Il 03/11/23 11:25, AngeloGioacchino Del Regno ha scritto:
> Changes in v3:
> - Rebased on next-20231025
> - Added comment in the code explaining why the dp/edp parents lists
> are split in one PLL per interface
> - Added a commit performing the same reparenting on MT8188 as well
>
> Changes in v2:
> - Rebased on next-20231018
>
Hello Stephen,
friendly ping for this fully reviewed/tested series :-)
Cheers,
Angelo
> This series adds support to specify custom parent indices for MediaTek
> MUX clocks, necessary to avoid setting the same parent PLL for MT8195's
> top_dp and top_edp clocks, solving DP+eDP concurrent output issues.
>
> No fixes tags are provided as the clk-mux commit introduces new logic
> and the actual MT8195 fix depends on that.
>
> This commit was tested on the Acer Tomato Chromebook (MT8195) with
> dual concurrent display outputs (internal eDP panel and TypeC->DP->HDMI
> adapter connected to Samsung UE40JU6400 4k TV); resolution switch on
> DP was also tested; eDP output is not paused and internal display keeps
> working as expected.
>
>
> After feedback on v1 of this series (effectively the same as v2, except
> for the rebase), I looked for an alternative solution with using
> clk_set_rate_exclusive() as proposed. Couldn't find any, as that still
> doesn't give any guarantee about selecting the same PLL that the driver
> was manipulating before setting the right divider MUX, hence that still
> wouldn't work correctly.
>
> For more context, please look at the conversation at [1].
>
> Cheers!
>
> [1] https://lore.kernel.org/linux-arm-kernel/20230713072138.84117-1-angelogioacchino.delregno@collabora.com
>
> AngeloGioacchino Del Regno (3):
> clk: mediatek: clk-mux: Support custom parent indices for muxes
> clk: mediatek: mt8195-topckgen: Refactor parents for top_dp/edp muxes
> clk: mediatek: mt8188-topckgen: Refactor parents for top_dp/edp muxes
>
> drivers/clk/mediatek/clk-mt8188-topckgen.c | 27 +++++++-------
> drivers/clk/mediatek/clk-mt8195-topckgen.c | 27 ++++++++++----
> drivers/clk/mediatek/clk-mux.c | 14 +++++++
> drivers/clk/mediatek/clk-mux.h | 43 ++++++++++++++++++++--
> 4 files changed, 86 insertions(+), 25 deletions(-)
>