This global value allows userspace know when PSR is enabled.
This will allow userspace emit more busy_ioctl when doing directly copy_area
operations through scanout allowing forced psr exit.
v2: Check for PSR enabled instead of active. (by Chris Wilson)
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi at gmail.com>
---
drivers/gpu/drm/i915/i915_dma.c | 4 ++++
include/uapi/drm/i915_drm.h | 1 +
2 files changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index adb319b..f924388 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1000,6 +1000,10 @@ static int i915_getparam(struct drm_device *dev, void *data,
case I915_PARAM_HAS_EXEC_HANDLE_LUT:
value = 1;
break;
+ case I915_PARAM_PSR_ENABLED:
+ value = IS_HASWELL(dev) &&
+ I915_READ(EDP_PSR_CTL) & EDP_PSR_ENABLE;
+ break;
default:
DRM_DEBUG("Unknown parameter %d\n", param->param);
return -EINVAL;
diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
index 923ed7f..a5db73b 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -310,6 +310,7 @@ typedef struct drm_i915_irq_wait {
#define I915_PARAM_HAS_PINNED_BATCHES 24
#define I915_PARAM_HAS_EXEC_NO_RELOC 25
#define I915_PARAM_HAS_EXEC_HANDLE_LUT 26
+#define I915_PARAM_PSR_ENABLED 27
typedef struct drm_i915_getparam {
int param;
--
1.8.1.4
