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Message-ID: <7acf71bb-092d-14f4-8208-6d906a993211@st.com>
Date: Tue, 28 Jan 2020 16:49:35 +0000
From: Philippe CORNU <philippe.cornu@...com>
To: Benjamin GAIGNARD <benjamin.gaignard@...com>,
Maxime Ripard <maxime@...no.tech>
CC: "l.stach@...gutronix.de" <l.stach@...gutronix.de>,
"linux+etnaviv@...linux.org.uk" <linux+etnaviv@...linux.org.uk>,
"christian.gmeiner@...il.com" <christian.gmeiner@...il.com>,
"airlied@...ux.ie" <airlied@...ux.ie>,
"daniel@...ll.ch" <daniel@...ll.ch>,
"robh+dt@...nel.org" <robh+dt@...nel.org>,
"mark.rutland@....com" <mark.rutland@....com>,
"etnaviv@...ts.freedesktop.org" <etnaviv@...ts.freedesktop.org>,
"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Pierre Yves MORDRET <pierre-yves.mordret@...com>
Subject: Re: [PATCH v2] dt-bindings: display: Convert etnaviv to json-schema
Hi Benjamin,
On 1/28/20 1:31 PM, Benjamin GAIGNARD wrote:
>
> On 1/28/20 1:06 PM, Maxime Ripard wrote:
>> Hi Benjamin,
>>
>> On Tue, Jan 28, 2020 at 09:20:13AM +0100, Benjamin Gaignard wrote:
>>> Convert etnaviv bindings to yaml format.
>>>
>>> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...com>
>>> ---
>>> .../bindings/display/etnaviv/etnaviv-drm.txt | 36 -----------
>>> .../devicetree/bindings/gpu/vivante,gc.yaml | 72 ++++++++++++++++++++++
>>> 2 files changed, 72 insertions(+), 36 deletions(-)
>>> delete mode 100644 Documentation/devicetree/bindings/display/etnaviv/etnaviv-drm.txt
>>> create mode 100644 Documentation/devicetree/bindings/gpu/vivante,gc.yaml
>>>
>>> diff --git a/Documentation/devicetree/bindings/display/etnaviv/etnaviv-drm.txt b/Documentation/devicetree/bindings/display/etnaviv/etnaviv-drm.txt
>>> deleted file mode 100644
>>> index 8def11b16a24..000000000000
>>> --- a/Documentation/devicetree/bindings/display/etnaviv/etnaviv-drm.txt
>>> +++ /dev/null
>>> @@ -1,36 +0,0 @@
>>> -Vivante GPU core devices
>>> -========================
>>> -
>>> -Required properties:
>>> -- compatible: Should be "vivante,gc"
>>> - A more specific compatible is not needed, as the cores contain chip
>>> - identification registers at fixed locations, which provide all the
>>> - necessary information to the driver.
>>> -- reg: should be register base and length as documented in the
>>> - datasheet
>>> -- interrupts: Should contain the cores interrupt line
>>> -- clocks: should contain one clock for entry in clock-names
>>> - see Documentation/devicetree/bindings/clock/clock-bindings.txt
>>> -- clock-names:
>>> - - "bus": AXI/master interface clock
>>> - - "reg": AHB/slave interface clock
>>> - (only required if GPU can gate slave interface independently)
>>> - - "core": GPU core clock
>>> - - "shader": Shader clock (only required if GPU has feature PIPE_3D)
>>> -
>>> -Optional properties:
>>> -- power-domains: a power domain consumer specifier according to
>>> - Documentation/devicetree/bindings/power/power_domain.txt
>>> -
>>> -example:
>>> -
>>> -gpu_3d: gpu@...000 {
>>> - compatible = "vivante,gc";
>>> - reg = <0x00130000 0x4000>;
>>> - interrupts = <0 9 IRQ_TYPE_LEVEL_HIGH>;
>>> - clocks = <&clks IMX6QDL_CLK_GPU3D_AXI>,
>>> - <&clks IMX6QDL_CLK_GPU3D_CORE>,
>>> - <&clks IMX6QDL_CLK_GPU3D_SHADER>;
>>> - clock-names = "bus", "core", "shader";
>>> - power-domains = <&gpc 1>;
>>> -};
>>> diff --git a/Documentation/devicetree/bindings/gpu/vivante,gc.yaml b/Documentation/devicetree/bindings/gpu/vivante,gc.yaml
>>> new file mode 100644
>>> index 000000000000..c4f549c0d750
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/gpu/vivante,gc.yaml
>>> @@ -0,0 +1,72 @@
>>> +# SPDX-License-Identifier: GPL-2.0
>>> +%YAML 1.2
>>> +---
>>> +$id: http://devicetree.org/schemas/gpu/vivante,gc.yaml#
>>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>>> +
>>> +title: Vivante GPU Bindings
>>> +
>>> +description: Vivante GPU core devices
>>> +
>>> +maintainers:
>>> + - Lucas Stach <l.stach@...gutronix.de>
>>> +
>>> +properties:
>>> + compatible:
>>> + const: vivante,gc
>>> +
>>> + reg:
>>> + maxItems: 1
>>> +
>>> + interrupts:
>>> + maxItems: 1
>>> +
>>> + clocks:
>>> + items:
>>> + - description: AXI/master interface clock
>>> + - description: GPU core clock
>>> + - description: Shader clock (only required if GPU has feature PIPE_3D)
>>> + - description: AHB/slave interface clock (only required if GPU can gate slave interface independently)
>> Can you have an AHB slave interface clock without a shader clock?
>
> No because the items in the list are ordered so you need to have, in
> order: "bus", "core", "shader", "reg"
>
> If it is needed to allow any number of clock in any order I could write
> it like this:
>
> clocks:
>
> minItems: 1
>
> maxItems: 4
>
> clock-names:
>
> items:
>
> enum: [ bus, core, shader, reg]
>
> minItems: 1
>
> maxItems: 4
>
> Benjamin
Thank you for your patch,
I confirm that your last proposal with enum would be better.
With that,
Reviewed-by: Philippe Cornu <philippe.cornu@...com>
Philippe :-)
>
>>
>>> + minItems: 2
>>> + maxItems: 4
>>> +
>>> + clock-names:
>>> + items:
>>> + - const: bus
>>> + - const: core
>>> + - const: shader
>>> + - const: reg
>>> + minItems: 2
>>> + maxItems: 4
>> If so, that check will fail, since it would expect a clock named
>> shader on the 3rd item.
>>
>> It looks good otherwise, thanks!
>> Maxime
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