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Fri, 6 Dec 2024 04:32:44 GMT Received: from abhinavk-linux1.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Thu, 5 Dec 2024 20:32:43 -0800 From: Abhinav Kumar Date: Thu, 5 Dec 2024 20:32:05 -0800 Subject: [PATCH 34/45] drm/msm/dp: add support to re-use and clear the panel edid Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <20241205-dp_mst-v1-34-f8618d42a99a@quicinc.com> References: <20241205-dp_mst-v1-0-f8618d42a99a@quicinc.com> In-Reply-To: <20241205-dp_mst-v1-0-f8618d42a99a@quicinc.com> To: Rob Clark , Dmitry Baryshkov , Sean Paul , Marijn Suijten , David Airlie , "Simona Vetter" , Stephen Boyd , "Chandan Uddaraju" , Guenter Roeck , Kuogee Hsieh , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley CC: Vara Reddy , Rob Clark , Tanmay Shah , , , , , , Jessica Zhang , Laurent Pinchart , Abhinav Kumar X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1733459543; l=3144; i=quic_abhinavk@quicinc.com; s=20240509; h=from:subject:message-id; bh=Duteyo4dprnKFdoQfs41gAv1uMhk2yO4HwSHbTQpa7I=; b=LNr86Ohre93aRS54RJGHZLUurk9G2lBm3vx/D3bPwJKkBM8sSikF8K1Ov9+xLV3k3vQKUBOfu 9S8hblV1L8fAR2zzxHESzSBkhXHqigkWe1jU3CPyNnZzdFVQ1tSShjz X-Developer-Key: i=quic_abhinavk@quicinc.com; a=ed25519; pk=SD3D8dOKDDh6BoX3jEYjsHrTFwuIK8+o0cLPgQok9ys= X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: ZUdApP4mgfjxlo-6QdpilWKLpNb-dIKw X-Proofpoint-ORIG-GUID: ZUdApP4mgfjxlo-6QdpilWKLpNb-dIKw X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-06_09,2024-09-06_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 phishscore=0 spamscore=0 bulkscore=0 priorityscore=1501 mlxscore=0 impostorscore=0 suspectscore=0 adultscore=0 malwarescore=0 clxscore=1015 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2412060030 During certain cases, the dp mst connector's panel edid can be re-used such as getting multiple get_modes() without irq_hpd and should be cleared in cases when the connector is destroyed or when irq hpd is received. Add support to handle these cases for the mst_connector's panel edid. Signed-off-by: Abhinav Kumar --- drivers/gpu/drm/msm/dp/dp_mst_drm.c | 39 +++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/drivers/gpu/drm/msm/dp/dp_mst_drm.c b/drivers/gpu/drm/msm/dp/dp_mst_drm.c index 2d92084586b466d4953429e8a6fbf766d081cb9f..15c61fd37c418889074222c0f576778adadf51c9 100644 --- a/drivers/gpu/drm/msm/dp/dp_mst_drm.c +++ b/drivers/gpu/drm/msm/dp/dp_mst_drm.c @@ -559,6 +559,34 @@ static struct msm_dp_mst_bridge_state *msm_dp_mst_br_priv_state(struct drm_atomi &bridge->obj)); } +static void msm_dp_mst_clear_panel_edid(struct msm_dp *dp_display) +{ + struct msm_dp_mst *mst = dp_display->msm_dp_mst; + struct msm_dp_mst_connector *mst_conn; + struct msm_dp_panel *dp_panel; + struct msm_dp_mst_bridge *dp_bridge; + int i; + + if (!dp_display) { + DRM_ERROR("invalid input\n"); + return; + } + + for (i = 0; i < mst->max_streams; i++) { + dp_bridge = &mst->mst_bridge[i]; + mst_conn = to_msm_dp_mst_connector(dp_bridge->connector); + dp_panel = dp_bridge->msm_dp_panel; + + if (!dp_panel || !mst_conn || !mst_conn->mst_port) + continue; + + if (dp_panel->drm_edid) { + drm_edid_free(dp_panel->drm_edid); + dp_panel->drm_edid = NULL; + } + } +} + /* DP MST HPD IRQ callback */ void msm_dp_mst_display_hpd_irq(struct msm_dp *dp_display) { @@ -585,6 +613,9 @@ void msm_dp_mst_display_hpd_irq(struct msm_dp *dp_display) if (handled) { rc = drm_dp_dpcd_writeb(mst->dp_aux, esi_res, ack[1]); + if (ack[1] & DP_UP_REQ_MSG_RDY) + msm_dp_mst_clear_panel_edid(dp_display); + if (rc != 1) DRM_ERROR("dpcd esi_res failed. rc=%d\n", rc); @@ -620,6 +651,9 @@ static int msm_dp_mst_connector_get_modes(struct drm_connector *connector) struct msm_dp_mst *mst = dp_display->msm_dp_mst; struct msm_dp_panel *dp_panel = mst_conn->dp_panel; + if (dp_panel->drm_edid) + goto duplicate_edid; + drm_edid_free(dp_panel->drm_edid); dp_panel->drm_edid = drm_dp_mst_edid_read(connector, &mst->mst_mgr, mst_conn->mst_port); @@ -628,6 +662,7 @@ static int msm_dp_mst_connector_get_modes(struct drm_connector *connector) return -EINVAL; } +duplicate_edid: drm_edid_connector_update(connector, dp_panel->drm_edid); return drm_edid_connector_add_modes(connector); @@ -894,6 +929,10 @@ static int msm_dp_mst_connector_atomic_check(struct drm_connector *connector, static void dp_mst_connector_destroy(struct drm_connector *connector) { struct msm_dp_mst_connector *mst_conn = to_msm_dp_mst_connector(connector); + struct msm_dp_panel *dp_panel = mst_conn->dp_panel; + + drm_edid_free(dp_panel->drm_edid); + dp_panel->drm_edid = NULL; drm_connector_cleanup(connector); drm_dp_mst_put_port_malloc(mst_conn->mst_port);