ipu 的部份，suspend 時存起來的 register: /* save double buffer select regs */ ipu_cha_db_mode_reg[0] = __raw_readl(IPU_CHA_DB_MODE_SEL(0)); ipu_cha_db_mode_reg[1] = __raw_readl(IPU_CHA_DB_MODE_SEL(32)); ipu_cha_db_mode_reg[2] = __raw_readl(IPU_ALT_CHA_DB_MODE_SEL(0)); ipu_cha_db_mode_reg[3] = __raw_readl(IPU_ALT_CHA_DB_MODE_SEL(32)); /* save triple buffer select regs */ ipu_cha_trb_mode_reg[0] = __raw_readl(IPU_CHA_TRB_MODE_SEL(0)); ipu_cha_trb_mode_reg[1] = __raw_readl(IPU_CHA_TRB_MODE_SEL(32)); /* save current buffer regs */ ipu_cha_cur_buf_reg[0] = __raw_readl(IPU_CHA_CUR_BUF(0)); ipu_cha_cur_buf_reg[1] = __raw_readl(IPU_CHA_CUR_BUF(32)); ipu_cha_cur_buf_reg[2] = __raw_readl(IPU_ALT_CUR_BUF0); ipu_cha_cur_buf_reg[3] = __raw_readl(IPU_ALT_CUR_BUF1); /* save current triple buffer regs */ ipu_cha_triple_cur_buf_reg[0] = __raw_readl(IPU_CHA_TRIPLE_CUR_BUF(0)); ipu_cha_triple_cur_buf_reg[1] = __raw_readl(IPU_CHA_TRIPLE_CUR_BUF(32)); ipu_cha_triple_cur_buf_reg[2] = __raw_readl(IPU_CHA_TRIPLE_CUR_BUF(64)); ipu_cha_triple_cur_buf_reg[3] = __raw_readl(IPU_CHA_TRIPLE_CUR_BUF(96)); /* save idamc sub addr regs */ idma_sub_addr_reg[0] = __raw_readl(IDMAC_SUB_ADDR_0); idma_sub_addr_reg[1] = __raw_readl(IDMAC_SUB_ADDR_1); idma_sub_addr_reg[2] = __raw_readl(IDMAC_SUB_ADDR_2); idma_sub_addr_reg[3] = __raw_readl(IDMAC_SUB_ADDR_3); idma_sub_addr_reg[4] = __raw_readl(IDMAC_SUB_ADDR_4); /* save sub-modules status and disable all */ ic_conf_reg = __raw_readl(IC_CONF); __raw_writel(0, IC_CONF); ipu_conf_reg = __raw_readl(IPU_CONF); __raw_writel(0, IPU_CONF); /* save buf ready regs */ buf_ready_reg[0] = __raw_readl(IPU_CHA_BUF0_RDY(0)); buf_ready_reg[1] = __raw_readl(IPU_CHA_BUF0_RDY(32)); buf_ready_reg[2] = __raw_readl(IPU_CHA_BUF1_RDY(0)); buf_ready_reg[3] = __raw_readl(IPU_CHA_BUF1_RDY(32)); buf_ready_reg[4] = __raw_readl(IPU_ALT_CHA_BUF0_RDY(0)); buf_ready_reg[5] = __raw_readl(IPU_ALT_CHA_BUF0_RDY(32)); buf_ready_reg[6] = __raw_readl(IPU_ALT_CHA_BUF1_RDY(0)); buf_ready_reg[7] = __raw_readl(IPU_ALT_CHA_BUF1_RDY(32)); buf_ready_reg[8] = __raw_readl(IPU_CHA_BUF2_RDY(0)); buf_ready_reg[9] = __raw_readl(IPU_CHA_BUF2_RDY(32));
uninit_channel MEM_PRP_VF_MEM 時，有寫到的 register: /* Reset the double buffer */ reg = __raw_readl(IPU_CHA_DB_MODE_SEL(in_dma)); __raw_writel(reg & ~idma_mask(in_dma), IPU_CHA_DB_MODE_SEL(in_dma)); reg = __raw_readl(IPU_CHA_DB_MODE_SEL(out_dma)); __raw_writel(reg & ~idma_mask(out_dma), IPU_CHA_DB_MODE_SEL(out_dma)); /* Reset the triple buffer */ reg = __raw_readl(IPU_CHA_TRB_MODE_SEL(in_dma)); __raw_writel(reg & ~idma_mask(in_dma), IPU_CHA_TRB_MODE_SEL(in_dma)); reg = __raw_readl(IPU_CHA_TRB_MODE_SEL(out_dma)); __raw_writel(reg & ~idma_mask(out_dma), IPU_CHA_TRB_MODE_SEL(out_dma)); /* case MEM_PRP_VF_MEM */ _ipu_ic_uninit_prpvf(); _ipu_vdi_uninit(); reg = __raw_readl(IPU_FS_PROC_FLOW1); __raw_writel(reg & ~FS_VF_IN_VALID, IPU_FS_PROC_FLOW1); /* misc */ __raw_writel(ipu_conf, IPU_CONF); 結果重點是最後的 clk_disable，只要clk 沒關，就resume 不起來..