Hi Vinod, On 25 September 2017 at 17:47, Vinod Koul <vinod.koul@xxxxxxxxx> wrote: > On Thu, Sep 07, 2017 at 06:00:04PM +0800, Baolin Wang wrote: > >> +static void sprd_dma_chn_update(struct sprd_dma_chn *schan, u32 reg, >> + u32 mask, u32 val) > > right justfied pls I have made these to right justified, but I do not know why it looks like in this email. I checked the patch in patchwork[1], it already right justified. But I will check again to make sure they are right justified. [1] https://patchwork.kernel.org/patch/9942025/ > >> +static void sprd_dma_clear_int(struct sprd_dma_chn *schan) >> +{ >> + u32 mask = SPRD_DMA_INT_MASK << SPRD_DMA_INT_CLR_OFFSET; >> + u32 val = SPRD_DMA_INT_MASK << SPRD_DMA_INT_CLR_OFFSET; > > both seems same..? Yes, I will save one line here in next version. > >> + >> + sprd_dma_chn_update(schan, SPRD_DMA_CHN_INTC, mask, val); > > do you need local values here, we can just call sprd_dma_chn_update() with > the mask and values! Sine I want to keep this function to make things clear when users can know what is going on from the function name. But if you think they are redundant, I will remove these local values in next version. > > Also looking at thus shoulnt SPRD_DMA_INT_MASK bits be defined for the bits > we have in spec, if so why are we shifting then, perhpas u should redo the > clear routine to pass mask, shift, bits..? > > Same comment for this and others OK. > >> +static enum dma_int_type sprd_dma_get_int_type(struct sprd_dma_chn *schan) >> +{ >> + u32 intc_sts = readl(schan->chn_base + SPRD_DMA_CHN_INTC) & >> + SPRD_DMA_CHN_INT_STS; > > right justfied OK. > >> +static enum dma_request_mode sprd_dma_get_req_type(struct sprd_dma_chn *schan) >> +{ >> + u32 frag_reg = readl(schan->chn_base + SPRD_DMA_CHN_FRG_LEN); >> + u32 req_type = (frag_reg >> SPRD_DMA_REQ_MODE_OFFSET) & >> + SPRD_DMA_REQ_MODE_MASK; >> + >> + switch (req_type) { >> + case 0: >> + return SPRD_DMA_FRAG_REQ; > > which is 0 > >> + >> + case 1: >> + return SPRD_DMA_BLK_REQ; > > and 1 and so on so why the coonversion? > > you can do: > > switch (req_type) { > case 0: > case 1: > case 2: > case 3: > return req_type; > default: > return SPRD_DMA_FRAG_REQ; Make sense. > >> + >> + case 2: >> + return SPRD_DMA_TRANS_REQ; >> + >> + case 3: >> + return SPRD_DMA_LIST_REQ; >> + >> + default: >> + return SPRD_DMA_FRAG_REQ; >> + } >> +} >> + if ((src_step != 0 && des_step != 0) || (src_step | des_step) == 0) { >> + fix_en = 0; >> + } else { >> + fix_en = 1; >> + if (src_step) >> + fix_mode = 1; >> + else >> + fix_mode = 0; >> + } >> + >> + hw->frg_len = datawidth << SPRD_DMA_SRC_DATAWIDTH_OFFSET | >> + datawidth << SPRD_DMA_DES_DATAWIDTH_OFFSET | >> + req_mode << SPRD_DMA_REQ_MODE_OFFSET | >> + fix_mode << SPRD_DMA_FIX_SEL_OFFSET | >> + fix_en << SPRD_DMA_FIX_SEL_EN | >> + (fragment_len & SPRD_DMA_FRG_LEN_MASK); >> + hw->blk_len = block_len & SPRD_DMA_BLK_LEN_MASK; >> + >> + hw->intc = SPRD_DMA_CFG_ERR_INT_EN; > > empty line here please OK. > >> + switch (irq_mode) { >> + case SPRD_DMA_NO_INT: >> + break; > > no handling? Yes, we do not need to set any irq type enabled here. > >> + case SPRD_DMA_FRAG_INT: >> + hw->intc |= SPRD_DMA_FRAG_INT_EN; >> + break; > > empty line after break helps readablity OK. I will check the whole file. > >> + case SPRD_DMA_BLK_INT: >> + hw->intc |= SPRD_DMA_BLK_INT_EN; >> + break; >> + case SPRD_DMA_BLK_FRAG_INT: >> + hw->intc |= SPRD_DMA_BLK_INT_EN | SPRD_DMA_FRAG_INT_EN; >> + break; >> + case SPRD_DMA_TRANS_INT: >> + hw->intc |= SPRD_DMA_TRANS_INT_EN; >> + break; >> + case SPRD_DMA_TRANS_FRAG_INT: >> + hw->intc |= SPRD_DMA_TRANS_INT_EN | SPRD_DMA_FRAG_INT_EN; >> + break; >> + case SPRD_DMA_TRANS_BLK_INT: >> + hw->intc |= SPRD_DMA_TRANS_INT_EN | SPRD_DMA_BLK_INT_EN; >> + break; >> + case SPRD_DMA_LIST_INT: >> + hw->intc |= SPRD_DMA_LIST_INT_EN; >> + break; >> + case SPRD_DMA_CFGERR_INT: >> + hw->intc |= SPRD_DMA_CFG_ERR_INT_EN; >> + break; >> + default: >> + dev_err(sdev->dma_dev.dev, "invalid irq mode\n"); >> + return -EINVAL; > > [snip] > >> +struct dma_async_tx_descriptor *sprd_dma_prep_dma_memcpy(struct dma_chan *chan, >> + dma_addr_t dest, >> + dma_addr_t src, >> + size_t len, >> + unsigned long flags) >> +{ >> + struct sprd_dma_chn *schan = to_sprd_dma_chan(chan); >> + struct sprd_dma_desc *sdesc; >> + int ret; >> + >> + sdesc = kzalloc(sizeof(struct sprd_dma_desc), GFP_NOWAIT); > > sizeof(*sdesc) pls OK. > >> + ret = dma_async_device_register(&sdev->dma_dev); >> + if (ret < 0) { >> + dev_err(&pdev->dev, "register dma device failed:%d\n", ret); >> + goto err_register; >> + } >> + >> + sprd_dma_info.dma_cap = sdev->dma_dev.cap_mask; >> + ret = of_dma_controller_register(np, of_dma_simple_xlate, >> + &sprd_dma_info); >> + if (ret) >> + goto err_of_register; >> + >> + pm_runtime_put_sync(&pdev->dev); > > why put_sync, i though you didnt want these? Sorry, I missing this and I will fix this in next version. Thanks for your commnets. -- Baolin.wang Best Regards -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
