In LNL onwards, FBC can be associated to the first three planes.
FBC will be enabled on planes first come first served basis
until the userspace can select one of these FBC capable plane
explicitly. FBC can be supported in planes with per pixel alpha
v2:
- avoid fbc->state.plane check in intel_fbc_check_plane (Ville)
- simplify plane binding register writes (Matt)
- Update the subject to reflect that fbc can be enabled only in
the first three planes (Matt)
Bspec: 69560
Signed-off-by: Vinod Govindapillai <vinod.govindapillai@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_fbc.c | 7 ++++++-
drivers/gpu/drm/i915/display/skl_universal_plane.c | 5 ++++-
drivers/gpu/drm/i915/i915_reg.h | 1 +
3 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index 66c8aed07bbc..f1537bb63775 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -660,6 +660,10 @@ static u32 ivb_dpfc_ctl(struct intel_fbc *fbc)
if (IS_IVYBRIDGE(i915))
dpfc_ctl |= DPFC_CTL_PLANE_IVB(fbc_state->plane->i9xx_plane);
+ if (DISPLAY_VER(i915) >= 20)
+ dpfc_ctl |= REG_FIELD_PREP(DPFC_CTL_PLANE_BINDING_MASK,
+ fbc_state->plane->id);
+
if (fbc_state->fence_id >= 0)
dpfc_ctl |= DPFC_CTL_FENCE_EN_IVB;
@@ -1206,7 +1210,8 @@ static int intel_fbc_check_plane(struct intel_atomic_state *state,
return 0;
}
- if (plane_state->hw.pixel_blend_mode != DRM_MODE_BLEND_PIXEL_NONE &&
+ if (DISPLAY_VER(i915) < 20 &&
+ plane_state->hw.pixel_blend_mode != DRM_MODE_BLEND_PIXEL_NONE &&
fb->format->has_alpha) {
plane_state->no_fbc_reason = "per-pixel alpha not supported";
return 0;
diff --git a/drivers/gpu/drm/i915/display/skl_universal_plane.c b/drivers/gpu/drm/i915/display/skl_universal_plane.c
index 4d01c7ae4485..1291351c9941 100644
--- a/drivers/gpu/drm/i915/display/skl_universal_plane.c
+++ b/drivers/gpu/drm/i915/display/skl_universal_plane.c
@@ -1962,7 +1962,10 @@ static bool skl_plane_has_fbc(struct drm_i915_private *dev_priv,
if ((DISPLAY_RUNTIME_INFO(dev_priv)->fbc_mask & BIT(fbc_id)) == 0)
return false;
- return plane_id == PLANE_PRIMARY;
+ if (DISPLAY_VER(dev_priv) >= 20)
+ return plane_id <= PLANE_SPRITE1;
+ else
+ return plane_id == PLANE_PRIMARY;
}
static struct intel_fbc *skl_plane_fbc(struct drm_i915_private *dev_priv,
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index aefad14ab27a..aadcc630cb52 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -1327,6 +1327,7 @@
#define DPFC_CTL_PLANE_IVB(i9xx_plane) REG_FIELD_PREP(DPFC_CTL_PLANE_MASK_IVB, (i9xx_plane))
#define DPFC_CTL_FENCE_EN_IVB REG_BIT(28) /* ivb+ */
#define DPFC_CTL_PERSISTENT_MODE REG_BIT(25) /* g4x-snb */
+#define DPFC_CTL_PLANE_BINDING_MASK REG_GENMASK(12, 11) /* lnl */
#define DPFC_CTL_FALSE_COLOR REG_BIT(10) /* ivb+ */
#define DPFC_CTL_SR_EN REG_BIT(10) /* g4x only */
#define DPFC_CTL_SR_EXIT_DIS REG_BIT(9) /* g4x only */
--
2.34.1
