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<1590341462.31286.19.camel@mtkswgap22> From: Matthias Brugger Autocrypt: addr=matthias.bgg@gmail.com; prefer-encrypt=mutual; keydata= mQINBFP1zgUBEAC21D6hk7//0kOmsUrE3eZ55kjc9DmFPKIz6l4NggqwQjBNRHIMh04BbCMY fL3eT7ZsYV5nur7zctmJ+vbszoOASXUpfq8M+S5hU2w7sBaVk5rpH9yW8CUWz2+ZpQXPJcFa OhLZuSKB1F5JcvLbETRjNzNU7B3TdS2+zkgQQdEyt7Ij2HXGLJ2w+yG2GuR9/iyCJRf10Okq gTh//XESJZ8S6KlOWbLXRE+yfkKDXQx2Jr1XuVvM3zPqH5FMg8reRVFsQ+vI0b+OlyekT/Xe 0Hwvqkev95GG6x7yseJwI+2ydDH6M5O7fPKFW5mzAdDE2g/K9B4e2tYK6/rA7Fq4cqiAw1+u EgO44+eFgv082xtBez5WNkGn18vtw0LW3ESmKh19u6kEGoi0WZwslCNaGFrS4M7OH+aOJeqK fx5dIv2CEbxc6xnHY7dwkcHikTA4QdbdFeUSuj4YhIZ+0QlDVtS1QEXyvZbZky7ur9rHkZvP ZqlUsLJ2nOqsmahMTIQ8Mgx9SLEShWqD4kOF4zNfPJsgEMB49KbS2o9jxbGB+JKupjNddfxZ HlH1KF8QwCMZEYaTNogrVazuEJzx6JdRpR3sFda/0x5qjTadwIW6Cl9tkqe2h391dOGX1eOA 1ntn9O/39KqSrWNGvm+1raHK+Ev1yPtn0Wxn+0oy1tl67TxUjQARAQABtClNYXR0aGlhcyBC cnVnZ2VyIDxtYXR0aGlhcy5iZ2dAZ21haWwuY29tPokCUgQTAQIAPAIbAwYLCQgHAwIGFQgC 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Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 24/05/2020 19:31, Dennis-YC Hsieh wrote: > Hi Matthias, > > Thanks for your comment. > > On Sat, 2020-05-16 at 20:20 +0200, Matthias Brugger wrote: >> >> On 08/03/2020 11:52, Dennis YC Hsieh wrote: >>> add write_s function in cmdq helper functions which >>> writes a constant value to address with large dma >>> access support. >>> >>> Signed-off-by: Dennis YC Hsieh >>> Reviewed-by: CK Hu >>> --- >>> drivers/soc/mediatek/mtk-cmdq-helper.c | 26 ++++++++++++++++++++++++++ >>> include/linux/soc/mediatek/mtk-cmdq.h | 14 ++++++++++++++ >>> 2 files changed, 40 insertions(+) >>> >>> diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c >>> index 03c129230cd7..a9ebbabb7439 100644 >>> --- a/drivers/soc/mediatek/mtk-cmdq-helper.c >>> +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c >>> @@ -269,6 +269,32 @@ int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx, >>> } >>> EXPORT_SYMBOL(cmdq_pkt_write_s); >>> >>> +int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u16 high_addr_reg_idx, >>> + u16 addr_low, u32 value, u32 mask) >>> +{ >>> + struct cmdq_instruction inst = { {0} }; >>> + int err; >>> + >>> + if (mask != U32_MAX) { >>> + inst.op = CMDQ_CODE_MASK; >>> + inst.mask = ~mask; >>> + err = cmdq_pkt_append_command(pkt, inst); >>> + if (err < 0) >>> + return err; >>> + >>> + inst.op = CMDQ_CODE_WRITE_S_MASK; >>> + } else { >>> + inst.op = CMDQ_CODE_WRITE_S; >>> + } >>> + >>> + inst.sop = high_addr_reg_idx; >> >> Writing u16 value in a 5 bit wide variable? > > We need only 5 bits in this case. I'll change high_addr_reg_idx > parameter to u8. > Ok, please make sure to mask the value, so that it's explicit in the code that we only use the lowest 5 bits of high_addr_reg_idx. Regards, Matthias >> >>> + inst.offset = addr_low; >>> + inst.value = value; >>> + >>> + return cmdq_pkt_append_command(pkt, inst); >>> +} >>> +EXPORT_SYMBOL(cmdq_pkt_write_s_value); >>> + >>> int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event) >>> { >>> struct cmdq_instruction inst = { {0} }; >>> diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h >>> index 01b4184af310..fec292aac83c 100644 >>> --- a/include/linux/soc/mediatek/mtk-cmdq.h >>> +++ b/include/linux/soc/mediatek/mtk-cmdq.h >>> @@ -135,6 +135,20 @@ int cmdq_pkt_read_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx, u16 addr_low, >>> int cmdq_pkt_write_s(struct cmdq_pkt *pkt, u16 high_addr_reg_idx, >>> u16 addr_low, u16 src_reg_idx, u32 mask); >>> >>> +/** >>> + * cmdq_pkt_write_s_value() - append write_s command with mask to the CMDQ >>> + * packet which write value to a physical address >>> + * @pkt: the CMDQ packet >>> + * @high_addr_reg_idx: internal regisger ID which contains high address of pa >> >> register > > will fix > > > Regards, > Dennis > >> >>> + * @addr_low: low address of pa >>> + * @value: the specified target value >>> + * @mask: the specified target mask >>> + * >>> + * Return: 0 for success; else the error code is returned >>> + */ >>> +int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u16 high_addr_reg_idx, >>> + u16 addr_low, u32 value, u32 mask); >>> + >>> /** >>> * cmdq_pkt_wfe() - append wait for event command to the CMDQ packet >>> * @pkt: the CMDQ packet >>> >