From: Matthias Brugger <mbrugger@xxxxxxxx> This is version five of the series. It's a long time this wasn't worked on, so as a reminder, version four can be found here: https://patchwork.kernel.org/cover/10686247/ The biggest changes this new version does, is to implement the clock probing through a platform driver. The corresponding platform device get's created in the DRM driver. I converted all the clock drivers to platform drivers and tested the approach on the Acer Chromebook R13 (mt8173 based). Apart from that I reordered the patches so that the DT bindings update are the first patches. Changes since v5: - re-arrange the patch order - generate platform_device for mmsys clock driver inside the DRM driver - fix DTS binding accordingly - switch all mmsys clock driver to platform probing - fix mt8173 platform driver remove function - fix probe defer path in HDMI driver - fix probe defer path in mtk_mdp_comp - fix identation of error messages Changes since v4: - fix missing regmap accessors in drm diver (patch 1) - omit probe deffered warning on all drivers (patch 5) - update drm and clk bindings (patch 6 and 7) - put mmsys clock part in dts child node of mmsys. Only done for HW where no dts backport compatible breakage is expected (either DRM driver not yet implemented or no HW available to the public) (patch 9 to 12) Changes since v3: - use platform device to probe clock driver - add Acked-by CK Hu for the probe deferred patch Changes since v2: - fix kconfig typo (shame on me) - delete __initconst from mm_clocks as converted to a platform driver Changes since v1: - add binding documentation - ddp: use regmap_update_bits - ddp: ignore EPROBE_DEFER on clock probing - mfd: delete mmsys_private - add Reviewed-by and Acked-by tags MMSYS in Mediatek SoCs has some registers to control clock gates (which is used in the clk driver) and some registers to set the routing and enable the differnet blocks of the display subsystem. Up to now both drivers, clock and drm are probed with the same device tree compatible. But only the first driver get probed, which in effect breaks graphics on mt8173 and mt2701. This patch uses a platform device registration in the DRM driver, which will trigger the probe of the corresponding clock driver. It was tested on the bananapi-r2 and the Acer R13 Chromebook. Matthias Brugger (12): dt-bindings: display: mediatek: Add mmsys binding description dt-bindings: mediatek: Add compatible for mt7623 drm/mediatek: Use regmap for register access drm: mediatek: Omit warning on probe defers media: mtk-mdp: Check return value of of_clk_get clk: mediatek: mt2701: switch mmsys to platform device probing clk: mediatek: mt2712e: switch to platform device probing clk: mediatek: mt6779: switch mmsys to platform device probing clk: mediatek: mt6797: switch to platform device probing clk: mediatek: mt8183: switch mmsys to platform device probing clk: mediatek: mt8173: switch mmsys to platform device probing drm/mediatek: Add support for mmsys through a pdev .../display/mediatek/mediatek,disp.txt | 30 ++++++----- drivers/clk/mediatek/clk-mt2701-mm.c | 41 +++++++++----- drivers/clk/mediatek/clk-mt2712-mm.c | 39 +++++++++----- drivers/clk/mediatek/clk-mt6779-mm.c | 41 +++++++++----- drivers/clk/mediatek/clk-mt6797-mm.c | 43 ++++++++++----- drivers/clk/mediatek/clk-mt8173.c | 51 +++++++++++++++--- drivers/clk/mediatek/clk-mt8183-mm.c | 39 +++++++++----- drivers/gpu/drm/mediatek/mtk_disp_color.c | 5 +- drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 5 +- drivers/gpu/drm/mediatek/mtk_disp_rdma.c | 5 +- drivers/gpu/drm/mediatek/mtk_dpi.c | 12 +++-- drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 4 +- drivers/gpu/drm/mediatek/mtk_drm_ddp.c | 54 +++++++++---------- drivers/gpu/drm/mediatek/mtk_drm_ddp.h | 4 +- drivers/gpu/drm/mediatek/mtk_drm_drv.c | 35 +++++++++--- drivers/gpu/drm/mediatek/mtk_drm_drv.h | 4 +- drivers/gpu/drm/mediatek/mtk_dsi.c | 8 ++- drivers/gpu/drm/mediatek/mtk_hdmi.c | 4 +- drivers/media/platform/mtk-mdp/mtk_mdp_comp.c | 6 +++ 19 files changed, 295 insertions(+), 135 deletions(-) -- 2.24.0
