leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

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

Browse Source 
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
[vkoul: change patch subsystem tag]
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Srinivasa Rao Mandadapu 2022-05-18 18:12:35 +05:30 committed by Vinod Koul
parent 3e9c9f9057
commit 33ba017888
1 changed files with 10 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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);