From: "Mukunda,Vijendar" <vijendar.mukunda@amd.com>
To: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
broonie@kernel.org, alsa-devel@alsa-project.org
Cc: Sunil-kumar.Dommati@amd.com, Liam Girdwood <lgirdwood@gmail.com>,
open list <linux-kernel@vger.kernel.org>,
Takashi Iwai <tiwai@suse.com>,
Alexander.Deucher@amd.com
Subject: Re: [PATCH 03/12] add acp5x init/de-init functions
Date: Thu, 8 Jul 2021 19:00:09 +0530 [thread overview]
Message-ID: <654d311a-b625-f7f9-76f6-326653f324a9@amd.com> (raw)
In-Reply-To: <dca2f367-59a3-6ea6-7abc-c9817442eb86@linux.intel.com>
On 7/7/21 9:45 PM, Pierre-Louis Bossart wrote:
> Missing 'ASoC: amd' prefix in commit subject?
Will add prefix.
>
>
>> +static int acp5x_power_on(void __iomem *acp5x_base)
>> +{
>> + u32 val;
>> + int timeout;
>> +
>> + val = acp_readl(acp5x_base + ACP_PGFSM_STATUS);
>> +
>> + if (val == 0)
>> + return val;
>> +
>> + if ((val & ACP_PGFSM_STATUS_MASK) !=
>> + ACP_POWER_ON_IN_PROGRESS)
>> + acp_writel(ACP_PGFSM_CNTL_POWER_ON_MASK,
>> + acp5x_base + ACP_PGFSM_CONTROL);
>> + timeout = 0;
>> + while (++timeout < 500) {
>> + val = acp_readl(acp5x_base + ACP_PGFSM_STATUS);
>> + if (!val)
>
> Shouldn't you use something like
> if ((val & ACP_PGFSM_STATUS_MASK) == ACP_POWERED_ON)
> for symmetry with the power-off case?
Yes we can do that. will fix it.
>
>> + return 0;
>> + udelay(1);
>> + }
>> + return -ETIMEDOUT;
>> +}
>> +
>> +static int acp5x_power_off(void __iomem *acp5x_base)
>> +{
>> + u32 val;
>> + int timeout;
>> +
>> + acp_writel(ACP_PGFSM_CNTL_POWER_OFF_MASK,
>> + acp5x_base + ACP_PGFSM_CONTROL);
>> + timeout = 0;
>> + while (++timeout < 500) {
>> + val = acp_readl(acp5x_base + ACP_PGFSM_STATUS);
>> + if ((val & ACP_PGFSM_STATUS_MASK) == ACP_POWERED_OFF)
>> + return 0;
>> + udelay(1);
>> + }
>> + return -ETIMEDOUT;
>> +}
>> +
>> +static int acp5x_reset(void __iomem *acp5x_base)
>> +{
>> + u32 val;
>> + int timeout;
>> +
>> + acp_writel(1, acp5x_base + ACP_SOFT_RESET);
>> + timeout = 0;
>> + while (++timeout < 500) {
>> + val = acp_readl(acp5x_base + ACP_SOFT_RESET);
>> + if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK)
>> + break;
>> + cpu_relax();
>> + }
>> + acp_writel(0, acp5x_base + ACP_SOFT_RESET);
>> + timeout = 0;
>> + while (++timeout < 500) {
>> + val = acp_readl(acp5x_base + ACP_SOFT_RESET);
>> + if (!val)
>> + return 0;
>> + cpu_relax();
>> + }
>> + return -ETIMEDOUT;
>> +}
>> +
>> +static void acp5x_enable_interrupts(void __iomem *acp5x_base)
>> +{
>> + acp_writel(0x01, acp5x_base + ACP_EXTERNAL_INTR_ENB);
>> +}
>> +
>> +static void acp5x_disable_interrupts(void __iomem *acp5x_base)
>> +{
>> + acp_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp5x_base +
>> + ACP_EXTERNAL_INTR_STAT);
>> + acp_writel(0x00, acp5x_base + ACP_EXTERNAL_INTR_CNTL);
>> + acp_writel(0x00, acp5x_base + ACP_EXTERNAL_INTR_ENB);
>> +}
>> +
>> +static int acp5x_init(void __iomem *acp5x_base)
>> +{
>> + int ret;
>> +
>> + /* power on */
>> + ret = acp5x_power_on(acp5x_base);
>> + if (ret) {
>> + pr_err("ACP5x power on failed\n");
>> + return ret;
>> + }
>> + /* Reset */
>> + ret = acp5x_reset(acp5x_base);
>> + if (ret) {
>> + pr_err("ACP5x reset failed\n");
>> + return ret;
>> + }
>> + acp5x_enable_interrupts(acp5x_base);
>> + return 0;
>> +}
>> +
>> +static int acp5x_deinit(void __iomem *acp5x_base)
>> +{
>> + int ret;
>> +
>> + acp5x_disable_interrupts(acp5x_base);
>> + /* Reset */
>> + ret = acp5x_reset(acp5x_base);
>> + if (ret) {
>> + pr_err("ACP5x reset failed\n");
>> + return ret;
>> + }
>> + /* power off */
>> + if (acp_power_gating) {
>> + ret = acp5x_power_off(acp5x_base);
>> + if (ret) {
>> + pr_err("ACP5x power off failed\n");
>> + return ret;
>> + }
>> + }
>> + return 0;
>
> shouldn't you have a sequence for shutdown that ignores the acp_power_gating parameter?
>
BIOS will apply ACP Power gating(which is part of ACP power off
sequence) when ACP enters D3 state. i.e BIOS will control ACP Power gating.
acp5x_power_off() API is no longer required.This was implemented to
verify ACP Power gating during initial driver bring up.
We will drop acp5x_power_off() API, will remove acp_power_gating
parameter and post the new version.
next prev parent reply other threads:[~2021-07-08 13:12 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20210707055623.27371-1-vijendar.mukunda@amd.com>
2021-07-07 5:56 ` [PATCH 01/12] ASoC: amd: add Vangogh ACP5x IP register header Vijendar Mukunda
2021-07-07 5:56 ` [PATCH 02/12] ASoC: amd: add Vangogh ACP PCI driver Vijendar Mukunda
2021-07-07 16:17 ` Mark Brown
2021-07-08 14:07 ` Mukunda,Vijendar
2021-07-07 5:56 ` [PATCH 03/12] add acp5x init/de-init functions Vijendar Mukunda
2021-07-07 16:15 ` Pierre-Louis Bossart
2021-07-08 13:30 ` Mukunda,Vijendar [this message]
2021-07-07 5:56 ` [PATCH 04/12] ASoC: amd: create acp5x platform devices Vijendar Mukunda
2021-07-07 16:22 ` Mark Brown
2021-07-08 15:02 ` Mukunda,Vijendar
2021-07-07 5:56 ` [PATCH 05/12] ASoC: amd: add ACP5x PCM platform driver Vijendar Mukunda
2021-07-07 16:17 ` Pierre-Louis Bossart
2021-07-08 13:31 ` Mukunda,Vijendar
2021-07-07 16:24 ` Mark Brown
2021-07-08 11:57 ` Mukunda,Vijendar
2021-07-07 5:56 ` [PATCH 06/12] ASoC: amd: irq handler changes for ACP5x PCM dma driver Vijendar Mukunda
2021-07-07 16:20 ` Pierre-Louis Bossart
2021-07-08 13:32 ` Mukunda,Vijendar
2021-07-07 5:56 ` [PATCH 07/12] ASoC: amd: add ACP5x pcm dma driver ops Vijendar Mukunda
2021-07-07 16:27 ` Pierre-Louis Bossart
2021-07-08 11:56 ` Mukunda,Vijendar
2021-07-07 16:30 ` Mark Brown
2021-07-08 11:43 ` Mukunda,Vijendar
2021-07-07 5:56 ` [PATCH 08/12] ASoC: amd: add vangogh i2s controller driver Vijendar Mukunda
2021-07-07 5:56 ` [PATCH 09/12] ASoC: amd: add vangogh i2s dai driver ops Vijendar Mukunda
2021-07-07 16:35 ` Mark Brown
2021-07-08 11:30 ` Mukunda,Vijendar
2021-07-07 5:56 ` [PATCH 10/12] ASoC: amd: add vangogh pci driver pm ops Vijendar Mukunda
2021-07-07 16:34 ` Pierre-Louis Bossart
2021-07-08 11:41 ` Mukunda,Vijendar
2021-07-13 6:36 ` Mukunda,Vijendar
2021-07-14 16:23 ` Mark Brown
2021-07-15 23:49 ` Mukunda,Vijendar
2021-07-07 5:56 ` [PATCH 11/12] ASoc: amd: add vangogh i2s dma " Vijendar Mukunda
2021-07-07 5:56 ` [PATCH 12/12] ASoC: amd: enable vangogh acp5x driver build Vijendar Mukunda
2021-07-07 9:00 ` kernel test robot
2021-07-08 14:08 ` Mukunda,Vijendar
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