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asoc: qcs405: Add support for ep92 HDMI bridge chip

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Add support for ep92 HDMI bridge chip for QCS405 platform

Change-Id: Ifa8a6e60cee69c88276b50d5f61b3e13fac82b60
Signed-off-by: Ralf Herz <rherz@codeaurora.org>
This commit is contained in:
Ralf Herz 2018-06-25 10:30:10 +02:00
commit 6d96dd41d3
1 changed files with 119 additions and 0 deletions
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119
asoc/qcs405.c
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@ -16,6 +16,7 @@
#include <linux/of_gpio.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/input.h>
@ -7527,6 +7528,119 @@ static void msm_i2s_auxpcm_deinit(void)
}
}
static int msm_scan_i2c_addr(struct platform_device *pdev,
uint32_t busnum, uint32_t addr)
{
struct i2c_adapter *adap;
u8 rbuf;
struct i2c_msg msg;
int status = 0;
adap = i2c_get_adapter(busnum);
if (!adap) {
dev_err(&pdev->dev, "%s: Cannot get I2C adapter %d\n",
__func__, busnum);
return -EBUSY;
}
/* to test presence, read one byte from device */
msg.addr = addr;
msg.flags = I2C_M_RD;
msg.len = 1;
msg.buf = &rbuf;
status = i2c_transfer(adap, &msg, 1);
i2c_put_adapter(adap);
if (status != 1) {
dev_dbg(&pdev->dev, "%s: I2C read from addr 0x%02x failed\n",
__func__, addr);
return -ENODEV;
}
dev_dbg(&pdev->dev, "%s: I2C read from addr 0x%02x successful\n",
__func__, addr);
return 0;
}
static int msm_detect_ep92_dev(struct platform_device *pdev,
struct snd_soc_card *card)
{
int i;
uint32_t ep92_busnum = 0;
uint32_t ep92_reg = 0;
const char *ep92_name = NULL;
struct snd_soc_dai_link *dai;
int rc = 0;
rc = of_property_read_u32(pdev->dev.of_node, "qcom,ep92-busnum",
&ep92_busnum);
if (rc) {
dev_info(&pdev->dev, "%s: No DT match ep92-reg\n", __func__);
return 0;
}
rc = of_property_read_u32(pdev->dev.of_node, "qcom,ep92-reg",
&ep92_reg);
if (rc) {
dev_info(&pdev->dev, "%s: No DT match ep92-busnum\n", __func__);
return 0;
}
rc = of_property_read_string(pdev->dev.of_node, "qcom,ep92-name",
&ep92_name);
if (rc) {
dev_info(&pdev->dev, "%s: No DT match ep92-name\n", __func__);
return 0;
}
/* check I2C bus for connected ep92 chip */
if (msm_scan_i2c_addr(pdev, ep92_busnum, ep92_reg) < 0) {
/* check a second time after a short delay */
msleep(20);
if (msm_scan_i2c_addr(pdev, ep92_busnum, ep92_reg) < 0) {
dev_info(&pdev->dev, "%s: No ep92 device found\n",
__func__);
/* continue with snd_card registration without ep92 */
return 0;
}
}
dev_info(&pdev->dev, "%s: ep92 device found\n", __func__);
/* update codec info in MI2S dai link */
dai = &msm_mi2s_be_dai_links[0];
for (i=0; i<ARRAY_SIZE(msm_mi2s_be_dai_links); i++) {
if (strcmp(dai->name, LPASS_BE_SEC_MI2S_TX) == 0) {
dev_dbg(&pdev->dev,
"%s: Set Sec MI2S dai to ep92 codec\n",
__func__);
dai->codec_name = ep92_name;
dai->codec_dai_name = "ep92-hdmi";
break;
}
dai++;
}
/* update codec info in SPDIF dai link */
dai = &msm_spdif_be_dai_links[0];
for (i=0; i<ARRAY_SIZE(msm_spdif_be_dai_links); i++) {
if (strcmp(dai->name, LPASS_BE_SEC_SPDIF_TX) == 0) {
dev_dbg(&pdev->dev,
"%s: Set Sec SPDIF dai to ep92 codec\n",
__func__);
dai->codec_name = ep92_name;
dai->codec_dai_name = "ep92-arc";
break;
}
dai++;
}
return 0;
}
static int msm_asoc_machine_probe(struct platform_device *pdev)
{
struct snd_soc_card *card;
@ -7544,6 +7658,11 @@ static int msm_asoc_machine_probe(struct platform_device *pdev)
if (!pdata)
return -ENOMEM;
/* test for ep92 HDMI bridge and update dai links accordingly */
ret = msm_detect_ep92_dev(pdev, card);
if (ret)
goto err;
card = populate_snd_card_dailinks(&pdev->dev);
if (!card) {
dev_err(&pdev->dev, "%s: Card uninitialized\n", __func__);