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SubjectRE: [PATCH] drm/amd/display: fix undefined struct member reference
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> -----Original Message-----
> From: Arnd Bergmann <arnd@arndb.de>
> Sent: 2019/December/10, Tuesday 3:31 PM
> To: Wentland, Harry <Harry.Wentland@amd.com>; Li, Sun peng (Leo)
> <Sunpeng.Li@amd.com>; Deucher, Alexander
> <Alexander.Deucher@amd.com>; Koenig, Christian
> <Christian.Koenig@amd.com>; Zhou, David(ChunMing)
> <David1.Zhou@amd.com>; David Airlie <airlied@linux.ie>; Daniel Vetter
> <daniel@ffwll.ch>; Liu, Zhan <Zhan.Liu@amd.com>
> Cc: Arnd Bergmann <arnd@arndb.de>; Laktyushkin, Dmytro
> <Dmytro.Laktyushkin@amd.com>; Lakha, Bhawanpreet
> <Bhawanpreet.Lakha@amd.com>; Lei, Jun <Jun.Lei@amd.com>; Liu,
> Charlene <Charlene.Liu@amd.com>; Yang, Eric <Eric.Yang2@amd.com>;
> Cornij, Nikola <Nikola.Cornij@amd.com>; amd-gfx@lists.freedesktop.org;
> dri-devel@lists.freedesktop.org; linux-kernel@vger.kernel.org
> Subject: [PATCH] drm/amd/display: fix undefined struct member reference
>
> An initialization was added for two optional struct members. One of these is
> always present in the dcn20_resource file, but the other one depends on
> CONFIG_DRM_AMD_DC_DSC_SUPPORT and causes a build failure if that is
> missing:
>
> drivers/gpu/drm/amd/amdgpu/../display/dc/dcn20/dcn20_resource.c:926:1
> 4: error: excess elements in struct initializer [-Werror]
> .num_dsc = 5,
>
> Add another #ifdef around the assignment.
>
> Fixes: c3d03c5a196f ("drm/amd/display: Include num_vmid and num_dsc
> within NV14's resource caps")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Thank you for catching that 😊 On my side I kept that flag enabled all the time, so I didn't realize there was a warning hidden here.

Reviewed-by: Zhan Liu <zhan.liu@amd.com>

> ---
> drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
> b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
> index faab89d1e694..fdf93e6edf43 100644
> --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
> +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
> @@ -923,7 +923,9 @@ static const struct resource_caps res_cap_nv14 = {
> .num_dwb = 1,
> .num_ddc = 5,
> .num_vmid = 16,
> +#ifdef CONFIG_DRM_AMD_DC_DSC_SUPPORT
> .num_dsc = 5,
> +#endif
> };
>
> static const struct dc_debug_options debug_defaults_drv = {
> --
> 2.20.0

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