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ASoC: qcom: soundwire: Add support for controlling audio CGCR from HLOS 

Add support for controlling soundwire audio CGCR interface using clock
framework to make hclk ungating with software. As per new hardware
changes, software has to always ungate hclk if soundwire is operational
and keep it running. This requirement is for latest LPASS chipsets for
RX, TX and WSA path to work.

Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@quicinc.com>
Link: https://lore.kernel.org/r/1652877755-25120-1-git-send-email-quic_srivasam@quicinc.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Srinivasa Rao Mandadapu 2022-05-18 18:12:35 +05:30 committed by Mark Brown
parent fef94875a7
commit 3288288107
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 10 additions and 0 deletions
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10
drivers/soundwire/qcom.c
View File

@ -13,6 +13,7 @@
#include <linux/of_device.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <linux/slab.h>
#include <linux/pm_wakeirq.h>
#include <linux/slimbus.h>
@ -142,6 +143,7 @@ struct qcom_swrm_ctrl {
struct device *dev;
struct regmap *regmap;
void __iomem *mmio;
struct reset_control *audio_cgcr;
#ifdef CONFIG_DEBUG_FS
struct dentry *debugfs;
#endif
@ -656,6 +658,8 @@ static int qcom_swrm_init(struct qcom_swrm_ctrl *ctrl)
val = FIELD_PREP(SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_BMSK, ctrl->rows_index);
val |= FIELD_PREP(SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_BMSK, ctrl->cols_index);
reset_control_reset(ctrl->audio_cgcr);
ctrl->reg_write(ctrl, SWRM_MCP_FRAME_CTRL_BANK_ADDR(0), val);
/* Enable Auto enumeration */
@ -1332,6 +1336,10 @@ static int qcom_swrm_probe(struct platform_device *pdev)
ctrl->bus.compute_params = &qcom_swrm_compute_params;
ctrl->bus.clk_stop_timeout = 300;
ctrl->audio_cgcr = devm_reset_control_get_exclusive(dev, "swr_audio_cgcr");
if (IS_ERR(ctrl->audio_cgcr))
dev_err(dev, "Failed to get audio_cgcr reset required for soundwire-v1.6.0\n");
ret = qcom_swrm_get_port_config(ctrl);
if (ret)
goto err_clk;
@ -1485,6 +1493,8 @@ static int __maybe_unused swrm_runtime_resume(struct device *dev)
qcom_swrm_get_device_status(ctrl);
sdw_handle_slave_status(&ctrl->bus, ctrl->status);
} else {
reset_control_reset(ctrl->audio_cgcr);
ctrl->reg_write(ctrl, SWRM_MCP_BUS_CTRL, SWRM_MCP_BUS_CLK_START);
ctrl->reg_write(ctrl, SWRM_INTERRUPT_CLEAR,
SWRM_INTERRUPT_STATUS_MASTER_CLASH_DET);