[PATCH v4 00/12] drm/vc4: hdmi: Support the 4k @ 60Hz modes

[Maxime Ripard]

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

---

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 (12):
  drm/vc4: txp: Properly set the possible_crtcs mask
  drm/vc4: crtc: Skip the TXP
  drm/vc4: crtc: Pass the drm_atomic_state to config_pv
  drm/vc4: crtc: Fix vc4_get_crtc_encoder logic
  drm/vc4: crtc: Lookup the encoder from the register at boot
  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: Add a workqueue to set scrambling
  drm/vc4: hdmi: Raise the maximum clock rate

 drivers/gpu/drm/vc4/vc4_crtc.c      |  66 ++++++++++---
 drivers/gpu/drm/vc4/vc4_drv.c       |  11 ++-
 drivers/gpu/drm/vc4/vc4_hdmi.c      | 147 ++++++++++++++++++++++++++--
 drivers/gpu/drm/vc4/vc4_hdmi.h      |  10 ++
 drivers/gpu/drm/vc4/vc4_hdmi_regs.h |   3 +
 drivers/gpu/drm/vc4/vc4_txp.c       |   2 +-
 6 files changed, 217 insertions(+), 22 deletions(-)

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2.31.1