[PATCH v7 1/7] drm/i915/scaler: Add and compute scaling factors

[Mitul Golani <mitulkumar.ajitkumar.golani@intel.com>]

Add scaling factors to scaler_state for a particular scaler user.
These factors will be used later to compute scaler prefill latency.
Currently, only plane scaling factors are stored, but the same members
can later be extended to store pipe scaling factors as well.

--v2:
- Rephrase commit message. [Ankit]
- Corrects typos. [Ankit]

Signed-off-by: Mitul Golani <mitulkumar.ajitkumar.golani@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
---
 drivers/gpu/drm/i915/display/intel_display_types.h | 2 ++
 drivers/gpu/drm/i915/display/skl_scaler.c          | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 8271e50e3644..603f292996aa 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -711,6 +711,8 @@ struct intel_initial_plane_config {
 struct intel_scaler {
 	u32 mode;
 	bool in_use;
+	int hscale;
+	int vscale;
 };
 
 struct intel_crtc_scaler_state {
diff --git a/drivers/gpu/drm/i915/display/skl_scaler.c b/drivers/gpu/drm/i915/display/skl_scaler.c
index a11e09a15e23..67b86f6f62fc 100644
--- a/drivers/gpu/drm/i915/display/skl_scaler.c
+++ b/drivers/gpu/drm/i915/display/skl_scaler.c
@@ -434,6 +434,9 @@ static int intel_atomic_setup_scaler(struct intel_crtc_scaler_state *scaler_stat
 
 			return -EINVAL;
 		}
+
+		scaler_state->scalers[*scaler_id].hscale = hscale;
+		scaler_state->scalers[*scaler_id].vscale = vscale;
 	}
 
 	drm_dbg_kms(display->drm, "[CRTC:%d:%s] attached scaler id %u.%u to %s:%d\n",
-- 
2.48.1