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.

Neil, I'd like to hear your feedback on this approach.


[0] https://lore.kernel.org/linux-amlogic/20250110074458.3624094-1-christianshewitt@gmail.com/


Christian Hewitt (1):
  Revert "drm/meson: vclk: fix calculation of 59.94 fractional rates"

Martin Blumenstingl (1):
  drm/meson: use unsigned long long / Hz for frequency types

 drivers/gpu/drm/meson/meson_drv.c          |   2 +-
 drivers/gpu/drm/meson/meson_drv.h          |   2 +-
 drivers/gpu/drm/meson/meson_encoder_hdmi.c |  29 +--
 drivers/gpu/drm/meson/meson_vclk.c         | 195 +++++++++++----------
 drivers/gpu/drm/meson/meson_vclk.h         |  13 +-
 5 files changed, 126 insertions(+), 115 deletions(-)

-- 
2.49.0

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

On 21/04/2025 22:12, 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.
> 
> Neil, I'd like to hear your feedback on this approach.
> 
> 
> [0] https://lore.kernel.org/linux-amlogic/20250110074458.3624094-1-christianshewitt@gmail.com/
> 
> 
> Christian Hewitt (1):
>    Revert "drm/meson: vclk: fix calculation of 59.94 fractional rates"
> 
> Martin Blumenstingl (1):
>    drm/meson: use unsigned long long / Hz for frequency types
> 
>   drivers/gpu/drm/meson/meson_drv.c          |   2 +-
>   drivers/gpu/drm/meson/meson_drv.h          |   2 +-
>   drivers/gpu/drm/meson/meson_encoder_hdmi.c |  29 +--
>   drivers/gpu/drm/meson/meson_vclk.c         | 195 +++++++++++----------
>   drivers/gpu/drm/meson/meson_vclk.h         |  13 +-
>   5 files changed, 126 insertions(+), 115 deletions(-)
> 

Thanks for re-spinning, will apply.

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>

Thanks !