--- /dev/null
+/*
+ * intel_hdmi_lpe_audio.c - Intel HDMI LPE audio driver for Atom platforms
+ *
+ * Copyright (C) 2016 Intel Corp
+ * Authors:
+ * Jerome Anand <jerome.anand@intel.com>
+ * Aravind Siddappaji <aravindx.siddappaji@intel.com>
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <linux/platform_device.h>
+#include <linux/irqreturn.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/initval.h>
+#include <sound/control.h>
+#include <sound/initval.h>
+#include <drm/intel_lpe_audio.h>
+#include "intel_hdmi_lpe_audio.h"
+
+/* globals*/
+static struct platform_device *hlpe_pdev;
+static int hlpe_state;
+static union otm_hdmi_eld_t hlpe_eld;
+
+struct hdmi_lpe_audio_ctx {
+ int irq;
+ void __iomem *mmio_start;
+ had_event_call_back had_event_callbacks;
+ struct snd_intel_had_interface *had_interface;
+ void *had_pvt_data;
+ int tmds_clock_speed;
+ unsigned int had_config_offset;
+ int hdmi_audio_interrupt_mask;
+ struct work_struct hdmi_audio_wq;
+};
+
+static void hdmi_set_eld(void *eld)
+{
+ int size;
+
+ BUILD_BUG_ON(sizeof(hlpe_eld) > HDMI_MAX_ELD_BYTES);
+
+ size = sizeof(hlpe_eld);
+ memcpy((void *)&hlpe_eld, eld, size);
+}
+
+static int hdmi_get_eld(void *eld)
+{
+ u8 *eld_data = (u8 *)&hlpe_eld;
+
+ memcpy(eld, (void *)&hlpe_eld, sizeof(hlpe_eld));
+
+ print_hex_dump_bytes("eld: ", DUMP_PREFIX_NONE, eld_data,
+ sizeof(hlpe_eld));
+ return 0;
+}
+
+
+static struct hdmi_lpe_audio_ctx *get_hdmi_context(void)
+{
+ struct hdmi_lpe_audio_ctx *ctx;
+
+ ctx = platform_get_drvdata(hlpe_pdev);
+ return ctx;
+}
+
+/*
+ * return whether HDMI audio device is busy.
+ */
+bool mid_hdmi_audio_is_busy(void *ddev)
+{
+ struct hdmi_lpe_audio_ctx *ctx;
+ int hdmi_audio_busy = 0;
+ struct hdmi_audio_event hdmi_audio_event;
+
+ dev_dbg(&hlpe_pdev->dev, "%s: Enter", __func__);
+
+ ctx = platform_get_drvdata(hlpe_pdev);
+
+ if (hlpe_state == hdmi_connector_status_disconnected) {
+ /* HDMI is not connected, assuming audio device is idle. */
+ return false;
+ }
+
+ if (ctx->had_interface) {
+ hdmi_audio_event.type = HAD_EVENT_QUERY_IS_AUDIO_BUSY;
+ hdmi_audio_busy = ctx->had_interface->query(
+ ctx->had_pvt_data,
+ hdmi_audio_event);
+ return hdmi_audio_busy != 0;
+ }
+ return false;
+}
+
+/*
+ * return true if HDMI audio device is suspended/ disconnected
+ */
+bool mid_hdmi_audio_suspend(void *ddev)
+{
+ struct hdmi_lpe_audio_ctx *ctx;
+ struct hdmi_audio_event hdmi_audio_event;
+ int ret = 0;
+
+ ctx = platform_get_drvdata(hlpe_pdev);
+
+ if (hlpe_state == hdmi_connector_status_disconnected) {
+ /* HDMI is not connected, assuming audio device
+ * is suspended already.
+ */
+ return true;
+ }
+
+ dev_dbg(&hlpe_pdev->dev, "%s: hlpe_state %d", __func__,
+ hlpe_state);
+
+ if (ctx->had_interface) {
+ hdmi_audio_event.type = 0;
+ ret = ctx->had_interface->suspend(ctx->had_pvt_data,
+ hdmi_audio_event);
+ return (ret == 0) ? true : false;
+ }
+ return true;
+}
+
+void mid_hdmi_audio_resume(void *ddev)
+{
+ struct hdmi_lpe_audio_ctx *ctx;
+
+ ctx = platform_get_drvdata(hlpe_pdev);
+
+ if (hlpe_state == hdmi_connector_status_disconnected) {
+ /* HDMI is not connected, there is no need
+ * to resume audio device.
+ */
+ return;
+ }
+
+ dev_dbg(&hlpe_pdev->dev, "%s: hlpe_state %d", __func__, hlpe_state);
+
+ if (ctx->had_interface)
+ ctx->had_interface->resume(ctx->had_pvt_data);
+}
+
+void mid_hdmi_audio_signal_event(enum had_event_type event)
+{
+ struct hdmi_lpe_audio_ctx *ctx;
+
+ dev_dbg(&hlpe_pdev->dev, "%s: Enter\n", __func__);
+
+ ctx = platform_get_drvdata(hlpe_pdev);
+
+ /* The handler is protected in the respective
+ * event handlers to avoid races
+ */
+ if (ctx->had_event_callbacks)
+ (*ctx->had_event_callbacks)(event,
+ ctx->had_pvt_data);
+}
+
+/**
+ * used to write into display controller HDMI audio registers.
+ */
+static int hdmi_audio_write(u32 reg, u32 val)
+{
+ struct hdmi_lpe_audio_ctx *ctx;
+
+ ctx = platform_get_drvdata(hlpe_pdev);
+
+ dev_dbg(&hlpe_pdev->dev, "%s: reg[0x%x] = 0x%x\n", __func__, reg, val);
+
+ iowrite32(val, (ctx->mmio_start+reg));
+
+ return 0;
+}
+
+/**
+ * used to get the register value read from
+ * display controller HDMI audio registers.
+ */
+static int hdmi_audio_read(u32 reg, u32 *val)
+{
+ struct hdmi_lpe_audio_ctx *ctx;
+
+ ctx = platform_get_drvdata(hlpe_pdev);
+ *val = ioread32(ctx->mmio_start+reg);
+ dev_dbg(&hlpe_pdev->dev, "%s: reg[0x%x] = 0x%x\n", __func__, reg, *val);
+ return 0;
+}
+
+/**
+ * used to update the masked bits in display controller HDMI
+ * audio registers.
+ */
+static int hdmi_audio_rmw(u32 reg, u32 val, u32 mask)
+{
+ struct hdmi_lpe_audio_ctx *ctx;
+ u32 val_tmp = 0;
+
+ ctx = platform_get_drvdata(hlpe_pdev);
+
+ val_tmp = (val & mask) |
+ ((ioread32(ctx->mmio_start + reg)) & ~mask);
+
+ iowrite32(val_tmp, (ctx->mmio_start+reg));
+ dev_dbg(&hlpe_pdev->dev, "%s: reg[0x%x] = 0x%x\n", __func__,
+ reg, val_tmp);
+
+ return 0;
+}
+
+/**
+ * used to return the HDMI audio capabilities.
+ * e.g. resolution, frame rate.
+ */
+static int hdmi_audio_get_caps(enum had_caps_list get_element,
+ void *capabilities)
+{
+ struct hdmi_lpe_audio_ctx *ctx;
+ int ret = 0;
+
+ ctx = get_hdmi_context();
+
+ dev_dbg(&hlpe_pdev->dev, "%s: Enter\n", __func__);
+
+ switch (get_element) {
+ case HAD_GET_ELD:
+ ret = hdmi_get_eld(capabilities);
+ break;
+ case HAD_GET_DISPLAY_RATE:
+ /* ToDo: Verify if sampling freq logic is correct */
+ *(u32 *)capabilities = ctx->tmds_clock_speed;
+ dev_dbg(&hlpe_pdev->dev, "%s: tmds_clock_speed = 0x%x\n",
+ __func__, ctx->tmds_clock_speed);
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+/**
+ * used to get the current hdmi base address
+ */
+int hdmi_audio_get_register_base(u32 **reg_base,
+ u32 *config_offset)
+{
+ struct hdmi_lpe_audio_ctx *ctx;
+
+ ctx = platform_get_drvdata(hlpe_pdev);
+ *reg_base = (u32 *)(ctx->mmio_start);
+ *config_offset = ctx->had_config_offset;
+ dev_dbg(&hlpe_pdev->dev, "%s: reg_base = 0x%p, cfg_off = 0x%x\n",
+ __func__, *reg_base, *config_offset);
+ return 0;
+}
+
+/**
+ * used to set the HDMI audio capabilities.
+ * e.g. Audio INT.
+ */
+int hdmi_audio_set_caps(enum had_caps_list set_element,
+ void *capabilties)
+{
+ struct hdmi_lpe_audio_ctx *ctx;
+
+ ctx = platform_get_drvdata(hlpe_pdev);
+
+ dev_dbg(&hlpe_pdev->dev, "%s: cap_id = 0x%x\n", __func__, set_element);
+
+ switch (set_element) {
+ case HAD_SET_ENABLE_AUDIO_INT:
+ {
+ u32 status_reg;
+
+ hdmi_audio_read(AUD_HDMI_STATUS_v2 +
+ ctx->had_config_offset, &status_reg);
+ status_reg |=
+ HDMI_AUDIO_BUFFER_DONE | HDMI_AUDIO_UNDERRUN;
+ hdmi_audio_write(AUD_HDMI_STATUS_v2 +
+ ctx->had_config_offset, status_reg);
+ hdmi_audio_read(AUD_HDMI_STATUS_v2 +
+ ctx->had_config_offset, &status_reg);
+
+ }
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static struct hdmi_audio_registers_ops hdmi_audio_reg_ops = {
+ .hdmi_audio_get_register_base = hdmi_audio_get_register_base,
+ .hdmi_audio_read_register = hdmi_audio_read,
+ .hdmi_audio_write_register = hdmi_audio_write,
+ .hdmi_audio_read_modify = hdmi_audio_rmw,
+};
+
+static struct hdmi_audio_query_set_ops hdmi_audio_get_set_ops = {
+ .hdmi_audio_get_caps = hdmi_audio_get_caps,
+ .hdmi_audio_set_caps = hdmi_audio_set_caps,
+};
+
+int mid_hdmi_audio_setup(
+ had_event_call_back audio_callbacks,
+ struct hdmi_audio_registers_ops *reg_ops,
+ struct hdmi_audio_query_set_ops *query_ops)
+{
+ struct hdmi_lpe_audio_ctx *ctx;
+
+ ctx = platform_get_drvdata(hlpe_pdev);
+
+ dev_dbg(&hlpe_pdev->dev, "%s: called\n", __func__);
+
+ reg_ops->hdmi_audio_get_register_base =
+ (hdmi_audio_reg_ops.hdmi_audio_get_register_base);
+ reg_ops->hdmi_audio_read_register =
+ (hdmi_audio_reg_ops.hdmi_audio_read_register);
+ reg_ops->hdmi_audio_write_register =
+ (hdmi_audio_reg_ops.hdmi_audio_write_register);
+ reg_ops->hdmi_audio_read_modify =
+ (hdmi_audio_reg_ops.hdmi_audio_read_modify);
+ query_ops->hdmi_audio_get_caps =
+ hdmi_audio_get_set_ops.hdmi_audio_get_caps;
+ query_ops->hdmi_audio_set_caps =
+ hdmi_audio_get_set_ops.hdmi_audio_set_caps;
+
+ ctx->had_event_callbacks = audio_callbacks;
+
+ return 0;
+}
+
+static void _had_wq(struct work_struct *work)
+{
+ mid_hdmi_audio_signal_event(HAD_EVENT_HOT_PLUG);
+}
+
+int mid_hdmi_audio_register(struct snd_intel_had_interface *driver,
+ void *had_data)
+{
+ struct hdmi_lpe_audio_ctx *ctx;
+
+ ctx = platform_get_drvdata(hlpe_pdev);
+
+ dev_dbg(&hlpe_pdev->dev, "%s: called\n", __func__);
+
+ ctx->had_pvt_data = had_data;
+ ctx->had_interface = driver;
+
+ /* The Audio driver is loading now and we need to notify
+ * it if there is an HDMI device attached
+ */
+ INIT_WORK(&ctx->hdmi_audio_wq, _had_wq);
+ dev_dbg(&hlpe_pdev->dev, "%s: Scheduling HDMI audio work queue\n",
+ __func__);
+ schedule_work(&ctx->hdmi_audio_wq);
+
+ return 0;
+}
+
+static irqreturn_t display_pipe_interrupt_handler(int irq, void *dev_id)
+{
+ u32 audio_stat, audio_reg;
+
+ struct hdmi_lpe_audio_ctx *ctx;
+
+ dev_dbg(&hlpe_pdev->dev, "%s: Enter\n", __func__);
+
+ ctx = platform_get_drvdata(hlpe_pdev);
+
+ audio_reg = ctx->had_config_offset + AUD_HDMI_STATUS_v2;
+ hdmi_audio_read(audio_reg, &audio_stat);
+
+ if (audio_stat & HDMI_AUDIO_UNDERRUN) {
+ hdmi_audio_write(audio_reg, HDMI_AUDIO_UNDERRUN);
+ mid_hdmi_audio_signal_event(
+ HAD_EVENT_AUDIO_BUFFER_UNDERRUN);
+ }
+
+ if (audio_stat & HDMI_AUDIO_BUFFER_DONE) {
+ hdmi_audio_write(audio_reg, HDMI_AUDIO_BUFFER_DONE);
+ mid_hdmi_audio_signal_event(
+ HAD_EVENT_AUDIO_BUFFER_DONE);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static void notify_audio_lpe(void *audio_ptr)
+{
+ struct hdmi_lpe_audio_ctx *ctx = get_hdmi_context();
+ struct intel_hdmi_lpe_audio_pdata *pdata = hlpe_pdev->dev.platform_data;
+ struct intel_hdmi_lpe_audio_eld *eld = audio_ptr;
+
+ if (pdata->hdmi_connected != true) {
+
+ dev_dbg(&hlpe_pdev->dev, "%s: Event: HAD_NOTIFY_HOT_UNPLUG\n",
+ __func__);
+
+ if (hlpe_state == hdmi_connector_status_connected) {
+
+ hlpe_state =
+ hdmi_connector_status_disconnected;
+
+ mid_hdmi_audio_signal_event(
+ HAD_EVENT_HOT_UNPLUG);
+ } else
+ dev_dbg(&hlpe_pdev->dev, "%s: Already Unplugged!\n",
+ __func__);
+
+ } else if (eld != NULL) {
+
+ hdmi_set_eld(eld->eld_data);
+
+ mid_hdmi_audio_signal_event(HAD_EVENT_HOT_PLUG);
+
+ hlpe_state = hdmi_connector_status_connected;
+
+ dev_dbg(&hlpe_pdev->dev, "%s: HAD_NOTIFY_ELD : port = %d, tmds = %d\n",
+ __func__, eld->port_id, pdata->tmds_clock_speed);
+
+ if (pdata->tmds_clock_speed) {
+ ctx->tmds_clock_speed = pdata->tmds_clock_speed;
+ mid_hdmi_audio_signal_event(HAD_EVENT_MODE_CHANGING);
+ }
+ } else
+ dev_dbg(&hlpe_pdev->dev, "%s: Event: NULL EDID!!\n", __func__);
+}
+
+/**
+ * hdmi_lpe_audio_probe - start bridge with i915
+ *
+ * This function is called when the i915 driver creates the hdmi-lpe-audio
+ * platform device. Card creation is deferred until a hot plug event is
+ * received
+ */
+static int hdmi_lpe_audio_probe(struct platform_device *pdev)
+{
+ struct hdmi_lpe_audio_ctx *ctx;
+ struct intel_hdmi_lpe_audio_pdata *pdata;
+ int irq;
+ struct resource *res_mmio;
+ void __iomem *mmio_start;
+ int ret = 0;
+ unsigned long flag_irq;
+ static const struct pci_device_id cherryview_ids[] = {
+ {PCI_DEVICE(0x8086, 0x22b0)},
+ {PCI_DEVICE(0x8086, 0x22b1)},
+ {PCI_DEVICE(0x8086, 0x22b2)},
+ {PCI_DEVICE(0x8086, 0x22b3)},
+ {}
+ };
+
+ dev_dbg(&hlpe_pdev->dev, "Enter %s\n", __func__);
+
+ /*TBD:remove globals*/
+ hlpe_pdev = pdev;
+ hlpe_state = hdmi_connector_status_disconnected;
+
+ /* get resources */
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&hlpe_pdev->dev, "Could not get irq resource\n");
+ return -ENODEV;
+ }
+
+ res_mmio = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res_mmio) {
+ dev_err(&hlpe_pdev->dev, "Could not get IO_MEM resources\n");
+ return -ENXIO;
+ }
+
+ dev_dbg(&hlpe_pdev->dev, "%s: mmio_start = 0x%x, mmio_end = 0x%x\n",
+ __func__, (unsigned int)res_mmio->start,
+ (unsigned int)res_mmio->end);
+
+ mmio_start = ioremap_nocache(res_mmio->start,
+ (size_t)((res_mmio->end - res_mmio->start)
+ + 1));
+ if (!mmio_start) {
+ dev_err(&hlpe_pdev->dev, "Could not get ioremap\n");
+ return -EACCES;
+ }
+
+ /* setup interrupt handler */
+ ret = request_irq(irq, display_pipe_interrupt_handler,
+ 0,
+ pdev->name,
+ NULL);
+ if (ret < 0) {
+ dev_err(&hlpe_pdev->dev, "request_irq failed\n");
+ iounmap(mmio_start);
+ return -ENODEV;
+ }
+
+ /* alloc and save context */
+ ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+ if (ctx == NULL) {
+ free_irq(irq, NULL);
+ iounmap(mmio_start);
+ return -ENOMEM;
+ }
+
+ ctx->irq = irq;
+ dev_dbg(&hlpe_pdev->dev, "hdmi lpe audio: irq num = %d\n", irq);
+ ctx->mmio_start = mmio_start;
+ ctx->tmds_clock_speed = DIS_SAMPLE_RATE_148_5;
+
+ if (pci_dev_present(cherryview_ids)) {
+ dev_dbg(&hlpe_pdev->dev, "%s: Cherrytrail LPE - Detected\n",
+ __func__);
+ ctx->had_config_offset = AUDIO_HDMI_CONFIG_C;
+ } else {
+ dev_dbg(&hlpe_pdev->dev, "%s: Baytrail LPE - Assume\n",
+ __func__);
+ ctx->had_config_offset = AUDIO_HDMI_CONFIG_A;
+ }
+
+ pdata = pdev->dev.platform_data;
+
+ if (pdata == NULL) {
+ dev_err(&hlpe_pdev->dev, "%s: quit: pdata not allocated by i915!!\n", __func__);
+ kfree(ctx);
+ free_irq(irq, NULL);
+ iounmap(mmio_start);
+ return -ENOMEM;
+ }
+
+ platform_set_drvdata(pdev, ctx);
+
+ dev_dbg(&hlpe_pdev->dev, "hdmi lpe audio: setting pin eld notify callback\n");
+
+ spin_lock_irqsave(&pdata->lpe_audio_slock, flag_irq);
+ pdata->notify_audio_lpe = notify_audio_lpe;
+
+ if (pdata->notify_pending) {
+
+ dev_dbg(&hlpe_pdev->dev, "%s: handle pending notification\n", __func__);
+ notify_audio_lpe(&pdata->eld);
+ pdata->notify_pending = false;
+ }
+ spin_unlock_irqrestore(&pdata->lpe_audio_slock, flag_irq);
+
+ return ret;
+}
+
+/**
+ * hdmi_lpe_audio_remove - stop bridge with i915
+ *
+ * This function is called when the platform device is destroyed. The sound
+ * card should have been removed on hot plug event.
+ */
+static int hdmi_lpe_audio_remove(struct platform_device *pdev)
+{
+ struct hdmi_lpe_audio_ctx *ctx;
+
+ dev_dbg(&hlpe_pdev->dev, "Enter %s\n", __func__);
+
+ /* get context, release resources */
+ ctx = platform_get_drvdata(pdev);
+ iounmap(ctx->mmio_start);
+ free_irq(ctx->irq, NULL);
+ kfree(ctx);
+ return 0;
+}
+
+static int hdmi_lpe_audio_suspend(struct platform_device *pt_dev,
+ pm_message_t state)
+{
+ dev_dbg(&hlpe_pdev->dev, "Enter %s\n", __func__);
+ mid_hdmi_audio_suspend(NULL);
+ return 0;
+}
+
+static int hdmi_lpe_audio_resume(struct platform_device *pt_dev)
+{
+ dev_dbg(&hlpe_pdev->dev, "Enter %s\n", __func__);
+ mid_hdmi_audio_resume(NULL);
+ return 0;
+}
+
+static struct platform_driver hdmi_lpe_audio_driver = {
+ .driver = {
+ .name = "hdmi-lpe-audio",
+ },
+ .probe = hdmi_lpe_audio_probe,
+ .remove = hdmi_lpe_audio_remove,
+ .suspend = hdmi_lpe_audio_suspend,
+ .resume = hdmi_lpe_audio_resume
+};
+
+module_platform_driver(hdmi_lpe_audio_driver);
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:hdmi_lpe_audio");
--- /dev/null
+/*
+ * intel_hdmi_lpe_audio.h - Intel HDMI LPE audio driver
+ *
+ * Copyright (C) 2016 Intel Corp
+ * Authors: Sailaja Bandarupalli <sailaja.bandarupalli@intel.com>
+ * Ramesh Babu K V <ramesh.babu@intel.com>
+ * Vaibhav Agarwal <vaibhav.agarwal@intel.com>
+ * Jerome Anand <jerome.anand@intel.com>
+ * Aravind Siddappaji <aravindx.siddappaji@intel.com>
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+#ifndef __INTEL_HDMI_LPE_AUDIO_H
+#define __INTEL_HDMI_LPE_AUDIO_H
+
+#include <linux/types.h>
+#include <sound/initval.h>
+#include <linux/version.h>
+#include <linux/pm_runtime.h>
+#include <sound/asoundef.h>
+#include <sound/control.h>
+#include <sound/pcm.h>
+
+#define HMDI_LPE_AUDIO_DRIVER_NAME "intel-hdmi-lpe-audio"
+#define HAD_MAX_DEVICES 1
+#define HAD_MIN_CHANNEL 2
+#define HAD_MAX_CHANNEL 8
+#define HAD_NUM_OF_RING_BUFS 4
+
+/* Assume 192KHz, 8channel, 25msec period */
+#define HAD_MAX_BUFFER (600*1024)
+#define HAD_MIN_BUFFER (32*1024)
+#define HAD_MAX_PERIODS 4
+#define HAD_MIN_PERIODS 4
+#define HAD_MAX_PERIOD_BYTES (HAD_MAX_BUFFER/HAD_MIN_PERIODS)
+#define HAD_MIN_PERIOD_BYTES 256
+#define HAD_FIFO_SIZE 0 /* fifo not being used */
+#define MAX_SPEAKERS 8
+
+#define AUD_SAMPLE_RATE_32 32000
+#define AUD_SAMPLE_RATE_44_1 44100
+#define AUD_SAMPLE_RATE_48 48000
+#define AUD_SAMPLE_RATE_88_2 88200
+#define AUD_SAMPLE_RATE_96 96000
+#define AUD_SAMPLE_RATE_176_4 176400
+#define AUD_SAMPLE_RATE_192 192000
+
+#define HAD_MIN_RATE AUD_SAMPLE_RATE_32
+#define HAD_MAX_RATE AUD_SAMPLE_RATE_192
+
+#define DIS_SAMPLE_RATE_25_2 25200
+#define DIS_SAMPLE_RATE_27 27000
+#define DIS_SAMPLE_RATE_54 54000
+#define DIS_SAMPLE_RATE_74_25 74250
+#define DIS_SAMPLE_RATE_148_5 148500
+#define HAD_REG_WIDTH 0x08
+#define HAD_MAX_HW_BUFS 0x04
+#define HAD_MAX_DIP_WORDS 16
+#define INTEL_HAD "IntelHdmiLpeAudio"
+
+/* _AUD_CONFIG register MASK */
+#define AUD_CONFIG_MASK_UNDERRUN 0xC0000000
+#define AUD_CONFIG_MASK_SRDBG 0x00000002
+#define AUD_CONFIG_MASK_FUNCRST 0x00000001
+
+#define MAX_CNT 0xFF
+#define HAD_SUSPEND_DELAY 1000
+
+#define OTM_HDMI_ELD_SIZE 128
+
+union otm_hdmi_eld_t {
+ unsigned char eld_data[OTM_HDMI_ELD_SIZE];
+ struct {
+ /* Byte[0] = ELD Version Number */
+ union {
+ unsigned char byte0;
+ struct {
+ unsigned char reserved:3; /* Reserf */
+ unsigned char eld_ver:5; /* ELD Version Number */
+ /* 00000b - reserved
+ * 00001b - first rev, obsoleted
+ * 00010b - version 2, supporting CEA version
+ * 861D or below
+ * 00011b:11111b - reserved
+ * for future
+ */
+ };
+ };
+
+ /* Byte[1] = Vendor Version Field */
+ union {
+ unsigned char vendor_version;
+ struct {
+ unsigned char reserved1:3;
+ unsigned char veld_ver:5; /* Version number of the ELD
+ * extension. This value is
+ * provisioned and unique to
+ * each vendor.
+ */
+ };
+ };
+
+ /* Byte[2] = Baseline Length field */
+ unsigned char baseline_eld_length; /* Length of the Baseline structure
+ * divided by Four.
+ */
+
+ /* Byte [3] = Reserved for future use */
+ unsigned char byte3;
+
+ /* Starting of the BaseLine EELD structure
+ * Byte[4] = Monitor Name Length
+ */
+ union {
+ unsigned char byte4;
+ struct {
+ unsigned char mnl:5;
+ unsigned char cea_edid_rev_id:3;
+ };
+ };
+
+ /* Byte[5] = Capabilities */
+ union {
+ unsigned char capabilities;
+ struct {
+ unsigned char hdcp:1; /* HDCP support */
+ unsigned char ai_support:1; /* AI support */
+ unsigned char connection_type:2; /* Connection type
+ * 00 - HDMI
+ * 01 - DP
+ * 10 -11 Reserved
+ * for future
+ * connection types
+ */
+ unsigned char sadc:4; /* Indicates number of 3 bytes
+ * Short Audio Descriptors.
+ */
+ };
+ };
+
+ /* Byte[6] = Audio Synch Delay */
+ unsigned char audio_synch_delay; /* Amount of time reported by the
+ * sink that the video trails audio
+ * in milliseconds.
+ */
+
+ /* Byte[7] = Speaker Allocation Block */
+ union {
+ unsigned char speaker_allocation_block;
+ struct {
+ unsigned char flr:1; /*Front Left and Right channels*/
+ unsigned char lfe:1; /*Low Frequency Effect channel*/
+ unsigned char fc:1; /*Center transmission channel*/
+ unsigned char rlr:1; /*Rear Left and Right channels*/
+ unsigned char rc:1; /*Rear Center channel*/
+ unsigned char flrc:1; /*Front left and Right of Center
+ *transmission channels
+ */
+ unsigned char rlrc:1; /*Rear left and Right of Center
+ *transmission channels
+ */
+ unsigned char reserved3:1; /* Reserved */
+ };
+ };
+
+ /* Byte[8 - 15] - 8 Byte port identification value */
+ unsigned char port_id_value[8];
+
+ /* Byte[16 - 17] - 2 Byte Manufacturer ID */
+ unsigned char manufacturer_id[2];
+
+ /* Byte[18 - 19] - 2 Byte Product ID */
+ unsigned char product_id[2];
+
+ /* Byte [20-83] - 64 Bytes of BaseLine Data */
+ unsigned char mn_sand_sads[64]; /* This will include
+ * - ASCII string of Monitor name
+ * - List of 3 byte SADs
+ * - Zero padding
+ */
+
+ /* Vendor ELD Block should continue here!
+ * No Vendor ELD block defined as of now.
+ */
+ } __packed;
+};
+
+/**
+ * enum had_status - Audio stream states
+ *
+ * @STREAM_INIT: Stream initialized
+ * @STREAM_RUNNING: Stream running
+ * @STREAM_PAUSED: Stream paused
+ * @STREAM_DROPPED: Stream dropped
+ */
+enum had_stream_status {
+ STREAM_INIT = 0,
+ STREAM_RUNNING = 1,
+ STREAM_PAUSED = 2,
+ STREAM_DROPPED = 3
+};
+
+/**
+ * enum had_status_stream - HAD stream states
+ */
+enum had_status_stream {
+ HAD_INIT = 0,
+ HAD_RUNNING_STREAM,
+};
+
+enum had_drv_status {
+ HAD_DRV_CONNECTED,
+ HAD_DRV_RUNNING,
+ HAD_DRV_DISCONNECTED,
+ HAD_DRV_SUSPENDED,
+ HAD_DRV_ERR,
+};
+
+/* enum intel_had_aud_buf_type - HDMI controller ring buffer types */
+enum intel_had_aud_buf_type {
+ HAD_BUF_TYPE_A = 0,
+ HAD_BUF_TYPE_B = 1,
+ HAD_BUF_TYPE_C = 2,
+ HAD_BUF_TYPE_D = 3,
+};
+
+enum num_aud_ch {
+ CH_STEREO = 0,
+ CH_THREE_FOUR = 1,
+ CH_FIVE_SIX = 2,
+ CH_SEVEN_EIGHT = 3
+};
+
+/* HDMI Controller register offsets - audio domain common */
+/* Base address for below regs = 0x65000 */
+enum hdmi_ctrl_reg_offset_common {
+ AUDIO_HDMI_CONFIG_A = 0x000,
+ AUDIO_HDMI_CONFIG_B = 0x800,
+ AUDIO_HDMI_CONFIG_C = 0x900,
+};
+/* HDMI controller register offsets */
+enum hdmi_ctrl_reg_offset_v1 {
+ AUD_CONFIG = 0x0,
+ AUD_CH_STATUS_0 = 0x08,
+ AUD_CH_STATUS_1 = 0x0C,
+ AUD_HDMI_CTS = 0x10,
+ AUD_N_ENABLE = 0x14,
+ AUD_SAMPLE_RATE = 0x18,
+ AUD_BUF_CONFIG = 0x20,
+ AUD_BUF_CH_SWAP = 0x24,
+ AUD_BUF_A_ADDR = 0x40,
+ AUD_BUF_A_LENGTH = 0x44,
+ AUD_BUF_B_ADDR = 0x48,
+ AUD_BUF_B_LENGTH = 0x4c,
+ AUD_BUF_C_ADDR = 0x50,
+ AUD_BUF_C_LENGTH = 0x54,
+ AUD_BUF_D_ADDR = 0x58,
+ AUD_BUF_D_LENGTH = 0x5c,
+ AUD_CNTL_ST = 0x60,
+ AUD_HDMI_STATUS = 0x68,
+ AUD_HDMIW_INFOFR = 0x114,
+};
+
+/*
+ * Delta changes in HDMI controller register offsets
+ * compare to v1 version
+ */
+
+enum hdmi_ctrl_reg_offset_v2 {
+ AUD_HDMI_STATUS_v2 = 0x64,
+ AUD_HDMIW_INFOFR_v2 = 0x68,
+};
+
+/*
+ * CEA speaker placement:
+ *
+ * FL FLC FC FRC FR
+ *
+ * LFE
+ *
+ * RL RLC RC RRC RR
+ *
+ * The Left/Right Surround channel _notions_ LS/RS in SMPTE 320M
+ * corresponds to CEA RL/RR; The SMPTE channel _assignment_ C/LFE is
+ * swapped to CEA LFE/FC.
+ */
+enum cea_speaker_placement {
+ FL = (1 << 0), /* Front Left */
+ FC = (1 << 1), /* Front Center */
+ FR = (1 << 2), /* Front Right */
+ FLC = (1 << 3), /* Front Left Center */
+ FRC = (1 << 4), /* Front Right Center */
+ RL = (1 << 5), /* Rear Left */
+ RC = (1 << 6), /* Rear Center */
+ RR = (1 << 7), /* Rear Right */
+ RLC = (1 << 8), /* Rear Left Center */
+ RRC = (1 << 9), /* Rear Right Center */
+ LFE = (1 << 10), /* Low Frequency Effect */
+};
+
+struct cea_channel_speaker_allocation {
+ int ca_index;
+ int speakers[8];
+
+ /* derived values, just for convenience */
+ int channels;
+ int spk_mask;
+};
+
+struct channel_map_table {
+ unsigned char map; /* ALSA API channel map position */
+ unsigned char cea_slot; /* CEA slot value */
+ int spk_mask; /* speaker position bit mask */
+};
+
+/**
+ * union aud_cfg - Audio configuration
+ *
+ * @cfg_regx: individual register bits
+ * @cfg_regval: full register value
+ *
+ */
+union aud_cfg {
+ struct {
+ u32 aud_en:1;
+ u32 layout:1;
+ u32 fmt:2;
+ u32 num_ch:2;
+ u32 rsvd0:1;
+ u32 set:1;
+ u32 flat:1;
+ u32 val_bit:1;
+ u32 user_bit:1;
+ u32 underrun:1;
+ u32 rsvd1:20;
+ } cfg_regx;
+ struct {
+ u32 aud_en:1;
+ u32 layout:1;
+ u32 fmt:2;
+ u32 num_ch:3;
+ u32 set:1;
+ u32 flat:1;
+ u32 val_bit:1;
+ u32 user_bit:1;
+ u32 underrun:1;
+ u32 packet_mode:1;
+ u32 left_align:1;
+ u32 bogus_sample:1;
+ u32 dp_modei:1;
+ u32 rsvd:16;
+ } cfg_regx_v2;
+ u32 cfg_regval;
+};
+
+/**
+ * union aud_ch_status_0 - Audio Channel Status 0 Attributes
+ *
+ * @status_0_regx:individual register bits
+ * @status_0_regval:full register value
+ *
+ */
+union aud_ch_status_0 {
+ struct {
+ u32 ch_status:1;
+ u32 lpcm_id:1;
+ u32 cp_info:1;
+ u32 format:3;
+ u32 mode:2;
+ u32 ctg_code:8;
+ u32 src_num:4;
+ u32 ch_num:4;
+ u32 samp_freq:4;
+ u32 clk_acc:2;
+ u32 rsvd:2;
+ } status_0_regx;
+ u32 status_0_regval;
+};
+
+/**
+ * union aud_ch_status_1 - Audio Channel Status 1 Attributes
+ *
+ * @status_1_regx: individual register bits
+ * @status_1_regval: full register value
+ *
+ */
+union aud_ch_status_1 {
+ struct {
+ u32 max_wrd_len:1;
+ u32 wrd_len:3;
+ u32 rsvd:28;
+ } status_1_regx;
+ u32 status_1_regval;
+};
+
+/**
+ * union aud_hdmi_cts - CTS register
+ *
+ * @cts_regx: individual register bits
+ * @cts_regval: full register value
+ *
+ */
+union aud_hdmi_cts {
+ struct {
+ u32 cts_val:20;
+ u32 en_cts_prog:1;
+ u32 rsvd:11;
+ } cts_regx;
+ struct {
+ u32 cts_val:24;
+ u32 en_cts_prog:1;
+ u32 rsvd:7;
+ } cts_regx_v2;
+ u32 cts_regval;
+};
+
+/**
+ * union aud_hdmi_n_enable - N register
+ *
+ * @n_regx: individual register bits
+ * @n_regval: full register value
+ *
+ */
+union aud_hdmi_n_enable {
+ struct {
+ u32 n_val:20;
+ u32 en_n_prog:1;
+ u32 rsvd:11;
+ } n_regx;
+ struct {
+ u32 n_val:24;
+ u32 en_n_prog:1;
+ u32 rsvd:7;
+ } n_regx_v2;
+ u32 n_regval;
+};
+
+/**
+ * union aud_buf_config - Audio Buffer configurations
+ *
+ * @buf_cfg_regx: individual register bits
+ * @buf_cfgval: full register value
+ *
+ */
+union aud_buf_config {
+ struct {
+ u32 fifo_width:8;
+ u32 rsvd0:8;
+ u32 aud_delay:8;
+ u32 rsvd1:8;
+ } buf_cfg_regx;
+ struct {
+ u32 audio_fifo_watermark:8;
+ u32 dma_fifo_watermark:3;
+ u32 rsvd0:5;
+ u32 aud_delay:8;
+ u32 rsvd1:8;
+ } buf_cfg_regx_v2;
+ u32 buf_cfgval;
+};
+
+/**
+ * union aud_buf_ch_swap - Audio Sample Swapping offset
+ *
+ * @buf_ch_swap_regx: individual register bits
+ * @buf_ch_swap_val: full register value
+ *
+ */
+union aud_buf_ch_swap {
+ struct {
+ u32 first_0:3;
+ u32 second_0:3;
+ u32 first_1:3;
+ u32 second_1:3;
+ u32 first_2:3;
+ u32 second_2:3;
+ u32 first_3:3;
+ u32 second_3:3;
+ u32 rsvd:8;
+ } buf_ch_swap_regx;
+ u32 buf_ch_swap_val;
+};
+
+/**
+ * union aud_buf_addr - Address for Audio Buffer
+ *
+ * @buf_addr_regx: individual register bits
+ * @buf_addr_val: full register value
+ *
+ */
+union aud_buf_addr {
+ struct {
+ u32 valid:1;
+ u32 intr_en:1;
+ u32 rsvd:4;
+ u32 addr:26;
+ } buf_addr_regx;
+ u32 buf_addr_val;
+};
+
+/**
+ * union aud_buf_len - Length of Audio Buffer
+ *
+ * @buf_len_regx: individual register bits
+ * @buf_len_val: full register value
+ *
+ */
+union aud_buf_len {
+ struct {
+ u32 buf_len:20;
+ u32 rsvd:12;
+ } buf_len_regx;
+ u32 buf_len_val;
+};
+
+/**
+ * union aud_ctrl_st - Audio Control State Register offset
+ *
+ * @ctrl_regx: individual register bits
+ * @ctrl_val: full register value
+ *
+ */
+union aud_ctrl_st {
+ struct {
+ u32 ram_addr:4;
+ u32 eld_ack:1;
+ u32 eld_addr:4;
+ u32 eld_buf_size:5;
+ u32 eld_valid:1;
+ u32 cp_ready:1;
+ u32 dip_freq:2;
+ u32 dip_idx:3;
+ u32 dip_en_sta:4;
+ u32 rsvd:7;
+ } ctrl_regx;
+ u32 ctrl_val;
+};
+
+/**
+ * union aud_info_frame1 - Audio HDMI Widget Data Island Packet offset
+ *
+ * @fr1_regx: individual register bits
+ * @fr1_val: full register value
+ *
+ */
+union aud_info_frame1 {
+ struct {
+ u32 pkt_type:8;
+ u32 ver_num:8;
+ u32 len:5;
+ u32 rsvd:11;
+ } fr1_regx;
+ u32 fr1_val;
+};
+
+/**
+ * union aud_info_frame2 - DIP frame 2
+ *
+ * @fr2_regx: individual register bits
+ * @fr2_val: full register value
+ *
+ */
+union aud_info_frame2 {
+ struct {
+ u32 chksum:8;
+ u32 chnl_cnt:3;
+ u32 rsvd0:1;
+ u32 coding_type:4;
+ u32 smpl_size:2;
+ u32 smpl_freq:3;
+ u32 rsvd1:3;
+ u32 format:8;
+ } fr2_regx;
+ u32 fr2_val;
+};
+
+/**
+ * union aud_info_frame3 - DIP frame 3
+ *
+ * @fr3_regx: individual register bits
+ * @fr3_val: full register value
+ *
+ */
+union aud_info_frame3 {
+ struct {
+ u32 chnl_alloc:8;
+ u32 rsvd0:3;
+ u32 lsv:4;
+ u32 dm_inh:1;
+ u32 rsvd1:16;
+ } fr3_regx;
+ u32 fr3_val;
+};
+
+enum hdmi_connector_status {
+ hdmi_connector_status_connected = 1,
+ hdmi_connector_status_disconnected = 2,
+ hdmi_connector_status_unknown = 3,
+};
+
+#define HDMI_AUDIO_UNDERRUN (1UL<<31)
+#define HDMI_AUDIO_BUFFER_DONE (1UL<<29)
+
+
+#define PORT_ENABLE (1 << 31)
+#define SDVO_AUDIO_ENABLE (1 << 6)
+
+enum had_caps_list {
+ HAD_GET_ELD = 1,
+ HAD_GET_DISPLAY_RATE,
+ HAD_SET_ENABLE_AUDIO,
+ HAD_SET_DISABLE_AUDIO,
+ HAD_SET_ENABLE_AUDIO_INT,
+ HAD_SET_DISABLE_AUDIO_INT,
+};
+
+enum had_event_type {
+ HAD_EVENT_HOT_PLUG = 1,
+ HAD_EVENT_HOT_UNPLUG,
+ HAD_EVENT_MODE_CHANGING,
+ HAD_EVENT_AUDIO_BUFFER_DONE,
+ HAD_EVENT_AUDIO_BUFFER_UNDERRUN,
+ HAD_EVENT_QUERY_IS_AUDIO_BUSY,
+ HAD_EVENT_QUERY_IS_AUDIO_SUSPENDED,
+};
+
+/*
+ * HDMI Display Controller Audio Interface
+ *
+ */
+typedef int (*had_event_call_back) (enum had_event_type event_type,
+ void *ctxt_info);
+
+struct hdmi_audio_registers_ops {
+ int (*hdmi_audio_get_register_base)(u32 **reg_base,
+ u32 *config_offset);
+ int (*hdmi_audio_read_register)(u32 reg_addr, u32 *data);
+ int (*hdmi_audio_write_register)(u32 reg_addr, u32 data);
+ int (*hdmi_audio_read_modify)(u32 reg_addr, u32 data,
+ u32 mask);
+};
+
+struct hdmi_audio_query_set_ops {
+ int (*hdmi_audio_get_caps)(enum had_caps_list query_element,
+ void *capabilties);
+ int (*hdmi_audio_set_caps)(enum had_caps_list set_element,
+ void *capabilties);
+};
+
+struct hdmi_audio_event {
+ int type;
+};
+
+struct snd_intel_had_interface {
+ const char *name;
+ int (*query)(void *had_data, struct hdmi_audio_event event);
+ int (*suspend)(void *had_data, struct hdmi_audio_event event);
+ int (*resume)(void *had_data);
+};
+
+bool mid_hdmi_audio_is_busy(void *dev);
+bool mid_hdmi_audio_suspend(void *dev);
+void mid_hdmi_audio_resume(void *dev);
+void mid_hdmi_audio_signal_event(enum had_event_type event);
+int mid_hdmi_audio_setup(
+ had_event_call_back audio_callbacks,
+ struct hdmi_audio_registers_ops *reg_ops,
+ struct hdmi_audio_query_set_ops *query_ops);
+int mid_hdmi_audio_register(
+ struct snd_intel_had_interface *driver,
+ void *had_data);
+
+#endif
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff