drm/i915: Add POWER_DOMAIN_VGA

VGA registers/memory live inside the the display power well. Add a power
domain for VGA.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_drv.h

@@ -99,6 +99,7 @@ enum intel_display_power_domain {
 	POWER_DOMAIN_TRANSCODER_B,
 	POWER_DOMAIN_TRANSCODER_C,
 	POWER_DOMAIN_TRANSCODER_EDP = POWER_DOMAIN_TRANSCODER_A + 0xF,
+	POWER_DOMAIN_VGA,
 };
 
 #define POWER_DOMAIN_PIPE(pipe) ((pipe) + POWER_DOMAIN_PIPE_A)

drivers/gpu/drm/i915/intel_pm.c

@@ -5283,6 +5283,7 @@ bool intel_display_power_enabled(struct drm_device *dev,
 	case POWER_DOMAIN_PIPE_A:
 	case POWER_DOMAIN_TRANSCODER_EDP:
 		return true;
+	case POWER_DOMAIN_VGA:
 	case POWER_DOMAIN_PIPE_B:
 	case POWER_DOMAIN_PIPE_C:
 	case POWER_DOMAIN_PIPE_A_PANEL_FITTER:
@@ -5371,6 +5372,7 @@ void intel_display_power_get(struct drm_device *dev,
 	case POWER_DOMAIN_PIPE_A:
 	case POWER_DOMAIN_TRANSCODER_EDP:
 		return;
+	case POWER_DOMAIN_VGA:
 	case POWER_DOMAIN_PIPE_B:
 	case POWER_DOMAIN_PIPE_C:
 	case POWER_DOMAIN_PIPE_A_PANEL_FITTER:
@@ -5401,6 +5403,7 @@ void intel_display_power_put(struct drm_device *dev,
 	case POWER_DOMAIN_PIPE_A:
 	case POWER_DOMAIN_TRANSCODER_EDP:
 		return;
+	case POWER_DOMAIN_VGA:
 	case POWER_DOMAIN_PIPE_B:
 	case POWER_DOMAIN_PIPE_C:
 	case POWER_DOMAIN_PIPE_A_PANEL_FITTER: