[PATCH v4 5/7] media: mediatek: vcodec: Read HW active status from syscon
From: Nícolas F. R. A. Prado
Date: Tue Jun 27 2023 - 17:46:53 EST
Remove the requirement of a VDEC_SYS reg iospace for both MT8173 and
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. Also update the VP8 stateful
decoder to use the syscon, if present, for writes to VDEC_SYS.
The old behavior is still present when reg-names aren't supplied, as
to keep backward compatibility.
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@xxxxxxxxxxxxx>
---
Changes in v4:
- Added new helper and updated VP8 stateful decoder to use it, so the
syscon can also be used by mt8173
- Made handling cleaner
- Reworded commit
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 | 76 ++++++++++++++++---
.../platform/mediatek/vcodec/mtk_vcodec_drv.h | 1 +
.../mediatek/vcodec/mtk_vcodec_util.c | 15 ++++
.../mediatek/vcodec/mtk_vcodec_util.h | 2 +
.../mediatek/vcodec/vdec/vdec_vp8_if.c | 10 +--
5 files changed, 86 insertions(+), 18 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..d83c2eb6f118 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 +40,30 @@ 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;
+
+ if (dev->vdecsys_regmap)
+ return !regmap_test_bits(dev->vdecsys_regmap, VDEC_HW_ACTIVE_ADDR,
+ VDEC_HW_ACTIVE_MASK);
+
+ cg_status = readl(dev->reg_base[VDEC_SYS] + VDEC_HW_ACTIVE_ADDR);
+ return !FIELD_GET(VDEC_HW_ACTIVE_MASK, cg_status);
+}
+
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 +92,33 @@ 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 has_vdecsys_reg;
+ static const char * const mtk_dec_reg_names[] = {
+ "misc",
+ "ld",
+ "top",
+ "cm",
+ "ad",
+ "av",
+ "pp",
+ "hwd",
+ "hwq",
+ "hwb",
+ "hwg"
+ };
+
+ /*
+ * 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;
/* Sizeof(u32) * 4 bytes for each register base. */
reg_num = of_property_count_elems_of_size(pdev->dev.of_node, "reg",
@@ -91,12 +128,29 @@ 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 (has_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]);
+ }
+
+ dev->vdecsys_regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
+ "mediatek,vdecsys");
+ if (IS_ERR(dev->vdecsys_regmap)) {
+ dev_err(&pdev->dev, "Missing mediatek,vdecsys property");
+ return PTR_ERR(dev->vdecsys_regmap);
+ }
}
return 0;
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;
diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_util.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_util.c
index f214e6f67005..8aaa5eb45444 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_util.c
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_util.c
@@ -8,6 +8,7 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
+#include <linux/regmap.h>
#include "mtk_vcodec_dec_hw.h"
#include "mtk_vcodec_drv.h"
@@ -34,6 +35,20 @@ void __iomem *mtk_vcodec_get_reg_addr(struct mtk_vcodec_ctx *data,
}
EXPORT_SYMBOL(mtk_vcodec_get_reg_addr);
+int mtk_vcodec_write_vdecsys(struct mtk_vcodec_ctx *ctx, unsigned int reg,
+ unsigned int val)
+{
+ struct mtk_vcodec_dev *dev = ctx->dev;
+
+ if (dev->vdecsys_regmap)
+ return regmap_write(dev->vdecsys_regmap, reg, val);
+
+ writel(val, dev->reg_base[VDEC_SYS] + reg);
+
+ return 0;
+}
+EXPORT_SYMBOL(mtk_vcodec_write_vdecsys);
+
int mtk_vcodec_mem_alloc(struct mtk_vcodec_ctx *data,
struct mtk_vcodec_mem *mem)
{
diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_util.h b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_util.h
index 88d389b65f13..c8bb4fc5153f 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_util.h
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_util.h
@@ -70,6 +70,8 @@ extern int mtk_vcodec_dbg;
void __iomem *mtk_vcodec_get_reg_addr(struct mtk_vcodec_ctx *data,
unsigned int reg_idx);
+int mtk_vcodec_write_vdecsys(struct mtk_vcodec_ctx *ctx, unsigned int reg,
+ unsigned int val);
int mtk_vcodec_mem_alloc(struct mtk_vcodec_ctx *data,
struct mtk_vcodec_mem *mem);
void mtk_vcodec_mem_free(struct mtk_vcodec_ctx *data,
diff --git a/drivers/media/platform/mediatek/vcodec/vdec/vdec_vp8_if.c b/drivers/media/platform/mediatek/vcodec/vdec/vdec_vp8_if.c
index 88c046731754..2592fa37b4c8 100644
--- a/drivers/media/platform/mediatek/vcodec/vdec/vdec_vp8_if.c
+++ b/drivers/media/platform/mediatek/vcodec/vdec/vdec_vp8_if.c
@@ -91,7 +91,6 @@ struct vdec_vp8_vsi {
/**
* struct vdec_vp8_hw_reg_base - HW register base
- * @sys : base address for sys
* @misc : base address for misc
* @ld : base address for ld
* @top : base address for top
@@ -100,7 +99,6 @@ struct vdec_vp8_vsi {
* @hwb : base address for hwb
*/
struct vdec_vp8_hw_reg_base {
- void __iomem *sys;
void __iomem *misc;
void __iomem *ld;
void __iomem *top;
@@ -170,7 +168,6 @@ static void get_hw_reg_base(struct vdec_vp8_inst *inst)
inst->reg_base.top = mtk_vcodec_get_reg_addr(inst->ctx, VDEC_TOP);
inst->reg_base.cm = mtk_vcodec_get_reg_addr(inst->ctx, VDEC_CM);
inst->reg_base.hwd = mtk_vcodec_get_reg_addr(inst->ctx, VDEC_HWD);
- inst->reg_base.sys = mtk_vcodec_get_reg_addr(inst->ctx, VDEC_SYS);
inst->reg_base.misc = mtk_vcodec_get_reg_addr(inst->ctx, VDEC_MISC);
inst->reg_base.ld = mtk_vcodec_get_reg_addr(inst->ctx, VDEC_LD);
inst->reg_base.hwb = mtk_vcodec_get_reg_addr(inst->ctx, VDEC_HWB);
@@ -222,17 +219,16 @@ static void read_hw_segmentation_data(struct vdec_vp8_inst *inst)
static void enable_hw_rw_function(struct vdec_vp8_inst *inst)
{
u32 val = 0;
- void __iomem *sys = inst->reg_base.sys;
void __iomem *misc = inst->reg_base.misc;
void __iomem *ld = inst->reg_base.ld;
void __iomem *hwb = inst->reg_base.hwb;
void __iomem *hwd = inst->reg_base.hwd;
- writel(0x1, sys + VP8_RW_CKEN_SET);
+ mtk_vcodec_write_vdecsys(inst->ctx, VP8_RW_CKEN_SET, 0x1);
writel(0x101, ld + VP8_WO_VLD_SRST);
writel(0x101, hwb + VP8_WO_VLD_SRST);
- writel(1, sys);
+ mtk_vcodec_write_vdecsys(inst->ctx, 0, 0x1);
val = readl(misc + VP8_RW_MISC_SRST);
writel((val & 0xFFFFFFFE), misc + VP8_RW_MISC_SRST);
@@ -241,7 +237,7 @@ static void enable_hw_rw_function(struct vdec_vp8_inst *inst)
writel(0x71201100, misc + VP8_RW_MISC_FUNC_CON);
writel(0x0, ld + VP8_WO_VLD_SRST);
writel(0x0, hwb + VP8_WO_VLD_SRST);
- writel(0x1, sys + VP8_RW_DCM_CON);
+ mtk_vcodec_write_vdecsys(inst->ctx, VP8_RW_DCM_CON, 0x1);
writel(0x1, misc + VP8_RW_MISC_DCM_CON);
writel(0x1, hwd + VP8_RW_VP8_CTRL);
}
--
2.41.0