Cristian, I'm hacking with adding cec support for rk3588 hdmi on 6.10-rc7 mainline. Cec kernel module is my backport from bsp. Module loads. Cec line (observed on osciloscope) has pulses when i'm issuing i.e. cec-ctl -d /dev/cec0 --phys-addr=1.0.0.0 —playback My issue is that timings are 2,9 times longer that should be (start bit is 10,7mS instead of 3.6; zero is 4.4 instead 1.5 while one is 1,7 instead of 0.6). This suggests me issue is cec clock isn't? Looking on bsp code https://github.com/radxa/kernel/blob/linux-6.1-stan-rkr1/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp-cec.c#L186 there is nothing with clock. So probably issue is in 3588 clk code, or…… Maybe you have some hints how to move forward with this issue? > Wiadomość napisana przez Cristian Ciocaltea <cristian.ciocaltea@xxxxxxxxxxxxx> w dniu 01.06.2024, o godz. 15:12: > > The RK3588 SoC family integrates a Quad-Pixel (QP) variant of the > Synopsys DesignWare HDMI TX controller used in the previous SoCs. > > It is HDMI 2.1 compliant and supports the following features, among > others: > > * Fixed Rate Link (FRL) > * 4K@120Hz and 8K@60Hz video modes > * Variable Refresh Rate (VRR) including Quick Media Switching (QMS) > * Fast Vactive (FVA) > * SCDC I2C DDC access > * TMDS Scrambler enabling 2160p@60Hz with RGB/YCbCr4:4:4 > * YCbCr4:2:0 enabling 2160p@60Hz at lower HDMI link speeds > * Multi-stream audio > * Enhanced Audio Return Channel (EARC) > > This is the last required component that needs to be supported in order > to enable the HDMI output functionality on the RK3588 based SBCs, such > as the RADXA Rock 5B. The other components are the Video Output > Processor (VOP2) and the Samsung IP based HDMI/eDP TX Combo PHY, for > which basic support has been already made available via [1] and [2], > respectively. > > The patches are grouped as follows: > * PATCH 1..7: DW HDMI TX driver refactor to minimize code duplication in > the new QP driver (no functional changes intended) > > * PATCH 8..11: Rockchip DW HDMI glue driver cleanup/improvements (no > functional changes intended) > > * PATCH 12..13: The new DW HDMI QP TX driver reusing the previously > exported functions and structs from existing DW HDMI TX driver > > * PATCH 14: Rockchip DW HDMI glue driver update to support RK3588 and > make use of DW HDMI QP TX > > They provide just the basic HDMI support for now, i.e. RGB output up to > 4K@60Hz, without audio, CEC or any of the HDMI 2.1 specific features. > Also note the vop2 driver is currently not able to properly handle all > display modes supported by the connected screens, e.g. it doesn't cope > with non-integer refresh rates. > > A possible workaround consists of enabling the display controller to > make use of the clock provided by the HDMI PHY PLL. This is still work > in progress and will be submitted later, as well as the required DTS > updates. > > To facilitate testing and experimentation, all HDMI output related > patches, including those part of this series, are available at [3]. > So far I could only verify this on the RADXA Rock 3A and 5B boards. > > Thanks, > Cristian > > [1]: 5a028e8f062f ("drm/rockchip: vop2: Add support for rk3588") > [2]: 553be2830c5f ("phy: rockchip: Add Samsung HDMI/eDP Combo PHY driver") > [3]: https://gitlab.collabora.com/hardware-enablement/rockchip-3588/linux/-/commits/rk3588-hdmi-bridge-v6.10-rc1 > > Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@xxxxxxxxxxxxx> > --- > Cristian Ciocaltea (14): > drm/bridge: dw-hdmi: Simplify clock handling > drm/bridge: dw-hdmi: Add dw-hdmi-common.h header > drm/bridge: dw-hdmi: Commonize dw_hdmi_i2c_adapter() > drm/bridge: dw-hdmi: Factor out AVI infoframe setup > drm/bridge: dw-hdmi: Factor out vmode setup > drm/bridge: dw-hdmi: Factor out hdmi_data_info setup > drm/bridge: dw-hdmi: Commonize dw_hdmi_connector_create() > drm/rockchip: dw_hdmi: Use modern drm_device based logging > drm/rockchip: dw_hdmi: Simplify clock handling > drm/rockchip: dw_hdmi: Use devm_regulator_get_enable() > drm/rockchip: dw_hdmi: Drop superfluous assignments of mpll_cfg, cur_ctr and phy_config > dt-bindings: display: rockchip,dw-hdmi: Add compatible for RK3588 > drm/bridge: synopsys: Add DW HDMI QP TX controller driver > drm/rockchip: dw_hdmi: Add basic RK3588 support > > .../display/rockchip/rockchip,dw-hdmi.yaml | 127 +++- > drivers/gpu/drm/bridge/synopsys/Makefile | 2 +- > drivers/gpu/drm/bridge/synopsys/dw-hdmi-common.h | 179 +++++ > drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c | 787 +++++++++++++++++++ > drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.h | 831 +++++++++++++++++++++ > drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 353 +++------ > drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 351 +++++++-- > include/drm/bridge/dw_hdmi.h | 8 + > 8 files changed, 2290 insertions(+), 348 deletions(-) > --- > base-commit: 1613e604df0cd359cf2a7fbd9be7a0bcfacfabd0 > change-id: 20240601-b4-rk3588-bridge-upstream-a27baff1b8fc > > > _______________________________________________ > Linux-rockchip mailing list > Linux-rockchip@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/linux-rockchip
