Re: [V3, 4/4] media: platform: dwc: Add MIPI CSI-2 controller driver

Luis de Oliveira
2019-01-10T16:18:46Z

On 09-Jan-19 13:07, Eugen.Hristev@microchip.com wrote:
>
>
> On 19.10.2018 15:52, Luis Oliveira wrote:
>> Add the Synopsys MIPI CSI-2 controller driver. This
>> controller driver is divided in platform dependent functions
>> and core functions. It also includes a platform for future
>> DesignWare drivers.
>>
>> Signed-off-by: Luis Oliveira <lolivei@synopsys.com>
>> ---
>> Changelog
>> v2-V3
>> - exposed IPI settings to userspace
>> - fixed headers
>>
>> MAINTAINERS | 11 +
>> drivers/media/platform/dwc/Kconfig | 30 +-
>> drivers/media/platform/dwc/Makefile | 2 +
>> drivers/media/platform/dwc/dw-csi-plat.c | 699 +++++++++++++++++++++++++++++++
>> drivers/media/platform/dwc/dw-csi-plat.h | 77 ++++
>> drivers/media/platform/dwc/dw-mipi-csi.c | 494 ++++++++++++++++++++++
>> drivers/media/platform/dwc/dw-mipi-csi.h | 202 +++++++++
>> include/media/dwc/dw-mipi-csi-pltfrm.h | 102 +++++
>> 8 files changed, 1616 insertions(+), 1 deletion(-)
>> create mode 100644 drivers/media/platform/dwc/dw-csi-plat.c
>> create mode 100644 drivers/media/platform/dwc/dw-csi-plat.h
>> create mode 100644 drivers/media/platform/dwc/dw-mipi-csi.c
>> create mode 100644 drivers/media/platform/dwc/dw-mipi-csi.h
>> create mode 100644 include/media/dwc/dw-mipi-csi-pltfrm.h
>>
>
> [snip]
>
>> +/* Video formats supported by the MIPI CSI-2 */
>> +const struct mipi_fmt dw_mipi_csi_formats[] = {
>> + {
>> + /* RAW 8 */
>> + .code = MEDIA_BUS_FMT_SBGGR8_1X8,
>> + .depth = 8,
>> + },
>> + {
>> + /* RAW 10 */
>> + .code = MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE,
>> + .depth = 10,
>> + },
>
> Hi Luis,
>
> Any reason why RAW12 format is not handled here ?
>
> Here, namely MEDIA_BUS_FMT_SBGGR12_1X12 etc.
>
Hi Eugen,

My Hw testing setup currently does not support it, so I didn't add it.

>> + {
>> + /* RGB 565 */
>> + .code = MEDIA_BUS_FMT_RGB565_2X8_BE,
>> + .depth = 16,
>> + },
>> + {
>> + /* BGR 565 */
>> + .code = MEDIA_BUS_FMT_RGB565_2X8_LE,
>> + .depth = 16,
>> + },
>> + {
>> + /* RGB 888 */
>> + .code = MEDIA_BUS_FMT_RGB888_2X12_LE,
>> + .depth = 24,
>> + },
>> + {
>> + /* BGR 888 */
>> + .code = MEDIA_BUS_FMT_RGB888_2X12_BE,
>> + .depth = 24,
>> + },
>> +};
>
> [snip]
>
>> +
>> +void dw_mipi_csi_set_ipi_fmt(struct mipi_csi_dev *csi_dev)
>> +{
>> + struct device *dev = csi_dev->dev;
>> +
>> + if (csi_dev->ipi_dt)
>> + dw_mipi_csi_write(csi_dev, reg.IPI_DATA_TYPE, csi_dev->ipi_dt);
>> + else {
>> + switch (csi_dev->fmt->code) {
>> + case MEDIA_BUS_FMT_RGB565_2X8_BE:
>> + case MEDIA_BUS_FMT_RGB565_2X8_LE:
>> + dw_mipi_csi_write(csi_dev,
>> + reg.IPI_DATA_TYPE, CSI_2_RGB565);
>> + dev_dbg(dev, "DT: RGB 565");
>> + break;
>> +
>> + case MEDIA_BUS_FMT_RGB888_2X12_LE:
>> + case MEDIA_BUS_FMT_RGB888_2X12_BE:
>> + dw_mipi_csi_write(csi_dev,
>> + reg.IPI_DATA_TYPE, CSI_2_RGB888);
>> + dev_dbg(dev, "DT: RGB 888");
>> + break;
>> + case MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE:
>> + dw_mipi_csi_write(csi_dev,
>> + reg.IPI_DATA_TYPE, CSI_2_RAW10);
>> + dev_dbg(dev, "DT: RAW 10");
>> + break;
>> + case MEDIA_BUS_FMT_SBGGR8_1X8:
>> + dw_mipi_csi_write(csi_dev,
>> + reg.IPI_DATA_TYPE, CSI_2_RAW8);
>> + dev_dbg(dev, "DT: RAW 8");
>> + break;
>
> Same here, in CSI_2_RAW12 case it will default to a RGB565 case.
>
> Thanks,
>
> Eugen
>
>
I will try to add the support for this data type in my next patchset if not I
will flag it as unsupported for now in the commit message and code.

Thanks for your review,
Luis

>
>> + default:
>> + dw_mipi_csi_write(csi_dev,
>> + reg.IPI_DATA_TYPE, CSI_2_RGB565);
>> + dev_dbg(dev, "Error");
>> + break;
>> + }
>> + }
>> +}
>> +
>
> [snip]
>