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From: Douglas Anderson <dianders@chromium.org>
To: Rob Herring <robh+dt@kernel.org>, Rob Clark <robdclark@gmail.com>,
	Sean Paul <sean@poorly.run>, Andy Gross <agross@kernel.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org,
	freedreno@lists.freedesktop.org, devicetree@vger.kernel.org,
	Douglas Anderson <dianders@chromium.org>,
	Daniel Vetter <daniel@ffwll.ch>, David Airlie <airlied@linux.ie>,
	linux-kernel@vger.kernel.org
Subject: [PATCH 2/9] dt-bindings: msm/dpu: Add simple-bus to dpu bindings
Date: Fri, 10 Jul 2020 16:02:17 -0700	[thread overview]
Message-ID: <20200710160131.2.Id4b5c92d28b7350d047218774afaf69b683651e0@changeid> (raw)
In-Reply-To: <20200710230224.2265647-1-dianders@chromium.org>

We have a whole bunch of child devices that we really just want
treated as other devices to instantiate.  Add the "simple-bus"
property for this.

Commit-notes
This bindings file really needs to move over to yaml.  Hopefully
someone at Qualcomm who's working on display code can help with that.

Right now on Linux we have a manual call to of_platform_populate() to
populate our children.  That's pretty non-ideal as described in
another patch in this series and I'm trying to remove it.

I'm not sure how much of a hack to consider "simple-bus".  I've seen
it used like this before, but if folks tell me that it's terrible then
I guess we'll have to figure some other way out of our crazy
-EPROBE_DEFER loop in Linux.
END

Signed-off-by: Douglas Anderson <dianders@chromium.org>
---

 Documentation/devicetree/bindings/display/msm/dpu.txt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/display/msm/dpu.txt b/Documentation/devicetree/bindings/display/msm/dpu.txt
index 551ae26f60da..b88269524365 100644
--- a/Documentation/devicetree/bindings/display/msm/dpu.txt
+++ b/Documentation/devicetree/bindings/display/msm/dpu.txt
@@ -8,7 +8,9 @@ The DPU display controller is found in SDM845 SoC.
 
 MDSS:
 Required properties:
-- compatible:  "qcom,sdm845-mdss", "qcom,sc7180-mdss"
+- compatible:  One of:
+  - "qcom,sdm845-mdss", "simple-bus"
+  - "qcom,sc7180-mdss", "simple-bus"
 - reg: physical base address and length of contoller's registers.
 - reg-names: register region names. The following region is required:
   * "mdss"
-- 
2.27.0.383.g050319c2ae-goog


  parent reply	other threads:[~2020-07-10 23:02 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-10 23:02 [PATCH 0/9] drm/msm: Avoid possible infinite probe deferral and speed booting Douglas Anderson
2020-07-10 23:02 ` [PATCH 1/9] drm/msm: Use the devm variant of of_platform_populate() Douglas Anderson
2020-07-10 23:02 ` Douglas Anderson [this message]
2020-07-10 23:02 ` [PATCH 3/9] dt-bindings: msm/mdp5: Add simple-bus to dpu bindings Douglas Anderson
2020-07-10 23:02 ` [PATCH 4/9] drm/msm: Avoid manually populating our children if "simple-bus" is there Douglas Anderson
2020-07-10 23:02 ` [PATCH 5/9] arm64: dts: qcom: sc7180: Add "simple-bus" to our mdss node Douglas Anderson
2020-07-10 23:02 ` [PATCH 6/9] arm64: dts: qcom: sdm845: " Douglas Anderson
2020-07-10 23:02 ` [PATCH 7/9] arm64: dts: qcom: msm8916: " Douglas Anderson
2020-07-10 23:02 ` [PATCH 8/9] arm64: dts: qcom: msm8996: " Douglas Anderson
2020-07-10 23:02 ` [PATCH 9/9] ARM: dts: qcom: msm8974: " Douglas Anderson
2020-07-13 14:11 ` [PATCH 0/9] drm/msm: Avoid possible infinite probe deferral and speed booting Rob Herring
2020-07-13 14:58   ` [Freedreno] " Jeffrey Hugo
2020-07-13 15:08   ` Doug Anderson
2020-07-13 20:25     ` Rob Herring
2020-07-13 21:32       ` Rob Clark
2020-07-13 23:50       ` Doug Anderson
2020-07-14 16:32         ` [Freedreno] " Jeffrey Hugo
2020-07-14 22:13           ` Rob Herring
2020-07-14 22:52             ` Bjorn Andersson
2020-07-15 17:30               ` Rob Herring

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