From: Vasily Khoruzhick <anarsoul@gmail.com>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: devicetree <devicetree@vger.kernel.org>,
Maxime Ripard <maxime.ripard@bootlin.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
dri-devel <dri-devel@lists.freedesktop.org>,
Dave Airlie <airlied@linux.ie>,
linux-sunxi <linux-sunxi@googlegroups.com>,
Rob Herring <robh+dt@kernel.org>, Daniel Vetter <daniel@ffwll.ch>,
Chen-Yu Tsai <wens@csie.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Icenowy Zheng <icenowy@aosc.io>
Subject: Re: [PATCH 9/9] [DO NOT MERGE] drm/sun4i: rgb: Add 5% tolerance to dot clock frequency check
Date: Sat, 2 Feb 2019 17:32:42 -0800 [thread overview]
Message-ID: <CA+E=qVew_TFXQzz+7V6njG4w-Ay4YZND0FZ+8F2TRnhhOBb2Mg@mail.gmail.com> (raw)
In-Reply-To: <1585874.9P5eR8PMbl@avalon>
On Thu, Oct 18, 2018 at 4:31 AM Laurent Pinchart
<laurent.pinchart@ideasonboard.com> wrote:
> Given that the tolerance is a property of the panel or bridge, I agree with
> Daniel that it should be implemented there, or at least in cooperation with
> drm_panel and drm_bridge.
Clock tolerance is not specified in ANX6345 datasheet.
> Semi-related information, I think the CEA and VESA standards allow a 0.5%
> clock tolerance. What is the maximum clock frequency deviation required for
> this platform ?
This particular platform requires ~1% deviation.
E.g. on Pinebook with 768p panel: requested clock: 73.0 MHz, real
clock: 72.296296 MHz (0.96%)
on Pinebook with 1080p panel: requested clock: 138.5 MHz, real clock:
138.461538 MHz (0.03%)
So unfortunately 0.5% is not enough.
Regards,
Vasily
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next prev parent reply other threads:[~2019-02-03 1:33 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-18 7:33 [PATCH 0/9] Analogix ANX6345 RGB-(e)DP bridge support Icenowy Zheng
2018-10-18 7:33 ` [PATCH 1/9] drm/bridge: move ANA78xx driver to analogix subdirectory Icenowy Zheng
2018-10-18 8:47 ` Laurent Pinchart
2018-10-18 7:33 ` [PATCH 2/9] drm/bridge: split some definitions of ANX78xx to dedicated headers Icenowy Zheng
2018-10-18 7:33 ` [PATCH 3/9] drm/bridge: extract some Analogix I2C DP common code Icenowy Zheng
2018-10-18 7:33 ` [PATCH 4/9] dt-bindings: Add ANX6345 DP/eDP transmitter binding Icenowy Zheng
2018-10-18 8:53 ` Laurent Pinchart
2018-10-18 10:00 ` Icenowy Zheng
2018-10-18 11:23 ` Laurent Pinchart
2018-10-18 12:40 ` Icenowy Zheng
2018-10-25 18:30 ` Rob Herring
2018-10-26 0:08 ` Icenowy Zheng
2018-10-18 7:33 ` [PATCH 5/9] drm/bridge: Add Analogix anx6345 support Icenowy Zheng
2018-10-18 7:33 ` [PATCH 6/9] arm64: allwinner: a64: add pinmux for RGB666 LCD Icenowy Zheng
2018-10-18 7:33 ` [PATCH 7/9] arm64: allwinner: a64: enable ANX6345 bridge on Pinebook Icenowy Zheng
2018-10-18 15:17 ` Vasily Khoruzhick
2018-10-19 5:50 ` Icenowy Zheng
2018-10-18 7:33 ` [PATCH 8/9] arm64: allwinner: a64: enable ANX6345 bridge on TERES-I Icenowy Zheng
2018-10-18 7:33 ` [PATCH 9/9] [DO NOT MERGE] drm/sun4i: rgb: Add 5% tolerance to dot clock frequency check Icenowy Zheng
2018-10-18 8:55 ` Laurent Pinchart
2018-10-18 9:18 ` Daniel Vetter
2018-10-18 9:42 ` Maxime Ripard
2018-10-18 11:31 ` Laurent Pinchart
2018-10-18 12:18 ` Maxime Ripard
2018-10-18 12:50 ` Icenowy Zheng
2018-10-18 13:07 ` Maxime Ripard
2018-10-18 13:57 ` Laurent Pinchart
2019-02-03 1:32 ` Vasily Khoruzhick [this message]
2018-10-29 2:20 ` [PATCH 0/9] Analogix ANX6345 RGB-(e)DP bridge support Vasily Khoruzhick
2019-02-04 12:22 ` Torsten Duwe
2019-02-04 20:21 ` Vasily Khoruzhick
2019-02-03 18:54 [PATCH RESEND v2 00/12] " Vasily Khoruzhick
2019-02-03 18:54 ` [PATCH RESEND v2 01/12] drm/bridge: move ANA78xx driver to analogix subdirectory Vasily Khoruzhick
2019-02-03 18:54 ` [PATCH RESEND v2 02/12] drm/bridge: split some definitions of ANX78xx to dedicated headers Vasily Khoruzhick
2019-02-03 18:54 ` [PATCH RESEND v2 03/12] drm/bridge: extract some Analogix I2C DP common code Vasily Khoruzhick
2019-02-03 18:54 ` [PATCH RESEND v2 04/12] dt-bindings: Add ANX6345 DP/eDP transmitter binding Vasily Khoruzhick
2019-02-03 18:54 ` [PATCH RESEND v2 05/12] drm/bridge: Add Analogix anx6345 support Vasily Khoruzhick
2019-02-05 13:19 ` Torsten Duwe
2019-02-03 18:54 ` [PATCH RESEND v2 06/12] drm/sun4i: rgb: Add 1% tolerance to dclk frequency check when bridge is connected Vasily Khoruzhick
2019-02-04 14:20 ` Maxime Ripard
2019-02-04 16:26 ` Vasily Khoruzhick
2019-02-04 16:28 ` Icenowy Zheng
2019-02-04 18:50 ` [linux-sunxi] " Vasily Khoruzhick
2019-02-05 15:41 ` Maxime Ripard
2019-02-05 17:49 ` Vasily Khoruzhick
2019-02-06 9:16 ` Maxime Ripard
2019-02-06 11:42 ` Thierry Reding
2019-02-03 18:54 ` [PATCH RESEND v2 07/12] drm/panel: simple: don't fail if we don't have panel desc Vasily Khoruzhick
2019-02-03 18:54 ` [PATCH RESEND v2 08/12] dt-bindings: add binding for generic eDP panel Vasily Khoruzhick
2019-02-04 7:43 ` Thierry Reding
2019-02-04 8:13 ` Vasily Khoruzhick
2019-02-04 8:23 ` Thierry Reding
2019-02-04 9:40 ` Daniel Vetter
2019-02-04 11:22 ` Thierry Reding
2019-02-04 15:59 ` Daniel Vetter
2019-02-04 16:22 ` Thierry Reding
2019-02-05 8:57 ` Daniel Vetter
2019-02-05 10:24 ` Thierry Reding
2019-02-05 16:36 ` Daniel Vetter
2019-02-14 19:51 ` Vasily Khoruzhick
2019-02-14 20:05 ` Vasily Khoruzhick
2019-02-14 20:38 ` Rob Herring
2019-02-14 20:54 ` Vasily Khoruzhick
2019-02-04 16:11 ` Vasily Khoruzhick
2019-02-04 16:27 ` Thierry Reding
2019-02-04 16:39 ` Rob Herring
2019-02-04 17:02 ` [linux-sunxi] " Vasily Khoruzhick
2019-02-04 16:27 ` Rob Herring
2019-02-04 16:56 ` Thierry Reding
2019-02-04 17:07 ` Vasily Khoruzhick
2019-02-04 20:23 ` Rob Herring
2019-02-04 20:26 ` Vasily Khoruzhick
2019-02-04 20:34 ` Rob Herring
2019-02-03 18:54 ` [PATCH RESEND v2 09/12] drm/panel: simple: add " Vasily Khoruzhick
2019-02-03 18:54 ` [PATCH RESEND v2 10/12] arm64: allwinner: a64: add pinmux for RGB666 LCD Vasily Khoruzhick
2019-02-03 18:55 ` [PATCH RESEND v2 11/12] arm64: allwinner: a64: enable LCD-related hardware for Pinebook Vasily Khoruzhick
2019-02-03 18:55 ` [PATCH RESEND v2 12/12] arm64: allwinner: a64: enable LCD-related hardware for TERES-I Vasily Khoruzhick
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