Re: [PATCH] gpu: ipu-v3: Fix BT1120 interlaced CCIR codes

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On 05/22/2018 01:07 PM, Philipp Zabel wrote:
> Hi Marek,
> 
> On Fri, 2018-05-18 at 18:21 +0200, Marek Vasut wrote:
>> On 05/18/2018 05:51 PM, Philipp Zabel wrote:
>>> Hi Marek,
>>>
>>> On Sat, 2018-04-07 at 15:04 +0200, Marek Vasut wrote:
>>>> The BT1120 interlaced CCIR codes are the same as BT656 ones
>>>> and different than BT656 progressive CCIR codes, fix this.
>>>
>>> thank you for the patch, and sorry for the delay.
>>>
>>>> Signed-off-by: Marek Vasut <marex@xxxxxxx>
>>>> Cc: Steve Longerbeam <steve_longerbeam@xxxxxxxxxx>
>>>> Cc: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
>>>> ---
>>>>  drivers/gpu/ipu-v3/ipu-csi.c | 8 ++++++--
>>>>  1 file changed, 6 insertions(+), 2 deletions(-)
>>>>
>>>> diff --git a/drivers/gpu/ipu-v3/ipu-csi.c b/drivers/gpu/ipu-v3/ipu-csi.c
>>>> index caa05b0702e1..301a729581ce 100644
>>>> --- a/drivers/gpu/ipu-v3/ipu-csi.c
>>>> +++ b/drivers/gpu/ipu-v3/ipu-csi.c
>>>> @@ -435,12 +435,16 @@ int ipu_csi_init_interface(struct ipu_csi *csi,
>>>>  		break;
>>>>  	case IPU_CSI_CLK_MODE_CCIR1120_PROGRESSIVE_DDR:
>>>>  	case IPU_CSI_CLK_MODE_CCIR1120_PROGRESSIVE_SDR:
>>>> -	case IPU_CSI_CLK_MODE_CCIR1120_INTERLACED_DDR:
>>>> -	case IPU_CSI_CLK_MODE_CCIR1120_INTERLACED_SDR:
>>>>  		ipu_csi_write(csi, 0x40030 | CSI_CCIR_ERR_DET_EN,
>>>>  				   CSI_CCIR_CODE_1);
>>>>  		ipu_csi_write(csi, 0xFF0000, CSI_CCIR_CODE_3);
>>>>  		break;
>>>> +	case IPU_CSI_CLK_MODE_CCIR1120_INTERLACED_DDR:
>>>> +	case IPU_CSI_CLK_MODE_CCIR1120_INTERLACED_SDR:
>>>> +		ipu_csi_write(csi, 0x40596 | CSI_CCIR_ERR_DET_EN, CSI_CCIR_CODE_1);
>>>> +		ipu_csi_write(csi, 0xD07DF, CSI_CCIR_CODE_2);
>>>> +		ipu_csi_write(csi, 0xFF0000, CSI_CCIR_CODE_3);
>>>
>>> If these are the same as BT656 codes (so this case would be for PAL?),
>>> could this just be moved up into the IPU_CSI_CLK_MODE_CCIR656_INTERLACED
>>> case? Would the NTSC CCIR codes be the same as well?
>>
>> Dunno, I don't have any NTSC device to test. But the above was tested
>> with a PAL device I had.
>>
>> I think the CCIR codes are different from BT656, although I might be wrong.
> 
> The driver currently has:
> 
>         case IPU_CSI_CLK_MODE_CCIR656_INTERLACED:
>                 if (mbus_fmt->width == 720 && mbus_fmt->height == 576) {
>                         /*
>                          * PAL case
>                          *
>                          * Field0BlankEnd = 0x6, Field0BlankStart = 0x2,
>                          * Field0ActiveEnd = 0x4, Field0ActiveStart = 0
>                          * Field1BlankEnd = 0x7, Field1BlankStart = 0x3,
>                          * Field1ActiveEnd = 0x5, Field1ActiveStart = 0x1
>                          */
>                         height = 625; /* framelines for PAL */
> 
>                         ipu_csi_write(csi, 0x40596 | CSI_CCIR_ERR_DET_EN,
>                                           CSI_CCIR_CODE_1);
>                         ipu_csi_write(csi, 0xD07DF, CSI_CCIR_CODE_2);
>                         ipu_csi_write(csi, 0xFF0000, CSI_CCIR_CODE_3);
>                 } else if (mbus_fmt->width == 720 && mbus_fmt->height == 480) {                           
>                         /*
>                          * NTSC case
>                          *
>                          * Field0BlankEnd = 0x7, Field0BlankStart = 0x3,
>                          * Field0ActiveEnd = 0x5, Field0ActiveStart = 0x1
>                          * Field1BlankEnd = 0x6, Field1BlankStart = 0x2,
>                          * Field1ActiveEnd = 0x4, Field1ActiveStart = 0
>                          */
>                         height = 525; /* framelines for NTSC */
> 
>                         ipu_csi_write(csi, 0xD07DF | CSI_CCIR_ERR_DET_EN,
>                                           CSI_CCIR_CODE_1);
>                         ipu_csi_write(csi, 0x40596, CSI_CCIR_CODE_2);
>                         ipu_csi_write(csi, 0xFF0000, CSI_CCIR_CODE_3);
>                 } else {
>                         dev_err(csi->ipu->dev,
>                                 "Unsupported CCIR656 interlaced video mode\n");
>                         spin_unlock_irqrestore(&csi->lock, flags);
>                         return -EINVAL;
>                 }
>                 break;
> 
> The PAL codes are exactly the same as in your patch. That's why I wonder
> whether we should just move
> 	case IPU_CSI_CLK_MODE_CCIR1120_INTERLACED_DDR:
> 	case IPU_CSI_CLK_MODE_CCIR1120_INTERLACED_SDR:
> up before
>         case IPU_CSI_CLK_MODE_CCIR656_INTERLACED:
> as follows:

Isn't the PAL code doing some sort of resolution check too ? Although
this would probably work in my case too.

> ----------8<----------
> diff --git a/drivers/gpu/ipu-v3/ipu-csi.c b/drivers/gpu/ipu-v3/ipu-csi.c
> index caa05b0702e1..7e96382f9cb1 100644
> --- a/drivers/gpu/ipu-v3/ipu-csi.c
> +++ b/drivers/gpu/ipu-v3/ipu-csi.c
> @@ -396,6 +396,8 @@ int ipu_csi_init_interface(struct ipu_csi *csi,
>                 ipu_csi_write(csi, 0xFF0000, CSI_CCIR_CODE_3);
>                 break;
>         case IPU_CSI_CLK_MODE_CCIR656_INTERLACED:
> +       case IPU_CSI_CLK_MODE_CCIR1120_INTERLACED_DDR:
> +       case IPU_CSI_CLK_MODE_CCIR1120_INTERLACED_SDR:
>                 if (mbus_fmt->width == 720 && mbus_fmt->height == 576) {
>                         /*
>                          * PAL case
> @@ -435,8 +437,6 @@ int ipu_csi_init_interface(struct ipu_csi *csi,
>                 break;
>         case IPU_CSI_CLK_MODE_CCIR1120_PROGRESSIVE_DDR:
>         case IPU_CSI_CLK_MODE_CCIR1120_PROGRESSIVE_SDR:
> -       case IPU_CSI_CLK_MODE_CCIR1120_INTERLACED_DDR:
> -       case IPU_CSI_CLK_MODE_CCIR1120_INTERLACED_SDR:
>                 ipu_csi_write(csi, 0x40030 | CSI_CCIR_ERR_DET_EN,
>                                    CSI_CCIR_CODE_1);
>                 ipu_csi_write(csi, 0xFF0000, CSI_CCIR_CODE_3);
> ---------->8----------
> 
> Does this work for you?

I cannot test this anymore, but maybe it'll help someone.

-- 
Best regards,
Marek Vasut



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