linux-kernel - Re: [PATCH 3/3] drm/nuvoton: add MA35D1 display controller driver

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Message-ID: <202601281037.qP5gX0kK-lkp@intel.com>
Date: Wed, 28 Jan 2026 10:27:05 +0800
From: kernel test robot <lkp@...el.com>
To: Joey Lu <a0987203069@...il.com>, airlied@...il.com, simona@...ll.ch,
	maarten.lankhorst@...ux.intel.com, mripard@...nel.org,
	tzimmermann@...e.de, robh@...nel.org, krzk+dt@...nel.org,
	conor+dt@...nel.org
Cc: oe-kbuild-all@...ts.linux.dev, ychuang3@...oton.com, schung@...oton.com,
	yclu4@...oton.com, a0987203069@...il.com,
	linux-arm-kernel@...ts.infradead.org,
	dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] drm/nuvoton: add MA35D1 display controller driver

Hi Joey,

kernel test robot noticed the following build errors:

[auto build test ERROR on drm-misc/drm-misc-next]
[also build test ERROR on drm/drm-next]
[cannot apply to robh/for-next linus/master v6.19-rc7 next-20260127]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Joey-Lu/dt-bindings-display-nuvoton-add-MA35D1-DCU-binding/20260126-170258
base:   https://gitlab.freedesktop.org/drm/misc/kernel.git drm-misc-next
patch link:    https://lore.kernel.org/r/20260126085727.2568958-4-a0987203069%40gmail.com
patch subject: [PATCH 3/3] drm/nuvoton: add MA35D1 display controller driver
config: alpha-allyesconfig (https://download.01.org/0day-ci/archive/20260128/202601281037.qP5gX0kK-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260128/202601281037.qP5gX0kK-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/202601281037.qP5gX0kK-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/gpu/drm/nuvoton/ma35_drm.h:18,
                    from drivers/gpu/drm/nuvoton/ma35_plane.c:23:
   drivers/gpu/drm/nuvoton/ma35_plane.c: In function 'ma35_layer_blend_mode_select':
>> drivers/gpu/drm/nuvoton/ma35_plane.h:141:9: error: implicit declaration of function 'FIELD_PREP' [-Wimplicit-function-declaration]
     141 |         FIELD_PREP(MA35_SRC_BLENDING_MODE, MA35_ALPHA_BLEND_ONE)
         |         ^~~~~~~~~~
   drivers/gpu/drm/nuvoton/ma35_plane.c:177:24: note: in expansion of macro 'MA35_BLEND_MODE_SRC'
     177 |                 *reg = MA35_BLEND_MODE_SRC;
         |                        ^~~~~~~~~~~~~~~~~~~
--
   drivers/gpu/drm/nuvoton/ma35_crtc.c: In function 'ma35_crtc_atomic_enable':
>> drivers/gpu/drm/nuvoton/ma35_crtc.c:97:15: error: implicit declaration of function 'FIELD_PREP' [-Wimplicit-function-declaration]
      97 |         reg = FIELD_PREP(MA35_DISPLAY_TOTAL_MASK, mode->htotal) |
         |               ^~~~~~~~~~
   drivers/gpu/drm/nuvoton/ma35_crtc.c: In function 'ma35_crtc_get_scanout_position':
>> drivers/gpu/drm/nuvoton/ma35_crtc.c:228:17: error: implicit declaration of function 'FIELD_GET' [-Wimplicit-function-declaration]
     228 |         *hpos = FIELD_GET(MA35_DISPLAY_CURRENT_X, reg);
         |                 ^~~~~~~~~


vim +/FIELD_PREP +141 drivers/gpu/drm/nuvoton/ma35_plane.h

   137	
   138	/* configs for blend modes */
   139	#define MA35_BLEND_MODE_CLEAR	0
   140	#define MA35_BLEND_MODE_SRC	\
 > 141		FIELD_PREP(MA35_SRC_BLENDING_MODE, MA35_ALPHA_BLEND_ONE)
   142	#define MA35_BLEND_MODE_DST \
   143		FIELD_PREP(MA35_DST_BLENDING_MODE, MA35_ALPHA_BLEND_ONE)
   144	#define MA35_BLEND_MODE_SRC_OVER \
   145		(FIELD_PREP(MA35_SRC_BLENDING_MODE, MA35_ALPHA_BLEND_ONE) | \
   146		FIELD_PREP(MA35_DST_BLENDING_MODE, MA35_ALPHA_BLEND_INVERSED))
   147	#define MA35_BLEND_MODE_DST_OVER \
   148		(FIELD_PREP(MA35_SRC_BLENDING_MODE, MA35_ALPHA_BLEND_INVERSED) | \
   149		FIELD_PREP(MA35_DST_BLENDING_MODE, MA35_ALPHA_BLEND_ONE))
   150	#define MA35_BLEND_MODE_SRC_IN \
   151		FIELD_PREP(MA35_SRC_BLENDING_MODE, MA35_ALPHA_BLEND_NORMAL)
   152	#define MA35_BLEND_MODE_DST_IN \
   153		FIELD_PREP(MA35_DST_BLENDING_MODE, MA35_ALPHA_BLEND_NORMAL)
   154	#define MA35_BLEND_MODE_SRC_OUT \
   155		FIELD_PREP(MA35_SRC_BLENDING_MODE, MA35_ALPHA_BLEND_INVERSED)
   156	#define MA35_BLEND_MODE_DST_OUT \
   157		FIELD_PREP(MA35_DST_BLENDING_MODE, MA35_ALPHA_BLEND_INVERSED)
   158	#define MA35_BLEND_MODE_SRC_ATOP \
   159		(FIELD_PREP(MA35_SRC_BLENDING_MODE, MA35_ALPHA_BLEND_NORMAL) | \
   160		FIELD_PREP(MA35_DST_BLENDING_MODE, MA35_ALPHA_BLEND_INVERSED))
   161	#define MA35_BLEND_MODE_DST_ATOP \
   162		(FIELD_PREP(MA35_SRC_BLENDING_MODE, MA35_ALPHA_BLEND_INVERSED) | \
   163		FIELD_PREP(MA35_DST_BLENDING_MODE, MA35_ALPHA_BLEND_NORMAL))
   164	#define MA35_BLEND_MODE_XOR \
   165		(FIELD_PREP(MA35_SRC_BLENDING_MODE, MA35_ALPHA_BLEND_INVERSED) | \
   166		FIELD_PREP(MA35_DST_BLENDING_MODE, MA35_ALPHA_BLEND_INVERSED))
   167	

-- 
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https://github.com/intel/lkp-tests/wiki