v4l2-dbg: print register name when known

From: Mauro Carvalho Chehab <mchehab@redhat.com>

Priority: normal

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/utils/v4l2-dbg.cpp b/utils/v4l2-dbg.cpp
index c1e107d..87044e8 100644 (file)
--- a/utils/v4l2-dbg.cpp
+++ b/utils/v4l2-dbg.cpp
@@ -293,6 +293,21 @@ static unsigned long long parse_reg(const struct board_list *curr_bd, const std:
        return strtoull(reg.c_str(), NULL, 0);
 }
 
+static const char *reg_name(const struct board_list *curr_bd, unsigned long long reg)
+{
+       if (curr_bd) {
+               for (int i = 0; i < curr_bd->regs_size; i++) {
+                       if (reg == curr_bd->regs[i].reg)
+                               return curr_bd->regs[i].name;
+               }
+               for (int i = 0; i < curr_bd->alt_regs_size; i++) {
+                       if (reg == curr_bd->regs[i].reg)
+                               return curr_bd->regs[i].name;
+               }
+       }
+       return NULL;
+}
+
 static const char *binary(unsigned long long val)
 {
        static char bin[80];
@@ -582,9 +597,19 @@ int main(int argc, char **argv)
                        if (ioctl(fd, VIDIOC_DBG_G_REGISTER, &get_reg) < 0)
                                fprintf(stderr, "ioctl: VIDIOC_DBG_G_REGISTER "
                                                "failed for 0x%llx\n", get_reg.reg);
-                       else
-                               printf("%llx = %llxh = %lldd = %sb\n", get_reg.reg,
+                       else {
+                               const char *name = reg_name(curr_bd, get_reg.reg);
+
+                               printf("Register ");
+
+                               if (name)
+                                       printf("%s", name);
+                               else
+                                       printf("0x%08llx", get_reg.reg);
+
+                               printf(" = %llxh (%lldd  %sb)\n",
                                        get_reg.val, get_reg.val, binary(get_reg.val));
+                       }
                }
        }