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authorSrinivasa Rao Mandadapu <quic_srivasam@quicinc.com>2022-05-18 15:42:35 +0300
committerVinod Koul <vkoul@kernel.org>2022-07-06 10:06:42 +0300
commit33ba01788889666d90abb89a9c057c6ff8135178 (patch)
treec556f291ac9f1d30a63a42b9ea0e94a826bc2331 /drivers/soundwire
parent3e9c9f90573f4633ec8270d0d02bcea4fad1e802 (diff)
downloadlinux-33ba01788889666d90abb89a9c057c6ff8135178.tar.xz
soundwire: qcom: 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 [vkoul: change patch subsystem tag] Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/soundwire')
-rw-r--r--drivers/soundwire/qcom.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
index 22b706350ead..a3fccf051e07 100644
--- a/drivers/soundwire/qcom.c
+++ b/drivers/soundwire/qcom.c
@@ -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);