[PATCH dev-5.1 4/4] media: aspeed: add a workaround to fix asilicon bug (Jae Hyun Yoo)

[Jae Hyun Yoo]

Hi Xiuzhi,

Thanks a lot for sharing the test result. Please let us update if you
find any issue in the further test.

Regards,
Jae

On 6/1/2019 7:46 PM, xiuzhi wrote:
> Hi Jae,
>      This new  patch works very well so far,
>   I will test it more cases next week.
> Best,
> xiuzhi
> 
> 
> ------------------ Original ------------------
> *From: * "jae.hyun.yoo";<jae.hyun.yoo at linux.intel.com>;
> *Date: * Jun 1, 2019
> *To: * "xiuzhi"<1450335857 at qq.com>; "openbmc"<openbmc at lists.ozlabs.org>; 
> "eajames"<eajames at linux.ibm.com>; "joel"<joel at jms.id.au>; 
> "andrew"<andrew at aj.id.au>;
> *Subject: * Re: [PATCH dev-5.1 4/4] media: aspeed: add a workaround to 
> fix asilicon bug (Jae Hyun Yoo)
> 
> On 5/31/2019 4:21 AM, xiuzhi wrote:
>  > Hi  Jae,
>  >     I tested this patch ,it works on 1680*1050,but I found an issue:
>  >
>  > The ikvm webpage will be black screen when you reboot the host after
>  > switching solution between 1680*1050 and 800*600 on chrome browser (my
>  > chrome version is 65).
>  > you can reproduce it:
>  > 1, Set host screen solution to 1680*1050 and save it . ikvm webpage works
>  > 2,Set host screen solution to 800*600 and save it. ikvm webpage works
>  > 3,Reset host screen solution to   1680*1050 and save it,
>  > 4,reboot the host,
>  > 5, the ikvm webpage is black screen when boot to Centos GUI
> 
> Hi Xiuzhi,
> 
> Checked that the issue isn't related this patch. Actually, that is
> caused by the first patch of this patch series. Since the patch removes
> source buffer allocation before mode detection, remaining allocation
> logic should be changed accordingly, otherwise it can't allocate buffers
> and eventually causes the issue. I'll fix the first patch in the next
> spin. In the meantime, you can apply below quick fix on top of what you
> tested the issue.
> 
> Thanks,
> Jae
> 
> 
> diff --git a/drivers/media/platform/aspeed-video.c
> b/drivers/media/platform/aspeed-video.c
> index c2d4a2e6f20f..034f2f436d76 100644
> --- a/drivers/media/platform/aspeed-video.c
> +++ b/drivers/media/platform/aspeed-video.c
> @@ -865,20 +865,14 @@ static void aspeed_video_set_resolution(struct
> aspeed_video *video)
> 
>           size *= 4;
> 
> -       if (size == video->srcs[0].size / 2) {
> -               aspeed_video_write(video, VE_SRC1_ADDR,
> -                                  video->srcs[0].dma + size);
> -       } else if (size == video->srcs[0].size) {
> -               if (!aspeed_video_alloc_buf(video, &video->srcs[1], size))
> -                       goto err_mem;
> -
> -               aspeed_video_write(video, VE_SRC1_ADDR, video->srcs[1].dma);
> -       } else {
> -               aspeed_video_free_buf(video, &video->srcs[0]);
> +       if (size != video->srcs[0].size) {
> +               if (video->srcs[0].size)
> +                       aspeed_video_free_buf(video, &video->srcs[0]);
> +               if (video->srcs[1].size)
> +                       aspeed_video_free_buf(video, &video->srcs[1]);
> 
>                   if (!aspeed_video_alloc_buf(video, &video->srcs[0], size))
>                           goto err_mem;
> -
>                   if (!aspeed_video_alloc_buf(video, &video->srcs[1], size))
>                           goto err_mem;
>