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staging: most: dim2: force fcnt=3 on Renesas GEN3

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Per Renesas datasheet, MLBC0 register's fcnt field in the embedded
dim2 module must be never set to value different from 3.

Enforce that, via an optional field in struct dim2_platform_data.

Signed-off-by: Nikita Yushchenko <nikita.yoush@cogentembedded.com>
Link: https://lore.kernel.org/r/20210927155804.27877-1-nikita.yoush@cogentembedded.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Nikita Yushchenko
2021-09-27 18:58:05 +03:00
committed by Greg Kroah-Hartman
parent c090666ba9
commit 9b27a62d11
1 changed files with 23 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/staging/most/dim2/dim2.c
+23 -6
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@@ -108,6 +108,7 @@ struct dim2_hdm {
struct dim2_platform_data {
int (*enable)(struct platform_device *pdev);
void (*disable)(struct platform_device *pdev);
u8 fcnt;
};
#define iface_to_hdm(iface) container_of(iface, struct dim2_hdm, most_iface)
@@ -731,7 +732,7 @@ static int dim2_probe(struct platform_device *pdev)
struct dim2_hdm *dev;
struct resource *res;
int ret, i;
u8 hal_ret;
u8 dev_fcnt, hal_ret;
int irq;
enum { MLB_INT_IDX, AHB0_INT_IDX };
@@ -770,8 +771,14 @@ static int dim2_probe(struct platform_device *pdev)
dev->disable_platform = pdata ? pdata->disable : NULL;
dev_info(&pdev->dev, "sync: num of frames per sub-buffer: %u\n", fcnt);
hal_ret = dim_startup(dev->io_base, dev->clk_speed, fcnt);
if (pdata && pdata->fcnt)
dev_fcnt = pdata->fcnt;
else
dev_fcnt = fcnt;
dev_info(&pdev->dev, "sync: num of frames per sub-buffer: %u\n",
dev_fcnt);
hal_ret = dim_startup(dev->io_base, dev->clk_speed, dev_fcnt);
if (hal_ret != DIM_NO_ERROR) {
dev_err(&pdev->dev, "dim_startup failed: %d\n", hal_ret);
ret = -ENODEV;
@@ -1047,9 +1054,19 @@ static void rcar_m3_disable(struct platform_device *pdev)
enum dim2_platforms { FSL_MX6, RCAR_H2, RCAR_M3 };
static struct dim2_platform_data plat_data[] = {
[FSL_MX6] = { .enable = fsl_mx6_enable, .disable = fsl_mx6_disable },
[RCAR_H2] = { .enable = rcar_h2_enable, .disable = rcar_h2_disable },
[RCAR_M3] = { .enable = rcar_m3_enable, .disable = rcar_m3_disable },
[FSL_MX6] = {
.enable = fsl_mx6_enable,
.disable = fsl_mx6_disable,
},
[RCAR_H2] = {
.enable = rcar_h2_enable,
.disable = rcar_h2_disable,
},
[RCAR_M3] = {
.enable = rcar_m3_enable,
.disable = rcar_m3_disable,
.fcnt = 3,
},
};
static const struct of_device_id dim2_of_match[] = {