From: Heiko Stuebner <heiko@sntech.de>
To: hjc@rock-chips.com, andy.yan@rock-chips.com,
maarten.lankhorst@linux.intel.com, mripard@kernel.org,
tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch,
robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org,
andrzej.hajda@intel.com, neil.armstrong@linaro.org,
rfoss@kernel.org, Damon Ding <damon.ding@rock-chips.com>
Cc: dmitry.baryshkov@oss.qualcomm.com, devicetree@vger.kernel.org,
jonas@kwiboo.se, linux-kernel@vger.kernel.org,
dri-devel@lists.freedesktop.org, sebastian.reichel@collabora.com,
jernej.skrabec@gmail.com, dianders@chromium.org,
linux-rockchip@lists.infradead.org,
Damon Ding <damon.ding@rock-chips.com>,
Laurent.pinchart@ideasonboard.com, luca.ceresoli@bootlin.com,
nicolas.frattaroli@collabora.com,
linux-arm-kernel@lists.infradead.org, m.szyprowski@samsung.com
Subject: Re: [PATCH v3 01/10] dt-bindings: display: rockchip: analogix-dp: Expand clock-names "hclk" for the third clock
Date: Thu, 07 May 2026 13:42:50 +0200 [thread overview]
Message-ID: <4528155.7s5MMGUR32@phil> (raw)
In-Reply-To: <6496645.8F6SAcFxjW@phil>
Am Donnerstag, 7. Mai 2026, 13:40:09 Mitteleuropäische Sommerzeit schrieb Heiko Stuebner:
> Hi Damon,
>
> Am Donnerstag, 7. Mai 2026, 13:29:39 Mitteleuropäische Sommerzeit schrieb Damon Ding:
> > The RK3588 eDP controller needs the video datapath clock "hclk" to work
> > well. Previously, it works without explicitly adding this clock because
> > the 'rockchip,vo-grf = <&vo1_grf>' property implicitly enables HCLK_VO1.
> >
> > Fixes: f855146263b1 ("dt-bindings: display: rockchip: analogix-dp: Add support for RK3588")
> > Signed-off-by: Damon Ding <damon.ding@rock-chips.com>
> > ---
> > .../bindings/display/rockchip/rockchip,analogix-dp.yaml | 4 +++-
> > 1 file changed, 3 insertions(+), 1 deletion(-)
> >
> > diff --git a/Documentation/devicetree/bindings/display/rockchip/rockchip,analogix-dp.yaml b/Documentation/devicetree/bindings/display/rockchip/rockchip,analogix-dp.yaml
> > index d99b23b88cc5..d2bc8636b626 100644
> > --- a/Documentation/devicetree/bindings/display/rockchip/rockchip,analogix-dp.yaml
> > +++ b/Documentation/devicetree/bindings/display/rockchip/rockchip,analogix-dp.yaml
> > @@ -26,7 +26,9 @@ properties:
> > items:
> > - const: dp
> > - const: pclk
> > - - const: grf
> > + - enum:
> > + - grf
> > + - hclk
>
> are you sure about that?
>
> The edp uses the vo1-grf - so what enables its clock?
> For example the hdmi controllers on rk3588 also use the vo1-grf and
> explicitly handle that clock.
>
> So who does it for the eDP?
Ah, ... found the hclk_vo1 in the following patches.
Still the binding commit message could use some more words about what that
clock is, and why it can "replace" the GRF clock from earlier SoCs.
Heiko
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next prev parent reply other threads:[~2026-05-07 11:43 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-07 11:29 [PATCH v3 00/10] Add eDP support for RK3576 Damon Ding
2026-05-07 11:29 ` [PATCH v3 01/10] dt-bindings: display: rockchip: analogix-dp: Expand clock-names "hclk" for the third clock Damon Ding
2026-05-07 11:40 ` Heiko Stuebner
2026-05-07 11:42 ` Heiko Stuebner [this message]
2026-05-08 1:37 ` Damon Ding
2026-05-07 11:29 ` [PATCH v3 02/10] dt-bindings: display: rockchip: analogix-dp: Add descriptions for clocks Damon Ding
2026-05-07 11:29 ` [PATCH v3 03/10] arm64: dts: rockchip: Add missing clock "hclk" for RK3588 eDP0 nodes Damon Ding
2026-05-07 11:29 ` [PATCH v3 04/10] arm64: dts: rockchip: Add missing clock "hclk" for RK3588 eDP1 nodes Damon Ding
2026-05-07 11:29 ` [PATCH v3 05/10] drm/rockchip: analogix_dp: Enable clock "hclk" for RK3588 Damon Ding
2026-05-07 11:29 ` [PATCH v3 06/10] dt-bindings: display: rockchip: analogix-dp: Add support for RK3576 Damon Ding
2026-05-07 11:29 ` [PATCH v3 07/10] arm64: dts: rockchip: Add eDP node " Damon Ding
2026-05-07 11:29 ` [PATCH v3 08/10] drm/bridge: analogix_dp: Rename and simplify is_rockchip() Damon Ding
2026-05-07 11:29 ` [PATCH v3 09/10] drm/bridge: analogix_dp: Add support for RK3576 Damon Ding
2026-05-07 11:29 ` [PATCH v3 10/10] drm/rockchip: " Damon Ding
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