ARC AXS10x platforms consist of a mainboard with several peripherals. One of those peripherals is an HDMI output port controlled by the ADV7511 transmitter.
This patch set adds I2S audio for the AXS10x platform.
NOTE: Although the mainline I2S driver uses ALSA DMA engine, this controller can be built without DMA support so it was necessary to add this custom platform driver so that HDMI audio works in AXS boards.
Changes v6 -> v7: * Discard the use of memcpy * Report IRQ_HANDLED only when there is an IRQ * Use interrupts to check if PIO mode is in use * Unmask interrupts only when in PIO mode * Remove empty functions
Changes v5 -> v6: * Use SNDRV_DMA_TYPE_CONTINUOUS
Changes v4 -> v5: * Resolve undefined references when compiling as module * Dropped adv7511 audio patches * Use DMA properties in I2S to check which mode to use: PIO or DMA (as suggested by Lars-Peter Clausen)
Changes v3 -> v4: * Reintroduced custom PCM driver (see note below) * Use DT boolean to switch between ALSA DMA engine PCM or custom PCM * Use fifo depth to program I2S FCR * Update I2S documentation
Changes v2 -> v3: * Removed pll_config functions (as suggested by Alexey Brodkin) * Removed HDMI start at adv7511_core (as suggested by Archit Taneja) * Use NOP functions for adv7511_audio (as suggested by Archit Taneja) * Added adv7511_audio_exit() function (as suggested by Archit Taneja) * Moved adv7511 to its own folder (as suggested by Archit Taneja) * Separated file rename of adv7511_core (as suggested by Emil Velikov) * Compile adv7511 as module if ALSA SoC is compiled as module * Load adv7511 audio only if declared in device tree (as suggested by Laurent Pinchart) * Dropped custom platform driver, using now ALSA DMA engine * Dropped IRQ handler for I2S
Changes v1 -> v2: * DT bindings moved to separate patch (as suggested by Alexey Brodkin) * Removed defconfigs entries (as suggested by Alexey Brodkin)
Cc: Carlos Palminha palminha@synopsys.com Cc: Mark Brown broonie@kernel.org Cc: Liam Girdwood lgirdwood@gmail.com Cc: Jaroslav Kysela perex@perex.cz Cc: Takashi Iwai tiwai@suse.com Cc: Rob Herring robh@kernel.org Cc: Alexey Brodkin abrodkin@synopsys.com Cc: linux-snps-arc@lists.infradead.org Cc: alsa-devel@alsa-project.org Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org
Jose Abreu (4): ASoC: dwc: Add helper functions to disable/enable irqs ASoC: dwc: Do not use devm_clk_get() if using platform data ASoC: dwc: Add PIO PCM extension ASoC: dwc: Add irq parameter to DOCUMENTATION
.../devicetree/bindings/sound/designware-i2s.txt | 4 + sound/soc/dwc/Kconfig | 9 + sound/soc/dwc/Makefile | 5 +- sound/soc/dwc/designware_i2s.c | 229 ++++++++++----------- sound/soc/dwc/designware_pcm.c | 220 ++++++++++++++++++++ sound/soc/dwc/local.h | 122 +++++++++++ 6 files changed, 467 insertions(+), 122 deletions(-) create mode 100644 sound/soc/dwc/designware_pcm.c create mode 100644 sound/soc/dwc/local.h