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Date: Tue, 13 Oct 2026 13:01:26 +0530 Message-Id: <20261013073126.5948-1-parame@synopsys.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDEzMDAyOSBTYWx0ZWRfXxWk6BnFiCsO4 wMVnveNu/pe+PG693NG284bZYZwZPx6pxGkYNSiRrPdkO8QpReHVNHiWs+QPL609zAx/d7Cb0uf 1sPsxUktw5sVCWFL1l3v+hW9tqvgcCgM0QVUIaxZpWYrqiC8BGRnPx6Sx5rhS+0qaWSyN70Nivj 80kxVjes/FNnXXZsTm7m8DAQ/Pk5sWQl3k2ItFbU+OoQWreyKkWdP9uRvH2caNqQH28ih5xK/rP r6yXa9MUkn/3qChVGwe9F4TJLJA+1x8ZYJcHfrP/VYhwpsjCGHJg8u07vLivPo854uMPUndgT7z n6pa98Cz2rOh/6Ach59OEkKiRSSmKUdC4Lb/QO2tIcOW64Vu7zStU52XRBPrKfLIU2JltcDKIPO nbAy/7SzGS1DOb0f5o9GTaB/8GJTsufGDzFE23pCaXI9xghaD80i57SXS2FnXTbcVi5G0djWZag FtI0n4u0DfaoAcivdog== X-Proofpoint-GUID: 43xQif-LFZZ6U_x2XNINNIr7PoA6FSB8 X-Proofpoint-ORIG-GUID: 43xQif-LFZZ6U_x2XNINNIr7PoA6FSB8 X-Authority-Analysis: v=2.4 cv=bZf+w+PB c=1 sm=1 tr=0 ts=6acdde57 cx=c_pps a=8EbXvwLXkpGsT4ql/pYRAw==:117 a=8EbXvwLXkpGsT4ql/pYRAw==:17 a=660iZSQnnn4A:10 a=qPHU084jO2kA:10 a=VkNPw1HP01LnGYTKEx00:22 a=tU_645BZ7FZt8VqRJtHG:22 a=jSPayVjLy6xbsuKauFBc:22 a=jIQo8A4GAAAA:8 a=z177fXb8LXOLxaScacMA:9 X-Proofpoint-Spam-Info: AW1haW4tMjYxMDEzMDAyOSBTYWx0ZWRfX5B3QKotfEwU9 VA3ETvCKVaL1BUwHeiUMcrYFiTqjVjhe2KMjtb1FVuQiAT1zxJll/yc6Lj4YzXu1uxjNWHv2woV 7OBjfVdVcoVmFji8M9eb7EXxlcCvC1g= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-10-13_01,2026-10-09_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_active_cloned_notspam policy=outbound_active_cloned score=0 priorityscore=1501 impostorscore=0 malwarescore=0 lowpriorityscore=0 suspectscore=0 phishscore=0 adultscore=0 spamscore=0 clxscore=1011 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610080000 definitions=main-2610130029 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261013_003145_565462_FEC745EE X-CRM114-Status: GOOD ( 12.05 ) X-BeenThere: linux-i3c@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-i3c" Errors-To: linux-i3c-bounces+linux-i3c=archiver.kernel.org@lists.infradead.org Implement HDR-DDR transfer support for the DesignWare Controller. Only support for private transfers and does not support sending CCC commands in HDR mode. Key differences: - Sends ENTHDR CCC for entering to HDR-DDR mode before sending data. To do that we are setting the ENTHDR in controller cmd. Sets the speed to HDR_DDR_SPEED(6) to do data transfer in HDR-DDR mode. - HDR exit pattern must be sent instead of send a stop after transfer completion. Signed-off-by: Dineshkumar Parameswaran --- drivers/i3c/master/dw-i3c-master.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/i3c/master/dw-i3c-master.c b/drivers/i3c/master/dw-i3c-master.c index 05584ddaf104..58c54746bbe5 100644 --- a/drivers/i3c/master/dw-i3c-master.c +++ b/drivers/i3c/master/dw-i3c-master.c @@ -232,6 +232,8 @@ #define I3C_BUS_I2C_FMP_TLOW_MIN_NS 500 #define I3C_BUS_THIGH_MAX_NS 41 +#define DW_I3C_HDR_DDR_SPEED 6 + #define XFER_TIMEOUT (msecs_to_jiffies(1000)) #define RPM_AUTOSUSPEND_TIMEOUT 1000 /* ms */ @@ -1017,6 +1019,11 @@ static int dw_i3c_master_i3c_xfers(struct i3c_dev_desc *dev, COMMAND_PORT_DEV_INDEX(data->index) | COMMAND_PORT_ROC; + if (mode == I3C_HDR_DDR) + cmd->cmd_lo |= COMMAND_PORT_CP | + COMMAND_PORT_CMD(I3C_CCC_ENTHDR(0)) | + COMMAND_PORT_SPEED(DW_I3C_HDR_DDR_SPEED); + if (i == (i3c_nxfers - 1)) cmd->cmd_lo |= COMMAND_PORT_TOC; } -- 2.34.1 -- linux-i3c mailing list linux-i3c@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-i3c