[PATCH v2 15/15] drm/i915/pfit: Allow downscaling on i966+

[Ville Syrjala <ville.syrjala@linux.intel.com>]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

The i965+ panel fitter supports downscaling. Allow it.

v2: Limit to <2.0 instead of <=2.0 (sashiko)

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_pfit.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_pfit.c b/drivers/gpu/drm/i915/display/intel_pfit.c
index 42d087b406e0..293ec2aae095 100644
--- a/drivers/gpu/drm/i915/display/intel_pfit.c
+++ b/drivers/gpu/drm/i915/display/intel_pfit.c
@@ -563,7 +563,10 @@ static int i9xx_pfit_check_scaling(const struct intel_crtc_state *crtc_state)
 	int hscale, vscale, max_scale;
 	struct drm_rect src;
 
-	max_scale = 0x10000;
+	if (DISPLAY_VER(display) >= 4)
+		max_scale = 0x20000 - 1;
+	else
+		max_scale = 0x10000;
 
 	drm_rect_init(&src, 0, 0, pipe_src_w << 16, pipe_src_h << 16);
 
-- 
2.55.0