From: Nicolas Boichat <drinkcat@chromium.org>
To: Rob Herring <robh@kernel.org>,
Steven Price <steven.price@arm.com>,
Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Cc: hsinyi@chromium.org, hoegsberg@chromium.org, fshao@chromium.org,
boris.brezillon@collabora.com,
Nicolas Boichat <drinkcat@chromium.org>,
Daniel Vetter <daniel@ffwll.ch>, David Airlie <airlied@linux.ie>,
Tomeu Vizoso <tomeu.vizoso@collabora.com>,
dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Subject: [PATCH v6 3/4] drm/panfrost: devfreq: Disable devfreq when num_supplies > 1
Date: Tue, 5 Jan 2021 08:11:18 +0800 [thread overview]
Message-ID: <20210105081111.v6.3.I3af068abe30c9c85cabc4486385c52e56527a509@changeid> (raw)
In-Reply-To: <20210105001119.2129559-1-drinkcat@chromium.org>
GPUs with more than a single regulator (e.g. G-57 on MT8183) will
require platform-specific handling, disable devfreq for now.
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
---
Changes in v6:
- New change
drivers/gpu/drm/panfrost/panfrost_devfreq.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
index f44d28fad085..1f49043aae73 100644
--- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c
+++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c
@@ -92,6 +92,15 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev)
struct thermal_cooling_device *cooling;
struct panfrost_devfreq *pfdevfreq = &pfdev->pfdevfreq;
+ if (pfdev->comp->num_supplies > 1) {
+ /*
+ * GPUs with more than 1 supply require platform-specific handling:
+ * continue without devfreq
+ */
+ DRM_DEV_ERROR(dev, "More than 1 supply is not supported yet\n");
+ return 0;
+ }
+
opp_table = dev_pm_opp_set_regulators(dev, pfdev->comp->supply_names,
pfdev->comp->num_supplies);
if (IS_ERR(opp_table)) {
--
2.29.2.729.g45daf8777d-goog
next prev parent reply other threads:[~2021-01-05 0:13 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-05 0:11 [PATCH v6 0/4] drm/panfrost: Add support for mt8183 GPU Nicolas Boichat
2021-01-05 0:11 ` [PATCH v6 1/4] dt-bindings: gpu: mali-bifrost: Add Mediatek MT8183 Nicolas Boichat
2021-01-05 0:11 ` [PATCH v6 2/4] arm64: dts: mt8183: Add node for the Mali GPU Nicolas Boichat
2021-01-05 0:11 ` Nicolas Boichat [this message]
2021-01-05 0:34 ` [PATCH v6 3/4] drm/panfrost: devfreq: Disable devfreq when num_supplies > 1 Alyssa Rosenzweig
2021-01-05 0:59 ` Nicolas Boichat
2021-01-07 15:59 ` Steven Price
2021-01-07 23:51 ` Nicolas Boichat
2021-01-05 0:11 ` [PATCH v6 4/4] drm/panfrost: Add mt8183-mali compatible string Nicolas Boichat
2021-01-05 0:35 ` Alyssa Rosenzweig
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