Hi,
Here is a series that enables the higher resolutions on the HDMI0 Controller found in the BCM2711 (RPi4).
In order to work it needs a few adjustments to config.txt, most notably to enable the enable_hdmi_4kp60 option.
Let me know what you think, Maxime
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Changes from v6: - Rebased on current drm-misc-next - Removed stale clk_request pointer
Changes from v5: - Fixed unused variables warning
Changes from v4: - Removed the patches already applied - Added various fixes for the issues that have been discovered on the downstream tree
Changes from v3: - Rework the encoder retrieval code that was broken on the RPi3 and older - Fix a scrambling enabling issue on some display
Changes from v2: - Gathered the various tags - Added Cc stable when relevant - Split out the check to test whether the scrambler is required into an helper - Fixed a bug where the scrambler state wouldn't be tracked properly if it was enabled at boot
Changes from v1: - Dropped the range accessors - Drop the mention of force_turbo - Reordered the SCRAMBLER_CTL register to match the offset - Removed duplicate HDMI_14_MAX_TMDS_CLK define - Warn about enable_hdmi_4kp60 only if there's some modes that can't be reached - Rework the BVB clock computation
Maxime Ripard (10): drm/vc4: hdmi: Remove the DDC probing for status detection drm/vc4: hdmi: Fix HPD GPIO detection drm/vc4: Make vc4_crtc_get_encoder public drm/vc4: crtc: Add encoder to vc4_crtc_config_pv prototype drm/vc4: crtc: Rework the encoder retrieval code (again) drm/vc4: crtc: Add some logging drm/vc4: Leverage the load tracker on the BCM2711 drm/vc4: hdmi: Raise the maximum clock rate drm/vc4: hdmi: Enable the scrambler on reconnection drm/vc4: Increase the core clock based on HVS load
drivers/gpu/drm/vc4/vc4_crtc.c | 60 ++++++++------ drivers/gpu/drm/vc4/vc4_debugfs.c | 7 +- drivers/gpu/drm/vc4/vc4_drv.h | 8 +- drivers/gpu/drm/vc4/vc4_hdmi.c | 20 +++-- drivers/gpu/drm/vc4/vc4_kms.c | 126 +++++++++++++++++++++++++----- drivers/gpu/drm/vc4/vc4_plane.c | 5 -- 6 files changed, 163 insertions(+), 63 deletions(-)