[PATCH v3 0/3] drm: xlnx: zynqmp: Add DP audio support

[Tomi Valkeinen]

Add DisplayPort audio support for Xilinx ZynqMP platforms.

This depends on patch adding cyclic DMA mode for DPDMA driver:

https://lore.kernel.org/all/20240228042124.3074044-3-vishal.sagar@amd.com/

If that patch is missing, starting an audio playback will fail with an
ASoC error. The cyclic DMA patch has recently been accepted to the DMA
tree.

The current DT is, for some reason, missing the DMA channels for the
audio. This series adds that to the bindings and the dts file, but to
support older dtb files without the audio DMA, the driver will not fail
if the audio DMA is missing, but will just mark the audio support as
disabled.

To: Lars-Peter Clausen <lars at metafoo.de>
To: Jaroslav Kysela <perex at perex.cz>
To: Takashi Iwai <tiwai at suse.com>
To: Liam Girdwood <lgirdwood at gmail.com>
To: Mark Brown <broonie at kernel.org>
To: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
To: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
To: Maxime Ripard <mripard at kernel.org>
To: Thomas Zimmermann <tzimmermann at suse.de>
To: David Airlie <airlied at gmail.com>
To: Daniel Vetter <daniel at ffwll.ch>
To: Rob Herring <robh+dt at kernel.org>
To: Krzysztof Kozlowski <krzysztof.kozlowski+dt at linaro.org>
To: Conor Dooley <conor+dt at kernel.org>
To: Michal Simek <michal.simek at amd.com>
To: Krzysztof Kozlowski <krzk+dt at kernel.org>
Cc: linux-sound at vger.kernel.org
Cc: linux-kernel at vger.kernel.org
Cc: dri-devel at lists.freedesktop.org
Cc: devicetree at vger.kernel.org
Cc: linux-arm-kernel at lists.infradead.org
Cc: Vishal Sagar <vishal.sagar at amd.com>
Cc: Anatoliy Klymenko <anatoliy.klymenko at amd.com>
Cc: Péter Ujfalusi <peter.ujfalusi at gmail.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen at ideasonboard.com>

Changes in v3:
- Expand the description in "dt-bindings: display/xlnx/zynqmp-dpsub: Add
  audio DMAs" to be more clear about the DT binding change.
- Rebased on top of current upstream
- Link to v2: https://lore.kernel.org/r/20240319-xilinx-dp-audio-v2-0-92d6d3a7ca7e@ideasonboard.com

Changes in v2:
- Fix a missing double-quote in the DT binding
- Link to v1: https://lore.kernel.org/r/20240312-xilinx-dp-audio-v1-0-696c79facbb9@ideasonboard.com

---
Tomi Valkeinen (3):
      dt-bindings: display/xlnx/zynqmp-dpsub: Add audio DMAs
      arm64: dts: zynqmp: Add DMA for DP audio
      drm: xlnx: zynqmp_dpsub: Add DP audio support

 .../bindings/display/xlnx/xlnx,zynqmp-dpsub.yaml   |  10 +-
 arch/arm64/boot/dts/xilinx/zynqmp.dtsi             |   7 +-
 drivers/gpu/drm/xlnx/Kconfig                       |   9 +
 drivers/gpu/drm/xlnx/Makefile                      |   1 +
 drivers/gpu/drm/xlnx/zynqmp_disp.c                 |  48 ---
 drivers/gpu/drm/xlnx/zynqmp_disp_regs.h            |   7 +-
 drivers/gpu/drm/xlnx/zynqmp_dp.c                   |  54 ++-
 drivers/gpu/drm/xlnx/zynqmp_dp.h                   |   7 +
 drivers/gpu/drm/xlnx/zynqmp_dp_audio.c             | 461 +++++++++++++++++++++
 drivers/gpu/drm/xlnx/zynqmp_dpsub.c                |  39 +-
 drivers/gpu/drm/xlnx/zynqmp_dpsub.h                |  15 +-
 11 files changed, 553 insertions(+), 105 deletions(-)
---
base-commit: 431c1646e1f86b949fa3685efc50b660a364c2b6
change-id: 20240312-xilinx-dp-audio-468ad12f9f64

Best regards,
-- 
Tomi Valkeinen <tomi.valkeinen at ideasonboard.com>