27  * backlight through DP AUX can actually use two different interfaces: Intel's
28  * proprietary DP AUX backlight interface, and the standard VESA backlight
30  * advertise support for the standard VESA backlight interface when they
31  * don't properly support it. However, on these systems the Intel backlight
33  * usually just indicate that they use PWM backlight controls in their VBIOS
49  * DP AUX registers for Intel's proprietary HDR backlight interface. We define
113 /* Intel EDP backlight callbacks */
133 	drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] Detected %s HDR backlight interface version %d\n",  in intel_dp_aux_supports_hdr_backlight()
143 	 * do not use Intel proprietary eDP backlight control if we  in intel_dp_aux_supports_hdr_backlight()
153 …DR static metadata. Possible support for Intel HDR backlight interface is not used. If your backli…  in intel_dp_aux_supports_hdr_backlight()
159 	panel->backlight.edp.intel.sdr_uses_aux =  in intel_dp_aux_supports_hdr_backlight()
175 		drm_err(&i915->drm, "[CONNECTOR:%d:%s] Failed to read current backlight mode from DPCD\n",  in intel_dp_aux_hdr_get_backlight()
181 		if (!panel->backlight.edp.intel.sdr_uses_aux) {  in intel_dp_aux_hdr_get_backlight()
182 			u32 pwm_level = panel->backlight.pwm_funcs->get(connector, pipe);  in intel_dp_aux_hdr_get_backlight()
187 		/* Assume 100% brightness if backlight controls aren't enabled yet */  in intel_dp_aux_hdr_get_backlight()
188 		return panel->backlight.max;  in intel_dp_aux_hdr_get_backlight()
224 	if (panel->backlight.edp.intel.sdr_uses_aux) {  in intel_dp_aux_hdr_set_backlight()
248 		drm_err(&i915->drm, "[CONNECTOR:%d:%s] Failed to read current backlight control mode: %d\n",  in intel_dp_aux_hdr_enable_backlight()
254 	if (panel->backlight.edp.intel.sdr_uses_aux) {  in intel_dp_aux_hdr_enable_backlight()
260 		panel->backlight.pwm_funcs->enable(crtc_state, conn_state, pwm_level);  in intel_dp_aux_hdr_enable_backlight()
277 	/* Nothing to do for AUX based backlight controls */  in intel_dp_aux_hdr_disable_backlight()
278 	if (panel->backlight.edp.intel.sdr_uses_aux)  in intel_dp_aux_hdr_disable_backlight()
282 	panel->backlight.pwm_funcs->disable(conn_state, intel_backlight_invert_pwm_level(connector, 0));  in intel_dp_aux_hdr_disable_backlight()
299 	drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] SDR backlight is controlled through %s\n",  in intel_dp_aux_hdr_setup_backlight()
301 		    dpcd_vs_pwm_str(panel->backlight.edp.intel.sdr_uses_aux));  in intel_dp_aux_hdr_setup_backlight()
303 	if (!panel->backlight.edp.intel.sdr_uses_aux) {  in intel_dp_aux_hdr_setup_backlight()
304 		ret = panel->backlight.pwm_funcs->setup(connector, pipe);  in intel_dp_aux_hdr_setup_backlight()
307 				"[CONNECTOR:%d:%s] Failed to setup SDR backlight controls through PWM: %d\n",  in intel_dp_aux_hdr_setup_backlight()
314 		panel->backlight.max = luminance_range->max_luminance;  in intel_dp_aux_hdr_setup_backlight()
315 		panel->backlight.min = luminance_range->min_luminance;  in intel_dp_aux_hdr_setup_backlight()
317 		panel->backlight.max = 512;  in intel_dp_aux_hdr_setup_backlight()
318 		panel->backlight.min = 0;  in intel_dp_aux_hdr_setup_backlight()
321 …drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] Using AUX HDR interface for backlight control (range %d…  in intel_dp_aux_hdr_setup_backlight()
323 		    panel->backlight.min, panel->backlight.max);  in intel_dp_aux_hdr_setup_backlight()
326 	panel->backlight.level = intel_dp_aux_hdr_get_backlight(connector, pipe);  in intel_dp_aux_hdr_setup_backlight()
327 	panel->backlight.enabled = panel->backlight.level != 0;  in intel_dp_aux_hdr_setup_backlight()
332 /* VESA backlight callbacks */
335 	return connector->panel.backlight.level;  in intel_dp_aux_vesa_get_backlight()
345 	if (!panel->backlight.edp.vesa.info.aux_set) {  in intel_dp_aux_vesa_set_backlight()
351 	drm_edp_backlight_set_level(&intel_dp->aux, &panel->backlight.edp.vesa.info, level);  in intel_dp_aux_vesa_set_backlight()
362 	if (!panel->backlight.edp.vesa.info.aux_enable) {  in intel_dp_aux_vesa_enable_backlight()
365 		if (!panel->backlight.edp.vesa.info.aux_set)  in intel_dp_aux_vesa_enable_backlight()
369 								     panel->backlight.pwm_level_max);  in intel_dp_aux_vesa_enable_backlight()
371 		panel->backlight.pwm_funcs->enable(crtc_state, conn_state, pwm_level);  in intel_dp_aux_vesa_enable_backlight()
374 	drm_edp_backlight_enable(&intel_dp->aux, &panel->backlight.edp.vesa.info, level);  in intel_dp_aux_vesa_enable_backlight()
384 	drm_edp_backlight_disable(&intel_dp->aux, &panel->backlight.edp.vesa.info);  in intel_dp_aux_vesa_disable_backlight()
386 	if (!panel->backlight.edp.vesa.info.aux_enable)  in intel_dp_aux_vesa_disable_backlight()
387 		panel->backlight.pwm_funcs->disable(old_conn_state,  in intel_dp_aux_vesa_disable_backlight()
400 	ret = drm_edp_backlight_init(&intel_dp->aux, &panel->backlight.edp.vesa.info,  in intel_dp_aux_vesa_setup_backlight()
401 				     panel->vbt.backlight.pwm_freq_hz, intel_dp->edp_dpcd,  in intel_dp_aux_vesa_setup_backlight()
406 	drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] AUX VESA backlight enable is controlled through %s\n",  in intel_dp_aux_vesa_setup_backlight()
408 		    dpcd_vs_pwm_str(panel->backlight.edp.vesa.info.aux_enable));  in intel_dp_aux_vesa_setup_backlight()
409 	drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] AUX VESA backlight level is controlled through %s\n",  in intel_dp_aux_vesa_setup_backlight()
411 		    dpcd_vs_pwm_str(panel->backlight.edp.vesa.info.aux_set));  in intel_dp_aux_vesa_setup_backlight()
413 	if (!panel->backlight.edp.vesa.info.aux_set || !panel->backlight.edp.vesa.info.aux_enable) {  in intel_dp_aux_vesa_setup_backlight()
414 		ret = panel->backlight.pwm_funcs->setup(connector, pipe);  in intel_dp_aux_vesa_setup_backlight()
417 				"[CONNECTOR:%d:%s] Failed to setup PWM backlight controls for eDP backlight: %d\n",  in intel_dp_aux_vesa_setup_backlight()
423 	if (panel->backlight.edp.vesa.info.aux_set) {  in intel_dp_aux_vesa_setup_backlight()
424 		panel->backlight.max = panel->backlight.edp.vesa.info.max;  in intel_dp_aux_vesa_setup_backlight()
425 		panel->backlight.min = 0;  in intel_dp_aux_vesa_setup_backlight()
427 			panel->backlight.level = current_level;  in intel_dp_aux_vesa_setup_backlight()
428 			panel->backlight.enabled = panel->backlight.level != 0;  in intel_dp_aux_vesa_setup_backlight()
430 			panel->backlight.level = panel->backlight.max;  in intel_dp_aux_vesa_setup_backlight()
431 			panel->backlight.enabled = false;  in intel_dp_aux_vesa_setup_backlight()
434 		panel->backlight.max = panel->backlight.pwm_level_max;  in intel_dp_aux_vesa_setup_backlight()
435 		panel->backlight.min = panel->backlight.pwm_level_min;  in intel_dp_aux_vesa_setup_backlight()
437 			panel->backlight.level = panel->backlight.pwm_funcs->get(connector, pipe);  in intel_dp_aux_vesa_setup_backlight()
438 			panel->backlight.enabled = panel->backlight.pwm_enabled;  in intel_dp_aux_vesa_setup_backlight()
440 			panel->backlight.level = panel->backlight.max;  in intel_dp_aux_vesa_setup_backlight()
441 			panel->backlight.enabled = false;  in intel_dp_aux_vesa_setup_backlight()
445 	drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] Using AUX VESA interface for backlight control\n",  in intel_dp_aux_vesa_setup_backlight()
458 		drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] AUX Backlight Control Supported!\n",  in intel_dp_aux_supports_vesa_backlight()
496 		switch (panel->vbt.backlight.type) {  in intel_dp_aux_init_backlight_funcs()
508 		if (panel->vbt.backlight.type != INTEL_BACKLIGHT_VESA_EDP_AUX_INTERFACE)  in intel_dp_aux_init_backlight_funcs()
522 	 * Since Intel has their own backlight control interface, the majority of machines out there  in intel_dp_aux_init_backlight_funcs()
523 	 * using DPCD backlight controls with Intel GPUs will be using this interface as opposed to  in intel_dp_aux_init_backlight_funcs()
529 	 * interfaces, the VESA backlight interface will stop working once we've programmed the  in intel_dp_aux_init_backlight_funcs()
531 	 * backlight interface at all. This means that the only sensible way for us to detect both  in intel_dp_aux_init_backlight_funcs()
535 		drm_dbg_kms(dev, "[CONNECTOR:%d:%s] Using Intel proprietary eDP backlight controls\n",  in intel_dp_aux_init_backlight_funcs()
537 		panel->backlight.funcs = &intel_dp_hdr_bl_funcs;  in intel_dp_aux_init_backlight_funcs()
542 		drm_dbg_kms(dev, "[CONNECTOR:%d:%s] Using VESA eDP backlight controls\n",  in intel_dp_aux_init_backlight_funcs()
544 		panel->backlight.funcs = &intel_dp_vesa_bl_funcs;  in intel_dp_aux_init_backlight_funcs()