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a=ed25519-sha256; t=1756131418; l=11015; i=yongxing.mou@oss.qualcomm.com; s=20241121; h=from:subject:message-id; bh=Ms2uc9eBMt6jRIp02TopKwtLr/uyJmjCVRkfuIZTXtQ=; b=h8ufd6H57GE2GTZQxc5uTknlNAXt+KTujZ/VrMdaX6xaXi9SluY8sWlKj95Qc/3iy2yBgRvRI QHHj8Jv+T6HA3DQOyRfrX0/ztsNwdRptz2RME6WubLkE9tOgZAA9oEp X-Developer-Key: i=yongxing.mou@oss.qualcomm.com; a=ed25519; pk=zeCnFRUqtOQMeFvdwex2M5o0Yf67UHYfwCyBRQ3kFbU= X-Proofpoint-GUID: 3nIEzzAJ7xIUSSif8fO-WS3LqC6vYD7- X-Proofpoint-ORIG-GUID: 3nIEzzAJ7xIUSSif8fO-WS3LqC6vYD7- X-Authority-Analysis: v=2.4 cv=JJo7s9Kb c=1 sm=1 tr=0 ts=68ac7073 cx=c_pps a=mDZGXZTwRPZaeRUbqKGCBw==:117 a=Uz3yg00KUFJ2y2WijEJ4bw==:17 a=IkcTkHD0fZMA:10 a=2OwXVqhp2XgA:10 a=COk6AnOGAAAA:8 a=EUspDBNiAAAA:8 a=TEiEX4AJ1PTtM9jp4KoA:9 a=QEXdDO2ut3YA:10 a=zc0IvFSfCIW2DFIPzwfm:22 a=TjNXssC_j7lpFel5tvFf:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwODIzMDAzMSBTYWx0ZWRfX8gpjAae1haHx fUYN9KvZsWgrMtoIBlnAmAjqUKj1dJfdxDD2PiCt0pKisqnyIiqBVPYqabwJTOc6bWQ8P1xh57X 182wvby/XJgRVhVOS6PgnqCtFtBAkhRlFhqluXa6Ow8eSyPOLxhdw1ApLBIQdOvvkXLiU5+h0LQ JrGL+En0LqLpMu2DFa1NFyRoyCEPlPF18kJlGnruP+EZCBYgH1jc1SGJy96MEQogLftqZMN5/Rm LZLKcaSrZznlPKtNiNnvCHPR2bsbyJr/EDzigyl9j2sCwNB2IWeidpBpItFscUFXw4vj/6p33sJ 6duQ2pqpZa9VQPSXUAdoesqDdzkwaLsckuTGptldH1KCZXhjHF9uYSWdNM+wO7QIk+wAOrrcV2h gA5wOzmk X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-08-25_06,2025-08-20_03,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 adultscore=0 bulkscore=0 spamscore=0 impostorscore=0 malwarescore=0 clxscore=1015 priorityscore=1501 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2508230031 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Abhinav Kumar dp_display_enable() currently re-trains the link if needed and then enables the pixel clock, programs the controller to start sending the pixel stream. Split these two parts into prepare/enable APIs, to support MST bridges_enable insert the MST payloads funcs between enable stream_clks and program register. Signed-off-by: Abhinav Kumar Signed-off-by: Yongxing Mou --- drivers/gpu/drm/msm/dp/dp_ctrl.c | 51 ++++++++++------ drivers/gpu/drm/msm/dp/dp_ctrl.h | 3 +- drivers/gpu/drm/msm/dp/dp_display.c | 113 ++++++++++++++++++++++++------------ drivers/gpu/drm/msm/dp/dp_display.h | 1 + 4 files changed, 113 insertions(+), 55 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c index 4cf269b98029a55e6cbdfb297587de320019b833..6bfd8faa1e212c3a25964677a4462e7a3a162fa4 100644 --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c @@ -2446,27 +2446,19 @@ static void msm_dp_ctrl_config_msa(struct msm_dp_ctrl_private *ctrl, msm_dp_write_link(ctrl, REG_DP_SOFTWARE_NVID, nvid); } -int msm_dp_ctrl_on_stream(struct msm_dp_ctrl *msm_dp_ctrl, bool force_link_train) +int msm_dp_ctrl_prepare_stream_on(struct msm_dp_ctrl *msm_dp_ctrl, bool force_link_train) { int ret = 0; - bool mainlink_ready = false; struct msm_dp_ctrl_private *ctrl; - unsigned long pixel_rate; - unsigned long pixel_rate_orig; if (!msm_dp_ctrl) return -EINVAL; ctrl = container_of(msm_dp_ctrl, struct msm_dp_ctrl_private, msm_dp_ctrl); - pixel_rate = pixel_rate_orig = ctrl->panel->msm_dp_mode.drm_mode.clock; - - if (msm_dp_ctrl->wide_bus_en || ctrl->panel->msm_dp_mode.out_fmt_is_yuv_420) - pixel_rate >>= 1; - - drm_dbg_dp(ctrl->drm_dev, "rate=%d, num_lanes=%d, pixel_rate=%lu\n", + drm_dbg_dp(ctrl->drm_dev, "rate=%d, num_lanes=%d\n", ctrl->link->link_params.rate, - ctrl->link->link_params.num_lanes, pixel_rate); + ctrl->link->link_params.num_lanes); drm_dbg_dp(ctrl->drm_dev, "core_clk_on=%d link_clk_on=%d stream_clk_on=%d\n", @@ -2476,10 +2468,39 @@ int msm_dp_ctrl_on_stream(struct msm_dp_ctrl *msm_dp_ctrl, bool force_link_train ret = msm_dp_ctrl_enable_mainlink_clocks(ctrl); if (ret) { DRM_ERROR("Failed to start link clocks. ret=%d\n", ret); - goto end; + return ret; } } + if (force_link_train || !msm_dp_ctrl_channel_eq_ok(ctrl)) + msm_dp_ctrl_link_retrain(ctrl); + + /* stop txing train pattern to end link training */ + msm_dp_ctrl_clear_training_pattern(ctrl, DP_PHY_DPRX); + + return ret; +} + +int msm_dp_ctrl_on_stream(struct msm_dp_ctrl *msm_dp_ctrl) +{ + int ret = 0; + bool mainlink_ready = false; + struct msm_dp_ctrl_private *ctrl; + unsigned long pixel_rate; + unsigned long pixel_rate_orig; + + if (!msm_dp_ctrl) + return -EINVAL; + + ctrl = container_of(msm_dp_ctrl, struct msm_dp_ctrl_private, msm_dp_ctrl); + + pixel_rate = pixel_rate_orig = ctrl->panel->msm_dp_mode.drm_mode.clock; + + if (msm_dp_ctrl->wide_bus_en || ctrl->panel->msm_dp_mode.out_fmt_is_yuv_420) + pixel_rate >>= 1; + + drm_dbg_dp(ctrl->drm_dev, "pixel_rate=%lu\n", pixel_rate); + ret = clk_set_rate(ctrl->pixel_clk, pixel_rate * 1000); if (ret) { DRM_ERROR("Failed to set pixel clock rate. ret=%d\n", ret); @@ -2497,12 +2518,6 @@ int msm_dp_ctrl_on_stream(struct msm_dp_ctrl *msm_dp_ctrl, bool force_link_train ctrl->stream_clks_on = true; } - if (force_link_train || !msm_dp_ctrl_channel_eq_ok(ctrl)) - msm_dp_ctrl_link_retrain(ctrl); - - /* stop txing train pattern to end link training */ - msm_dp_ctrl_clear_training_pattern(ctrl, DP_PHY_DPRX); - /* * Set up transfer unit values and set controller state to send * video. diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.h b/drivers/gpu/drm/msm/dp/dp_ctrl.h index f68bee62713f1650354b37edb8e1d76134d8d395..1497f1a8fc2f00991356663c19c87eb9fad48a73 100644 --- a/drivers/gpu/drm/msm/dp/dp_ctrl.h +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.h @@ -17,7 +17,8 @@ struct msm_dp_ctrl { struct phy; int msm_dp_ctrl_on_link(struct msm_dp_ctrl *msm_dp_ctrl); -int msm_dp_ctrl_on_stream(struct msm_dp_ctrl *msm_dp_ctrl, bool force_link_train); +int msm_dp_ctrl_on_stream(struct msm_dp_ctrl *msm_dp_ctrl); +int msm_dp_ctrl_prepare_stream_on(struct msm_dp_ctrl *msm_dp_ctrl, bool force_link_train); void msm_dp_ctrl_off_link_stream(struct msm_dp_ctrl *msm_dp_ctrl); void msm_dp_ctrl_off(struct msm_dp_ctrl *msm_dp_ctrl); void msm_dp_ctrl_push_idle(struct msm_dp_ctrl *msm_dp_ctrl); diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 632a1191e4e48fecd7dbda2f6ec6b8ed0aeebc93..36a12150925246b168acbabf77d1206a1ef8eff5 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -674,7 +674,42 @@ static int msm_dp_display_set_mode(struct msm_dp *msm_dp_display, return 0; } -static int msm_dp_display_enable(struct msm_dp_display_private *dp, bool force_link_train) +static int msm_dp_display_prepare(struct msm_dp_display_private *dp) +{ + int rc = 0; + struct msm_dp *msm_dp_display = &dp->msm_dp_display; + bool force_link_train = false; + + drm_dbg_dp(dp->drm_dev, "sink_count=%d\n", dp->link->sink_count); + + rc = pm_runtime_resume_and_get(&msm_dp_display->pdev->dev); + if (rc) { + DRM_ERROR("failed to pm_runtime_resume\n"); + return rc; + } + + if (dp->link->sink_count == 0) + return rc; + + if (msm_dp_display->link_ready && !msm_dp_display->power_on) { + msm_dp_display_host_phy_init(dp); + force_link_train = true; + } + + rc = msm_dp_ctrl_on_link(dp->ctrl); + if (rc) { + DRM_ERROR("Failed link training (rc=%d)\n", rc); + msm_dp_display->connector->state->link_status = DRM_LINK_STATUS_BAD; + } + + rc = msm_dp_ctrl_prepare_stream_on(dp->ctrl, force_link_train); + if (!rc) + msm_dp_display->prepared = true; + + return rc; +} + +static int msm_dp_display_enable(struct msm_dp_display_private *dp) { int rc = 0; struct msm_dp *msm_dp_display = &dp->msm_dp_display; @@ -685,7 +720,7 @@ static int msm_dp_display_enable(struct msm_dp_display_private *dp, bool force_l return 0; } - rc = msm_dp_ctrl_on_stream(dp->ctrl, force_link_train); + rc = msm_dp_ctrl_on_stream(dp->ctrl); if (!rc) msm_dp_display->power_on = true; @@ -715,13 +750,10 @@ static int msm_dp_display_post_enable(struct msm_dp *msm_dp_display) return 0; } -static int msm_dp_display_disable(struct msm_dp_display_private *dp) +static void msm_dp_display_audio_notify_disable(struct msm_dp_display_private *dp) { struct msm_dp *msm_dp_display = &dp->msm_dp_display; - if (!msm_dp_display->power_on) - return 0; - /* wait only if audio was enabled */ if (msm_dp_display->audio_enabled) { /* signal the disconnect event */ @@ -732,6 +764,14 @@ static int msm_dp_display_disable(struct msm_dp_display_private *dp) } msm_dp_display->audio_enabled = false; +} + +static int msm_dp_display_disable(struct msm_dp_display_private *dp) +{ + struct msm_dp *msm_dp_display = &dp->msm_dp_display; + + if (!msm_dp_display->power_on) + return 0; if (dp->link->sink_count == 0) { /* @@ -1395,44 +1435,34 @@ void msm_dp_bridge_atomic_enable(struct drm_bridge *drm_bridge, struct drm_atomic_state *state) { struct msm_dp_bridge *msm_dp_bridge = to_dp_bridge(drm_bridge); - struct msm_dp *dp = msm_dp_bridge->msm_dp_display; + struct msm_dp *msm_dp_display = msm_dp_bridge->msm_dp_display; int rc = 0; - struct msm_dp_display_private *msm_dp_display; - bool force_link_train = false; - - msm_dp_display = container_of(dp, struct msm_dp_display_private, msm_dp_display); - - if (dp->is_edp) - msm_dp_hpd_plug_handle(msm_dp_display, 0); - - if (pm_runtime_resume_and_get(&dp->pdev->dev)) { - DRM_ERROR("failed to pm_runtime_resume\n"); - return; - } + struct msm_dp_display_private *dp; - if (msm_dp_display->link->sink_count == 0) - return; + dp = container_of(msm_dp_display, struct msm_dp_display_private, msm_dp_display); - if (dp->link_ready && !dp->power_on) { - msm_dp_display_host_phy_init(msm_dp_display); - force_link_train = true; - } + if (msm_dp_display->is_edp) + msm_dp_hpd_plug_handle(dp, 0); - rc = msm_dp_ctrl_on_link(msm_dp_display->ctrl); + rc = msm_dp_display_prepare(dp); if (rc) { - DRM_ERROR("Failed link training (rc=%d)\n", rc); - dp->connector->state->link_status = DRM_LINK_STATUS_BAD; + DRM_ERROR("DP display prepare failed, rc=%d\n", rc); + return; } - msm_dp_display_enable(msm_dp_display, force_link_train); + if (msm_dp_display->prepared) { + rc = msm_dp_display_enable(dp); + if (rc) + DRM_ERROR("DP display enable failed, rc=%d\n", rc); - rc = msm_dp_display_post_enable(dp); - if (rc) { - DRM_ERROR("DP display post enable failed, rc=%d\n", rc); - msm_dp_display_disable(msm_dp_display); + rc = msm_dp_display_post_enable(msm_dp_display); + if (rc) { + DRM_ERROR("DP display post enable failed, rc=%d\n", rc); + msm_dp_display_disable(dp); + } } - drm_dbg_dp(dp->drm_dev, "type=%d Done\n", dp->connector_type); + drm_dbg_dp(msm_dp_display->drm_dev, "type=%d Done\n", msm_dp_display->connector_type); } void msm_dp_bridge_atomic_disable(struct drm_bridge *drm_bridge, @@ -1447,6 +1477,15 @@ void msm_dp_bridge_atomic_disable(struct drm_bridge *drm_bridge, msm_dp_ctrl_push_idle(msm_dp_display->ctrl); } +static void msm_dp_display_unprepare(struct msm_dp_display_private *dp) +{ + struct msm_dp *msm_dp_display = &dp->msm_dp_display; + + pm_runtime_put_sync(&msm_dp_display->pdev->dev); + + msm_dp_display->prepared = false; +} + void msm_dp_bridge_atomic_post_disable(struct drm_bridge *drm_bridge, struct drm_atomic_state *state) { @@ -1462,11 +1501,13 @@ void msm_dp_bridge_atomic_post_disable(struct drm_bridge *drm_bridge, if (!dp->link_ready) drm_dbg_dp(dp->drm_dev, "type=%d is disconnected\n", dp->connector_type); + msm_dp_display_audio_notify_disable(msm_dp_display); + msm_dp_display_disable(msm_dp_display); - drm_dbg_dp(dp->drm_dev, "type=%d Done\n", dp->connector_type); + msm_dp_display_unprepare(msm_dp_display); - pm_runtime_put_sync(&dp->pdev->dev); + drm_dbg_dp(dp->drm_dev, "type=%d Done\n", dp->connector_type); } void msm_dp_bridge_mode_set(struct drm_bridge *drm_bridge, diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h index 60094061c1029bc7a06ffaa80d9403b40aa07eb1..2fbf16f27842bb7639efaa2baecac7bdf8908432 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.h +++ b/drivers/gpu/drm/msm/dp/dp_display.h @@ -20,6 +20,7 @@ struct msm_dp { bool link_ready; bool audio_enabled; bool power_on; + bool prepared; unsigned int connector_type; bool is_edp; bool internal_hpd; -- 2.34.1