linux-kernel - Re: [PATCH] gpu/drm: set gamma_lut or degamma_lut based on HW in setcmap

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Message-ID: <CAJvTgAg-8RYjo9Rapor86G5o10aTws7B1NmZVuN64KRy5kjzWg@mail.gmail.com>
Date: Mon, 7 Oct 2024 21:53:43 +0530
From: Vamsi Krishna Brahmajosyula <vamsikrishna.brahmajosyula@...il.com>
To: kernel test robot <lkp@...el.com>
Cc: maarten.lankhorst@...ux.intel.com, mripard@...nel.org, tzimmermann@...e.de, 
	airlied@...il.com, simona@...ll.ch, oe-kbuild-all@...ts.linux.dev, 
	skhan@...uxfoundation.org, dri-devel@...ts.freedesktop.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] gpu/drm: set gamma_lut or degamma_lut based on HW in setcmap_atomic

On Sun, Oct 6, 2024 at 6:31 AM kernel test robot <lkp@...el.com> wrote:
>
> Hi Vamsi,
>
> kernel test robot noticed the following build errors:
>
> [auto build test ERROR on 7ec462100ef9142344ddbf86f2c3008b97acddbe]
>
> url:    https://github.com/intel-lab-lkp/linux/commits/Vamsi-Krishna-Brahmajosyula/gpu-drm-set-gamma_lut-or-degamma_lut-based-on-HW-in-setcmap_atomic/20241003-200835
> base:   7ec462100ef9142344ddbf86f2c3008b97acddbe
> patch link:    https://lore.kernel.org/r/20241003120655.53663-1-vamsikrishna.brahmajosyula%40gmail.com
> patch subject: [PATCH] gpu/drm: set gamma_lut or degamma_lut based on HW in setcmap_atomic
> config: x86_64-rhel-8.3 (https://download.01.org/0day-ci/archive/20241006/202410060802.Ln9ygpuY-lkp@intel.com/config)
> compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241006/202410060802.Ln9ygpuY-lkp@intel.com/reproduce)
>
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@...el.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202410060802.Ln9ygpuY-lkp@intel.com/
>
> All errors (new ones prefixed by >>, old ones prefixed by <<):
>
Based on the kernel bot compile failure I received,
> >> ERROR: modpost: "drm_mode_obj_find_prop_id" [drivers/gpu/drm/drm_kms_helper.ko] undefined!
I realised I can not use drm_mode_obj_find_prop_id in setcmap_atomic
(in atomic context).
I am exploring atomic functions which access gamma_lut and degamma_lut
via state.
I will send a v2 with a new approach.
>
> --
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki