drm/radeon: disable runtime pm in certain cases

If the platform does not support hybrid graphics or ATPX dGPU
power control.

bug: https://bugzilla.kernel.org/show_bug.cgi?id=51381Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

drivers/gpu/drm/radeon/radeon_device.c

@@ -104,6 +104,14 @@ static const char radeon_family_name[][16] = {
 	"LAST",
 };
 
+#if defined(CONFIG_VGA_SWITCHEROO)
+bool radeon_has_atpx_dgpu_power_cntl(void);
+bool radeon_is_atpx_hybrid(void);
+#else
+static inline bool radeon_has_atpx_dgpu_power_cntl(void) { return false; }
+static inline bool radeon_is_atpx_hybrid(void) { return false; }
+#endif
+
 #define RADEON_PX_QUIRK_DISABLE_PX  (1 << 0)
 #define RADEON_PX_QUIRK_LONG_WAKEUP (1 << 1)
 
@@ -160,6 +168,11 @@ static void radeon_device_handle_px_quirks(struct radeon_device *rdev)
 
 	if (rdev->px_quirk_flags & RADEON_PX_QUIRK_DISABLE_PX)
 		rdev->flags &= ~RADEON_IS_PX;
+
+	/* disable PX is the system doesn't support dGPU power control or hybrid gfx */
+	if (!radeon_is_atpx_hybrid() &&
+	    !radeon_has_atpx_dgpu_power_cntl())
+		rdev->flags &= ~RADEON_IS_PX;
 }
 
 /**