| Message ID | 20220421234240.1694-15-laurent.pinchart@ideasonboard.com |
|---|---|
| State | Accepted |
| Commit | cbb819c363c572715ddba8ea8a049392629707a4 |
| Headers | show |
| Series | media: rkisp1: Misc bug fixes and cleanups | expand |
Hi Ricardo, On Mon, Apr 25, 2022 at 01:08:08PM +0200, Ricardo Ribalda wrote: > Laurent Pinchart wrote: > > > The ISP_FLAGS_SHD register exposes the ISP parallel input signals (data > > and synchronization) in real time. This can help debugging when the > > device doesn't output any image. Sample the register 10000 times with a > > 1µs delay and expose the result through debugfs. > > I think this is quite clever :) Thank you :-) > Out of curiosity, how long does reading the debug file takes? # time cat /sys/kernel/debug/32e10000.isp/input_status [...] real 0m 0.03s user 0m 0.00s sys 0m 0.02s > > Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> > > Signed-off-by: Paul Elder <paul.elder@ideasonboard.com> > > Reviewed-by: Ricardo Ribalda <ribalda@chromium.org> > > > --- > > Changes since v3: > > > > - Fix pm_runtime_get_if_in_use() return value handling > > > > Changes since v2: > > > > - Handle runtime PM > > --- > > .../platform/rockchip/rkisp1/rkisp1-debug.c | 54 +++++++++++++++++++ > > .../platform/rockchip/rkisp1/rkisp1-regs.h | 9 ++++ > > 2 files changed, 63 insertions(+) > > > > diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-debug.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-debug.c > > index 64b33774cbdf..782a696ac587 100644 > > --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-debug.c > > +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-debug.c > > @@ -9,9 +9,61 @@ > > */ > > > > #include <linux/debugfs.h> > > +#include <linux/delay.h> > > #include <linux/device.h> > > +#include <linux/pm_runtime.h> > > +#include <linux/seq_file.h> > > > > #include "rkisp1-common.h" > > +#include "rkisp1-regs.h" > > + > > +#define RKISP1_DEBUG_DATA_COUNT_BINS 32 > > +#define RKISP1_DEBUG_DATA_COUNT_STEP (4096 / RKISP1_DEBUG_DATA_COUNT_BINS) > > + > > +static int rkisp1_debug_input_status_show(struct seq_file *m, void *p) > > +{ > > + struct rkisp1_device *rkisp1 = m->private; > > + u16 data_count[RKISP1_DEBUG_DATA_COUNT_BINS] = { }; > > + unsigned int hsync_count = 0; > > + unsigned int vsync_count = 0; > > + unsigned int i; > > + u32 data; > > + u32 val; > > + int ret; > > + > > + ret = pm_runtime_get_if_in_use(rkisp1->dev); > > + if (ret <= 0) > > + return ret ? : -ENODATA; > > + > > + /* Sample the ISP input port status 10000 times with a 1µs interval. */ > > + for (i = 0; i < 10000; ++i) { > > + val = rkisp1_read(rkisp1, RKISP1_CIF_ISP_FLAGS_SHD); > > + > > + data = (val & RKISP1_CIF_ISP_FLAGS_SHD_S_DATA_MASK) > > + >> RKISP1_CIF_ISP_FLAGS_SHD_S_DATA_SHIFT; > > + data_count[data / RKISP1_DEBUG_DATA_COUNT_STEP]++; > > + > > + if (val & RKISP1_CIF_ISP_FLAGS_SHD_S_HSYNC) > > + hsync_count++; > > + if (val & RKISP1_CIF_ISP_FLAGS_SHD_S_VSYNC) > > + vsync_count++; > > + > > + udelay(1); > > + } > > + > > + pm_runtime_put(rkisp1->dev); > > + > > + seq_printf(m, "vsync: %u, hsync: %u\n", vsync_count, hsync_count); > > + seq_puts(m, "data:\n"); > > + for (i = 0; i < ARRAY_SIZE(data_count); ++i) > > + seq_printf(m, "- [%04u:%04u]: %u\n", > > + i * RKISP1_DEBUG_DATA_COUNT_STEP, > > + (i + 1) * RKISP1_DEBUG_DATA_COUNT_STEP - 1, > > + data_count[i]); > > + > > + return 0; > > +} > > +DEFINE_SHOW_ATTRIBUTE(rkisp1_debug_input_status); > > > > void rkisp1_debug_init(struct rkisp1_device *rkisp1) > > { > > @@ -42,6 +94,8 @@ void rkisp1_debug_init(struct rkisp1_device *rkisp1) > > &debug->frame_drop[RKISP1_MAINPATH]); > > debugfs_create_ulong("sp_frame_drop", 0444, debug->debugfs_dir, > > &debug->frame_drop[RKISP1_SELFPATH]); > > + debugfs_create_file("input_status", 0444, debug->debugfs_dir, rkisp1, > > + &rkisp1_debug_input_status_fops); > > } > > > > void rkisp1_debug_cleanup(struct rkisp1_device *rkisp1) > > diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-regs.h b/drivers/media/platform/rockchip/rkisp1/rkisp1-regs.h > > index a93d0127b813..2b322db97252 100644 > > --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-regs.h > > +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-regs.h > > @@ -454,6 +454,15 @@ > > #define RKISP1_CIF_ISP_DEMOSAIC_BYPASS BIT(10) > > #define RKISP1_CIF_ISP_DEMOSAIC_TH(x) ((x) & 0xFF) > > > > +/* ISP_FLAGS_SHD */ > > +#define RKISP1_CIF_ISP_FLAGS_SHD_ISP_ENABLE_SHD BIT(0) > > +#define RKISP1_CIF_ISP_FLAGS_SHD_ISP_ENABLE_INFORM_SHD BIT(1) > > +#define RKISP1_CIF_ISP_FLAGS_SHD_INFORM_FIELD BIT(2) > > +#define RKISP1_CIF_ISP_FLAGS_SHD_S_DATA_MASK GENMASK(27, 16) > > +#define RKISP1_CIF_ISP_FLAGS_SHD_S_DATA_SHIFT 16 > > +#define RKISP1_CIF_ISP_FLAGS_SHD_S_VSYNC BIT(30) > > +#define RKISP1_CIF_ISP_FLAGS_SHD_S_HSYNC BIT(31) > > + > > /* AWB */ > > /* ISP_AWB_PROP */ > > #define RKISP1_CIF_ISP_AWB_YMAX_CMP_EN BIT(2)
diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-debug.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-debug.c index 64b33774cbdf..782a696ac587 100644 --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-debug.c +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-debug.c @@ -9,9 +9,61 @@ */ #include <linux/debugfs.h> +#include <linux/delay.h> #include <linux/device.h> +#include <linux/pm_runtime.h> +#include <linux/seq_file.h> #include "rkisp1-common.h" +#include "rkisp1-regs.h" + +#define RKISP1_DEBUG_DATA_COUNT_BINS 32 +#define RKISP1_DEBUG_DATA_COUNT_STEP (4096 / RKISP1_DEBUG_DATA_COUNT_BINS) + +static int rkisp1_debug_input_status_show(struct seq_file *m, void *p) +{ + struct rkisp1_device *rkisp1 = m->private; + u16 data_count[RKISP1_DEBUG_DATA_COUNT_BINS] = { }; + unsigned int hsync_count = 0; + unsigned int vsync_count = 0; + unsigned int i; + u32 data; + u32 val; + int ret; + + ret = pm_runtime_get_if_in_use(rkisp1->dev); + if (ret <= 0) + return ret ? : -ENODATA; + + /* Sample the ISP input port status 10000 times with a 1µs interval. */ + for (i = 0; i < 10000; ++i) { + val = rkisp1_read(rkisp1, RKISP1_CIF_ISP_FLAGS_SHD); + + data = (val & RKISP1_CIF_ISP_FLAGS_SHD_S_DATA_MASK) + >> RKISP1_CIF_ISP_FLAGS_SHD_S_DATA_SHIFT; + data_count[data / RKISP1_DEBUG_DATA_COUNT_STEP]++; + + if (val & RKISP1_CIF_ISP_FLAGS_SHD_S_HSYNC) + hsync_count++; + if (val & RKISP1_CIF_ISP_FLAGS_SHD_S_VSYNC) + vsync_count++; + + udelay(1); + } + + pm_runtime_put(rkisp1->dev); + + seq_printf(m, "vsync: %u, hsync: %u\n", vsync_count, hsync_count); + seq_puts(m, "data:\n"); + for (i = 0; i < ARRAY_SIZE(data_count); ++i) + seq_printf(m, "- [%04u:%04u]: %u\n", + i * RKISP1_DEBUG_DATA_COUNT_STEP, + (i + 1) * RKISP1_DEBUG_DATA_COUNT_STEP - 1, + data_count[i]); + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(rkisp1_debug_input_status); void rkisp1_debug_init(struct rkisp1_device *rkisp1) { @@ -42,6 +94,8 @@ void rkisp1_debug_init(struct rkisp1_device *rkisp1) &debug->frame_drop[RKISP1_MAINPATH]); debugfs_create_ulong("sp_frame_drop", 0444, debug->debugfs_dir, &debug->frame_drop[RKISP1_SELFPATH]); + debugfs_create_file("input_status", 0444, debug->debugfs_dir, rkisp1, + &rkisp1_debug_input_status_fops); } void rkisp1_debug_cleanup(struct rkisp1_device *rkisp1) diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-regs.h b/drivers/media/platform/rockchip/rkisp1/rkisp1-regs.h index a93d0127b813..2b322db97252 100644 --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-regs.h +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-regs.h @@ -454,6 +454,15 @@ #define RKISP1_CIF_ISP_DEMOSAIC_BYPASS BIT(10) #define RKISP1_CIF_ISP_DEMOSAIC_TH(x) ((x) & 0xFF) +/* ISP_FLAGS_SHD */ +#define RKISP1_CIF_ISP_FLAGS_SHD_ISP_ENABLE_SHD BIT(0) +#define RKISP1_CIF_ISP_FLAGS_SHD_ISP_ENABLE_INFORM_SHD BIT(1) +#define RKISP1_CIF_ISP_FLAGS_SHD_INFORM_FIELD BIT(2) +#define RKISP1_CIF_ISP_FLAGS_SHD_S_DATA_MASK GENMASK(27, 16) +#define RKISP1_CIF_ISP_FLAGS_SHD_S_DATA_SHIFT 16 +#define RKISP1_CIF_ISP_FLAGS_SHD_S_VSYNC BIT(30) +#define RKISP1_CIF_ISP_FLAGS_SHD_S_HSYNC BIT(31) + /* AWB */ /* ISP_AWB_PROP */ #define RKISP1_CIF_ISP_AWB_YMAX_CMP_EN BIT(2)