On 2014년 06월 02일 20:48, Andrzej Hajda wrote: > On 06/02/2014 12:42 PM, Andrzej Hajda wrote: >> On 06/02/2014 12:11 PM, Tomasz Figa wrote: >>> Hi Rahul, Andrzej, >>> >>> On 02.06.2014 11:42, Rahul Sharma wrote: >>>> On 2 June 2014 14:41, Andrzej Hajda <a.hajda@xxxxxxxxxxx> wrote: >>>>> Hi Rahul, >>>>> >>>>> On 05/28/2014 08:11 AM, Rahul Sharma wrote: >>>>>> System hangs when FIMD registers are accessed to disable >>>>>> hardware overlays. This is because of the clocks which are >>>>>> not enabled before register access. >>>>>> >>>>>> 'Hardware overlay disable' is cleaned from the FIMD probe. >>>>>> >>>>>> Signed-off-by: Rahul Sharma <rahul.sharma@xxxxxxxxxxx> >>>>> >>>>> This patch causes regression on some exynos4210-universal_c210 devices, >>>>> everything works expect colors are incorrect - it seems blue component >>>>> is very dark, almost black. >>>>> >>>> >>>> Oh.... Sorry for that. I did not see any problem on 5250/5420/5800. I do not >>>> have setup for 4210. Better we should revert this patch. >>>> >>>> Would you please help me by verifying the following patch on 4210? This >>>> is an alternate solution to the same problem. >>>> >>>> http://www.mail-archive.com/linux-samsung-soc@xxxxxxxxxxxxxxx/msg31426.html >>>> >>>> Thanks Andrej, for bringing it to notice. >>> >>> I don't see how this patch could introduce such regression, as all the >>> affected registers seem to be properly reconfigured in fimd_win_commit() >>> anyway. >>> >>> IMHO instead of reverting the patch, this issue should be investigated >>> and fixed properly. >>> >>> Best regards, >>> Tomasz >>> >> >> I am looking at the problem, it is quite strange as it happens only on >> one of two targets I have access to. Anyway it seems that something >> should be added to fimd initialization sequence if we want to remove hw >> accessing code from probe. > > The problem is that fimd does not clear unused windows. > Simple patch which helps: > > diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c > b/drivers/gpu/drm/exynos/exynos_drm_fimd.c > index 2ec634f..b58fce2 100644 > --- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c > +++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c > @@ -741,6 +741,8 @@ static void fimd_apply(struct exynos_drm_manager *mgr) > win_data = &ctx->win_data[i]; > if (win_data->enabled) > fimd_win_commit(mgr, i); > + else > + fimd_win_disable(mgr, i); > } > > fimd_commit(mgr); > > But I am not fully familiar with window management code, so I do not > know if it does not breaks other stuff. It looks good to me. Can you post it? Thanks, Inki Dae > > Regards > Andrzej > >> >> Regards >> Andrzej >> > > -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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