1267 static int check_gamma(struct drm_intel_overlay_attrs *attrs)  in check_gamma()  argument
1269 	if (!check_gamma_bounds(0, attrs->gamma0) ||  in check_gamma()
1270 	    !check_gamma_bounds(attrs->gamma0, attrs->gamma1) ||  in check_gamma()
1271 	    !check_gamma_bounds(attrs->gamma1, attrs->gamma2) ||  in check_gamma()
1272 	    !check_gamma_bounds(attrs->gamma2, attrs->gamma3) ||  in check_gamma()
1273 	    !check_gamma_bounds(attrs->gamma3, attrs->gamma4) ||  in check_gamma()
1274 	    !check_gamma_bounds(attrs->gamma4, attrs->gamma5) ||  in check_gamma()
1275 	    !check_gamma_bounds(attrs->gamma5, 0x00ffffff))  in check_gamma()
1278 	if (!check_gamma5_errata(attrs->gamma5))  in check_gamma()
1287 	struct drm_intel_overlay_attrs *attrs = data;  in intel_overlay_attrs()  local
1303 	if (!(attrs->flags & I915_OVERLAY_UPDATE_ATTRS)) {  in intel_overlay_attrs()
1304 		attrs->color_key  = overlay->color_key;  in intel_overlay_attrs()
1305 		attrs->brightness = overlay->brightness;  in intel_overlay_attrs()
1306 		attrs->contrast   = overlay->contrast;  in intel_overlay_attrs()
1307 		attrs->saturation = overlay->saturation;  in intel_overlay_attrs()
1310 			attrs->gamma0 = I915_READ(OGAMC0);  in intel_overlay_attrs()
1311 			attrs->gamma1 = I915_READ(OGAMC1);  in intel_overlay_attrs()
1312 			attrs->gamma2 = I915_READ(OGAMC2);  in intel_overlay_attrs()
1313 			attrs->gamma3 = I915_READ(OGAMC3);  in intel_overlay_attrs()
1314 			attrs->gamma4 = I915_READ(OGAMC4);  in intel_overlay_attrs()
1315 			attrs->gamma5 = I915_READ(OGAMC5);  in intel_overlay_attrs()
1318 		if (attrs->brightness < -128 || attrs->brightness > 127)  in intel_overlay_attrs()
1320 		if (attrs->contrast > 255)  in intel_overlay_attrs()
1322 		if (attrs->saturation > 1023)  in intel_overlay_attrs()
1325 		overlay->color_key  = attrs->color_key;  in intel_overlay_attrs()
1326 		overlay->brightness = attrs->brightness;  in intel_overlay_attrs()
1327 		overlay->contrast   = attrs->contrast;  in intel_overlay_attrs()
1328 		overlay->saturation = attrs->saturation;  in intel_overlay_attrs()
1340 		if (attrs->flags & I915_OVERLAY_UPDATE_GAMMA) {  in intel_overlay_attrs()
1349 			ret = check_gamma(attrs);  in intel_overlay_attrs()
1353 			I915_WRITE(OGAMC0, attrs->gamma0);  in intel_overlay_attrs()
1354 			I915_WRITE(OGAMC1, attrs->gamma1);  in intel_overlay_attrs()
1355 			I915_WRITE(OGAMC2, attrs->gamma2);  in intel_overlay_attrs()
1356 			I915_WRITE(OGAMC3, attrs->gamma3);  in intel_overlay_attrs()
1357 			I915_WRITE(OGAMC4, attrs->gamma4);  in intel_overlay_attrs()
1358 			I915_WRITE(OGAMC5, attrs->gamma5);  in intel_overlay_attrs()
1361 	overlay->color_key_enabled = (attrs->flags & I915_OVERLAY_DISABLE_DEST_COLORKEY) == 0;  in intel_overlay_attrs()