linux-kernel - [PATCH 5/6] drm: msm: a6xx: use dev_pm_opp_set

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Message-Id: <1589453659-27581-6-git-send-email-smasetty@codeaurora.org>
Date:   Thu, 14 May 2020 16:24:18 +0530
From:   Sharat Masetty <smasetty@...eaurora.org>
To:     freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org
Cc:     dri-devel@...edesktop.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, jcrouse@...eaurora.org,
        georgi.djakov@...aro.org, mka@...omium.org,
        Sharat Masetty <smasetty@...eaurora.org>
Subject: [PATCH 5/6] drm: msm: a6xx: use dev_pm_opp_set_bw to set DDR bandwidth

This patches replaces the previously used static DDR vote and uses
dev_pm_opp_set_bw() to scale GPU->DDR bandwidth along with scaling
GPU frequency.

Signed-off-by: Sharat Masetty <smasetty@...eaurora.org>
---
 drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
index 2d8124b..79433d3 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
@@ -141,11 +141,7 @@ void a6xx_gmu_set_freq(struct msm_gpu *gpu, struct dev_pm_opp *opp)

 	gmu->freq = gmu->gpu_freqs[perf_index];

-	/*
-	 * Eventually we will want to scale the path vote with the frequency but
-	 * for now leave it at max so that the performance is nominal.
-	 */
-	icc_set_bw(gpu->icc_path, 0, MBps_to_icc(7216));
+	dev_pm_opp_set_bw(&gpu->pdev->dev, opp);
 }

 unsigned long a6xx_gmu_get_freq(struct msm_gpu *gpu)
--
2.7.4