Re: [PATCH 2/2] soundwire: qcom: get max rows and cols info from compatible

From: Srinivas Kandagatla
Date: Thu Sep 10 2020 - 04:09:47 EST



On 10/09/2020 07:39, Vinod Koul wrote:
On 09-09-20, 17:09, Srinivas Kandagatla wrote:
currently the max rows and cols values are hardcoded. In reality
these values depend on the IP version. So get these based on
device tree compatible strings.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
---
drivers/soundwire/qcom.c | 46 +++++++++++++++++++++++++++-------------
1 file changed, 31 insertions(+), 15 deletions(-)

diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
index 1ec0ee931f5b..03c5bc05fc6e 100644
--- a/drivers/soundwire/qcom.c
+++ b/drivers/soundwire/qcom.c
@@ -69,11 +69,6 @@
#define SWRM_REG_VAL_PACK(data, dev, id, reg) \
((reg) | ((id) << 16) | ((dev) << 20) | ((data) << 24))
-#define SWRM_MAX_ROW_VAL 0 /* Rows = 48 */
-#define SWRM_DEFAULT_ROWS 48
-#define SWRM_MIN_COL_VAL 0 /* Cols = 2 */
-#define SWRM_DEFAULT_COL 16
-#define SWRM_MAX_COL_VAL 7
#define SWRM_SPECIAL_CMD_ID 0xF
#define MAX_FREQ_NUM 1
#define TIMEOUT_MS (2 * HZ)
@@ -107,6 +102,8 @@ struct qcom_swrm_ctrl {
unsigned int version;
int num_din_ports;
int num_dout_ports;
+ int cols_index;
+ int rows_index;
unsigned long dout_port_mask;
unsigned long din_port_mask;
struct qcom_swrm_port_config pconfig[QCOM_SDW_MAX_PORTS];
@@ -116,6 +113,21 @@ struct qcom_swrm_ctrl {
int (*reg_write)(struct qcom_swrm_ctrl *ctrl, int reg, int val);
};
+struct qcom_swrm_data {
+ int default_cols;
+ int default_rows;

unsigned int for these?
Yes, we could do that but does it really add anything, given the range is up to 256.


+};
+
+static struct qcom_swrm_data swrm_v1_3_data = {
+ .default_rows = 48,
+ .default_cols = 16,
+};
+
+static struct qcom_swrm_data swrm_v1_5_data = {
+ .default_rows = 50,
+ .default_cols = 16,
+};
+
#define to_qcom_sdw(b) container_of(b, struct qcom_swrm_ctrl, bus)
static int qcom_swrm_ahb_reg_read(struct qcom_swrm_ctrl *ctrl, int reg,
@@ -302,8 +314,8 @@ static int qcom_swrm_init(struct qcom_swrm_ctrl *ctrl)
u32 val;
/* Clear Rows and Cols */
- val = (SWRM_MAX_ROW_VAL << SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_SHFT |
- SWRM_MIN_COL_VAL << SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_SHFT);
+ val = ctrl->rows_index << SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_SHFT |
+ ctrl->cols_index << SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_SHFT;

use FIELD_{GET|SET} / u32_encode_bits for these

Please rebase on sdw-next, this has already been updated in next

Yes, I will do that!

ctrl->reg_write(ctrl, SWRM_MCP_FRAME_CTRL_BANK_ADDR(0), val);
@@ -382,8 +394,8 @@ static int qcom_swrm_pre_bank_switch(struct sdw_bus *bus)
val &= ~SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_BMSK;
val &= ~SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_BMSK;
- val |= (SWRM_MAX_ROW_VAL << SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_SHFT |
- SWRM_MAX_COL_VAL << SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_SHFT);
+ val |= ctrl->rows_index << SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_SHFT |
+ ctrl->cols_index << SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_SHFT;
return ctrl->reg_write(ctrl, reg, val);
}
@@ -784,6 +796,7 @@ static int qcom_swrm_probe(struct platform_device *pdev)
struct sdw_master_prop *prop;
struct sdw_bus_params *params;
struct qcom_swrm_ctrl *ctrl;
+ const struct qcom_swrm_data *data;
struct resource *res;
int ret;
u32 val;
@@ -792,6 +805,9 @@ static int qcom_swrm_probe(struct platform_device *pdev)
if (!ctrl)
return -ENOMEM;
+ data = of_device_get_match_data(dev);

how about checking data is valid?
I think the check would be unnecessary here, as we would not endup here without a matching compatible!

--srini

+ ctrl->rows_index = sdw_find_row_index(data->default_rows);
+ ctrl->cols_index = sdw_find_col_index(data->default_cols);
#ifdef CONFIG_SLIMBUS
if (dev->parent->bus == &slimbus_bus) {
#else
@@ -844,8 +860,8 @@ static int qcom_swrm_probe(struct platform_device *pdev)
params = &ctrl->bus.params;
params->max_dr_freq = DEFAULT_CLK_FREQ;
params->curr_dr_freq = DEFAULT_CLK_FREQ;
- params->col = SWRM_DEFAULT_COL;
- params->row = SWRM_DEFAULT_ROWS;
+ params->col = data->default_cols;
+ params->row = data->default_rows;
ctrl->reg_read(ctrl, SWRM_MCP_STATUS, &val);
params->curr_bank = val & SWRM_MCP_STATUS_BANK_NUM_MASK;
params->next_bank = !params->curr_bank;
@@ -855,8 +871,8 @@ static int qcom_swrm_probe(struct platform_device *pdev)
prop->num_clk_gears = 0;
prop->num_clk_freq = MAX_FREQ_NUM;
prop->clk_freq = &qcom_swrm_freq_tbl[0];
- prop->default_col = SWRM_DEFAULT_COL;
- prop->default_row = SWRM_DEFAULT_ROWS;
+ prop->default_col = data->default_cols;
+ prop->default_row = data->default_rows;
ctrl->reg_read(ctrl, SWRM_COMP_HW_VERSION, &ctrl->version);
@@ -907,8 +923,8 @@ static int qcom_swrm_remove(struct platform_device *pdev)
}
static const struct of_device_id qcom_swrm_of_match[] = {
- { .compatible = "qcom,soundwire-v1.3.0", },
- { .compatible = "qcom,soundwire-v1.5.1", },
+ { .compatible = "qcom,soundwire-v1.3.0", .data = &swrm_v1_3_data },
+ { .compatible = "qcom,soundwire-v1.5.1", .data = &swrm_v1_5_data },
{/* sentinel */},
};
--
2.21.0