linux-kernel - Re: [PATCH v5 00/39] i.MX Media Driver

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Date:   Sun, 12 Mar 2017 21:26:41 -0700
From:   Steve Longerbeam <slongerbeam@...il.com>
To:     Russell King - ARM Linux <linux@...linux.org.uk>
Cc:     robh+dt@...nel.org, mark.rutland@....com, shawnguo@...nel.org,
        kernel@...gutronix.de, fabio.estevam@....com, mchehab@...nel.org,
        hverkuil@...all.nl, nick@...anahar.org, markus.heiser@...marIT.de,
        p.zabel@...gutronix.de, laurent.pinchart+renesas@...asonboard.com,
        bparrot@...com, geert@...ux-m68k.org, arnd@...db.de,
        sudipm.mukherjee@...il.com, minghsiu.tsai@...iatek.com,
        tiffany.lin@...iatek.com, jean-christophe.trotin@...com,
        horms+renesas@...ge.net.au, niklas.soderlund+renesas@...natech.se,
        robert.jarzmik@...e.fr, songjun.wu@...rochip.com,
        andrew-ct.chen@...iatek.com, gregkh@...uxfoundation.org,
        shuah@...nel.org, sakari.ailus@...ux.intel.com, pavel@....cz,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org,
        devel@...verdev.osuosl.org,
        Steve Longerbeam <steve_longerbeam@...tor.com>
Subject: Re: [PATCH v5 00/39] i.MX Media Driver



On 03/12/2017 01:22 PM, Russell King - ARM Linux wrote:
> On Sun, Mar 12, 2017 at 01:05:06PM -0700, Steve Longerbeam wrote:
>>
>>
>> On 03/12/2017 12:57 PM, Russell King - ARM Linux wrote:
>>> On Sat, Mar 11, 2017 at 04:30:53PM -0800, Steve Longerbeam wrote:
>>>> If it's too difficult to get the imx219 csi-2 transmitter into the
>>>> LP-11 state on power on, perhaps the csi-2 receiver can be a little
>>>> more lenient on the transmitter and make the LP-11 timeout a warning
>>>> instead of error-out.
>>>>
>>>> Can you try the attached change on top of the version 5 patchset?
>>>>
>>>> If that doesn't work then you're just going to have to fix the bug
>>>> in imx219.
>>>
>>> That patch gets me past that hurdle, only to reveal that there's another
>>> issue:
>>
>> Yeah, ipu_cpmem_set_image() failed because it doesn't recognize the
>> bayer formats. Wait, didn't we fix this already? I've lost track.
>> Ah, right, we were going to move this support into the IPUv3 driver,
>> but in the meantime I think you had some patches to get around this.
>
> What I had was this patch for your v3.  I never got to testing your
> v4 because of the LP-11 problem.
>
> In v5, you've changed to propagate the ipu_cpmem_set_image() error
> code to avoid the resulting corruption, but that leaves the other bits
> of this patch unaddressed, along my "media: imx: smfc: add support
> for bayer formats" patch.
>
> Your driver basically has no support for bayer formats.

You added the patches to this driver that adds the bayer support,
I don't think there is anything more required of the driver at this
point to support bayer, the remaining work needs to happen in the IPUv3
driver.

I'll see if I have time to write that patch to IPUv3, but it's simple,
in fact what you wrote below can be translate directly into
ipu_cpmem_set_image(). There's a few other places bayer needs to be
treated in IPUv3, but it should be obvious by grepping for the
reference to pixel formats.

Steve


>
> diff --git a/drivers/staging/media/imx/imx-smfc.c b/drivers/staging/media/imx/imx-smfc.c
> index 313732201a52..4351c0365cf4 100644
> --- a/drivers/staging/media/imx/imx-smfc.c
> +++ b/drivers/staging/media/imx/imx-smfc.c
> @@ -234,11 +234,6 @@ static void imx_smfc_setup_channel(struct imx_smfc_priv *priv)
>  	buf1 = imx_media_dma_buf_get_next_queued(priv->out_ring);
>  	priv->next = buf1;
>
> -	image.phys0 = buf0->phys;
> -	image.phys1 = buf1->phys;
> -	ipu_cpmem_set_image(priv->smfc_ch, &image);
> -
> -
>  	switch (image.pix.pixelformat) {
>  	case V4L2_PIX_FMT_SBGGR8:
>  	case V4L2_PIX_FMT_SGBRG8:
> @@ -247,6 +242,10 @@ static void imx_smfc_setup_channel(struct imx_smfc_priv *priv)
>  		burst_size = 8;
>  		passthrough = true;
>  		passthrough_bits = 8;
> +		ipu_cpmem_set_resolution(priv->smfc_ch, image.rect.width, image.rect.height);
> +		ipu_cpmem_set_stride(priv->smfc_ch, image.pix.bytesperline);
> +		ipu_cpmem_set_buffer(priv->smfc_ch, 0, buf0->phys);
> +		ipu_cpmem_set_buffer(priv->smfc_ch, 1, buf1->phys);
>  		break;
>
>  	case V4L2_PIX_FMT_SBGGR16:
> @@ -256,9 +255,17 @@ static void imx_smfc_setup_channel(struct imx_smfc_priv *priv)
>  		burst_size = 4;
>  		passthrough = true;
>  		passthrough_bits = 16;
> +		ipu_cpmem_set_resolution(priv->smfc_ch, image.rect.width, image.rect.height);
> +		ipu_cpmem_set_stride(priv->smfc_ch, image.pix.bytesperline);
> +		ipu_cpmem_set_buffer(priv->smfc_ch, 0, buf0->phys);
> +		ipu_cpmem_set_buffer(priv->smfc_ch, 1, buf1->phys);
>  		break;
>
>  	default:
> +		image.phys0 = buf0->phys;
> +		image.phys1 = buf1->phys;
> +		ipu_cpmem_set_image(priv->smfc_ch, &image);
> +
>  		burst_size = (outfmt->width & 0xf) ? 8 : 16;
>
>  		/*
>