FEAT_REG_DISPC_CLK_SWITCH
dss_feat_get_reg_field(FEAT_REG_DISPC_CLK_SWITCH, &start, &end);
[FEAT_REG_DISPC_CLK_SWITCH] = { 9, 7 },
[FEAT_REG_DISPC_CLK_SWITCH] = { 0, 0 },
[FEAT_REG_DISPC_CLK_SWITCH] = { 0, 0 },
[FEAT_REG_DISPC_CLK_SWITCH] = { 0, 0 },
[FEAT_REG_DISPC_CLK_SWITCH] = { 9, 8 },