| Message ID | 20230620000349.2122191-6-nfraprado@collabora.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Enable decoder for mt8183 | expand |
Il 20/06/23 02:03, Nícolas F. R. A. Prado ha scritto: > Remove the requirement of a VDEC_SYS reg iospace for MT8183. To achieve > that, rely on a vdecsys syscon to be passed through the DT, and use it > to directly read the VDEC_HW_ACTIVE bit during IRQ handling to check > whether the HW is active. > > The old behavior is still present when reg-names aren't supplied, as > MT8173 still relies on it. > > Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com> > > --- > I dropped the tags from this commit since a syscon is now used instead > of an extra clock. > > Changes in v3: > - Switched handling of VDEC_HW_ACTIVE to use a syscon instead of the > 'active' clock > - Reworded commit > - Removed changes to subdev part of driver, since they aren't used by > MT8183 > > .../mediatek/vcodec/mtk_vcodec_dec_drv.c | 71 ++++++++++++++++--- > .../platform/mediatek/vcodec/mtk_vcodec_drv.h | 1 + > 2 files changed, 61 insertions(+), 11 deletions(-) > > diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c > index 83780d29a9cf..387ed26d6d5d 100644 > --- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c > +++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c > @@ -8,10 +8,12 @@ > #include <linux/slab.h> > #include <linux/interrupt.h> > #include <linux/irq.h> > +#include <linux/mfd/syscon.h> > #include <linux/module.h> > #include <linux/of_device.h> > #include <linux/of.h> > #include <linux/pm_runtime.h> > +#include <linux/regmap.h> > #include <media/v4l2-event.h> > #include <media/v4l2-mem2mem.h> > #include <media/videobuf2-dma-contig.h> > @@ -38,22 +40,37 @@ static int mtk_vcodec_get_hw_count(struct mtk_vcodec_dev *dev) > } > } > > +static bool mtk_vcodec_is_hw_active(struct mtk_vcodec_dev *dev) > +{ > + u32 cg_status = 0; > + int val, ret; > + > + if (!dev->reg_base[VDEC_SYS]) { > + ret = regmap_read(dev->vdecsys_regmap, VDEC_HW_ACTIVE_ADDR, &val); > + if (ret) { > + mtk_v4l2_err("Failed to read VDEC active status"); > + return false; > + } > + > + return (val & VDEC_HW_ACTIVE_MASK) == 0; > + } > + > + cg_status = readl(dev->reg_base[VDEC_SYS] + VDEC_HW_ACTIVE_ADDR); > + return (cg_status & VDEC_HW_ACTIVE_MASK) == 0; You can either do... { if (dev->vdecsys_regmap) { ret = regmap_read(......., &cg_status); if (ret) { mtk_v4l2_err(...) return false; } } else { cg_status = readl(....) } return !FIELD_GET(VDEC_HW_ACTIVE_MASK, cg_status); } .... or .... { if (dev->vdecsys_regmap) return !regmap_test_bits(dev->vdecsys_regmap, VDEC_HW_ACTIVE_ADDR, VDEC_HW_ACTIVE_MASK); cg_status = readl(....); return !FIELD_GET(VDEC_HW_ACTIVE_MASK, cg_status); } That's way cleaner :-) > +} > + > static irqreturn_t mtk_vcodec_dec_irq_handler(int irq, void *priv) > { > struct mtk_vcodec_dev *dev = priv; > struct mtk_vcodec_ctx *ctx; > - u32 cg_status = 0; > unsigned int dec_done_status = 0; > void __iomem *vdec_misc_addr = dev->reg_base[VDEC_MISC] + > VDEC_IRQ_CFG_REG; > > ctx = mtk_vcodec_get_curr_ctx(dev, MTK_VDEC_CORE); > > - /* check if HW active or not */ > - cg_status = readl(dev->reg_base[0] + VDEC_HW_ACTIVE_ADDR); > - if ((cg_status & VDEC_HW_ACTIVE_MASK) != 0) { > - mtk_v4l2_err("DEC ISR, VDEC active is not 0x0 (0x%08x)", > - cg_status); > + if (!mtk_vcodec_is_hw_active(dev)) { > + mtk_v4l2_err("DEC ISR, VDEC active is not 0x0"); > return IRQ_HANDLED; > } > > @@ -82,6 +99,25 @@ static int mtk_vcodec_get_reg_bases(struct mtk_vcodec_dev *dev) > { > struct platform_device *pdev = dev->plat_dev; > int reg_num, i; > + struct resource *res; > + bool no_vdecsys_reg = false; bool has_vdecsys_reg; > + static const char * const mtk_dec_reg_names[] = { > + "misc", > + "ld", > + "top", > + "cm", > + "ad", > + "av", > + "pp", > + "hwd", > + "hwq", > + "hwb", > + "hwg" > + }; > + > + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "misc"); /* * If we have reg-names in devicetree, this means that we're on a new * register organization, which implies that the VDEC_SYS iospace gets * R/W through a syscon (regmap). * Here we try to get the "misc" iostart only to check if we have reg-names */ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "misc"); if (res) has_vdecsys_reg = false; else has_vdecsys_reg = true; > + if (res) > + no_vdecsys_reg = true; > > /* Sizeof(u32) * 4 bytes for each register base. */ > reg_num = of_property_count_elems_of_size(pdev->dev.of_node, "reg", > @@ -91,12 +127,22 @@ static int mtk_vcodec_get_reg_bases(struct mtk_vcodec_dev *dev) > 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]); > + if (!no_vdecsys_reg) { ...so here you invert the branch if (has_vdecsys_reg) { .... byname ioremap .... parse syscon regmap here, not later! } else { .... by id ioremap .... } > + 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]); > + } > + } else { > + for (i = 0; i < reg_num; i++) { > + dev->reg_base[i+1] = devm_platform_ioremap_resource_byname(pdev, mtk_dec_reg_names[i]); > + if (IS_ERR(dev->reg_base[i+1])) > + return PTR_ERR(dev->reg_base[i+1]); > > - mtk_v4l2_debug(2, "reg[%d] base=%p", i, dev->reg_base[i]); > + mtk_v4l2_debug(2, "reg[%d] base=%p", i+1, dev->reg_base[i+1]); > + } > } > > return 0; > @@ -118,6 +164,9 @@ static int mtk_vcodec_init_dec_resources(struct mtk_vcodec_dev *dev) > if (dev->dec_irq < 0) > return dev->dec_irq; > > + dev->vdecsys_regmap = syscon_regmap_lookup_by_phandle_optional(pdev->dev.of_node, > + "mediatek,vdecsys"); > + It makes no sense to try to get a handle to this syscon if we're on the older layout with vdecsys in the `reg` list: in that case, we can safely assume that we don't have any mediatek,vdecsys syscon. Cheers, Angelo
diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c index 83780d29a9cf..387ed26d6d5d 100644 --- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c +++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c @@ -8,10 +8,12 @@ #include <linux/slab.h> #include <linux/interrupt.h> #include <linux/irq.h> +#include <linux/mfd/syscon.h> #include <linux/module.h> #include <linux/of_device.h> #include <linux/of.h> #include <linux/pm_runtime.h> +#include <linux/regmap.h> #include <media/v4l2-event.h> #include <media/v4l2-mem2mem.h> #include <media/videobuf2-dma-contig.h> @@ -38,22 +40,37 @@ static int mtk_vcodec_get_hw_count(struct mtk_vcodec_dev *dev) } } +static bool mtk_vcodec_is_hw_active(struct mtk_vcodec_dev *dev) +{ + u32 cg_status = 0; + int val, ret; + + if (!dev->reg_base[VDEC_SYS]) { + ret = regmap_read(dev->vdecsys_regmap, VDEC_HW_ACTIVE_ADDR, &val); + if (ret) { + mtk_v4l2_err("Failed to read VDEC active status"); + return false; + } + + return (val & VDEC_HW_ACTIVE_MASK) == 0; + } + + cg_status = readl(dev->reg_base[VDEC_SYS] + VDEC_HW_ACTIVE_ADDR); + return (cg_status & VDEC_HW_ACTIVE_MASK) == 0; +} + static irqreturn_t mtk_vcodec_dec_irq_handler(int irq, void *priv) { struct mtk_vcodec_dev *dev = priv; struct mtk_vcodec_ctx *ctx; - u32 cg_status = 0; unsigned int dec_done_status = 0; void __iomem *vdec_misc_addr = dev->reg_base[VDEC_MISC] + VDEC_IRQ_CFG_REG; ctx = mtk_vcodec_get_curr_ctx(dev, MTK_VDEC_CORE); - /* check if HW active or not */ - cg_status = readl(dev->reg_base[0] + VDEC_HW_ACTIVE_ADDR); - if ((cg_status & VDEC_HW_ACTIVE_MASK) != 0) { - mtk_v4l2_err("DEC ISR, VDEC active is not 0x0 (0x%08x)", - cg_status); + if (!mtk_vcodec_is_hw_active(dev)) { + mtk_v4l2_err("DEC ISR, VDEC active is not 0x0"); return IRQ_HANDLED; } @@ -82,6 +99,25 @@ static int mtk_vcodec_get_reg_bases(struct mtk_vcodec_dev *dev) { struct platform_device *pdev = dev->plat_dev; int reg_num, i; + struct resource *res; + bool no_vdecsys_reg = false; + static const char * const mtk_dec_reg_names[] = { + "misc", + "ld", + "top", + "cm", + "ad", + "av", + "pp", + "hwd", + "hwq", + "hwb", + "hwg" + }; + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "misc"); + if (res) + no_vdecsys_reg = true; /* Sizeof(u32) * 4 bytes for each register base. */ reg_num = of_property_count_elems_of_size(pdev->dev.of_node, "reg", @@ -91,12 +127,22 @@ static int mtk_vcodec_get_reg_bases(struct mtk_vcodec_dev *dev) 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]); + if (!no_vdecsys_reg) { + 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]); + } + } else { + for (i = 0; i < reg_num; i++) { + dev->reg_base[i+1] = devm_platform_ioremap_resource_byname(pdev, mtk_dec_reg_names[i]); + if (IS_ERR(dev->reg_base[i+1])) + return PTR_ERR(dev->reg_base[i+1]); - mtk_v4l2_debug(2, "reg[%d] base=%p", i, dev->reg_base[i]); + mtk_v4l2_debug(2, "reg[%d] base=%p", i+1, dev->reg_base[i+1]); + } } return 0; @@ -118,6 +164,9 @@ static int mtk_vcodec_init_dec_resources(struct mtk_vcodec_dev *dev) if (dev->dec_irq < 0) return dev->dec_irq; + dev->vdecsys_regmap = syscon_regmap_lookup_by_phandle_optional(pdev->dev.of_node, + "mediatek,vdecsys"); + irq_set_status_flags(dev->dec_irq, IRQ_NOAUTOEN); ret = devm_request_irq(&pdev->dev, dev->dec_irq, mtk_vcodec_dec_irq_handler, 0, pdev->name, dev); diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h index f17d67e781c9..0b430936f67d 100644 --- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h +++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h @@ -489,6 +489,7 @@ struct mtk_vcodec_dev { void __iomem *reg_base[NUM_MAX_VCODEC_REG_BASE]; const struct mtk_vcodec_dec_pdata *vdec_pdata; const struct mtk_vcodec_enc_pdata *venc_pdata; + struct regmap *vdecsys_regmap; struct mtk_vcodec_fw *fw_handler;
Remove the requirement of a VDEC_SYS reg iospace for MT8183. To achieve that, rely on a vdecsys syscon to be passed through the DT, and use it to directly read the VDEC_HW_ACTIVE bit during IRQ handling to check whether the HW is active. The old behavior is still present when reg-names aren't supplied, as MT8173 still relies on it. Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com> --- I dropped the tags from this commit since a syscon is now used instead of an extra clock. Changes in v3: - Switched handling of VDEC_HW_ACTIVE to use a syscon instead of the 'active' clock - Reworded commit - Removed changes to subdev part of driver, since they aren't used by MT8183 .../mediatek/vcodec/mtk_vcodec_dec_drv.c | 71 ++++++++++++++++--- .../platform/mediatek/vcodec/mtk_vcodec_drv.h | 1 + 2 files changed, 61 insertions(+), 11 deletions(-)