[PATCH v2, 01/14] media: mtk-vcodec: Get numbers of register bases from DT

Yunfei Dong
2021-07-17T08:13:31Z

Different platform may has different numbers of register bases. Gets the
numbers of register bases from DT (sizeof(u32) * 4 bytes for each).

Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com>
---
v2: no changes
---
.../platform/mtk-vcodec/mtk_vcodec_dec_drv.c | 38 ++++++++++++++-----
1 file changed, 29 insertions(+), 9 deletions(-)

diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c
index 55ae198dbcf9..d3f34cd04759 100644
--- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c
+++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c
@@ -78,6 +78,31 @@ static irqreturn_t mtk_vcodec_dec_irq_handler(int irq, void *priv)
return IRQ_HANDLED;
}

+static int mtk_vcodec_get_reg_bases(struct mtk_vcodec_dev *dev)
+{
+ struct platform_device *pdev = dev->plat_dev;
+ int reg_num, i, ret = 0;
+
+ /* Sizeof(u32) * 4 bytes for each register base. */
+ reg_num = of_property_count_elems_of_size(pdev->dev.of_node, "reg",
+ sizeof(u32) * 4);
+ if (!reg_num || reg_num > NUM_MAX_VDEC_REG_BASE) {
+ dev_err(&pdev->dev, "Invalid register property size: %d\n", reg_num);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < reg_num; i++) {
+ dev->reg_base[i] = devm_platform_ioremap_resource(pdev, i);
+ if (IS_ERR((__force void *)dev->reg_base[i])) {
+ ret = PTR_ERR((__force void *)dev->reg_base[i]);
+ break;
+ }
+ mtk_v4l2_debug(2, "reg[%d] base=%p", i, dev->reg_base[i]);
+ }
+
+ return ret;
+}
+
static int fops_vcodec_open(struct file *file)
{
struct mtk_vcodec_dev *dev = video_drvdata(file);
@@ -206,7 +231,7 @@ static int mtk_vcodec_probe(struct platform_device *pdev)
struct resource *res;
phandle rproc_phandle;
enum mtk_vcodec_fw_type fw_type;
- int i, ret;
+ int ret;

dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
if (!dev)
@@ -238,14 +263,9 @@ static int mtk_vcodec_probe(struct platform_device *pdev)
goto err_dec_pm;
}

- for (i = 0; i < NUM_MAX_VDEC_REG_BASE; i++) {
- dev->reg_base[i] = devm_platform_ioremap_resource(pdev, i);
- if (IS_ERR((__force void *)dev->reg_base[i])) {
- ret = PTR_ERR((__force void *)dev->reg_base[i]);
- goto err_res;
- }
- mtk_v4l2_debug(2, "reg[%d] base=%p", i, dev->reg_base[i]);
- }
+ ret = mtk_vcodec_get_reg_bases(dev);
+ if (ret)
+ goto err_res;

res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (res == NULL) {