linux-kernel - Re: [PATCH RFC v2 0/2] drm/meson: vclk: revert and re-fix vclk calculations

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Message-Id: <174530715197.2805907.16376775353354108716.b4-ty@linaro.org>
Date: Tue, 22 Apr 2025 09:32:31 +0200
From: Neil Armstrong <neil.armstrong@...aro.org>
To: dri-devel@...ts.freedesktop.org, linux-amlogic@...ts.infradead.org, 
 Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc: christianshewitt@...il.com, linux-arm-kernel@...ts.infradead.org, 
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC v2 0/2] drm/meson: vclk: revert and re-fix vclk
 calculations

Hi,

On Mon, 21 Apr 2025 22:12:58 +0200, Martin Blumenstingl wrote:
> This is a successor of a previous patchset by Christian [0]
> 
> Patch 1 reverts a previous fix for loss of HDMI sync when playing YUV420
> @ 59.94 media. The patch does resolve a calculation issue. It also makes
> all fractional rates invalid which is a bigger problem.
> 
> Patch 2 changes the whole drm/meson driver to use Hz as unit for clocks/
> frequencies. And importantly it uses the relevant 64-bit maths helpers so
> the code can still be compiled using for 32-bit ARM.
> Maxime previously suggested using drm_hdmi_compute_mode_clock(). That's
> still something to implement with future patches.
> 
> [...]

Thanks, Applied to https://gitlab.freedesktop.org/drm/misc/kernel.git (drm-misc-fixes)

[1/2] Revert "drm/meson: vclk: fix calculation of 59.94 fractional rates"
      https://gitlab.freedesktop.org/drm/misc/kernel/-/commit/f37bb5486ea536c1d61df89feeaeff3f84f0b560
[2/2] drm/meson: use unsigned long long / Hz for frequency types
      https://gitlab.freedesktop.org/drm/misc/kernel/-/commit/1017560164b6bbcbc93579266926e6e96675262a

-- 
Neil