linux-kernel - [PATCH v6 1/2] dt-bindings: display/msm: mdss-common: add memory-region property

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Message-Id: <20230726132719.2117369-1-amit.pundir@linaro.org>
Date:   Wed, 26 Jul 2023 18:57:18 +0530
From:   Amit Pundir <amit.pundir@...aro.org>
To:     Bjorn Andersson <andersson@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Caleb Connolly <caleb.connolly@...aro.org>,
        Bryan Donoghue <bryan.odonoghue@...aro.org>,
        Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Krishna Manikandan <quic_mkrishn@...cinc.com>
Cc:     dri-devel <dri-devel@...ts.freedesktop.org>,
        freedreno <freedreno@...ts.freedesktop.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        dt <devicetree@...r.kernel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Rob Herring <robh@...nel.org>
Subject: [PATCH v6 1/2] dt-bindings: display/msm: mdss-common: add memory-region property

Add and document the reserved memory region property in the
mdss-common schema.

For now (sdm845-db845c), it points to a framebuffer memory
region reserved by the bootloader for splash screen.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Reviewed-by: Rob Herring <robh@...nel.org>
Signed-off-by: Amit Pundir <amit.pundir@...aro.org>
---
v6: Re-sending with review and ack tags. Ideally this
    dt-binding patch should be marked for stable as well,
    like the follow-up sdm845-db845c.dts patch in the series
    but it can't be cherry picked cleanly on older LTS
    versions. I can do it separately if it is required.

v5: Moving the dt-binding to mdss-common schema with
    updated commit message and property description.

v4: Adding this new dt-binding patch, in qcom,sdm845-mdss
    schema, in the v4 of the follow-up patch for
    sdm845-db845c.
    https://lore.kernel.org/lkml/20230712130215.666924-2-amit.pundir@linaro.org/

 .../devicetree/bindings/display/msm/mdss-common.yaml         | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/msm/mdss-common.yaml b/Documentation/devicetree/bindings/display/msm/mdss-common.yaml
index ccd7d6417523..84ed2757ded5 100644
--- a/Documentation/devicetree/bindings/display/msm/mdss-common.yaml
+++ b/Documentation/devicetree/bindings/display/msm/mdss-common.yaml
@@ -77,6 +77,12 @@ properties:
     items:
       - description: MDSS_CORE reset
 
+  memory-region:
+    maxItems: 1
+    description:
+      Phandle to a node describing a reserved framebuffer memory region.
+      For example, the splash memory region set up by the bootloader.
+
 required:
   - reg
   - reg-names
-- 
2.25.1