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2017-01-25ALSA: x86: hdmi: fix returnvar.cocci warningsJulia Lawall
Remove unneeded variable used to store return value. Generated by: scripts/coccinelle/misc/returnvar.cocci CC: Jerome Anand <jerome.anand@intel.com> Signed-off-by: Julia Lawall <julia.lawall@lip6.fr> Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-01-25ALSA: x86: fix resource_size.cocci warningskbuild test robot
sound/x86/intel_hdmi_lpe_audio.c:498:24-27: ERROR: Missing resource_size with res_mmio Use resource_size function on resource object instead of explicit computation. Generated by: scripts/coccinelle/api/resource_size.cocci CC: Jerome Anand <jerome.anand@intel.com> Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-01-25ALSA: x86: hdmi: continue playback even when display resolution changesJerome Anand
When the display resolution changes, the drm disables the display pipes due to which audio rendering stops. At this time, we need to ensure the existing audio pointers and buffers are cleared out so that the playback can restarted once the display pipe is enabled with a different N/CTS values Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Jerome Anand <jerome.anand@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-01-25ALSA: x86: hdmi: Add audio support for BYT and CHTJerome Anand
Hdmi audio driver based on the child platform device created by gfx driver is implemented. This audio driver is derived from legacy intel hdmi audio driver. The interfaces for interaction between gfx and audio are updated and the driver implementation updated to derive interrupts in its own address space based on irq chip framework The changes to calculate sub-period positions was triggered by David Henningsson <david.henningsson@canonical.com> and is accomodated in this patch Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Jerome Anand <jerome.anand@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2017-01-25ALSA: add Intel HDMI LPE audio driver for BYT/CHT-TJerome Anand
On Baytrail and Cherrytrail, HDaudio may be fused out or disabled by the BIOS. This driver enables an alternate path to the i915 display registers and DMA. Although there is no hardware path between i915 display and LPE/SST audio clusters, this HDMI capability is referred to in the documentation as "HDMI LPE Audio" so we keep the name for consistency. There is no hardware path or control dependencies with the LPE/SST DSP functionality. The hdmi-lpe-audio driver will be probed when the i915 driver creates a child platform device. Since this driver is neither SoC nor PCI, a new x86 folder is added Additional indirections in the code will be cleaned up in the next series to aid smoother DP integration Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Jerome Anand <jerome.anand@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>