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From:   Kalyan Thota <kalyan_t@codeaurora.org>
To:     dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org,
        freedreno@lists.freedesktop.org, devicetree@vger.kernel.org
Cc:     Kalyan Thota <kalyan_t@codeaurora.org>,
        linux-kernel@vger.kernel.org, robdclark@gmail.com,
        seanpaul@chromium.org, hoegsberg@chromium.org,
        dianders@chromium.org, mkrishn@codeaurora.org,
        travitej@codeaurora.org, nganji@codeaurora.org
Subject: [v1] drm/msm/dpu: Fix scale params in plane validation
Date:   Thu, 30 Jul 2020 19:08:56 +0530
Message-Id: <1596116336-23147-1-git-send-email-kalyan_t@codeaurora.org>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Plane validation uses an API drm_calc_scale which will
return src/dst value as a scale ratio.

when viewing the range on a scale the values should fall in as

Upscale ratio < Unity scale < Downscale ratio for src/dst formula

Fix the min and max scale ratios to suit the API accordingly.

Signed-off-by: Kalyan Thota <kalyan_t@codeaurora.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
index 6379fe1..e46dcb9 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
@@ -946,9 +946,9 @@ static int dpu_plane_atomic_check(struct drm_plane *plane,
 		crtc_state = drm_atomic_get_new_crtc_state(state->state,
 							   state->crtc);
 
-	min_scale = FRAC_16_16(1, pdpu->pipe_sblk->maxdwnscale);
+	min_scale = FRAC_16_16(1, pdpu->pipe_sblk->maxupscale);
 	ret = drm_atomic_helper_check_plane_state(state, crtc_state, min_scale,
-					  pdpu->pipe_sblk->maxupscale << 16,
+					  pdpu->pipe_sblk->maxdwnscale << 16,
 					  true, true);
 	if (ret) {
 		DPU_DEBUG_PLANE(pdpu, "Check plane state failed (%d)\n", ret);
-- 
1.9.1