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.
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
---
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 (9):
drm/vc4: txp: Properly set the possible_crtcs mask
drm/vc4: crtc: Skip the TXP
drm/vc4: Rework the encoder retrieval code
drm/vc4: hdmi: Prevent clock unbalance
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
drivers/gpu/drm/vc4/vc4_crtc.c | 28 ++++++-
drivers/gpu/drm/vc4/vc4_drv.c | 47 ++++++++++-
drivers/gpu/drm/vc4/vc4_drv.h | 10 +++
drivers/gpu/drm/vc4/vc4_hdmi.c | 122 ++++++++++++++++++++++++++--
drivers/gpu/drm/vc4/vc4_hdmi.h | 8 ++
drivers/gpu/drm/vc4/vc4_hdmi_regs.h | 3 +
drivers/gpu/drm/vc4/vc4_txp.c | 2 +-
7 files changed, 207 insertions(+), 13 deletions(-)
--
2.30.2
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