linux-kernel - [PATCH v4 3/4] drm/msm/dpu: avoid unnecessary check in DPU reservations

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Message-Id: <1676286704-818-4-git-send-email-quic_kalyant@quicinc.com>
Date:   Mon, 13 Feb 2023 03:11:43 -0800
From:   Kalyan Thota <quic_kalyant@...cinc.com>
To:     dri-devel@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org
Cc:     Kalyan Thota <quic_kalyant@...cinc.com>,
        linux-kernel@...r.kernel.org, robdclark@...omium.org,
        dianders@...omium.org, swboyd@...omium.org,
        quic_vpolimer@...cinc.com, dmitry.baryshkov@...aro.org,
        quic_abhinavk@...cinc.com, marijn.suijten@...ainline.org
Subject: [PATCH v4 3/4] drm/msm/dpu: avoid unnecessary check in DPU reservations

Return immediately on failure, this will make dpu reservations
part look cleaner.

Signed-off-by: Kalyan Thota <quic_kalyant@...cinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 23 ++++++++++-------------
 1 file changed, 10 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 46d2a5c..3920efd 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -636,25 +636,22 @@ static int dpu_encoder_virt_atomic_check(
 		if (ret) {
 			DPU_ERROR_ENC(dpu_enc,
 					"mode unsupported, phys idx %d\n", i);
-			break;
+			return ret;
 		}
 	}
 
 	topology = dpu_encoder_get_topology(dpu_enc, dpu_kms, adj_mode, crtc_state);
 
-	/* Reserve dynamic resources now. */
-	if (!ret) {
-		/*
-		 * Release and Allocate resources on every modeset
-		 * Dont allocate when active is false.
-		 */
-		if (drm_atomic_crtc_needs_modeset(crtc_state)) {
-			dpu_rm_release(global_state, drm_enc);
+	/*
+	 * Release and Allocate resources on every modeset
+	 * Dont allocate when active is false.
+	 */
+	if (drm_atomic_crtc_needs_modeset(crtc_state)) {
+		dpu_rm_release(global_state, drm_enc);
 
-			if (!crtc_state->active_changed || crtc_state->active)
-				ret = dpu_rm_reserve(&dpu_kms->rm, global_state,
-						drm_enc, crtc_state, topology);
-		}
+		if (!crtc_state->active_changed || crtc_state->active)
+			ret = dpu_rm_reserve(&dpu_kms->rm, global_state,
+					drm_enc, crtc_state, topology);
 	}
 
 	trace_dpu_enc_atomic_check_flags(DRMID(drm_enc), adj_mode->flags);
-- 
2.7.4