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From: Rob Herring <robh@kernel.org>
To: Sascha Hauer <s.hauer@pengutronix.de>
Cc: dri-devel@lists.freedesktop.org,
	linux-arm-kernel@lists.infradead.org,
	linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org,
	kernel@pengutronix.de, "Andy Yan" <andy.yan@rock-chips.com>,
	"Benjamin Gaignard" <benjamin.gaignard@collabora.com>,
	"Michael Riesch" <michael.riesch@wolfvision.net>,
	"Sandy Huang" <hjc@rock-chips.com>,
	"Heiko Stübner" <heiko@sntech.de>,
	"Peter Geis" <pgwipeout@gmail.com>
Subject: Re: [PATCH 08/22] dt-bindings: display: rockchip: dw-hdmi: use "ref" as clock name
Date: Tue, 21 Dec 2021 10:31:23 -0400	[thread overview]
Message-ID: <YcHlO/m/tGEEMnX9@robh.at.kernel.org> (raw)
In-Reply-To: <20211220110630.3521121-9-s.hauer@pengutronix.de>

On Mon, Dec 20, 2021 at 12:06:16PM +0100, Sascha Hauer wrote:
> "vpll" is a misnomer. A clock input to a device should be named after
> the usage in the device, not after the clock that drives it. On the
> rk3568 the same clock is driven by the HPLL.
> To fix that, this patch renames the vpll clock to ref clock.

The problem with this series is it breaks an old kernel with new dt. You 
can partially mitigate that with stable kernel backport, but IMO keeping 
the old name is not a burden to maintain.

And given RK3399 is widely used including by me, we should not be 
breaking compatibility.

So allow for ref in addition to vpll if you like, but only use 'ref' for 
new users. And add a comment in the schema to that effect.

Rob

> 
> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> ---
>  .../bindings/display/rockchip/rockchip,dw-hdmi.yaml        | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml b/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml
> index 6e09dd2ee05ac..3b40219e3ea60 100644
> --- a/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml
> +++ b/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml
> @@ -47,11 +47,12 @@ properties:
>        - enum:
>            - cec
>            - grf
> -          - vpll
> +          - ref
>        - enum:
>            - grf
> -          - vpll
> -      - const: vpll
> +          - ref
> +      - const:
> +          - ref
>  
>    ddc-i2c-bus:
>      $ref: /schemas/types.yaml#/definitions/phandle
> -- 
> 2.30.2
> 
> 

WARNING: multiple messages have this Message-ID
From: Rob Herring <robh@kernel.org>
To: Sascha Hauer <s.hauer@pengutronix.de>
Cc: dri-devel@lists.freedesktop.org,
	linux-arm-kernel@lists.infradead.org,
	linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org,
	kernel@pengutronix.de, "Andy Yan" <andy.yan@rock-chips.com>,
	"Benjamin Gaignard" <benjamin.gaignard@collabora.com>,
	"Michael Riesch" <michael.riesch@wolfvision.net>,
	"Sandy Huang" <hjc@rock-chips.com>,
	"Heiko Stübner" <heiko@sntech.de>,
	"Peter Geis" <pgwipeout@gmail.com>
Subject: Re: [PATCH 08/22] dt-bindings: display: rockchip: dw-hdmi: use "ref" as clock name
Date: Tue, 21 Dec 2021 10:31:23 -0400	[thread overview]
Message-ID: <YcHlO/m/tGEEMnX9@robh.at.kernel.org> (raw)
In-Reply-To: <20211220110630.3521121-9-s.hauer@pengutronix.de>

On Mon, Dec 20, 2021 at 12:06:16PM +0100, Sascha Hauer wrote:
> "vpll" is a misnomer. A clock input to a device should be named after
> the usage in the device, not after the clock that drives it. On the
> rk3568 the same clock is driven by the HPLL.
> To fix that, this patch renames the vpll clock to ref clock.

The problem with this series is it breaks an old kernel with new dt. You 
can partially mitigate that with stable kernel backport, but IMO keeping 
the old name is not a burden to maintain.

And given RK3399 is widely used including by me, we should not be 
breaking compatibility.

So allow for ref in addition to vpll if you like, but only use 'ref' for 
new users. And add a comment in the schema to that effect.

Rob

> 
> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> ---
>  .../bindings/display/rockchip/rockchip,dw-hdmi.yaml        | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml b/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml
> index 6e09dd2ee05ac..3b40219e3ea60 100644
> --- a/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml
> +++ b/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml
> @@ -47,11 +47,12 @@ properties:
>        - enum:
>            - cec
>            - grf
> -          - vpll
> +          - ref
>        - enum:
>            - grf
> -          - vpll
> -      - const: vpll
> +          - ref
> +      - const:
> +          - ref
>  
>    ddc-i2c-bus:
>      $ref: /schemas/types.yaml#/definitions/phandle
> -- 
> 2.30.2
> 
> 

_______________________________________________
Linux-rockchip mailing list
Linux-rockchip@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-rockchip

WARNING: multiple messages have this Message-ID
From: Rob Herring <robh@kernel.org>
To: Sascha Hauer <s.hauer@pengutronix.de>
Cc: devicetree@vger.kernel.org,
	Benjamin Gaignard <benjamin.gaignard@collabora.com>,
	Peter Geis <pgwipeout@gmail.com>,
	Sandy Huang <hjc@rock-chips.com>,
	dri-devel@lists.freedesktop.org,
	linux-rockchip@lists.infradead.org,
	Michael Riesch <michael.riesch@wolfvision.net>,
	kernel@pengutronix.de, Andy Yan <andy.yan@rock-chips.com>,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 08/22] dt-bindings: display: rockchip: dw-hdmi: use "ref" as clock name
Date: Tue, 21 Dec 2021 10:31:23 -0400	[thread overview]
Message-ID: <YcHlO/m/tGEEMnX9@robh.at.kernel.org> (raw)
In-Reply-To: <20211220110630.3521121-9-s.hauer@pengutronix.de>

On Mon, Dec 20, 2021 at 12:06:16PM +0100, Sascha Hauer wrote:
> "vpll" is a misnomer. A clock input to a device should be named after
> the usage in the device, not after the clock that drives it. On the
> rk3568 the same clock is driven by the HPLL.
> To fix that, this patch renames the vpll clock to ref clock.

The problem with this series is it breaks an old kernel with new dt. You 
can partially mitigate that with stable kernel backport, but IMO keeping 
the old name is not a burden to maintain.

And given RK3399 is widely used including by me, we should not be 
breaking compatibility.

So allow for ref in addition to vpll if you like, but only use 'ref' for 
new users. And add a comment in the schema to that effect.

Rob

> 
> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> ---
>  .../bindings/display/rockchip/rockchip,dw-hdmi.yaml        | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml b/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml
> index 6e09dd2ee05ac..3b40219e3ea60 100644
> --- a/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml
> +++ b/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml
> @@ -47,11 +47,12 @@ properties:
>        - enum:
>            - cec
>            - grf
> -          - vpll
> +          - ref
>        - enum:
>            - grf
> -          - vpll
> -      - const: vpll
> +          - ref
> +      - const:
> +          - ref
>  
>    ddc-i2c-bus:
>      $ref: /schemas/types.yaml#/definitions/phandle
> -- 
> 2.30.2
> 
> 

WARNING: multiple messages have this Message-ID
From: Rob Herring <robh@kernel.org>
To: Sascha Hauer <s.hauer@pengutronix.de>
Cc: dri-devel@lists.freedesktop.org,
	linux-arm-kernel@lists.infradead.org,
	linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org,
	kernel@pengutronix.de, "Andy Yan" <andy.yan@rock-chips.com>,
	"Benjamin Gaignard" <benjamin.gaignard@collabora.com>,
	"Michael Riesch" <michael.riesch@wolfvision.net>,
	"Sandy Huang" <hjc@rock-chips.com>,
	"Heiko Stübner" <heiko@sntech.de>,
	"Peter Geis" <pgwipeout@gmail.com>
Subject: Re: [PATCH 08/22] dt-bindings: display: rockchip: dw-hdmi: use "ref" as clock name
Date: Tue, 21 Dec 2021 10:31:23 -0400	[thread overview]
Message-ID: <YcHlO/m/tGEEMnX9@robh.at.kernel.org> (raw)
In-Reply-To: <20211220110630.3521121-9-s.hauer@pengutronix.de>

On Mon, Dec 20, 2021 at 12:06:16PM +0100, Sascha Hauer wrote:
> "vpll" is a misnomer. A clock input to a device should be named after
> the usage in the device, not after the clock that drives it. On the
> rk3568 the same clock is driven by the HPLL.
> To fix that, this patch renames the vpll clock to ref clock.

The problem with this series is it breaks an old kernel with new dt. You 
can partially mitigate that with stable kernel backport, but IMO keeping 
the old name is not a burden to maintain.

And given RK3399 is widely used including by me, we should not be 
breaking compatibility.

So allow for ref in addition to vpll if you like, but only use 'ref' for 
new users. And add a comment in the schema to that effect.

Rob

> 
> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> ---
>  .../bindings/display/rockchip/rockchip,dw-hdmi.yaml        | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml b/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml
> index 6e09dd2ee05ac..3b40219e3ea60 100644
> --- a/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml
> +++ b/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml
> @@ -47,11 +47,12 @@ properties:
>        - enum:
>            - cec
>            - grf
> -          - vpll
> +          - ref
>        - enum:
>            - grf
> -          - vpll
> -      - const: vpll
> +          - ref
> +      - const:
> +          - ref
>  
>    ddc-i2c-bus:
>      $ref: /schemas/types.yaml#/definitions/phandle
> -- 
> 2.30.2
> 
> 

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2021-12-21 14:31 UTC|newest]

Thread overview: 189+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-20 11:06 [PATCH v3 00/22] drm/rockchip: RK356x VOP2 support Sascha Hauer
2021-12-20 11:06 ` Sascha Hauer
2021-12-20 11:06 ` Sascha Hauer
2021-12-20 11:06 ` Sascha Hauer
2021-12-20 11:06 ` [PATCH 01/22] drm/rockchip: dw_hdmi: Do not leave clock enabled in error case Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06 ` [PATCH 02/22] drm/rockchip: dw_hdmi: rename vpll clock to reference clock Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06 ` [PATCH 03/22] drm/rockchip: dw_hdmi: add rk3568 support Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06 ` [PATCH 04/22] drm/rockchip: dw_hdmi: add regulator support Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06 ` [PATCH 05/22] drm/rockchip: dw_hdmi: Add support for hclk Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06 ` [PATCH 06/22] dt-bindings: display: rockchip: dw-hdmi: Add compatible for rk3568 HDMI Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06 ` [PATCH 07/22] dt-bindings: display: rockchip: dw-hdmi: Make unwedge pinctrl optional Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 14:27   ` Rob Herring
2021-12-20 14:27     ` Rob Herring
2021-12-20 14:27     ` Rob Herring
2021-12-20 14:27     ` Rob Herring
2021-12-20 11:06 ` [PATCH 08/22] dt-bindings: display: rockchip: dw-hdmi: use "ref" as clock name Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 14:27   ` Rob Herring
2021-12-20 14:27     ` Rob Herring
2021-12-20 14:27     ` Rob Herring
2021-12-20 14:27     ` Rob Herring
2021-12-21 14:31   ` Rob Herring [this message]
2021-12-21 14:31     ` Rob Herring
2021-12-21 14:31     ` Rob Herring
2021-12-21 14:31     ` Rob Herring
2021-12-22 10:47     ` Sascha Hauer
2021-12-22 10:47       ` Sascha Hauer
2021-12-22 10:47       ` Sascha Hauer
2021-12-22 10:47       ` Sascha Hauer
2021-12-22 13:52       ` Rob Herring
2021-12-22 13:52         ` Rob Herring
2021-12-22 13:52         ` Rob Herring
2021-12-22 13:52         ` Rob Herring
2021-12-22 19:39         ` Heiko Stübner
2021-12-22 19:39           ` Heiko Stübner
2021-12-22 19:39           ` Heiko Stübner
2021-12-22 19:39           ` Heiko Stübner
2021-12-22 19:44           ` Nicolas Frattaroli
2021-12-22 19:44             ` Nicolas Frattaroli
2021-12-22 19:44             ` Nicolas Frattaroli
2021-12-22 19:44             ` Nicolas Frattaroli
2021-12-22 19:56           ` Rob Herring
2021-12-22 19:56             ` Rob Herring
2021-12-22 19:56             ` Rob Herring
2021-12-22 19:56             ` Rob Herring
2021-12-20 11:06 ` [PATCH 09/22] dt-bindings: display: rockchip: dw-hdmi: Add regulator support Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 14:27   ` Rob Herring
2021-12-20 14:27     ` Rob Herring
2021-12-20 14:27     ` Rob Herring
2021-12-20 14:27     ` Rob Herring
2021-12-20 11:06 ` [PATCH 10/22] dt-bindings: display: rockchip: dw-hdmi: Add additional clock Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06 ` [PATCH 11/22] dt-bindings: display: rockchip: Add binding for VOP2 Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 14:27   ` Rob Herring
2021-12-20 14:27     ` Rob Herring
2021-12-20 14:27     ` Rob Herring
2021-12-20 14:27     ` Rob Herring
2021-12-21 14:33   ` Rob Herring
2021-12-21 14:33     ` Rob Herring
2021-12-21 14:33     ` Rob Herring
2021-12-21 14:33     ` Rob Herring
2021-12-20 11:06 ` [PATCH 12/22] arm64: dts: rockchip: rk3399: reorder hmdi clocks Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06 ` [PATCH 13/22] arm64: dts: rockchip: rk3399: rename HDMI ref clock to 'ref' Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06 ` [PATCH 14/22] arm64: dts: rockchip: rk356x: Add VOP2 nodes Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06 ` [PATCH 15/22] arm64: dts: rockchip: rk356x: Add HDMI nodes Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06 ` [PATCH 16/22] arm64: dts: rockchip: rk3568-evb: Enable VOP2 and hdmi Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06 ` [PATCH 17/22] arm64: dts: rockchip: enable vop2 and hdmi tx on quartz64a Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06 ` [PATCH 18/22] clk: rk3568: drop CLK_SET_RATE_PARENT from dclk_vop* Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06 ` [PATCH 19/22] clk: rk3568: Add CLK_SET_RATE_PARENT to the HDMI reference clock Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06 ` [PATCH 20/22] drm/encoder: Add of_graph port to struct drm_encoder Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-21 17:31   ` Heiko Stübner
2021-12-21 17:31     ` Heiko Stübner
2021-12-21 17:31     ` Heiko Stübner
2021-12-21 17:31     ` Heiko Stübner
2021-12-20 11:06 ` [PATCH 21/22] drm/rockchip: Make VOP driver optional Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06 ` [PATCH 22/22] drm: rockchip: Add VOP2 driver Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 11:06   ` Sascha Hauer
2021-12-20 14:16   ` Nicolas Frattaroli
2021-12-20 14:16     ` Nicolas Frattaroli
2021-12-20 14:16     ` Nicolas Frattaroli
2021-12-20 14:16     ` Nicolas Frattaroli
2021-12-20 16:53     ` Nicolas Frattaroli
2021-12-20 16:53       ` Nicolas Frattaroli
2021-12-20 16:53       ` Nicolas Frattaroli
2021-12-20 16:53       ` Nicolas Frattaroli
2021-12-20 18:51     ` Sascha Hauer
2021-12-20 18:51       ` Sascha Hauer
2021-12-20 18:51       ` Sascha Hauer
2021-12-20 18:51       ` Sascha Hauer
2021-12-20 23:20   ` kernel test robot
2021-12-20 23:20     ` kernel test robot
2021-12-20 23:20     ` kernel test robot
2021-12-21 13:44   ` Nicolas Frattaroli
2021-12-21 13:44     ` Nicolas Frattaroli
2021-12-21 13:44     ` Nicolas Frattaroli
2021-12-21 13:44     ` Nicolas Frattaroli
2021-12-22 17:07     ` Nicolas Frattaroli
2021-12-22 17:07       ` Nicolas Frattaroli
2021-12-22 17:07       ` Nicolas Frattaroli
2021-12-22 17:07       ` Nicolas Frattaroli
2022-01-03 14:55     ` Sascha Hauer
2022-01-03 14:55       ` Sascha Hauer
2022-01-03 14:55       ` Sascha Hauer
2022-01-03 14:55       ` Sascha Hauer
2022-01-04 11:07   ` Andy Yan
2022-01-04 11:07     ` Andy Yan
2022-01-04 11:07     ` Andy Yan
2022-01-05 12:20     ` Sascha Hauer
2022-01-05 12:20       ` Sascha Hauer
2022-01-05 12:20       ` Sascha Hauer
2022-01-05 12:20       ` Sascha Hauer
2021-12-20 11:51 ` [PATCH v3 00/22] drm/rockchip: RK356x VOP2 support Nicolas Frattaroli
2021-12-20 11:51   ` Nicolas Frattaroli
2021-12-20 11:51   ` Nicolas Frattaroli
2021-12-20 11:51   ` Nicolas Frattaroli
2022-01-19 11:29 ` Piotr Oniszczuk
2022-01-19 11:29   ` Piotr Oniszczuk
2022-01-19 11:29   ` Piotr Oniszczuk
2022-01-19 11:29   ` Piotr Oniszczuk
2022-01-21 10:32   ` Sascha Hauer
2022-01-21 10:32     ` Sascha Hauer
2022-01-21 10:32     ` Sascha Hauer
2022-01-21 10:32     ` Sascha Hauer
2022-01-21 15:43     ` Piotr Oniszczuk
2022-01-21 15:43       ` Piotr Oniszczuk
2022-01-21 15:43       ` Piotr Oniszczuk
2022-01-21 15:43       ` Piotr Oniszczuk

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