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 and force_turbo options.
The firmware also has a glitch at the moment and will not properly release the BSC controllers, which will make the EDID retrieval fail.
We can work around this using the following config.txt options:
disable_fw_kms_setup=1 hdmi_edid_file:0=1 hdmi_edid_filename:0=1366x768.bin hdmi_ignore_edid:0=1 hdmi_edid_file:1=1 hdmi_edid_filename:1=1366x768.bin hdmi_ignore_edid:1=1
A fix will come for the firmware eventually.
Let me know what you think, Maxime
Maxime Ripard (8): clk: Add range accessors drm/vc4: hvs: Make the HVS bind first drm/vc4: hdmi: Properly compute the BVB clock rate drm/vc4: hdmi: Check and warn if we can't reach 4kp60 frequencies drm/vc4: hdmi: Enable the scrambler drm/vc4: hdmi: Raise the maximum clock rate drm/vc4: plane: Fix typo in scaler width and height drm/vc4: plane: Remove redundant assignment
drivers/clk/clk.c | 30 ++++++++++ drivers/gpu/drm/vc4/vc4_drv.c | 11 +++- drivers/gpu/drm/vc4/vc4_hdmi.c | 88 ++++++++++++++++++++++++++--- drivers/gpu/drm/vc4/vc4_hdmi.h | 8 +++ drivers/gpu/drm/vc4/vc4_hdmi_regs.h | 3 + drivers/gpu/drm/vc4/vc4_plane.c | 5 +- include/linux/clk.h | 16 ++++++ 7 files changed, 148 insertions(+), 13 deletions(-)