linux-kernel - RE: [PATCH v8 2/6] clk: renesas: rzv2h-cpg: Add support for DSI clocks

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID:
 <TY3PR01MB113460EF10FB5D9067D61358F8609A@TY3PR01MB11346.jpnprd01.prod.outlook.com>
Date: Thu, 11 Sep 2025 14:30:42 +0000
From: Biju Das <biju.das.jz@...renesas.com>
To: Tomi Valkeinen <tomi.valkeinen+renesas@...asonboard.com>, "Lad, Prabhakar"
	<prabhakar.csengg@...il.com>
CC: "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>,
	"linux-renesas-soc@...r.kernel.org" <linux-renesas-soc@...r.kernel.org>,
	"linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>, Fabrizio Castro
	<fabrizio.castro.jz@...esas.com>, Tommaso Merciai
	<tommaso.merciai.xr@...renesas.com>, Prabhakar Mahadev Lad
	<prabhakar.mahadev-lad.rj@...renesas.com>, Andrzej Hajda
	<andrzej.hajda@...el.com>, Neil Armstrong <neil.armstrong@...aro.org>, Robert
 Foss <rfoss@...nel.org>, laurent.pinchart
	<laurent.pinchart@...asonboard.com>, Jonas Karlman <jonas@...boo.se>, Jernej
 Skrabec <jernej.skrabec@...il.com>, Maarten Lankhorst
	<maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>, Rob Herring <robh@...nel.org>, Krzysztof
 Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Geert
 Uytterhoeven <geert+renesas@...der.be>, Michael Turquette
	<mturquette@...libre.com>, Stephen Boyd <sboyd@...nel.org>, magnus.damm
	<magnus.damm@...il.com>
Subject: RE: [PATCH v8 2/6] clk: renesas: rzv2h-cpg: Add support for DSI
 clocks

Hi Tomi,

> -----Original Message-----
> From: Tomi Valkeinen <tomi.valkeinen+renesas@...asonboard.com>
> Sent: 11 September 2025 15:26
> Subject: Re: [PATCH v8 2/6] clk: renesas: rzv2h-cpg: Add support for DSI clocks
> 
> Hi,
> 
> 
> In fact, if the DSI is so picky about the rate, I find the HW design
> odd: in g2l the pixel clock and the DSI clock come from a single source, which keeps them neatly in
> sync. If that is required, why change the design here so that the DSI PLL is independent of the pixel
> clock, yet still the DSI PLL must be programmed to be exactly matched to the pixel clock.

G2L DSI is from Renesas where as V2H from different vendor. Hence the difference.

Cheers,
Biju