diff options
| -rw-r--r-- | drivers/gpu/drm/drm_print.c | 28 | ||||
| -rw-r--r-- | include/drm/drm_print.h | 2 |
2 files changed, 30 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_print.c b/drivers/gpu/drm/drm_print.c index 0e7fc3e7dfb4..f5cb0aabfe35 100644 --- a/drivers/gpu/drm/drm_print.c +++ b/drivers/gpu/drm/drm_print.c @@ -253,3 +253,31 @@ void drm_err(const char *format, ...) va_end(args); } EXPORT_SYMBOL(drm_err); + +/** + * drm_print_regset32 - print the contents of registers to a + * &drm_printer stream. + * + * @p: the &drm printer + * @regset: the list of registers to print. + * + * Often in driver debug, it's useful to be able to either capture the + * contents of registers in the steady state using debugfs or at + * specific points during operation. This lets the driver have a + * single list of registers for both. + */ +void drm_print_regset32(struct drm_printer *p, struct debugfs_regset32 *regset) +{ + int namelen = 0; + int i; + + for (i = 0; i < regset->nregs; i++) + namelen = max(namelen, (int)strlen(regset->regs[i].name)); + + for (i = 0; i < regset->nregs; i++) { + drm_printf(p, "%*s = 0x%08x\n", + namelen, regset->regs[i].name, + readl(regset->base + regset->regs[i].offset)); + } +} +EXPORT_SYMBOL(drm_print_regset32); diff --git a/include/drm/drm_print.h b/include/drm/drm_print.h index afbc3beef089..3a4247319e63 100644 --- a/include/drm/drm_print.h +++ b/include/drm/drm_print.h @@ -30,6 +30,7 @@ #include <linux/printk.h> #include <linux/seq_file.h> #include <linux/device.h> +#include <linux/debugfs.h> /** * DOC: print @@ -84,6 +85,7 @@ void __drm_printfn_debug(struct drm_printer *p, struct va_format *vaf); __printf(2, 3) void drm_printf(struct drm_printer *p, const char *f, ...); void drm_puts(struct drm_printer *p, const char *str); +void drm_print_regset32(struct drm_printer *p, struct debugfs_regset32 *regset); __printf(2, 0) /** |