linux-kernel - Re: [PATCH] drm/amd/display: fix mode scaling (RMX

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Fri, 18 Aug 2023 11:01:36 -0400
From:   Harry Wentland <harry.wentland@....com>
To:     Hamza Mahfooz <hamza.mahfooz@....com>,
        amd-gfx@...ts.freedesktop.org
Cc:     Rodrigo Siqueira <rodrigo.siqueira@....com>,
        Leo Li <sunpeng.li@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        "Pan, Xinhui" <Xinhui.Pan@....com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Qingqing Zhuo <qingqing.zhuo@....com>,
        Aurabindo Pillai <aurabindo.pillai@....com>,
        Hersen Wu <hersenxs.wu@....com>,
        Srinivasan Shanmugam <srinivasan.shanmugam@....com>,
        Stylon Wang <stylon.wang@....com>,
        Wayne Lin <wayne.lin@....com>, Alan Liu <haoping.liu@....com>,
        Joshua Ashton <joshua@...ggi.es>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/amd/display: fix mode scaling (RMX_.*)



On 2023-08-18 09:17, Hamza Mahfooz wrote:
> As made mention of in commit 4a2df0d1f28e ("drm/amd/display: Fixed
> non-native modes not lighting up"), we shouldn't call
> drm_mode_set_crtcinfo() once the crtc timings have been decided. Since,
> it can cause settings to be unintentionally overwritten. So, since
> dm_state is never NULL now, we can use old_stream to determine if we
> should call drm_mode_set_crtcinfo() because we only need to set the crtc
> timing parameters for entirely new streams.
> 
> Cc: Harry Wentland <harry.wentland@....com>
> Cc: Rodrigo Siqueira <rodrigo.siqueira@....com>
> Fixes: 712237a4a1b4 ("drm/amd/display: Always set crtcinfo from create_stream_for_sink")
> Signed-off-by: Hamza Mahfooz <hamza.mahfooz@....com>

Reviewed-by: Harry Wentland <harry.wentland@....com>

Harry

> ---
>  drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> index 3b27b7742854..e9aff5014e39 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> @@ -6035,7 +6035,7 @@ create_stream_for_sink(struct amdgpu_dm_connector *aconnector,
>  
>  	if (recalculate_timing)
>  		drm_mode_set_crtcinfo(&saved_mode, 0);
> -	else
> +	else if (!old_stream)
>  		drm_mode_set_crtcinfo(&mode, 0);
>  
>  	/*