Message ID | 20211129034201.5767-2-yunfei.dong@mediatek.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
Series | Support multi hardware decode using of_platform_populate | expand |
Le 29/11/2021 à 04:41, Yunfei Dong a écrit : > Different platform may has different numbers of register bases. Gets the > numbers of register bases from DT (sizeof(u32) * 4 bytes for each). > > Reviewed-by: Tzung-Bi Shih<tzungbi@google.com> > Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com> > --- > .../platform/mtk-vcodec/mtk_vcodec_dec_drv.c | 37 ++++++++++++++----- > 1 file changed, 28 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 e6e6a8203eeb..59caf2163349 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 +78,30 @@ 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; > + > + /* Sizeof(u32) * 4 bytes for each register base. */ > + reg_num = of_property_count_elems_of_size(pdev->dev.of_node, "reg", > + sizeof(u32) * 4); It looks strange for me to have a "reg" size equal to sizeof(u32) * 4. Usually we more see reg size = sizeof(u32). > + if (reg_num <= 0 || reg_num > NUM_MAX_VDEC_REG_BASE) { If reg_num = NUM_MAX_VDEC_REG_BASE you will iterate out of bounds of dev->reg_base array. That never happens because dev->reg_base size equal NUM_MAX_VCODEC_REG_BASE. The question is what is the real needed size for dev->reg_base array ? NUM_MAX_VDEC_REG_BASE or NUM_MAX_VCODEC_REG_BASE ? Regards, Benjamin > + 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(dev->reg_base[i])) > + return PTR_ERR(dev->reg_base[i]); > + > + mtk_v4l2_debug(2, "reg[%d] base=%p", i, dev->reg_base[i]); > + } > + > + return 0; > +} > + > static int fops_vcodec_open(struct file *file) > { > struct mtk_vcodec_dev *dev = video_drvdata(file); > @@ -206,7 +230,7 @@ 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 +262,9 @@ 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) {
Hi Benjamin, Thanks for your suggestion. On Tue, 2021-11-30 at 14:20 +0100, Benjamin Gaignard wrote: > Le 29/11/2021 à 04:41, Yunfei Dong a écrit : > > Different platform may has different numbers of register bases. > > Gets the > > numbers of register bases from DT (sizeof(u32) * 4 bytes for each). > > > > Reviewed-by: Tzung-Bi Shih<tzungbi@google.com> > > Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com> > > --- > > .../platform/mtk-vcodec/mtk_vcodec_dec_drv.c | 37 > > ++++++++++++++----- > > 1 file changed, 28 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 e6e6a8203eeb..59caf2163349 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 +78,30 @@ 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; > > + > > + /* Sizeof(u32) * 4 bytes for each register base. */ > > + reg_num = of_property_count_elems_of_size(pdev->dev.of_node, > > "reg", > > + sizeof(u32) * 4); > > It looks strange for me to have a "reg" size equal to sizeof(u32) * > 4. Usually > we more see reg size = sizeof(u32). > For the definition of reg in dtsi is reg = <0 0x16000000 0 0x800>, Need to using sizeof(u32) * 4, not sizeof(u32). > > + if (reg_num <= 0 || reg_num > NUM_MAX_VDEC_REG_BASE) { > > If reg_num = NUM_MAX_VDEC_REG_BASE you will iterate out of bounds of > dev->reg_base array. > That never happens because dev->reg_base size equal > NUM_MAX_VCODEC_REG_BASE. > The question is what is the real needed size for dev->reg_base array > ? NUM_MAX_VDEC_REG_BASE or > NUM_MAX_VCODEC_REG_BASE ? > > NUM_MAX_VDEC_REG_BASE is used for video decoder, and > NUM_MAX_VCODEC_REG_BASE is used for encoder. The max register number of video decoder is NUM_MAX_VDEC_REG_BASE, and the ranges is 0 ~ NUM_MAX_VDEC_REG_BASE - 1. > Regards, > Benjamin > Best Regards, Yunfei Dong > > + 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(dev->reg_base[i])) > > + return PTR_ERR(dev->reg_base[i]); > > + > > + mtk_v4l2_debug(2, "reg[%d] base=%p", i, dev- > > >reg_base[i]); > > + } > > + > > + return 0; > > +} > > + > > static int fops_vcodec_open(struct file *file) > > { > > struct mtk_vcodec_dev *dev = video_drvdata(file); > > @@ -206,7 +230,7 @@ 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 +262,9 @@ 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) {
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 e6e6a8203eeb..59caf2163349 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 +78,30 @@ 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; + + /* 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 <= 0 || 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(dev->reg_base[i])) + return PTR_ERR(dev->reg_base[i]); + + mtk_v4l2_debug(2, "reg[%d] base=%p", i, dev->reg_base[i]); + } + + return 0; +} + static int fops_vcodec_open(struct file *file) { struct mtk_vcodec_dev *dev = video_drvdata(file); @@ -206,7 +230,7 @@ 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 +262,9 @@ 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) {