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[129.46.232.65]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-8ac84cb135fsm19223386d6.38.2026.04.10.02.33.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 10 Apr 2026 02:33:58 -0700 (PDT) From: Yongxing Mou Date: Fri, 10 Apr 2026 17:33:36 +0800 Subject: [PATCH v4 01/39] drm/msm/dp: remove cached drm_edid from panel 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: 7bit Message-Id: <20260410-msm-dp-mst-v4-1-b20518dea8de@oss.qualcomm.com> References: <20260410-msm-dp-mst-v4-0-b20518dea8de@oss.qualcomm.com> In-Reply-To: <20260410-msm-dp-mst-v4-0-b20518dea8de@oss.qualcomm.com> To: Rob Clark , Dmitry Baryshkov , Abhinav Kumar , Sean Paul , Marijn Suijten , David Airlie , Simona Vetter , Jessica Zhang Cc: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org, Yongxing Mou X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1775813628; l=8935; i=yongxing.mou@oss.qualcomm.com; s=20250910; h=from:subject:message-id; bh=uZfqkKsyUuvhDJEMiuMHtPECSA2HOV7I6DmlDJNOZKU=; b=91kwcb+pVceGCT+BXif9ewyCmuomE5R+Bm5lwh4dd2WTN7KEd7DlCtm9Ac15c9VpVBlx+gesc wEG1PwqTFUYDj6HOpApvzyXIl515UCuMeD4AC8b17kAUZP+hXy3msM7 X-Developer-Key: i=yongxing.mou@oss.qualcomm.com; a=ed25519; pk=rAy5J1eP+V7OXqH5FJ7ngMCtUrnHhut30ZTldOj52UM= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDEwMDA4OCBTYWx0ZWRfX21SSptpLlvVy 2XqPDokZxrpgID5sFBfryk36PWUgugYVHtnXQvSivTN7I6gct0U8T+AQuOw446kt0Ydmb85jH/V HHgahj7VnhDAm8+Gi28ikCiYVCLgTgur4pTF3WJ3gQiJfUHw9LkrUKumQ6JDFc6CeSkk8l2ydAo oiyw0g0byYnfwl4nn5IFik5C6jqqBzrXeNhlo42N6NS9Z16p08XbVb3JYNCnclYWvQJAlRyUrOS BM2kDfciy1JyJqVOCoPEYwpdXbxtIo/KbMFXrDlHYSn56vQYu/EhbcAUGZd+1czbHJFSha7v9D/ VbmUItusQyaBCA8GRC2nt0H3lX/1Set8RHA9yLDXEyialpK1ZIDNkgdb7LJi1j8FYa9x2OzPGMv 0FEGZxGcQPsBLCshpyTGO84wQ3eXlRkiO4BmDjk3gJWijf1QDSBZ2G5B1LigiMZQLp+07K7fdbe jDqkol7dWXLAUPGwDuw== X-Authority-Analysis: v=2.4 cv=eOcjSnp1 c=1 sm=1 tr=0 ts=69d8c407 cx=c_pps a=7E5Bxpl4vBhpaufnMqZlrw==:117 a=C3Dk8TwHQYyIj7nOf9RCJw==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=gowsoOTTUOVcmtlkKump:22 a=EUspDBNiAAAA:8 a=Jn5Zs6sXaE638rALQFgA:9 a=QEXdDO2ut3YA:10 a=pJ04lnu7RYOZP9TFuWaZ:22 X-Proofpoint-GUID: 4ek0MD9ynwNSKuMfT107GBInj7PKuin0 X-Proofpoint-ORIG-GUID: 4ek0MD9ynwNSKuMfT107GBInj7PKuin0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-10_03,2026-04-09_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 adultscore=0 bulkscore=0 suspectscore=0 phishscore=0 impostorscore=0 lowpriorityscore=0 clxscore=1015 priorityscore=1501 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604010000 definitions=main-2604100088 The cached drm_edid seems unnecessary here. Use the drm_edid pointer directly in the plug stage instead of caching it. Remove the cached drm_edid and the corresponding oneliner to simplify the code. Signed-off-by: Yongxing Mou --- drivers/gpu/drm/msm/dp/dp_display.c | 27 +++++++++++------- drivers/gpu/drm/msm/dp/dp_panel.c | 57 ++++--------------------------------- drivers/gpu/drm/msm/dp/dp_panel.h | 13 +++------ 3 files changed, 26 insertions(+), 71 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 5c6a24ec140d..e28cc1bbb5b1 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -268,6 +268,7 @@ static int msm_dp_display_process_hpd_high(struct msm_dp_display_private *dp) const struct drm_display_info *info = &connector->display_info; int rc = 0; u8 dpcd[DP_RECEIVER_CAP_SIZE]; + const struct drm_edid *drm_edid; rc = drm_dp_read_dpcd_caps(dp->aux, dpcd); if (rc) @@ -275,10 +276,20 @@ static int msm_dp_display_process_hpd_high(struct msm_dp_display_private *dp) dp->link->lttpr_count = msm_dp_display_lttpr_init(dp, dpcd); - rc = msm_dp_panel_read_sink_caps(dp->panel, connector); + rc = msm_dp_panel_read_link_caps(dp->panel, connector); if (rc) goto end; + drm_edid = drm_edid_read_ddc(connector, &dp->aux->ddc); + drm_edid_connector_update(connector, drm_edid); + + if (!drm_edid) { + DRM_ERROR("panel edid read failed\n"); + /* check edid read fail is due to unplug */ + if (!msm_dp_aux_is_link_connected(dp->aux)) + return -ETIMEDOUT; + } + msm_dp_link_process_request(dp->link); if (!dp->msm_dp_display.is_edp) @@ -290,7 +301,7 @@ static int msm_dp_display_process_hpd_high(struct msm_dp_display_private *dp) dp->msm_dp_display.psr_supported = dp->panel->psr_cap.version && psr_enabled; dp->audio_supported = info->has_audio; - msm_dp_panel_handle_sink_request(dp->panel); + msm_dp_panel_handle_sink_request(dp->panel, drm_edid); /* * set sink to normal operation mode -- D0 @@ -449,7 +460,7 @@ static int msm_dp_hpd_unplug_handle(struct msm_dp_display_private *dp) /* Don't forget modes for eDP */ if (!dp->msm_dp_display.is_edp) - msm_dp_panel_unplugged(dp->panel, dp->msm_dp_display.connector); + drm_edid_connector_update(dp->msm_dp_display.connector, NULL); /* triggered by irq_hdp with sink_count = 0 */ if (dp->link->sink_count == 0) @@ -512,7 +523,6 @@ static int msm_dp_irq_hpd_handle(struct msm_dp_display_private *dp) static void msm_dp_display_deinit_sub_modules(struct msm_dp_display_private *dp) { msm_dp_audio_put(dp->audio); - msm_dp_panel_put(dp->panel); msm_dp_aux_put(dp->aux); } @@ -563,7 +573,7 @@ static int msm_dp_init_sub_modules(struct msm_dp_display_private *dp) rc = PTR_ERR(dp->ctrl); DRM_ERROR("failed to initialize ctrl, rc = %d\n", rc); dp->ctrl = NULL; - goto error_ctrl; + goto error_link; } dp->audio = msm_dp_audio_get(dp->msm_dp_display.pdev, dp->link_base); @@ -571,13 +581,11 @@ static int msm_dp_init_sub_modules(struct msm_dp_display_private *dp) rc = PTR_ERR(dp->audio); pr_err("failed to initialize audio, rc = %d\n", rc); dp->audio = NULL; - goto error_ctrl; + goto error_link; } return rc; -error_ctrl: - msm_dp_panel_put(dp->panel); error_link: msm_dp_aux_put(dp->aux); error: @@ -741,8 +749,7 @@ int msm_dp_display_get_modes(struct msm_dp *dp) msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display); - return msm_dp_panel_get_modes(msm_dp_display->panel, - dp->connector); + return drm_edid_connector_add_modes(msm_dp_display->panel->connector); } bool msm_dp_display_check_video_test(struct msm_dp *dp) diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c b/drivers/gpu/drm/msm/dp/dp_panel.c index 6bb021820d7c..bde4a772d22c 100644 --- a/drivers/gpu/drm/msm/dp/dp_panel.c +++ b/drivers/gpu/drm/msm/dp/dp_panel.c @@ -232,8 +232,8 @@ static u32 msm_dp_panel_get_supported_bpp(struct msm_dp_panel *msm_dp_panel, return min_supported_bpp; } -int msm_dp_panel_read_sink_caps(struct msm_dp_panel *msm_dp_panel, - struct drm_connector *connector) +int msm_dp_panel_read_link_caps(struct msm_dp_panel *msm_dp_panel, + struct drm_connector *connector) { int rc, bw_code; int count; @@ -271,36 +271,9 @@ int msm_dp_panel_read_sink_caps(struct msm_dp_panel *msm_dp_panel, rc = drm_dp_read_downstream_info(panel->aux, msm_dp_panel->dpcd, msm_dp_panel->downstream_ports); - if (rc) - return rc; - - drm_edid_free(msm_dp_panel->drm_edid); - - msm_dp_panel->drm_edid = drm_edid_read_ddc(connector, &panel->aux->ddc); - - drm_edid_connector_update(connector, msm_dp_panel->drm_edid); - - if (!msm_dp_panel->drm_edid) { - DRM_ERROR("panel edid read failed\n"); - /* check edid read fail is due to unplug */ - if (!msm_dp_aux_is_link_connected(panel->aux)) { - rc = -ETIMEDOUT; - goto end; - } - } - -end: return rc; } -void msm_dp_panel_unplugged(struct msm_dp_panel *msm_dp_panel, - struct drm_connector *connector) -{ - drm_edid_connector_update(connector, NULL); - drm_edid_free(msm_dp_panel->drm_edid); - msm_dp_panel->drm_edid = NULL; -} - u32 msm_dp_panel_get_mode_bpp(struct msm_dp_panel *msm_dp_panel, u32 mode_edid_bpp, u32 mode_pclk_khz) { @@ -324,20 +297,6 @@ u32 msm_dp_panel_get_mode_bpp(struct msm_dp_panel *msm_dp_panel, return bpp; } -int msm_dp_panel_get_modes(struct msm_dp_panel *msm_dp_panel, - struct drm_connector *connector) -{ - if (!msm_dp_panel) { - DRM_ERROR("invalid input\n"); - return -EINVAL; - } - - if (msm_dp_panel->drm_edid) - return drm_edid_connector_add_modes(connector); - - return 0; -} - static u8 msm_dp_panel_get_edid_checksum(const struct edid *edid) { edid += edid->extensions; @@ -345,7 +304,8 @@ static u8 msm_dp_panel_get_edid_checksum(const struct edid *edid) return edid->checksum; } -void msm_dp_panel_handle_sink_request(struct msm_dp_panel *msm_dp_panel) +void msm_dp_panel_handle_sink_request(struct msm_dp_panel *msm_dp_panel, + const struct drm_edid *drm_edid) { struct msm_dp_panel_private *panel; @@ -358,7 +318,7 @@ void msm_dp_panel_handle_sink_request(struct msm_dp_panel *msm_dp_panel) if (panel->link->sink_request & DP_TEST_LINK_EDID_READ) { /* FIXME: get rid of drm_edid_raw() */ - const struct edid *edid = drm_edid_raw(msm_dp_panel->drm_edid); + const struct edid *edid = drm_edid_raw(drm_edid); u8 checksum; if (edid) @@ -755,10 +715,3 @@ struct msm_dp_panel *msm_dp_panel_get(struct device *dev, struct drm_dp_aux *aux return msm_dp_panel; } -void msm_dp_panel_put(struct msm_dp_panel *msm_dp_panel) -{ - if (!msm_dp_panel) - return; - - drm_edid_free(msm_dp_panel->drm_edid); -} diff --git a/drivers/gpu/drm/msm/dp/dp_panel.h b/drivers/gpu/drm/msm/dp/dp_panel.h index 9173e90a5053..53b7b4463551 100644 --- a/drivers/gpu/drm/msm/dp/dp_panel.h +++ b/drivers/gpu/drm/msm/dp/dp_panel.h @@ -33,7 +33,6 @@ struct msm_dp_panel { u8 downstream_ports[DP_MAX_DOWNSTREAM_PORTS]; struct msm_dp_link_info link_info; - const struct drm_edid *drm_edid; struct drm_connector *connector; struct msm_dp_display_mode msm_dp_mode; struct msm_dp_panel_psr psr_cap; @@ -47,15 +46,12 @@ struct msm_dp_panel { int msm_dp_panel_init_panel_info(struct msm_dp_panel *msm_dp_panel); int msm_dp_panel_deinit(struct msm_dp_panel *msm_dp_panel); int msm_dp_panel_timing_cfg(struct msm_dp_panel *msm_dp_panel, bool wide_bus_en); -int msm_dp_panel_read_sink_caps(struct msm_dp_panel *msm_dp_panel, - struct drm_connector *connector); -void msm_dp_panel_unplugged(struct msm_dp_panel *msm_dp_panel, - struct drm_connector *connector); +int msm_dp_panel_read_link_caps(struct msm_dp_panel *msm_dp_panel, + struct drm_connector *connector); u32 msm_dp_panel_get_mode_bpp(struct msm_dp_panel *msm_dp_panel, u32 mode_max_bpp, u32 mode_pclk_khz); -int msm_dp_panel_get_modes(struct msm_dp_panel *msm_dp_panel, - struct drm_connector *connector); -void msm_dp_panel_handle_sink_request(struct msm_dp_panel *msm_dp_panel); +void msm_dp_panel_handle_sink_request(struct msm_dp_panel *msm_dp_panel, + const struct drm_edid *drm_edid); void msm_dp_panel_tpg_config(struct msm_dp_panel *msm_dp_panel, bool enable); void msm_dp_panel_clear_dsc_dto(struct msm_dp_panel *msm_dp_panel); @@ -94,5 +90,4 @@ struct msm_dp_panel *msm_dp_panel_get(struct device *dev, struct drm_dp_aux *aux struct msm_dp_link *link, void __iomem *link_base, void __iomem *p0_base); -void msm_dp_panel_put(struct msm_dp_panel *msm_dp_panel); #endif /* _DP_PANEL_H_ */ -- 2.43.0