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[2001:14ba:a0c3:3a00:264b:feff:fe8b:be8a]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-549ba88332dsm416136e87.181.2025.03.13.23.00.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 Mar 2025 23:00:14 -0700 (PDT) From: Dmitry Baryshkov Date: Fri, 14 Mar 2025 07:59:47 +0200 Subject: [PATCH RFC v4 6/6] drm/display: dp-tunnel: 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-v4-6-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=4082; i=dmitry.baryshkov@oss.qualcomm.com; h=from:subject:message-id; bh=AezDpTs9i2rYRC6AeDwZvqAV87zlWZZG2GdTd51PPFs=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBn08XZFN6uPDdiX1R7XmfB1vXISASqSFYGN569O I6KV6qdI3WJATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCZ9PF2QAKCRCLPIo+Aiko 1eM5B/9jhOE9nI9V6mDRKubJu0/SPcbZoi/lHs71XyG/da3UMGC32Qt16u66xFuLg4inRbB79MC lZllWHwPgl1Q5/YeMrd7mbZ4SMoiH9evqV5y0/FTvifqU6zwgcpJ6ZCMWGixnm3Ezlb0aiz5nI9 XYnzCZ3lNXvh8AkwMZMgXNfGOA71gEm/MhhXwmgqXHN48nVlgfkYc1J84RrrNot9sLmiQgfQHzR F4KZYvVt5YGhuR97yx5BeXuJOeT2S6L6rAfmV5RybP6JJdi6id/B10zo5H3f/e3tm+QFyIddeuv fYEScrVe2IVsan3JCnn6Al2YeCZugz0rJLJveu4Idywf2rlt X-Developer-Key: i=dmitry.baryshkov@oss.qualcomm.com; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A X-Authority-Analysis: v=2.4 cv=PtWTbxM3 c=1 sm=1 tr=0 ts=67d3c5f2 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=VzZmvmfVK_LU_xpdqU4A:9 a=QEXdDO2ut3YA:10 a=iYH6xdkBrDN1Jqds4HTS:22 a=cvBusfyB2V15izCimMoJ:22 X-Proofpoint-GUID: O0IZLgAIxoIMlqn2ctTKMS9gqkoDmB1U X-Proofpoint-ORIG-GUID: O0IZLgAIxoIMlqn2ctTKMS9gqkoDmB1U 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 priorityscore=1501 lowpriorityscore=0 mlxscore=0 mlxlogscore=999 impostorscore=0 spamscore=0 adultscore=0 phishscore=0 bulkscore=0 clxscore=1015 malwarescore=0 suspectscore=0 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_tunnel.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_tunnel.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/display/drm_dp_tunnel.c b/drivers/gpu/drm/disp= lay/drm_dp_tunnel.c index 90fe07a89260e21e78f2db7f57a90602be921a11..076edf1610480275c62395334ab= 0536befa42f15 100644 --- a/drivers/gpu/drm/display/drm_dp_tunnel.c +++ b/drivers/gpu/drm/display/drm_dp_tunnel.c @@ -222,7 +222,7 @@ static int read_tunnel_regs(struct drm_dp_aux *aux, str= uct drm_dp_tunnel_regs *r while ((len =3D next_reg_area(&offset))) { int address =3D DP_TUNNELING_BASE + offset; =20 - if (drm_dp_dpcd_read(aux, address, tunnel_reg_ptr(regs, address), len) <= 0) + if (drm_dp_dpcd_read_data(aux, address, tunnel_reg_ptr(regs, address), l= en) < 0) return -EIO; =20 offset +=3D len; @@ -913,7 +913,7 @@ static int set_bw_alloc_mode(struct drm_dp_tunnel *tunn= el, bool enable) u8 mask =3D DP_DISPLAY_DRIVER_BW_ALLOCATION_MODE_ENABLE | DP_UNMASK_BW_AL= LOCATION_IRQ; u8 val; =20 - if (drm_dp_dpcd_readb(tunnel->aux, DP_DPTX_BW_ALLOCATION_MODE_CONTROL, &v= al) < 0) + if (drm_dp_dpcd_read_byte(tunnel->aux, DP_DPTX_BW_ALLOCATION_MODE_CONTROL= , &val) < 0) goto out_err; =20 if (enable) @@ -921,7 +921,7 @@ static int set_bw_alloc_mode(struct drm_dp_tunnel *tunn= el, bool enable) else val &=3D ~mask; =20 - if (drm_dp_dpcd_writeb(tunnel->aux, DP_DPTX_BW_ALLOCATION_MODE_CONTROL, v= al) < 0) + if (drm_dp_dpcd_write_byte(tunnel->aux, DP_DPTX_BW_ALLOCATION_MODE_CONTRO= L, val) < 0) goto out_err; =20 tunnel->bw_alloc_enabled =3D enable; @@ -1039,7 +1039,7 @@ static int clear_bw_req_state(struct drm_dp_aux *aux) { u8 bw_req_mask =3D DP_BW_REQUEST_SUCCEEDED | DP_BW_REQUEST_FAILED; =20 - if (drm_dp_dpcd_writeb(aux, DP_TUNNELING_STATUS, bw_req_mask) < 0) + if (drm_dp_dpcd_write_byte(aux, DP_TUNNELING_STATUS, bw_req_mask) < 0) return -EIO; =20 return 0; @@ -1052,7 +1052,7 @@ static int bw_req_complete(struct drm_dp_aux *aux, bo= ol *status_changed) u8 val; int err; =20 - if (drm_dp_dpcd_readb(aux, DP_TUNNELING_STATUS, &val) < 0) + if (drm_dp_dpcd_read_byte(aux, DP_TUNNELING_STATUS, &val) < 0) return -EIO; =20 *status_changed =3D val & status_change_mask; @@ -1095,7 +1095,7 @@ static int allocate_tunnel_bw(struct drm_dp_tunnel *t= unnel, int bw) if (err) goto out; =20 - if (drm_dp_dpcd_writeb(tunnel->aux, DP_REQUEST_BW, request_bw) < 0) { + if (drm_dp_dpcd_write_byte(tunnel->aux, DP_REQUEST_BW, request_bw) < 0) { err =3D -EIO; goto out; } @@ -1196,13 +1196,13 @@ static int check_and_clear_status_change(struct drm= _dp_tunnel *tunnel) u8 mask =3D DP_BW_ALLOCATION_CAPABILITY_CHANGED | DP_ESTIMATED_BW_CHANGED; u8 val; =20 - if (drm_dp_dpcd_readb(tunnel->aux, DP_TUNNELING_STATUS, &val) < 0) + if (drm_dp_dpcd_read_byte(tunnel->aux, DP_TUNNELING_STATUS, &val) < 0) goto out_err; =20 val &=3D mask; =20 if (val) { - if (drm_dp_dpcd_writeb(tunnel->aux, DP_TUNNELING_STATUS, val) < 0) + if (drm_dp_dpcd_write_byte(tunnel->aux, DP_TUNNELING_STATUS, val) < 0) goto out_err; =20 return 1; @@ -1215,7 +1215,7 @@ static int check_and_clear_status_change(struct drm_d= p_tunnel *tunnel) * Check for estimated BW changes explicitly to account for lost * BW change notifications. */ - if (drm_dp_dpcd_readb(tunnel->aux, DP_ESTIMATED_BW, &val) < 0) + if (drm_dp_dpcd_read_byte(tunnel->aux, DP_ESTIMATED_BW, &val) < 0) goto out_err; =20 if (val * tunnel->bw_granularity !=3D tunnel->estimated_bw) @@ -1300,7 +1300,7 @@ int drm_dp_tunnel_handle_irq(struct drm_dp_tunnel_mgr= *mgr, struct drm_dp_aux *a { u8 val; =20 - if (drm_dp_dpcd_readb(aux, DP_TUNNELING_STATUS, &val) < 0) + if (drm_dp_dpcd_read_byte(aux, DP_TUNNELING_STATUS, &val) < 0) return -EIO; =20 if (val & (DP_BW_REQUEST_SUCCEEDED | DP_BW_REQUEST_FAILED)) --=20 2.39.5