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- Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, wsd_upstream@mediatek.com, David Airlie , Jassi Brar , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, HS Liao , Rob Herring , linux-mediatek@lists.infradead.org, Houlong Wei , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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 >>> > _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel