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From: Sascha Hauer <s.hauer@pengutronix.de>
To: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org,
	Benjamin Gaignard <benjamin.gaignard@collabora.com>,
	Peter Geis <pgwipeout@gmail.com>,
	Sandy Huang <hjc@rock-chips.com>,
	Douglas Anderson <dianders@chromium.org>,
	linux-rockchip@lists.infradead.org,
	Michael Riesch <michael.riesch@wolfvision.net>,
	kernel@pengutronix.de, Yakir Yang <ykk@rock-chips.com>,
	Andy Yan <andy.yan@rock-chips.com>,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v6 13/23] drm/rockchip: dw_hdmi: Set cur_ctr to 0 always
Date: Thu, 17 Feb 2022 16:12:59 +0100	[thread overview]
Message-ID: <20220217151259.GT18637@pengutronix.de> (raw)
In-Reply-To: <f5abe6aa-473a-a00d-2bc5-b8a1d0560d1f@collabora.com>

On Thu, Feb 17, 2022 at 05:00:37PM +0300, Dmitry Osipenko wrote:
> 17.02.2022 11:29, Sascha Hauer пишет:
> > From: Douglas Anderson <dianders@chromium.org>
> > 
> > Jitter was improved by lowering the MPLL bandwidth to account for high
> > frequency noise in the rk3288 PLL.  In each case MPLL bandwidth was
> > lowered only enough to get us a comfortable margin.  We believe that
> > lowering the bandwidth like this is safe given sufficient testing.
> 
> There are no device-trees that use "rockchip,rk3288-cru", AFAICS..

What do you mean? In my tree I have:

arch/arm/boot/dts/rk3288.dtsi:863:              compatible = "rockchip,rk3288-cru";
drivers/clk/rockchip/clk-rk3288.c:985:CLK_OF_DECLARE(rk3288_cru, "rockchip,rk3288-cru", rk3288_clk_init);

> 
> Was this change tested on a non-RK3288 devices?

Yes, on a rk3568 ;)

The patch has been posted back in 2015 and was added to the Rockchip
downstream kernel in 2016. I don't know how thoroughly Rockchip tests
their kernels, but I assume the patch wouldn't be there if it caused
any problems.

Sascha

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

WARNING: multiple messages have this Message-ID (diff)
From: Sascha Hauer <s.hauer@pengutronix.de>
To: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org,
	Benjamin Gaignard <benjamin.gaignard@collabora.com>,
	Peter Geis <pgwipeout@gmail.com>,
	Sandy Huang <hjc@rock-chips.com>,
	Douglas Anderson <dianders@chromium.org>,
	linux-rockchip@lists.infradead.org,
	Michael Riesch <michael.riesch@wolfvision.net>,
	kernel@pengutronix.de, Yakir Yang <ykk@rock-chips.com>,
	Andy Yan <andy.yan@rock-chips.com>,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v6 13/23] drm/rockchip: dw_hdmi: Set cur_ctr to 0 always
Date: Thu, 17 Feb 2022 16:12:59 +0100	[thread overview]
Message-ID: <20220217151259.GT18637@pengutronix.de> (raw)
In-Reply-To: <f5abe6aa-473a-a00d-2bc5-b8a1d0560d1f@collabora.com>

On Thu, Feb 17, 2022 at 05:00:37PM +0300, Dmitry Osipenko wrote:
> 17.02.2022 11:29, Sascha Hauer пишет:
> > From: Douglas Anderson <dianders@chromium.org>
> > 
> > Jitter was improved by lowering the MPLL bandwidth to account for high
> > frequency noise in the rk3288 PLL.  In each case MPLL bandwidth was
> > lowered only enough to get us a comfortable margin.  We believe that
> > lowering the bandwidth like this is safe given sufficient testing.
> 
> There are no device-trees that use "rockchip,rk3288-cru", AFAICS..

What do you mean? In my tree I have:

arch/arm/boot/dts/rk3288.dtsi:863:              compatible = "rockchip,rk3288-cru";
drivers/clk/rockchip/clk-rk3288.c:985:CLK_OF_DECLARE(rk3288_cru, "rockchip,rk3288-cru", rk3288_clk_init);

> 
> Was this change tested on a non-RK3288 devices?

Yes, on a rk3568 ;)

The patch has been posted back in 2015 and was added to the Rockchip
downstream kernel in 2016. I don't know how thoroughly Rockchip tests
their kernels, but I assume the patch wouldn't be there if it caused
any problems.

Sascha

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

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

WARNING: multiple messages have this Message-ID (diff)
From: Sascha Hauer <s.hauer@pengutronix.de>
To: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Cc: devicetree@vger.kernel.org,
	Benjamin Gaignard <benjamin.gaignard@collabora.com>,
	kernel@pengutronix.de, Douglas Anderson <dianders@chromium.org>,
	dri-devel@lists.freedesktop.org, Sandy Huang <hjc@rock-chips.com>,
	linux-rockchip@lists.infradead.org,
	Michael Riesch <michael.riesch@wolfvision.net>,
	Peter Geis <pgwipeout@gmail.com>, Yakir Yang <ykk@rock-chips.com>,
	Andy Yan <andy.yan@rock-chips.com>,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v6 13/23] drm/rockchip: dw_hdmi: Set cur_ctr to 0 always
Date: Thu, 17 Feb 2022 16:12:59 +0100	[thread overview]
Message-ID: <20220217151259.GT18637@pengutronix.de> (raw)
In-Reply-To: <f5abe6aa-473a-a00d-2bc5-b8a1d0560d1f@collabora.com>

On Thu, Feb 17, 2022 at 05:00:37PM +0300, Dmitry Osipenko wrote:
> 17.02.2022 11:29, Sascha Hauer пишет:
> > From: Douglas Anderson <dianders@chromium.org>
> > 
> > Jitter was improved by lowering the MPLL bandwidth to account for high
> > frequency noise in the rk3288 PLL.  In each case MPLL bandwidth was
> > lowered only enough to get us a comfortable margin.  We believe that
> > lowering the bandwidth like this is safe given sufficient testing.
> 
> There are no device-trees that use "rockchip,rk3288-cru", AFAICS..

What do you mean? In my tree I have:

arch/arm/boot/dts/rk3288.dtsi:863:              compatible = "rockchip,rk3288-cru";
drivers/clk/rockchip/clk-rk3288.c:985:CLK_OF_DECLARE(rk3288_cru, "rockchip,rk3288-cru", rk3288_clk_init);

> 
> Was this change tested on a non-RK3288 devices?

Yes, on a rk3568 ;)

The patch has been posted back in 2015 and was added to the Rockchip
downstream kernel in 2016. I don't know how thoroughly Rockchip tests
their kernels, but I assume the patch wouldn't be there if it caused
any problems.

Sascha

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

WARNING: multiple messages have this Message-ID (diff)
From: Sascha Hauer <s.hauer@pengutronix.de>
To: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org,
	Benjamin Gaignard <benjamin.gaignard@collabora.com>,
	Peter Geis <pgwipeout@gmail.com>,
	Sandy Huang <hjc@rock-chips.com>,
	Douglas Anderson <dianders@chromium.org>,
	linux-rockchip@lists.infradead.org,
	Michael Riesch <michael.riesch@wolfvision.net>,
	kernel@pengutronix.de, Yakir Yang <ykk@rock-chips.com>,
	Andy Yan <andy.yan@rock-chips.com>,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v6 13/23] drm/rockchip: dw_hdmi: Set cur_ctr to 0 always
Date: Thu, 17 Feb 2022 16:12:59 +0100	[thread overview]
Message-ID: <20220217151259.GT18637@pengutronix.de> (raw)
In-Reply-To: <f5abe6aa-473a-a00d-2bc5-b8a1d0560d1f@collabora.com>

On Thu, Feb 17, 2022 at 05:00:37PM +0300, Dmitry Osipenko wrote:
> 17.02.2022 11:29, Sascha Hauer пишет:
> > From: Douglas Anderson <dianders@chromium.org>
> > 
> > Jitter was improved by lowering the MPLL bandwidth to account for high
> > frequency noise in the rk3288 PLL.  In each case MPLL bandwidth was
> > lowered only enough to get us a comfortable margin.  We believe that
> > lowering the bandwidth like this is safe given sufficient testing.
> 
> There are no device-trees that use "rockchip,rk3288-cru", AFAICS..

What do you mean? In my tree I have:

arch/arm/boot/dts/rk3288.dtsi:863:              compatible = "rockchip,rk3288-cru";
drivers/clk/rockchip/clk-rk3288.c:985:CLK_OF_DECLARE(rk3288_cru, "rockchip,rk3288-cru", rk3288_clk_init);

> 
> Was this change tested on a non-RK3288 devices?

Yes, on a rk3568 ;)

The patch has been posted back in 2015 and was added to the Rockchip
downstream kernel in 2016. I don't know how thoroughly Rockchip tests
their kernels, but I assume the patch wouldn't be there if it caused
any problems.

Sascha

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

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

  reply	other threads:[~2022-02-17 15:13 UTC|newest]

Thread overview: 201+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-02-17  8:29 [PATCH v6 00/23] drm/rockchip: RK356x VOP2 support Sascha Hauer
2022-02-17  8:29 ` Sascha Hauer
2022-02-17  8:29 ` Sascha Hauer
2022-02-17  8:29 ` Sascha Hauer
2022-02-17  8:29 ` [PATCH v6 01/23] drm/rockchip: Embed drm_encoder into rockchip_decoder Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29 ` [PATCH v6 02/23] drm/rockchip: dw_hdmi: rename vpll clock to reference clock Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17 13:20   ` Dmitry Osipenko
2022-02-17 13:20     ` Dmitry Osipenko
2022-02-17 13:20     ` Dmitry Osipenko
2022-02-17 13:20     ` Dmitry Osipenko
2022-02-17 13:37     ` Sascha Hauer
2022-02-17 13:37       ` Sascha Hauer
2022-02-17 13:37       ` Sascha Hauer
2022-02-17 13:37       ` Sascha Hauer
2022-02-17  8:29 ` [PATCH v6 03/23] dt-bindings: display: rockchip: dw-hdmi: use "ref" as clock name Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29 ` [PATCH v6 04/23] arm64: dts: rockchip: rk3399: rename HDMI ref clock to 'ref' Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29 ` [PATCH v6 05/23] drm/rockchip: dw_hdmi: add rk3568 support Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29 ` [PATCH v6 06/23] dt-bindings: display: rockchip: dw-hdmi: Add compatible for rk3568 HDMI Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29 ` [PATCH v6 07/23] drm/rockchip: dw_hdmi: add regulator support Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17 13:18   ` Dmitry Osipenko
2022-02-17 13:18     ` Dmitry Osipenko
2022-02-17 13:18     ` Dmitry Osipenko
2022-02-17 13:18     ` Dmitry Osipenko
2022-02-17  8:29 ` [PATCH v6 08/23] dt-bindings: display: rockchip: dw-hdmi: Add " Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29 ` [PATCH v6 09/23] drm/rockchip: dw_hdmi: Add support for hclk Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17 12:35   ` Dmitry Osipenko
2022-02-17 12:35     ` Dmitry Osipenko
2022-02-17 12:35     ` Dmitry Osipenko
2022-02-17 12:35     ` Dmitry Osipenko
2022-02-17 15:00     ` Sascha Hauer
2022-02-17 15:00       ` Sascha Hauer
2022-02-17 15:00       ` Sascha Hauer
2022-02-17 15:00       ` Sascha Hauer
2022-02-17 16:59       ` Dmitry Osipenko
2022-02-17 16:59         ` Dmitry Osipenko
2022-02-17 16:59         ` Dmitry Osipenko
2022-02-17 16:59         ` Dmitry Osipenko
2022-02-17  8:29 ` [PATCH v6 10/23] dt-bindings: display: rockchip: dw-hdmi: Add additional clock Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29 ` [PATCH v6 11/23] drm/rockchip: dw_hdmi: Use auto-generated tables Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29 ` [PATCH v6 12/23] drm/rockchip: dw_hdmi: drop mode_valid hook Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29 ` [PATCH v6 13/23] drm/rockchip: dw_hdmi: Set cur_ctr to 0 always Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17 14:00   ` Dmitry Osipenko
2022-02-17 14:00     ` Dmitry Osipenko
2022-02-17 14:00     ` Dmitry Osipenko
2022-02-17 14:00     ` Dmitry Osipenko
2022-02-17 15:12     ` Sascha Hauer [this message]
2022-02-17 15:12       ` Sascha Hauer
2022-02-17 15:12       ` Sascha Hauer
2022-02-17 15:12       ` Sascha Hauer
2022-02-17 17:00       ` Dmitry Osipenko
2022-02-17 17:00         ` Dmitry Osipenko
2022-02-17 17:00         ` Dmitry Osipenko
2022-02-17 17:00         ` Dmitry Osipenko
2022-02-17  8:29 ` [PATCH v6 14/23] drm/rockchip: dw_hdmi: add default 594Mhz clk for 4K@60hz Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29 ` [PATCH v6 15/23] dt-bindings: display: rockchip: dw-hdmi: Make unwedge pinctrl optional Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29 ` [PATCH v6 16/23] arm64: dts: rockchip: rk356x: Add VOP2 nodes Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29 ` [PATCH v6 17/23] arm64: dts: rockchip: rk356x: Add HDMI nodes Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-21  8:54   ` Aw: " Frank Wunderlich
2022-02-21  8:54     ` Frank Wunderlich
2022-02-21  8:54     ` Frank Wunderlich
2022-02-21  8:54     ` Frank Wunderlich
2022-02-21  9:53     ` Sascha Hauer
2022-02-21  9:53       ` Sascha Hauer
2022-02-21  9:53       ` Sascha Hauer
2022-02-21  9:53       ` Sascha Hauer
2022-02-17  8:29 ` [PATCH v6 18/23] arm64: dts: rockchip: rk3568-evb: Enable VOP2 and hdmi Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29 ` [PATCH v6 19/23] arm64: dts: rockchip: enable vop2 and hdmi tx on quartz64a Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29 ` [PATCH v6 20/23] drm/rockchip: Make VOP driver optional Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29 ` [PATCH v6 21/23] drm: rockchip: Add VOP2 driver Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17 12:00   ` Andy Yan
2022-02-17 12:00     ` Andy Yan
2022-02-17 12:00     ` Andy Yan
2022-02-17 13:58     ` Sascha Hauer
2022-02-17 13:58       ` Sascha Hauer
2022-02-17 13:58       ` Sascha Hauer
2022-02-17 13:58       ` Sascha Hauer
2022-02-17 14:06       ` Heiko Stübner
2022-02-17 14:06         ` Heiko Stübner
2022-02-17 14:06         ` Heiko Stübner
2022-02-17 14:06         ` Heiko Stübner
2022-02-18  3:50         ` Andy Yan
2022-02-18  3:50           ` Andy Yan
2022-02-18  3:50           ` Andy Yan
2022-02-18  3:50           ` Andy Yan
2022-02-18  8:00           ` Sascha Hauer
2022-02-18  8:00             ` Sascha Hauer
2022-02-18  8:00             ` Sascha Hauer
2022-02-18  8:00             ` Sascha Hauer
2022-02-19  7:35             ` Andy Yan
2022-02-19  7:35               ` Andy Yan
2022-02-19  7:35               ` Andy Yan
2022-02-19  7:35               ` Andy Yan
2022-02-24  8:19               ` Sascha Hauer
2022-02-24  8:19                 ` Sascha Hauer
2022-02-24  8:19                 ` Sascha Hauer
2022-02-24  8:19                 ` Sascha Hauer
2022-02-24 10:54                 ` Andy Yan
2022-02-24 10:54                   ` Andy Yan
2022-02-24 10:54                   ` Andy Yan
2022-02-24 10:54                   ` Andy Yan
2022-02-24 12:50                   ` Sascha Hauer
2022-02-24 12:50                     ` Sascha Hauer
2022-02-24 12:50                     ` Sascha Hauer
2022-02-24 12:50                     ` Sascha Hauer
2022-02-17 13:24   ` Dmitry Osipenko
2022-02-17 13:24     ` Dmitry Osipenko
2022-02-17 13:24     ` Dmitry Osipenko
2022-02-17 13:24     ` Dmitry Osipenko
2022-02-24  7:47     ` Sascha Hauer
2022-02-24  7:47       ` Sascha Hauer
2022-02-24  7:47       ` Sascha Hauer
2022-02-24  7:47       ` Sascha Hauer
2022-02-24 14:36       ` Dmitry Osipenko
2022-02-24 14:36         ` Dmitry Osipenko
2022-02-24 14:36         ` Dmitry Osipenko
2022-02-24 14:36         ` Dmitry Osipenko
2022-02-24 14:47         ` Sascha Hauer
2022-02-24 14:47           ` Sascha Hauer
2022-02-24 14:47           ` Sascha Hauer
2022-02-24 14:47           ` Sascha Hauer
2022-02-21 11:51   ` Andy Yan
2022-02-21 11:51     ` Andy Yan
2022-02-21 11:51     ` Andy Yan
2022-02-21 18:18     ` Lucas Stach
2022-02-21 18:18       ` Lucas Stach
2022-02-21 18:18       ` Lucas Stach
2022-02-17  8:29 ` [PATCH v6 22/23] dt-bindings: display: rockchip: Add binding for VOP2 Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29 ` [PATCH v6 23/23] dt-bindings: display: rockchip: dw-hdmi: fix ports description Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-17  8:29   ` Sascha Hauer
2022-02-23 15:55   ` Rob Herring
2022-02-23 15:55     ` Rob Herring
2022-02-23 15:55     ` Rob Herring
2022-02-23 15:55     ` Rob Herring
2022-02-17 10:07 ` [PATCH v6 00/23] drm/rockchip: RK356x VOP2 support Frank Wunderlich

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