linux-kernel - Re: [PATCH v9 15/17] media: rkvdec: Add H264 support for the VDPU383 variant

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Message-ID: <202601211924.rqKS2Ihm-lkp@intel.com>
Date: Wed, 21 Jan 2026 22:27:14 +0800
From: kernel test robot <lkp@...el.com>
To: Detlev Casanova <detlev.casanova@...labora.com>,
	linux-kernel@...r.kernel.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	linux-media@...r.kernel.org,
	Detlev Casanova <detlev.casanova@...labora.com>,
	Ezequiel Garcia <ezequiel@...guardiasur.com.ar>,
	Heiko Stuebner <heiko@...ech.de>,
	Daniel Almeida <daniel.almeida@...labora.com>,
	Jonathan Corbet <corbet@....net>,
	Ricardo Ribalda <ribalda@...omium.org>,
	Hans Verkuil <hverkuil@...all.nl>, Yunke Cao <yunkec@...gle.com>,
	Hans de Goede <hansg@...nel.org>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Nicolas Dufresne <nicolas.dufresne@...labora.com>,
	Pavan Bobba <opensource206@...il.com>,
	Sakari Ailus <sakari.ailus@...ux.intel.com>,
	James Cowgill <james.cowgill@...ize.com>,
	linux-rockchip@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org, kernel@...labora.com,
	Jonas Karlman <jonas@...boo.se>,
	Diederik de Haas <didi.debian@...ow.org>
Subject: Re: [PATCH v9 15/17] media: rkvdec: Add H264 support for the VDPU383
 variant

Hi Detlev,

kernel test robot noticed the following build warnings:

[auto build test WARNING on rockchip/for-next]
[also build test WARNING on linuxtv-media-pending/master media-tree/master linus/master v6.19-rc6 next-20260120]
[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/Detlev-Casanova/media-uapi-HEVC-Add-v4l2_ctrl_hevc_ext_sps_-ls-t_rps-controls/20260121-071026
base:   https://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip.git for-next
patch link:    https://lore.kernel.org/r/20260120222018.404741-16-detlev.casanova%40collabora.com
patch subject: [PATCH v9 15/17] media: rkvdec: Add H264 support for the VDPU383 variant
config: loongarch-allmodconfig (https://download.01.org/0day-ci/archive/20260121/202601211924.rqKS2Ihm-lkp@intel.com/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260121/202601211924.rqKS2Ihm-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/202601211924.rqKS2Ihm-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/media/platform/rockchip/rkvdec/rkvdec-vdpu383-h264.c:485:12: warning: stack frame size (2064) exceeds limit (2048) in 'rkvdec_h264_run' [-Wframe-larger-than]
     485 | static int rkvdec_h264_run(struct rkvdec_ctx *ctx)
         |            ^
   1 warning generated.


vim +/rkvdec_h264_run +485 drivers/media/platform/rockchip/rkvdec/rkvdec-vdpu383-h264.c

   484	
 > 485	static int rkvdec_h264_run(struct rkvdec_ctx *ctx)
   486	{
   487		struct v4l2_h264_reflist_builder reflist_builder;
   488		struct rkvdec_dev *rkvdec = ctx->dev;
   489		struct rkvdec_h264_ctx *h264_ctx = ctx->priv;
   490		struct rkvdec_h264_run run;
   491		struct rkvdec_h264_priv_tbl *tbl = h264_ctx->priv_tbl.cpu;
   492		u32 timeout_threshold;
   493	
   494		rkvdec_h264_run_preamble(ctx, &run);
   495	
   496		/* Build the P/B{0,1} ref lists. */
   497		v4l2_h264_init_reflist_builder(&reflist_builder, run.decode_params,
   498					       run.sps, run.decode_params->dpb);
   499		v4l2_h264_build_p_ref_list(&reflist_builder, h264_ctx->reflists.p);
   500		v4l2_h264_build_b_ref_lists(&reflist_builder, h264_ctx->reflists.b0,
   501					    h264_ctx->reflists.b1);
   502	
   503		assemble_hw_scaling_list(&run, &tbl->scaling_list);
   504		assemble_hw_pps(ctx, &run);
   505		lookup_ref_buf_idx(ctx, &run);
   506		assemble_hw_rps(&reflist_builder, &run, &h264_ctx->reflists, &tbl->rps);
   507	
   508		config_registers(ctx, &run);
   509	
   510		rkvdec_run_postamble(ctx, &run.base);
   511	
   512		timeout_threshold = h264_ctx->regs.common.reg013_core_timeout_threshold;
   513		rkvdec_schedule_watchdog(rkvdec, timeout_threshold);
   514	
   515		/* Start decoding! */
   516		writel(timeout_threshold, rkvdec->link + VDPU383_LINK_TIMEOUT_THRESHOLD);
   517		writel(0, rkvdec->link + VDPU383_LINK_IP_ENABLE);
   518		writel(VDPU383_DEC_E_BIT, rkvdec->link + VDPU383_LINK_DEC_ENABLE);
   519	
   520		return 0;
   521	}
   522	

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