35 /* For 10 bit LUT layout, R/G/B are in the same register */
40 /* For 12 bit LUT layout, R/G are in LUT, B is in LUT1 */
90 static bool mtk_gamma_lut_is_descending(struct drm_color_lut *lut, u32 lut_size)  in mtk_gamma_lut_is_descending()  argument
95 	first = lut[0].red + lut[0].green + lut[0].blue;  in mtk_gamma_lut_is_descending()
96 	last = lut[last_entry].red + lut[last_entry].green + lut[last_entry].blue;  in mtk_gamma_lut_is_descending()
103  * always support (by HW) both 12-bits and 10-bits LUT but, on those, we
107  * - SoC HW support 9/10-bits LUT only
109  *     - 10-bits LUT supported
110  *     - 9-bits LUT not supported
111  * - SoC HW support both 10/12bits LUT
113  *     - 12-bits LUT supported
114  *     - 10-its LUT not supported
124 	struct drm_color_lut *lut;  in mtk_gamma_set()  local
127 	/* If there's no gamma lut there's nothing to do here. */  in mtk_gamma_set()
132 	lut = (struct drm_color_lut *)state->gamma_lut->data;  in mtk_gamma_set()
139 		/* Switch gamma bank and set data mode before writing LUT */  in mtk_gamma_set()
150 			hwlut.red = drm_color_lut_extract(lut[n].red, lut_bits);  in mtk_gamma_set()
151 			hwlut.green = drm_color_lut_extract(lut[n].green, lut_bits);  in mtk_gamma_set()
152 			hwlut.blue = drm_color_lut_extract(lut[n].blue, lut_bits);  in mtk_gamma_set()
165 				diff.red = lut[n].red - lut[n - 1].red;  in mtk_gamma_set()
168 				diff.green = lut[n].green - lut[n - 1].green;  in mtk_gamma_set()
171 				diff.blue = lut[n].blue - lut[n - 1].blue;  in mtk_gamma_set()
193 		/* Descending or Rising LUT */  in mtk_gamma_set()
194 		if (mtk_gamma_lut_is_descending(lut, gamma->data->lut_size - 1))  in mtk_gamma_set()