GAM_MIXER_CTL
DBGFS_DUMP(GAM_MIXER_CTL);
mixer_dbg_ctl(s, sti_mixer_reg_read(mixer, GAM_MIXER_CTL));
u32 val = sti_mixer_reg_read(mixer, GAM_MIXER_CTL);
sti_mixer_reg_write(mixer, GAM_MIXER_CTL, val);
val = sti_mixer_reg_read(mixer, GAM_MIXER_CTL);
sti_mixer_reg_write(mixer, GAM_MIXER_CTL, val);