linux-kernel - Re: [PATCH v5 2/2] drm: bridge: Add TI tmds181 and sn65dp159 driver

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Message-ID: <202509110339.t9spKBAI-lkp@intel.com>
Date: Thu, 11 Sep 2025 03:35:19 +0800
From: kernel test robot <lkp@...el.com>
To: Mike Looijmans <mike.looijmans@...ic.nl>,
	dri-devel@...ts.freedesktop.org
Cc: oe-kbuild-all@...ts.linux.dev, Mike Looijmans <mike.looijmans@...ic.nl>,
	Andrzej Hajda <andrzej.hajda@...el.com>,
	David Airlie <airlied@...il.com>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	Jonas Karlman <jonas@...boo.se>,
	Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Robert Foss <rfoss@...nel.org>, Simona Vetter <simona@...ll.ch>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 2/2] drm: bridge: Add TI tmds181 and sn65dp159 driver

Hi Mike,

kernel test robot noticed the following build errors:

[auto build test ERROR on 53e760d8949895390e256e723e7ee46618310361]

url:    https://github.com/intel-lab-lkp/linux/commits/Mike-Looijmans/dt-bindings-drm-bridge-ti-tmds181-Add-TI-TMDS181-and-SN65DP159-bindings/20250908-141752
base:   53e760d8949895390e256e723e7ee46618310361
patch link:    https://lore.kernel.org/r/20250908061605.76787-3-mike.looijmans%40topic.nl
patch subject: [PATCH v5 2/2] drm: bridge: Add TI tmds181 and sn65dp159 driver
config: i386-randconfig-013-20250910 (https://download.01.org/0day-ci/archive/20250911/202509110339.t9spKBAI-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250911/202509110339.t9spKBAI-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/202509110339.t9spKBAI-lkp@intel.com/

All errors (new ones prefixed by >>):

   ld: drivers/gpu/drm/bridge/ti-tmds181.o: in function `tmds181_mode_valid':
>> drivers/gpu/drm/bridge/ti-tmds181.c:118:(.text+0x2e): undefined reference to `drm_hdmi_compute_mode_clock'


vim +118 drivers/gpu/drm/bridge/ti-tmds181.c

   111	
   112	static enum drm_mode_status
   113	tmds181_mode_valid(struct drm_bridge *bridge, const struct drm_display_info *info,
   114			   const struct drm_display_mode *mode)
   115	{
   116		unsigned long long rate;
   117	
 > 118		rate = drm_hdmi_compute_mode_clock(mode, 8, HDMI_COLORSPACE_RGB);
   119	
   120		/* Minimum clock rate is 25MHz */
   121		if (rate < 25000000)
   122			return MODE_CLOCK_LOW;
   123	
   124		/*
   125		 * When in HDMI 2 mode, the clock is 1/40th of the bitrate. The limit is
   126		 * then the data rate of 6Gbps, which would use a 600MHz pixel clock.
   127		 */
   128		if (rate > 600000000)
   129			return MODE_CLOCK_HIGH;
   130	
   131		return MODE_OK;
   132	}
   133	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki