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soundwire: amd: refactor soundwire pads enable

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As sdw pads enable sequence is executed only once, invoke it from probe
sequence.

Program required pads for both manager instances based on link_mask during
probe sequence. This will avoid acquiring mutex lock.
Remove unnecessary delay after programming ACP_SW_PAD_KEEPER_EN register.

Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Acked-by: Vinod Koul <vkoul@kernel.org>
Link: https://msgid.link/r/20240129055147.1493853-6-Vijendar.Mukunda@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Vijendar Mukunda 2024-01-29 11:21:39 +05:30 committed by Mark Brown
parent aff9d088a3
commit cf0ddbc29d
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GPG Key ID: 24D68B725D5487D0
2 changed files with 45 additions and 18 deletions
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45
drivers/soundwire/amd_init.c
View File

@ -15,6 +15,47 @@
#include "amd_init.h"
#define ACP_PAD_PULLDOWN_CTRL 0x0001448
#define ACP_SW_PAD_KEEPER_EN 0x0001454
#define AMD_SDW_PAD_PULLDOWN_CTRL_ENABLE_MASK 0x7f9a
#define AMD_SDW0_PAD_PULLDOWN_CTRL_ENABLE_MASK 0x7f9f
#define AMD_SDW1_PAD_PULLDOWN_CTRL_ENABLE_MASK 0x7ffa
#define AMD_SDW0_PAD_EN_MASK 1
#define AMD_SDW1_PAD_EN_MASK 0x10
#define AMD_SDW_PAD_EN_MASK (AMD_SDW0_PAD_EN_MASK | AMD_SDW1_PAD_EN_MASK)
static int amd_enable_sdw_pads(void __iomem *mmio, u32 link_mask, struct device *dev)
{
u32 val;
u32 pad_keeper_en_mask, pad_pulldown_ctrl_mask;
switch (link_mask) {
case 1:
pad_keeper_en_mask = AMD_SDW0_PAD_EN_MASK;
pad_pulldown_ctrl_mask = AMD_SDW0_PAD_PULLDOWN_CTRL_ENABLE_MASK;
break;
case 2:
pad_keeper_en_mask = AMD_SDW1_PAD_EN_MASK;
pad_pulldown_ctrl_mask = AMD_SDW1_PAD_PULLDOWN_CTRL_ENABLE_MASK;
break;
case 3:
pad_keeper_en_mask = AMD_SDW_PAD_EN_MASK;
pad_pulldown_ctrl_mask = AMD_SDW_PAD_PULLDOWN_CTRL_ENABLE_MASK;
break;
default:
dev_err(dev, "No SDW Links are enabled\n");
return -ENODEV;
}
val = readl(mmio + ACP_SW_PAD_KEEPER_EN);
val |= pad_keeper_en_mask;
writel(val, mmio + ACP_SW_PAD_KEEPER_EN);
val = readl(mmio + ACP_PAD_PULLDOWN_CTRL);
val &= pad_pulldown_ctrl_mask;
writel(val, mmio + ACP_PAD_PULLDOWN_CTRL);
return 0;
}
static int sdw_amd_cleanup(struct sdw_amd_ctx *ctx)
{
int i;
@ -37,6 +78,7 @@ static struct sdw_amd_ctx *sdw_amd_probe_controller(struct sdw_amd_res *res)
struct platform_device_info pdevinfo[2];
u32 link_mask;
int count, index;
int ret;
if (!res)
return NULL;
@ -50,6 +92,9 @@ static struct sdw_amd_ctx *sdw_amd_probe_controller(struct sdw_amd_res *res)
count = res->count;
dev_dbg(&adev->dev, "Creating %d SDW Link devices\n", count);
ret = amd_enable_sdw_pads(res->mmio_base, res->link_mask, res->parent);
if (ret)
return NULL;
/*
* we need to alloc/free memory manually and can't use devm:

18
drivers/soundwire/amd_manager.c
View File

@ -26,23 +26,6 @@
#define to_amd_sdw(b) container_of(b, struct amd_sdw_manager, bus)
static void amd_enable_sdw_pads(struct amd_sdw_manager *amd_manager)
{
u32 sw_pad_pulldown_val;
u32 val;
mutex_lock(amd_manager->acp_sdw_lock);
val = readl(amd_manager->acp_mmio + ACP_SW_PAD_KEEPER_EN);
val |= amd_manager->reg_mask->sw_pad_enable_mask;
writel(val, amd_manager->acp_mmio + ACP_SW_PAD_KEEPER_EN);
usleep_range(1000, 1500);
sw_pad_pulldown_val = readl(amd_manager->acp_mmio + ACP_PAD_PULLDOWN_CTRL);
sw_pad_pulldown_val &= amd_manager->reg_mask->sw_pad_pulldown_mask;
writel(sw_pad_pulldown_val, amd_manager->acp_mmio + ACP_PAD_PULLDOWN_CTRL);
mutex_unlock(amd_manager->acp_sdw_lock);
}
static int amd_init_sdw_manager(struct amd_sdw_manager *amd_manager)
{
u32 val;
@ -872,7 +855,6 @@ int amd_sdw_manager_start(struct amd_sdw_manager *amd_manager)
prop = &amd_manager->bus.prop;
if (!prop->hw_disabled) {
amd_enable_sdw_pads(amd_manager);
ret = amd_init_sdw_manager(amd_manager);
if (ret)
return ret;