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Message-ID: <f55c444b-d1c7-9d61-1f0c-c6bfe32ca2db@linux.intel.com>
Date: Fri, 12 Aug 2022 16:20:01 +0200
From: Amadeusz Sławiński
<amadeuszx.slawinski@...ux.intel.com>
To: Syed Saba kareem <Syed.SabaKareem@....com>, broonie@...nel.org,
alsa-devel@...a-project.org
Cc: Sunil-kumar.Dommati@....com,
open list <linux-kernel@...r.kernel.org>,
Basavaraj.Hiregoudar@....com, Takashi Iwai <tiwai@...e.com>,
Liam Girdwood <lgirdwood@...il.com>, mario.limonciello@....com,
Vijendar.Mukunda@....com
Subject: Re: [PATCH 04/13] ASoC: amd: add platform devices for acp6.2 pdm
driver and dmic driver
On 8/12/2022 2:07 PM, Syed Saba kareem wrote:
> ACP6.2 IP has PDM decoder block.
> Create a platform device for it, so that the PDM platform driver
> can be bound to this device.
> Pass PCI resources like MMIO to this platform device.
>
> Create a platform device for generic dmic codec driver.
>
> Signed-off-by: Syed Saba Kareem <Syed.SabaKareem@....com>
> Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
> ---
> sound/soc/amd/ps/acp62.h | 23 +++++++++++
> sound/soc/amd/ps/pci-ps.c | 83 ++++++++++++++++++++++++++++++++++++++-
> 2 files changed, 104 insertions(+), 2 deletions(-)
>
> diff --git a/sound/soc/amd/ps/acp62.h b/sound/soc/amd/ps/acp62.h
> index 8e734f190b11..ab56e1f8c31b 100644
> --- a/sound/soc/amd/ps/acp62.h
> +++ b/sound/soc/amd/ps/acp62.h
> @@ -9,6 +9,10 @@
>
> #define ACP_DEVICE_ID 0x15E2
> #define ACP62_PHY_BASE_ADDRESS 0x1240000
> +#define ACP6x_REG_START 0x1240000
> +#define ACP6x_REG_END 0x1250200
> +#define ACP6x_DEVS 2
> +#define ACP6x_PDM_MODE 1
>
> #define ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK 0x00010001
> #define ACP_PGFSM_CNTL_POWER_ON_MASK 1
> @@ -22,6 +26,25 @@
> #define ACP_ERROR_MASK 0x20000000
> #define ACP_EXT_INTR_STAT_CLEAR_MASK 0xFFFFFFFF
>
> +enum acp_config {
> + ACP_CONFIG_0 = 0,
> + ACP_CONFIG_1,
> + ACP_CONFIG_2,
> + ACP_CONFIG_3,
> + ACP_CONFIG_4,
> + ACP_CONFIG_5,
> + ACP_CONFIG_6,
> + ACP_CONFIG_7,
> + ACP_CONFIG_8,
> + ACP_CONFIG_9,
> + ACP_CONFIG_10,
> + ACP_CONFIG_11,
> + ACP_CONFIG_12,
> + ACP_CONFIG_13,
> + ACP_CONFIG_14,
> + ACP_CONFIG_15,
> +};
> +
> static inline u32 acp62_readl(void __iomem *base_addr)
> {
> return readl(base_addr - ACP62_PHY_BASE_ADDRESS);
> diff --git a/sound/soc/amd/ps/pci-ps.c b/sound/soc/amd/ps/pci-ps.c
> index 2014f415af15..94201f75427a 100644
> --- a/sound/soc/amd/ps/pci-ps.c
> +++ b/sound/soc/amd/ps/pci-ps.c
> @@ -9,11 +9,16 @@
> #include <linux/module.h>
> #include <linux/io.h>
> #include <linux/delay.h>
> +#include <linux/platform_device.h>
> +#include <linux/acpi.h>
>
> #include "acp62.h"
>
> struct acp62_dev_data {
> void __iomem *acp62_base;
> + struct resource *res;
> + bool acp62_audio_mode;
> + struct platform_device *pdev[ACP6x_DEVS];
> };
>
> static int acp62_power_on(void __iomem *acp_base)
> @@ -117,8 +122,11 @@ static int snd_acp62_probe(struct pci_dev *pci,
> const struct pci_device_id *pci_id)
> {
> struct acp62_dev_data *adata;
> + struct platform_device_info pdevinfo[ACP6x_DEVS];
> + int index, ret;
> + int val = 0x00;
> + struct acpi_device *adev;
> u32 addr;
> - int ret;
>
> /* Pink Sardine device check */
> switch (pci->revision) {
> @@ -157,8 +165,75 @@ static int snd_acp62_probe(struct pci_dev *pci,
> ret = acp62_init(adata->acp62_base);
> if (ret)
> goto release_regions;
> + val = acp62_readl(adata->acp62_base + ACP_PIN_CONFIG);
> + switch (val) {
> + case ACP_CONFIG_0:
> + case ACP_CONFIG_1:
> + case ACP_CONFIG_2:
> + case ACP_CONFIG_3:
> + case ACP_CONFIG_9:
> + case ACP_CONFIG_15:
> + dev_info(&pci->dev, "Audio Mode %d\n", val);
> + break;
> + default:
> +
> + /* Checking DMIC hardware*/
> + adev = acpi_find_child_device(ACPI_COMPANION(&pci->dev), 0x02, 0);
> +
You can probably remove one level of indentation in following code if
you do:
if (!adev)
break;
> + if (adev) {
> + const union acpi_object *obj;
> +
> + if (!acpi_dev_get_property(adev, "acp-audio-device-type",
> + ACPI_TYPE_INTEGER, &obj) &&
> + obj->integer.value == 2) {
> + adata->res = devm_kzalloc(&pci->dev,
> + sizeof(struct resource), GFP_KERNEL);
> +
> + if (!adata->res) {
> + ret = -ENOMEM;
> + goto de_init;
> + }
> +
> + adata->res->name = "acp_iomem";
> + adata->res->flags = IORESOURCE_MEM;
> + adata->res->start = addr;
> + adata->res->end = addr + (ACP6x_REG_END - ACP6x_REG_START);
> + adata->acp62_audio_mode = ACP6x_PDM_MODE;
>
> + memset(&pdevinfo, 0, sizeof(pdevinfo));
> + pdevinfo[0].name = "acp_ps_pdm_dma";
> + pdevinfo[0].id = 0;
> + pdevinfo[0].parent = &pci->dev;
> + pdevinfo[0].num_res = 1;
> + pdevinfo[0].res = adata->res;
> +
> + pdevinfo[1].name = "dmic-codec";
> + pdevinfo[1].id = 0;
> + pdevinfo[1].parent = &pci->dev;
> +
> + for (index = 0; index < ACP6x_DEVS; index++) {
> + adata->pdev[index] =
> + platform_device_register_full(&pdevinfo[index]);
> +
> + if (IS_ERR(adata->pdev[index])) {
> + dev_err(&pci->dev,
> + "cannot register %s device\n",
> + pdevinfo[index].name);
> + ret = PTR_ERR(adata->pdev[index]);
> + goto unregister_devs;
> + }
> + }
> + }
> + }
> + break;
> + }
> return 0;
> +unregister_devs:
> + for (--index; index >= 0; index--)
> + platform_device_unregister(adata->pdev[index]);
> +de_init:
> + if (acp62_deinit(adata->acp62_base))
> + dev_err(&pci->dev, "ACP de-init failed\n");
> release_regions:
> pci_release_regions(pci);
> disable_pci:
> @@ -170,9 +245,13 @@ static int snd_acp62_probe(struct pci_dev *pci,
> static void snd_acp62_remove(struct pci_dev *pci)
> {
> struct acp62_dev_data *adata;
> - int ret;
> + int ret, index;
>
> adata = pci_get_drvdata(pci);
> + if (adata->acp62_audio_mode == ACP6x_PDM_MODE) {
> + for (index = 0; index < ACP6x_DEVS; index++)
> + platform_device_unregister(adata->pdev[index]);
> + }
> ret = acp62_deinit(adata->acp62_base);
> if (ret)
> dev_err(&pci->dev, "ACP de-init failed\n");
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