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[2001:14ba:a0c3:3a00:264b:feff:fe8b:be8a]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-549ba88332dsm416136e87.181.2025.03.13.23.00.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 Mar 2025 23:00:08 -0700 (PDT) From: Dmitry Baryshkov Date: Fri, 14 Mar 2025 07:59:45 +0200 Subject: [PATCH RFC v4 4/6] drm/display: dp-cec: use new DCPD access helpers Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250314-drm-rework-dpcd-access-v4-4-e86ef6fc6d76@oss.qualcomm.com> References: <20250314-drm-rework-dpcd-access-v4-0-e86ef6fc6d76@oss.qualcomm.com> In-Reply-To: <20250314-drm-rework-dpcd-access-v4-0-e86ef6fc6d76@oss.qualcomm.com> To: Lyude Paul , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Rob Clark , Abhinav Kumar , Sean Paul , Marijn Suijten , Jani Nikula , Alex Deucher , =?utf-8?q?Christian_K=C3=B6nig?= , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Xinliang Liu , Tian Tao , Xinwei Kong , Sumit Semwal , Yongqin Liu , John Stultz Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, Dmitry Baryshkov , Jani Nikula X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=5086; i=dmitry.baryshkov@oss.qualcomm.com; h=from:subject:message-id; bh=d/g0s+1RbkEZsu0cFrspMKQl16Oh0pnUASV91YvLy1M=; b=owGbwMvMwMXYbdNlx6SpcZXxtFoSQ/rlozfjJduPlNmHutiX5RW7N8Y/suDPkal6dvNz+qyIz nkTZ9h0MhqzMDByMciKKbL4FLRMjdmUHPZhx9R6mEGsTCBTGLg4BWAixkc5GKabub47veITs/KC 4jfrnZnmB2g1eZgfuyIgkPL0aVT79GdB9xgPzd/4bx+/z/QOGb1CjuLc2xbdaT3Jv507dVMY50z eYlFlrLBvqki4vr3Djt/CUpLqDN15BxRqNKwVctIS2lXbipn5lNs4W0VWMccqt23t4v737F+4Hg PfiteRmx4samJPcFm64Ijkc6mDfMqOjaf/nvt+71LFO6VfikEKX8NTEpLWxVcq9Nz6cPmcz5dIp x3bTNO2XrGZe8LkbnxSaKXgmYNXtM/NnFWlE2qVf0Ci1yPJ/rCK37FfSzu1+N5rXbNJ1tn56kmO ZLRV2iZX16dfS9eEn+8r2D9/wtQ7b+3cPdYp8G1Mv10BAA== X-Developer-Key: i=dmitry.baryshkov@oss.qualcomm.com; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A X-Proofpoint-ORIG-GUID: DW4VHYZrQL4G32PQVgQuWDZ-nWRDLUcR X-Proofpoint-GUID: DW4VHYZrQL4G32PQVgQuWDZ-nWRDLUcR X-Authority-Analysis: v=2.4 cv=TIhFS0la c=1 sm=1 tr=0 ts=67d3c5ea cx=c_pps a=oc9J++0uMp73DTRD5QyR2A==:117 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=Vs1iUdzkB0EA:10 a=KKAkSRfTAAAA:8 a=20KFwNOVAAAA:8 a=QyXUC8HyAAAA:8 a=Bz2Z_qUYR0Plbu_cxIUA:9 a=QEXdDO2ut3YA:10 a=iYH6xdkBrDN1Jqds4HTS:22 a=cvBusfyB2V15izCimMoJ:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1093,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-03-14_02,2025-03-13_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 adultscore=0 mlxlogscore=999 mlxscore=0 clxscore=1015 bulkscore=0 malwarescore=0 suspectscore=0 spamscore=0 phishscore=0 impostorscore=0 priorityscore=1501 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2502280000 definitions=main-2503140045 From: Dmitry Baryshkov Switch drm_dp_cec.c to use new set of DPCD read / write helpers. Reviewed-by: Lyude Paul Acked-by: Jani Nikula Signed-off-by: Dmitry Baryshkov --- drivers/gpu/drm/display/drm_dp_cec.c | 37 ++++++++++++++++++--------------= ---- 1 file changed, 18 insertions(+), 19 deletions(-) diff --git a/drivers/gpu/drm/display/drm_dp_cec.c b/drivers/gpu/drm/display= /drm_dp_cec.c index 56a4965e518cc237c992a2e31b9f6de05c14766a..ed31471bd0e28826254ecedac48= c5c126729d470 100644 --- a/drivers/gpu/drm/display/drm_dp_cec.c +++ b/drivers/gpu/drm/display/drm_dp_cec.c @@ -96,7 +96,7 @@ static int drm_dp_cec_adap_enable(struct cec_adapter *ada= p, bool enable) u32 val =3D enable ? DP_CEC_TUNNELING_ENABLE : 0; ssize_t err =3D 0; =20 - err =3D drm_dp_dpcd_writeb(aux, DP_CEC_TUNNELING_CONTROL, val); + err =3D drm_dp_dpcd_write_byte(aux, DP_CEC_TUNNELING_CONTROL, val); return (enable && err < 0) ? err : 0; } =20 @@ -112,7 +112,7 @@ static int drm_dp_cec_adap_log_addr(struct cec_adapter = *adap, u8 addr) la_mask |=3D adap->log_addrs.log_addr_mask | (1 << addr); mask[0] =3D la_mask & 0xff; mask[1] =3D la_mask >> 8; - err =3D drm_dp_dpcd_write(aux, DP_CEC_LOGICAL_ADDRESS_MASK, mask, 2); + err =3D drm_dp_dpcd_write_data(aux, DP_CEC_LOGICAL_ADDRESS_MASK, mask, 2); return (addr !=3D CEC_LOG_ADDR_INVALID && err < 0) ? err : 0; } =20 @@ -123,15 +123,14 @@ static int drm_dp_cec_adap_transmit(struct cec_adapte= r *adap, u8 attempts, unsigned int retries =3D min(5, attempts - 1); ssize_t err; =20 - err =3D drm_dp_dpcd_write(aux, DP_CEC_TX_MESSAGE_BUFFER, - msg->msg, msg->len); + err =3D drm_dp_dpcd_write_data(aux, DP_CEC_TX_MESSAGE_BUFFER, + msg->msg, msg->len); if (err < 0) return err; =20 - err =3D drm_dp_dpcd_writeb(aux, DP_CEC_TX_MESSAGE_INFO, - (msg->len - 1) | (retries << 4) | - DP_CEC_TX_MESSAGE_SEND); - return err < 0 ? err : 0; + return drm_dp_dpcd_write_byte(aux, DP_CEC_TX_MESSAGE_INFO, + (msg->len - 1) | (retries << 4) | + DP_CEC_TX_MESSAGE_SEND); } =20 static int drm_dp_cec_adap_monitor_all_enable(struct cec_adapter *adap, @@ -144,13 +143,13 @@ static int drm_dp_cec_adap_monitor_all_enable(struct = cec_adapter *adap, if (!(adap->capabilities & CEC_CAP_MONITOR_ALL)) return 0; =20 - err =3D drm_dp_dpcd_readb(aux, DP_CEC_TUNNELING_CONTROL, &val); - if (err >=3D 0) { + err =3D drm_dp_dpcd_read_byte(aux, DP_CEC_TUNNELING_CONTROL, &val); + if (!err) { if (enable) val |=3D DP_CEC_SNOOPING_ENABLE; else val &=3D ~DP_CEC_SNOOPING_ENABLE; - err =3D drm_dp_dpcd_writeb(aux, DP_CEC_TUNNELING_CONTROL, val); + err =3D drm_dp_dpcd_write_byte(aux, DP_CEC_TUNNELING_CONTROL, val); } return (enable && err < 0) ? err : 0; } @@ -194,7 +193,7 @@ static int drm_dp_cec_received(struct drm_dp_aux *aux) u8 rx_msg_info; ssize_t err; =20 - err =3D drm_dp_dpcd_readb(aux, DP_CEC_RX_MESSAGE_INFO, &rx_msg_info); + err =3D drm_dp_dpcd_read_byte(aux, DP_CEC_RX_MESSAGE_INFO, &rx_msg_info); if (err < 0) return err; =20 @@ -202,7 +201,7 @@ static int drm_dp_cec_received(struct drm_dp_aux *aux) return 0; =20 msg.len =3D (rx_msg_info & DP_CEC_RX_MESSAGE_LEN_MASK) + 1; - err =3D drm_dp_dpcd_read(aux, DP_CEC_RX_MESSAGE_BUFFER, msg.msg, msg.len); + err =3D drm_dp_dpcd_read_data(aux, DP_CEC_RX_MESSAGE_BUFFER, msg.msg, msg= .len); if (err < 0) return err; =20 @@ -215,7 +214,7 @@ static void drm_dp_cec_handle_irq(struct drm_dp_aux *au= x) struct cec_adapter *adap =3D aux->cec.adap; u8 flags; =20 - if (drm_dp_dpcd_readb(aux, DP_CEC_TUNNELING_IRQ_FLAGS, &flags) < 0) + if (drm_dp_dpcd_read_byte(aux, DP_CEC_TUNNELING_IRQ_FLAGS, &flags) < 0) return; =20 if (flags & DP_CEC_RX_MESSAGE_INFO_VALID) @@ -230,7 +229,7 @@ static void drm_dp_cec_handle_irq(struct drm_dp_aux *au= x) (DP_CEC_TX_ADDRESS_NACK_ERROR | DP_CEC_TX_DATA_NACK_ERROR)) cec_transmit_attempt_done(adap, CEC_TX_STATUS_NACK | CEC_TX_STATUS_MAX_RETRIES); - drm_dp_dpcd_writeb(aux, DP_CEC_TUNNELING_IRQ_FLAGS, flags); + drm_dp_dpcd_write_byte(aux, DP_CEC_TUNNELING_IRQ_FLAGS, flags); } =20 /** @@ -253,13 +252,13 @@ void drm_dp_cec_irq(struct drm_dp_aux *aux) if (!aux->cec.adap) goto unlock; =20 - ret =3D drm_dp_dpcd_readb(aux, DP_DEVICE_SERVICE_IRQ_VECTOR_ESI1, - &cec_irq); + ret =3D drm_dp_dpcd_read_byte(aux, DP_DEVICE_SERVICE_IRQ_VECTOR_ESI1, + &cec_irq); if (ret < 0 || !(cec_irq & DP_CEC_IRQ)) goto unlock; =20 drm_dp_cec_handle_irq(aux); - drm_dp_dpcd_writeb(aux, DP_DEVICE_SERVICE_IRQ_VECTOR_ESI1, DP_CEC_IRQ); + drm_dp_dpcd_write_byte(aux, DP_DEVICE_SERVICE_IRQ_VECTOR_ESI1, DP_CEC_IRQ= ); unlock: mutex_unlock(&aux->cec.lock); } @@ -269,7 +268,7 @@ static bool drm_dp_cec_cap(struct drm_dp_aux *aux, u8 *= cec_cap) { u8 cap =3D 0; =20 - if (drm_dp_dpcd_readb(aux, DP_CEC_TUNNELING_CAPABILITY, &cap) !=3D 1 || + if (drm_dp_dpcd_read_byte(aux, DP_CEC_TUNNELING_CAPABILITY, &cap) < 0 || !(cap & DP_CEC_TUNNELING_CAPABLE)) return false; if (cec_cap) --=20 2.39.5