From: Ayan Halder <ayan.halder@arm.com>
Date: Tue, 19 Dec 2017 16:20:16 +0000
Subject: drm: mali-dp: Fix bug on scaling with rotation
Git-commit: 6cc3a505dcd60894a3ecefcbb40058873924bcf0
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

In the case, when the user wants to scale and rotate a layer by 90/270
degrees, the scaling engine input dimensions' parameters ie width and
height needs to be swapped with respect to the layer's input dimensions.
This means scaling engine input height should be set to layer's input
width and scaling engine input width should be set to
layer's input height.

Signed-off-by: Ayan Halder <ayan.halder@arm.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/arm/malidp_crtc.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/arm/malidp_crtc.c
+++ b/drivers/gpu/drm/arm/malidp_crtc.c
@@ -288,8 +288,14 @@ static int malidp_crtc_atomic_check_scal
 		s->enhancer_enable = ((h_upscale_factor >> 16) >= 2 ||
 				      (v_upscale_factor >> 16) >= 2);
 
-		s->input_w = pstate->src_w >> 16;
-		s->input_h = pstate->src_h >> 16;
+		if (pstate->rotation & MALIDP_ROTATED_MASK) {
+			s->input_w = pstate->src_h >> 16;
+			s->input_h = pstate->src_w >> 16;
+		} else {
+			s->input_w = pstate->src_w >> 16;
+			s->input_h = pstate->src_h >> 16;
+		}
+
 		s->output_w = pstate->crtc_w;
 		s->output_h = pstate->crtc_h;