linux-kernel - Re: [v10,20/27] drm/connector: hdmi: Add Infoframes generation

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Date: Fri, 22 Mar 2024 05:53:07 +0800
From: Sui Jingfeng <sui.jingfeng@...ux.dev>
To: Maxime Ripard <mripard@...nel.org>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>,
 Daniel Vetter <daniel@...ll.ch>, Jonathan Corbet <corbet@....net>,
 Sandy Huang <hjc@...k-chips.com>, Heiko Stübner
 <heiko@...ech.de>, Chen-Yu Tsai <wens@...e.org>,
 Jernej Skrabec <jernej.skrabec@...il.com>,
 Samuel Holland <samuel@...lland.org>
Cc: Hans Verkuil <hverkuil@...all.nl>,
 Sebastian Wick <sebastian.wick@...hat.com>,
 Ville Syrjälä <ville.syrjala@...ux.intel.com>,
 dri-devel@...ts.freedesktop.org, linux-arm-kernel@...ts.infradead.org,
 linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org,
 linux-sunxi@...ts.linux.dev
Subject: Re: [v10,20/27] drm/connector: hdmi: Add Infoframes generation

Hi,


On 2024/3/21 23:29, Maxime Ripard wrote:
> Infoframes in KMS is usually handled by a bunch of low-level helpers
> that require quite some boilerplate for drivers. This leads to
> discrepancies with how drivers generate them, and which are actually
> sent.
>
> Now that we have everything needed to generate them in the HDMI
> connector state, we can generate them in our common logic so that
> drivers can simply reuse what we precomputed.
>
> Signed-off-by: Maxime Ripard <mripard@...nel.org>
> ---
>   drivers/gpu/drm/Kconfig                            |   1 +
>   drivers/gpu/drm/drm_atomic_state_helper.c          | 338 +++++++++++++++++++++
>   drivers/gpu/drm/drm_connector.c                    |  14 +
>   .../gpu/drm/tests/drm_atomic_state_helper_test.c   |   1 +
>   drivers/gpu/drm/tests/drm_connector_test.c         |  12 +
>   include/drm/drm_atomic_state_helper.h              |   8 +
>   include/drm/drm_connector.h                        | 109 +++++++
>   7 files changed, 483 insertions(+)
>
> diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
> index 16029435b750..3d3193c7aa5f 100644
> --- a/drivers/gpu/drm/Kconfig
> +++ b/drivers/gpu/drm/Kconfig
> @@ -97,10 +97,11 @@ config DRM_KUNIT_TEST
>   	  If in doubt, say "N".
>   
>   config DRM_KMS_HELPER
>   	tristate
>   	depends on DRM
> +	select DRM_DISPLAY_HDMI_HELPER

Should we select DRM_DISPLAY_HELPER here? Otherwise there will have some compile error
emerged with default config.


: drivers/gpu/drm/drm_atomic_state_helper.o: in function `drm_atomic_helper_connector_hdmi_check':
drm_atomic_state_helper.c:(.text+0x15e4): undefined reference to `drm_hdmi_avi_infoframe_colorimetry'
: drm_atomic_state_helper.c:(.text+0x15f0): undefined reference to `drm_hdmi_avi_infoframe_bars'
: drm_atomic_state_helper.c:(.text+0x1638): undefined reference to `drm_hdmi_infoframe_set_hdr_metadata'
make[2]: *** [scripts/Makefile.vmlinux:37: vmlinux] Error 1

make[1]: *** [/home/suijingfeng/UpStream/drm-tip/Makefile:1162: vmlinux] Error 2

make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:240: __sub-make] Error 2

>   	help
>   	  CRTC helpers for KMS drivers.
>   
>   config DRM_DEBUG_DP_MST_TOPOLOGY_REFS
>           bool "Enable refcount backtrace history in the DP MST helpers"

-- 
Best regards,
Sui