit mode, > with rcar-vin bridge noticed the capture worked fine for the first run > (with yavta), but for subsequent runs the bridge driver waited for the > frame to be captured. Debugging further noticed the data lines were > enabled/disabled in stream on/off callback. But enabling the data > lines in startup (as done in the patch) fixed this issue. This looks like a hack though. We should disable the outputs somewhere, if not at stream off time, at least in ov5640_set_power(0). Leaving everything powered on will increase power consumption. This issue needs to be debugged further to understand what's going on, and a proper fix needs to then be submitted. > Without this patch I can confirm the i2c writes were happening in > stream on/off callback and the values were updated in the respective > register to enable/disable datalines. (I didn't find any information > relating to sequence of enabling the data lines in data sheet [1]) > > [1] https://cdn.sparkfun.com/datasheets/Sensors/LightImaging/OV5640_datasheet.pdf > > > > > > > Fixes: f22996db44e2d ("media: ov5640: add support of DVP parallel interface") > > > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> > > > Reviewed-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx> > > > --- > > > drivers/media/i2c/ov5640.c | 253 +++++++++++++++++++++------------------------ > > > 1 file changed, 120 insertions(+), 133 deletions(-) > > > > > > diff --git a/drivers/media/i2c/ov5640.c b/drivers/media/i2c/ov5640.c > > > index 2fe4a7a..ac305a5 100644 > > > --- a/drivers/media/i2c/ov5640.c > > > +++ b/drivers/media/i2c/ov5640.c > > > @@ -274,7 +274,7 @@ static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl) > > > /* YUV422 UYVY VGA@30fps */ > > > static const struct reg_value ov5640_init_setting_30fps_VGA[] = { > > > {0x3103, 0x11, 0, 0}, {0x3008, 0x82, 0, 5}, {0x3008, 0x42, 0, 0}, > > > - {0x3103, 0x03, 0, 0}, {0x3017, 0x00, 0, 0}, {0x3018, 0x00, 0, 0}, > > > + {0x3103, 0x03, 0, 0}, > > > {0x3630, 0x36, 0, 0}, > > > {0x3631, 0x0e, 0, 0}, {0x3632, 0xe2, 0, 0}, {0x3633, 0x12, 0, 0}, > > > {0x3621, 0xe0, 0, 0}, {0x3704, 0xa0, 0, 0}, {0x3703, 0x5a, 0, 0}, > > > @@ -1210,96 +1210,7 @@ static int ov5640_set_autogain(struct ov5640_dev *sensor, bool on) > > > > > > static int ov5640_set_stream_dvp(struct ov5640_dev *sensor, bool on) > > > { > > > - int ret; > > > - unsigned int flags = sensor->ep.bus.parallel.flags; > > > - u8 pclk_pol = 0; > > > - u8 hsync_pol = 0; > > > - u8 vsync_pol = 0; > > > - > > > - /* > > > - * Note about parallel port configuration. > > > - * > > > - * When configured in parallel mode, the OV5640 will > > > - * output 10 bits data on DVP data lines [9:0]. > > > - * If only 8 bits data are wanted, the 8 bits data lines > > > - * of the camera interface must be physically connected > > > - * on the DVP data lines [9:2]. > > > - * > > > - * Control lines polarity can be configured through > > > - * devicetree endpoint control lines properties. > > > - * If no endpoint control lines properties are set, > > > - * polarity will be as below: > > > - * - VSYNC: active high > > > - * - HREF: active low > > > - * - PCLK: active low > > > - */ > > > - > > > - if (on) { > > > - /* > > > - * configure parallel port control lines polarity > > > - * > > > - * POLARITY CTRL0 > > > - * - [5]: PCLK polarity (0: active low, 1: active high) > > > - * - [1]: HREF polarity (0: active low, 1: active high) > > > - * - [0]: VSYNC polarity (mismatch here between > > > - * datasheet and hardware, 0 is active high > > > - * and 1 is active low...) > > > - */ > > > - if (flags & V4L2_MBUS_PCLK_SAMPLE_RISING) > > > - pclk_pol = 1; > > > - if (flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) > > > - hsync_pol = 1; > > > - if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW) > > > - vsync_pol = 1; > > > - > > > - ret = ov5640_write_reg(sensor, > > > - OV5640_REG_POLARITY_CTRL00, > > > - (pclk_pol << 5) | > > > - (hsync_pol << 1) | > > > - vsync_pol); > > > - > > > - if (ret) > > > - return ret; > > > - } > > > - > > > - /* > > > - * powerdown MIPI TX/RX PHY & disable MIPI > > > - * > > > - * MIPI CONTROL 00 > > > - * 4: PWDN PHY TX > > > - * 3: PWDN PHY RX > > > - * 2: MIPI enable > > > - */ > > > - ret = ov5640_write_reg(sensor, > > > - OV5640_REG_IO_MIPI_CTRL00, on ? 0x18 : 0); > > > - if (ret) > > > - return ret; > > > - > > > - /* > > > - * enable VSYNC/HREF/PCLK DVP control lines > > > - * & D[9:6] DVP data lines > > > - * > > > - * PAD OUTPUT ENABLE 01 > > > - * - 6: VSYNC output enable > > > - * - 5: HREF output enable > > > - * - 4: PCLK output enable > > > - * - [3:0]: D[9:6] output enable > > > - */ > > > - ret = ov5640_write_reg(sensor, > > > - OV5640_REG_PAD_OUTPUT_ENABLE01, > > > - on ? 0x7f : 0); > > > - if (ret) > > > - return ret; > > > - > > > - /* > > > - * enable D[5:0] DVP data lines > > > - * > > > - * PAD OUTPUT ENABLE 02 > > > - * - [7:2]: D[5:0] output enable > > > - */ > > > - return ov5640_write_reg(sensor, > > > - OV5640_REG_PAD_OUTPUT_ENABLE02, > > > - on ? 0xfc : 0); > > > + return ov5640_write_reg(sensor, OV5640_REG_SYS_CTRL0, on ? 0x2 : 0x42); > > > } > > > > > > static int ov5640_set_stream_mipi(struct ov5640_dev *sensor, bool on) > > > @@ -2003,6 +1914,10 @@ static void ov5640_set_power_off(struct ov5640_dev *sensor) > > > > > > static int ov5640_set_power(struct ov5640_dev *sensor, bool on) > > > { > > > + unsigned int flags = sensor->ep.bus.parallel.flags; > > > + u8 pclk_pol = 0; > > > + u8 hsync_pol = 0; > > > + u8 vsync_pol = 0; > > > int ret = 0; > > > > > > if (on) { > > > @@ -2014,52 +1929,124 @@ static int ov5640_set_power(struct ov5640_dev *sensor, bool on) > > > if (ret) > > > goto power_off; > > > > > > - /* We're done here for DVP bus, while CSI-2 needs setup. */ > > > - if (sensor->ep.bus_type != V4L2_MBUS_CSI2_DPHY) > > > - return 0; > > > + /* CSI-2 setup. */ > > > + if (sensor->ep.bus_type == V4L2_MBUS_CSI2_DPHY) { > > > + /* > > > + * Power up MIPI HS Tx and LS Rx; 2 data lanes mode > > > + * > > > + * 0x300e = 0x40 > > > + * [7:5] = 010 : 2 data lanes mode (see FIXME note in > > > + * "ov5640_set_stream_mipi()") > > > + * [4] = 0 : Power up MIPI HS Tx > > > + * [3] = 0 : Power up MIPI LS Rx > > > + * [2] = 0 : MIPI interface disabled > > > + */ > > > + ret = ov5640_write_reg(sensor, OV5640_REG_IO_MIPI_CTRL00, 0x40); > > > > Please wrap lines over 80 if it can be reasonably one. > > checkpatch doesn't complain about it (size is increased to 100)? -- Regards, Laurent Pinchart
