* add *very* preliminary dpms support

we will need to query the card dpms state
  for each monitor at a later date


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42829 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/accelerants/radeon_hd/accelerant.cpp

@@ -146,6 +146,9 @@ init_common(int device, bool isClone)
 	gInfo->is_clone = isClone;
 	gInfo->device = device;
 
+	gInfo->dpms_mode = B_DPMS_ON;
+		// initial state
+
 	// get basic info from driver
 
 	radeon_get_private_data data;

src/add-ons/accelerants/radeon_hd/accelerant.h

@@ -56,6 +56,8 @@ struct accelerant_info {
 
 	gpu_mc_info		*mc_info;		// used for last known mc state
 
+	volatile uint32	dpms_mode;		// current driver dpms mode
+
 	// LVDS panel mode passed from the bios/startup.
 	display_mode	lvds_panel_mode;
 };

src/add-ons/accelerants/radeon_hd/hooks.cpp

@@ -35,12 +35,10 @@ get_accelerant_hook(uint32 feature, void *data)
 		*/
 
 		/* DPMS */
-		/*
 		case B_DPMS_CAPABILITIES:
 			return (void*)radeon_dpms_capabilities;
 		case B_DPMS_MODE:
 			return (void*)radeon_dpms_mode;
-		*/
 		case B_SET_DPMS_MODE:
 			return (void*)radeon_dpms_set;
 

src/add-ons/accelerants/radeon_hd/mode.cpp

@@ -97,6 +97,23 @@ radeon_get_edid_info(void* info, size_t size, uint32* edid_version)
 }
 
 
+uint32
+radeon_dpms_capabilities(void)
+{
+	// These should be pretty universally supported on Radeon HD cards
+	return B_DPMS_ON | B_DPMS_STAND_BY | B_DPMS_SUSPEND | B_DPMS_OFF;
+}
+
+
+uint32
+radeon_dpms_mode(void)
+{
+	// TODO : this really isn't a good long-term solution
+	// we may need to look at the encoder dpms scratch registers
+	return gInfo->dpms_mode;
+}
+
+
 void
 radeon_dpms_set(int mode)
 {
@@ -128,6 +145,7 @@ radeon_dpms_set(int mode)
 			}
 			break;
 	}
+	gInfo->dpms_mode = mode;
 }
 
 

src/add-ons/accelerants/radeon_hd/mode.h

@@ -29,6 +29,8 @@
 status_t create_mode_list(void);
 bool is_mode_supported(display_mode* mode);
 status_t is_mode_sane(display_mode *mode);
+uint32 radeon_dpms_capabilities(void);
+uint32 radeon_dpms_mode(void);
 void radeon_dpms_set(int mode);