[sailus-media-tree:v4l2-isp 20/25] drivers/media/platform/dreamchip/rppx1/rppx1_hist.c:158:26: error: implicit declaration of function 'FIELD_PREP'

tree:   git://linuxtv.org/sailus/media_tree.git v4l2-isp
head:   7abfe3e3b2e2ecba8132ae60033d4ea1238c1f1e
commit: fbc6568564c45d128e03e578c53b7e12f03214f0 [20/25] media: rppx1: hist: Add support histogram measurement
config: arc-allyesconfig (https://download.01.org/0day-ci/archive/20260729/[email protected]/config)
compiler: arc-linux-gcc (GCC) 16.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260729/[email protected]/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 <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/

All errors (new ones prefixed by >>):

   drivers/media/platform/dreamchip/rppx1/rppx1_hist.c: In function 'rppx1_hist_fill_params':
>> drivers/media/platform/dreamchip/rppx1/rppx1_hist.c:158:26: error: implicit declaration of function 'FIELD_PREP' [-Wimplicit-function-declaration]
     158 |         u32 sample_reg = FIELD_PREP(HIST_SAMPLE_RANGE_SAMPLE_SHIFT_MASK,
         |                          ^~~~~~~~~~


vim +/FIELD_PREP +158 drivers/media/platform/dreamchip/rppx1/rppx1_hist.c

    76	
    77	#define RPPX1_HIST_WEIGHT(v0, v1, v2, v3) \
    78		(((v0) & 0x1f) | (((v1) & 0x1f) << 8)  | \
    79		(((v2) & 0x1f) << 16) | \
    80		(((v3) & 0x1f) << 24))
    81	
    82	static int rppx1_hist_fill_params(struct rpp_module *mod,
    83					  const union rppx1_params_block *block,
    84					  rppx1_reg_write write, void *priv)
    85	{
    86		const struct rppx1_hist_params *cfg = &block->hist;
    87		u32 h_offs, v_offs, h_size, v_size;
    88	
    89		/* If the modules is disabled, simply bypass it. */
    90		if (cfg->header.flags & V4L2_ISP_PARAMS_FL_BLOCK_DISABLE) {
    91			write(priv, mod->base + HIST_MODE_REG,
    92			      HIST_MODE_HIST_MODE_DISABLE);
    93			return 0;
    94		}
    95	
    96		/* Select sample point */
    97		write(priv, mod->base + HIST_CHANNEL_SEL_REG,
    98		      cfg->channel_sel & HIST_CHANNEL_SEL_CHANNEL_SELECT_MASK);
    99	
   100		/*
   101		 * Configure the input subsampling.
   102		 *
   103		 * In Bayer mode the vertical and horizontal subsampling counters are
   104		 * only incremented for color channels selected by hist_mode.
   105		 */
   106		write(priv, mod->base + HIST_SUBSAMPLING_REG,
   107		      HIST_SUBSAMPLING_V_STEPSIZE(cfg->v_stepsize) |
   108		      HIST_SUBSAMPLING_H_STEP_INC(cfg->h_step_inc));
   109	
   110		/*
   111		 * Adjust and set measurement window to hardware limitations,
   112		 * - Offsets must be even.
   113		 * - Width and height must be even and divisible in 5 windows.
   114		 */
   115		h_offs = cfg->wnd.h_offs & 0x1ffe;
   116		v_offs = cfg->wnd.v_offs & 0x1ffe;
   117		h_size = cfg->wnd.h_size - cfg->wnd.h_size % 10;
   118		v_size = cfg->wnd.v_size - cfg->wnd.v_size % 10;
   119	
   120		write(priv, mod->base + HIST_H_OFFS_REG, h_offs);
   121		write(priv, mod->base + HIST_V_OFFS_REG, v_offs);
   122		write(priv, mod->base + HIST_H_SIZE_REG, h_size / 5);
   123		write(priv, mod->base + HIST_V_SIZE_REG, v_size / 5);
   124	
   125		/*
   126		 * Set last measurement line for ready interrupt. Ignore the value
   127		 * from the parameters as it is only useful for fast-channel switching.
   128		 */
   129		write(priv, mod->base + HIST_LAST_MEAS_LINE_REG, v_offs + v_size + 1);
   130	
   131		/* Set measurement window weights. */
   132		write(priv, mod->base + HIST_WEIGHT_00TO30_REG,
   133		      RPPX1_HIST_WEIGHT(cfg->weights[0], cfg->weights[1],
   134					cfg->weights[2], cfg->weights[3]));
   135		write(priv, mod->base + HIST_WEIGHT_40TO21_REG,
   136		      RPPX1_HIST_WEIGHT(cfg->weights[4], cfg->weights[5],
   137					cfg->weights[6], cfg->weights[7]));
   138		write(priv, mod->base + HIST_WEIGHT_31TO12_REG,
   139		      RPPX1_HIST_WEIGHT(cfg->weights[8], cfg->weights[9],
   140					cfg->weights[10], cfg->weights[11]));
   141		write(priv, mod->base + HIST_WEIGHT_22TO03_REG,
   142		      RPPX1_HIST_WEIGHT(cfg->weights[12], cfg->weights[13],
   143					cfg->weights[14], cfg->weights[15]));
   144		write(priv, mod->base + HIST_WEIGHT_13TO43_REG,
   145		      RPPX1_HIST_WEIGHT(cfg->weights[16], cfg->weights[17],
   146					cfg->weights[18], cfg->weights[19]));
   147		write(priv, mod->base + HIST_WEIGHT_04TO34_REG,
   148		      RPPX1_HIST_WEIGHT(cfg->weights[20], cfg->weights[21],
   149					cfg->weights[22], cfg->weights[23]));
   150		write(priv, mod->base + HIST_WEIGHT_44_REG,
   151		      RPPX1_HIST_WEIGHT(cfg->weights[24], 0, 0, 0));
   152	
   153		write(priv, mod->base + HIST_MODE_REG, cfg->mode);
   154		write(priv, mod->base + HIST_COEFF_R_REG, cfg->coeff[0]);
   155		write(priv, mod->base + HIST_COEFF_G_REG, cfg->coeff[1]);
   156		write(priv, mod->base + HIST_COEFF_B_REG, cfg->coeff[2]);
   157	
 > 158		u32 sample_reg = FIELD_PREP(HIST_SAMPLE_RANGE_SAMPLE_SHIFT_MASK,
   159					    cfg->sample_shift) |
   160				 FIELD_PREP(HIST_SAMPLE_RANGE_SAMPLE_OFFSET_MASK,
   161					    cfg->sample_offs);
   162		write(priv, mod->base + HIST_SAMPLE_RANGE_REG, sample_reg);
   163	
   164		write(priv, mod->base + HIST_FORCED_UPDATE_REG, 1);
   165	
   166		return 0;
   167	}
   168	

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