From nobody Wed Oct 1 22:38:32 2025 Received: from lelvem-ot02.ext.ti.com (lelvem-ot02.ext.ti.com [198.47.23.235]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 34CFD26FDBB for ; Mon, 29 Sep 2025 08:40:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.47.23.235 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759135246; cv=none; b=HLbvme4mOBmF/5CqAhAwBMI4R+x7SCSNuXVha25DhZkXq7/l0MH9Fqgcv07kgFQvhwPHI48s0LMhYT1fWjtK6A1kWPpPnhhiNxt31rh9utIO2xpqBEPog9ryEBtgxmGGFkxvhxdm4PP0Y0ChCFWYkj3d9ZeEOhBXxxWAZvstxT0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759135246; c=relaxed/simple; bh=xpp1/8sqG1dt0Y9i9XRBKiXtDVM8fj35IZSqnKH0xHU=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Dag+f89IEddDDyy84Hk/RUf9jqxi33kYuMxCHl8OCEwl6OTjcxgXvVRpbg1pl+xI2weBvkS7eHelEp34yEpB8IS4JqYxufWwFMSQ0oBuDC/O6HOT5RQxaxA6DD5eFh62UXwLTjBFqVGOedKE+DG2KpQ0N6S03TQNylbaGbNL/p4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com; spf=pass smtp.mailfrom=ti.com; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b=RCFAzacZ; arc=none smtp.client-ip=198.47.23.235 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ti.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="RCFAzacZ" Received: from lelvem-sh02.itg.ti.com ([10.180.78.226]) by lelvem-ot02.ext.ti.com (8.15.2/8.15.2) with ESMTP id 58T8dqtL2642339; Mon, 29 Sep 2025 03:39:52 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1759135192; bh=/yhLWidxyoLpcFc937MBLxMXj0vNb8iaOiq8gk7eNXc=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=RCFAzacZK3y9scxiDoOGN4zIRiE2+kFm1NFX//AyPgxZPvewQkVSzo4faJ+WyJ6d9 GNGuJPYhXNhknH9boPFiNWC5dYUHTmusP/D1ZI6Y/RTti9OdbvdUrPJoxjuOMtw94l ah/N7CTohrNs8+sxgRKn6vEt426zjefdX+aJZqno= Received: from DLEE106.ent.ti.com (dlee106.ent.ti.com [157.170.170.36]) by lelvem-sh02.itg.ti.com (8.18.1/8.18.1) with ESMTPS id 58T8dqhS1784062 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA256 bits=128 verify=FAIL); Mon, 29 Sep 2025 03:39:52 -0500 Received: from DLEE206.ent.ti.com (157.170.170.90) by DLEE106.ent.ti.com (157.170.170.36) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.55; Mon, 29 Sep 2025 03:39:51 -0500 Received: from lelvem-mr06.itg.ti.com (10.180.75.8) by DLEE206.ent.ti.com (157.170.170.90) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20 via Frontend Transport; Mon, 29 Sep 2025 03:39:51 -0500 Received: from hkshenoy.dhcp.ti.com (hkshenoy.dhcp.ti.com [172.24.235.208] (may be forged)) by lelvem-mr06.itg.ti.com (8.18.1/8.18.1) with ESMTP id 58T8daaO927539; Mon, 29 Sep 2025 03:39:44 -0500 From: Harikrishna Shenoy To: , , , , , , , , , , , , , , , , , , , , , , , , CC: , Subject: [PATCH v7 1/6] drm/bridge: cadence: cdns-mhdp8546-core: Remove legacy support for connector initialisation in bridge Date: Mon, 29 Sep 2025 14:09:31 +0530 Message-ID: <20250929083936.1575685-2-h-shenoy@ti.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250929083936.1575685-1-h-shenoy@ti.com> References: <20250929083936.1575685-1-h-shenoy@ti.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-C2ProcessedOrg: 333ef613-75bf-4e12-a4b1-8e3623f5dcea Content-Type: text/plain; charset="utf-8" From: Jayesh Choudhary Now that we have DBANC framework, remove the connector initialisation code as that piece of code is not called if DRM_BRIDGE_ATTACH_NO_CONNECTOR flag is used. Only TI K3 platforms consume this driver and tidss (their display controller) has this flag set. So this legacy support can be dropped. Reviewed-by: Dmitry Baryshkov Signed-off-by: Jayesh Choudhary Signed-off-by: Harikrishna Shenoy --- .../drm/bridge/cadence/cdns-mhdp8546-core.c | 187 +----------------- 1 file changed, 10 insertions(+), 177 deletions(-) diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c b/drivers/= gpu/drm/bridge/cadence/cdns-mhdp8546-core.c index a614d1384f71..08702ade2903 100644 --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c @@ -739,12 +739,8 @@ static void cdns_mhdp_fw_cb(const struct firmware *fw,= void *context) spin_lock(&mhdp->start_lock); bridge_attached =3D mhdp->bridge_attached; spin_unlock(&mhdp->start_lock); - if (bridge_attached) { - if (mhdp->connector.dev) - drm_kms_helper_hotplug_event(mhdp->bridge.dev); - else - drm_bridge_hpd_notify(&mhdp->bridge, cdns_mhdp_detect(mhdp)); - } + if (bridge_attached) + drm_bridge_hpd_notify(&mhdp->bridge, cdns_mhdp_detect(mhdp)); } =20 static int cdns_mhdp_load_firmware(struct cdns_mhdp_device *mhdp) @@ -1444,56 +1440,6 @@ static const struct drm_edid *cdns_mhdp_edid_read(st= ruct cdns_mhdp_device *mhdp, return drm_edid_read_custom(connector, cdns_mhdp_get_edid_block, mhdp); } =20 -static int cdns_mhdp_get_modes(struct drm_connector *connector) -{ - struct cdns_mhdp_device *mhdp =3D connector_to_mhdp(connector); - const struct drm_edid *drm_edid; - int num_modes; - - if (!mhdp->plugged) - return 0; - - drm_edid =3D cdns_mhdp_edid_read(mhdp, connector); - - drm_edid_connector_update(connector, drm_edid); - - if (!drm_edid) { - dev_err(mhdp->dev, "Failed to read EDID\n"); - return 0; - } - - num_modes =3D drm_edid_connector_add_modes(connector); - drm_edid_free(drm_edid); - - /* - * HACK: Warn about unsupported display formats until we deal - * with them correctly. - */ - if (connector->display_info.color_formats && - !(connector->display_info.color_formats & - mhdp->display_fmt.color_format)) - dev_warn(mhdp->dev, - "%s: No supported color_format found (0x%08x)\n", - __func__, connector->display_info.color_formats); - - if (connector->display_info.bpc && - connector->display_info.bpc < mhdp->display_fmt.bpc) - dev_warn(mhdp->dev, "%s: Display bpc only %d < %d\n", - __func__, connector->display_info.bpc, - mhdp->display_fmt.bpc); - - return num_modes; -} - -static int cdns_mhdp_connector_detect(struct drm_connector *conn, - struct drm_modeset_acquire_ctx *ctx, - bool force) -{ - struct cdns_mhdp_device *mhdp =3D connector_to_mhdp(conn); - - return cdns_mhdp_detect(mhdp); -} - static u32 cdns_mhdp_get_bpp(struct cdns_mhdp_display_fmt *fmt) { u32 bpp; @@ -1547,114 +1493,6 @@ bool cdns_mhdp_bandwidth_ok(struct cdns_mhdp_device= *mhdp, return true; } =20 -static -enum drm_mode_status cdns_mhdp_mode_valid(struct drm_connector *conn, - const struct drm_display_mode *mode) -{ - struct cdns_mhdp_device *mhdp =3D connector_to_mhdp(conn); - - mutex_lock(&mhdp->link_mutex); - - if (!cdns_mhdp_bandwidth_ok(mhdp, mode, mhdp->link.num_lanes, - mhdp->link.rate)) { - mutex_unlock(&mhdp->link_mutex); - return MODE_CLOCK_HIGH; - } - - mutex_unlock(&mhdp->link_mutex); - return MODE_OK; -} - -static int cdns_mhdp_connector_atomic_check(struct drm_connector *conn, - struct drm_atomic_state *state) -{ - struct cdns_mhdp_device *mhdp =3D connector_to_mhdp(conn); - struct drm_connector_state *old_state, *new_state; - struct drm_crtc_state *crtc_state; - u64 old_cp, new_cp; - - if (!mhdp->hdcp_supported) - return 0; - - old_state =3D drm_atomic_get_old_connector_state(state, conn); - new_state =3D drm_atomic_get_new_connector_state(state, conn); - old_cp =3D old_state->content_protection; - new_cp =3D new_state->content_protection; - - if (old_state->hdcp_content_type !=3D new_state->hdcp_content_type && - new_cp !=3D DRM_MODE_CONTENT_PROTECTION_UNDESIRED) { - new_state->content_protection =3D DRM_MODE_CONTENT_PROTECTION_DESIRED; - goto mode_changed; - } - - if (!new_state->crtc) { - if (old_cp =3D=3D DRM_MODE_CONTENT_PROTECTION_ENABLED) - new_state->content_protection =3D DRM_MODE_CONTENT_PROTECTION_DESIRED; - return 0; - } - - if (old_cp =3D=3D new_cp || - (old_cp =3D=3D DRM_MODE_CONTENT_PROTECTION_DESIRED && - new_cp =3D=3D DRM_MODE_CONTENT_PROTECTION_ENABLED)) - return 0; - -mode_changed: - crtc_state =3D drm_atomic_get_new_crtc_state(state, new_state->crtc); - crtc_state->mode_changed =3D true; - - return 0; -} - -static const struct drm_connector_helper_funcs cdns_mhdp_conn_helper_funcs= =3D { - .detect_ctx =3D cdns_mhdp_connector_detect, - .get_modes =3D cdns_mhdp_get_modes, - .mode_valid =3D cdns_mhdp_mode_valid, - .atomic_check =3D cdns_mhdp_connector_atomic_check, -}; - -static const struct drm_connector_funcs cdns_mhdp_conn_funcs =3D { - .fill_modes =3D drm_helper_probe_single_connector_modes, - .atomic_duplicate_state =3D drm_atomic_helper_connector_duplicate_state, - .atomic_destroy_state =3D drm_atomic_helper_connector_destroy_state, - .reset =3D drm_atomic_helper_connector_reset, - .destroy =3D drm_connector_cleanup, -}; - -static int cdns_mhdp_connector_init(struct cdns_mhdp_device *mhdp) -{ - u32 bus_format =3D MEDIA_BUS_FMT_RGB121212_1X36; - struct drm_connector *conn =3D &mhdp->connector; - struct drm_bridge *bridge =3D &mhdp->bridge; - int ret; - - conn->polled =3D DRM_CONNECTOR_POLL_HPD; - - ret =3D drm_connector_init(bridge->dev, conn, &cdns_mhdp_conn_funcs, - DRM_MODE_CONNECTOR_DisplayPort); - if (ret) { - dev_err(mhdp->dev, "Failed to initialize connector with drm\n"); - return ret; - } - - drm_connector_helper_add(conn, &cdns_mhdp_conn_helper_funcs); - - ret =3D drm_display_info_set_bus_formats(&conn->display_info, - &bus_format, 1); - if (ret) - return ret; - - ret =3D drm_connector_attach_encoder(conn, bridge->encoder); - if (ret) { - dev_err(mhdp->dev, "Failed to attach connector to encoder\n"); - return ret; - } - - if (mhdp->hdcp_supported) - ret =3D drm_connector_attach_content_protection_property(conn, true); - - return ret; -} - static int cdns_mhdp_attach(struct drm_bridge *bridge, struct drm_encoder *encoder, enum drm_bridge_attach_flags flags) @@ -1671,9 +1509,11 @@ static int cdns_mhdp_attach(struct drm_bridge *bridg= e, return ret; =20 if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) { - ret =3D cdns_mhdp_connector_init(mhdp); - if (ret) - goto aux_unregister; + ret =3D -EINVAL; + dev_err(mhdp->dev, + "Connector initialisation not supported in bridge_attach %d\n", + ret); + goto aux_unregister; } =20 spin_lock(&mhdp->start_lock); @@ -2368,17 +2208,10 @@ static void cdns_mhdp_hpd_work(struct work_struct *= work) struct cdns_mhdp_device *mhdp =3D container_of(work, struct cdns_mhdp_device, hpd_work); - int ret; =20 - ret =3D cdns_mhdp_update_link_status(mhdp); - if (mhdp->connector.dev) { - if (ret < 0) - schedule_work(&mhdp->modeset_retry_work); - else - drm_kms_helper_hotplug_event(mhdp->bridge.dev); - } else { - drm_bridge_hpd_notify(&mhdp->bridge, cdns_mhdp_detect(mhdp)); - } + cdns_mhdp_update_link_status(mhdp); + + drm_bridge_hpd_notify(&mhdp->bridge, cdns_mhdp_detect(mhdp)); } =20 static int cdns_mhdp_probe(struct platform_device *pdev) --=20 2.34.1 From nobody Wed Oct 1 22:38:32 2025 Received: from lelvem-ot01.ext.ti.com (lelvem-ot01.ext.ti.com [198.47.23.234]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DCD9E20297E for ; Mon, 29 Sep 2025 08:40:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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charset="utf-8" From: Jayesh Choudhary After adding DBANC framework, mhdp->connector is not initialised during bridge_attach(). The connector is however required in few driver calls like cdns_mhdp_hdcp_enable() and cdns_mhdp_modeset_retry_fn(). Now that we have dropped the legacy code which became redundant with introduction of DBNAC usecase in driver, we can cleanly switch to drm_connector pointer instead of structure. Set it in bridge_enable() and clear it in bridge_disable(), and make appropriate changes. This allows us to dynamically set the reference in bridge_enable() when the connector becomes available and clear it in bridge_disable(). This change is necessary to properly integrate with the DBANC framework while maintaining all connector-dependent functionality in the driver. Signed-off-by: Jayesh Choudhary Signed-off-by: Harikrishna Shenoy --- drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c | 12 ++++++------ drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h | 2 +- drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-hdcp.c | 8 ++++---- 3 files changed, 11 insertions(+), 11 deletions(-) diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c b/drivers/= gpu/drm/bridge/cadence/cdns-mhdp8546-core.c index 08702ade2903..c2ce3d6e5a88 100644 --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c @@ -1755,7 +1755,6 @@ static void cdns_mhdp_atomic_enable(struct drm_bridge= *bridge, struct cdns_mhdp_device *mhdp =3D bridge_to_mhdp(bridge); struct cdns_mhdp_bridge_state *mhdp_state; struct drm_crtc_state *crtc_state; - struct drm_connector *connector; struct drm_connector_state *conn_state; struct drm_bridge_state *new_state; const struct drm_display_mode *mode; @@ -1785,12 +1784,12 @@ static void cdns_mhdp_atomic_enable(struct drm_brid= ge *bridge, cdns_mhdp_reg_write(mhdp, CDNS_DPTX_CAR, resp | CDNS_VIF_CLK_EN | CDNS_VIF_CLK_RSTN); =20 - connector =3D drm_atomic_get_new_connector_for_encoder(state, - bridge->encoder); - if (WARN_ON(!connector)) + mhdp->connector =3D drm_atomic_get_new_connector_for_encoder(state, + bridge->encoder); + if (WARN_ON(!mhdp->connector)) goto out; =20 - conn_state =3D drm_atomic_get_new_connector_state(state, connector); + conn_state =3D drm_atomic_get_new_connector_state(state, mhdp->connector); if (WARN_ON(!conn_state)) goto out; =20 @@ -1853,6 +1852,7 @@ static void cdns_mhdp_atomic_disable(struct drm_bridg= e *bridge, cdns_mhdp_hdcp_disable(mhdp); =20 mhdp->bridge_enabled =3D false; + mhdp->connector =3D NULL; cdns_mhdp_reg_read(mhdp, CDNS_DP_FRAMER_GLOBAL_CONFIG, &resp); resp &=3D ~CDNS_DP_FRAMER_EN; resp |=3D CDNS_DP_NO_VIDEO_MODE; @@ -2134,7 +2134,7 @@ static void cdns_mhdp_modeset_retry_fn(struct work_st= ruct *work) =20 mhdp =3D container_of(work, typeof(*mhdp), modeset_retry_work); =20 - conn =3D &mhdp->connector; + conn =3D mhdp->connector; =20 /* Grab the locks before changing connector property */ mutex_lock(&conn->dev->mode_config.mutex); diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h b/drivers/= gpu/drm/bridge/cadence/cdns-mhdp8546-core.h index bad2fc0c7306..b297db53ba28 100644 --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.h @@ -375,7 +375,7 @@ struct cdns_mhdp_device { */ struct mutex link_mutex; =20 - struct drm_connector connector; + struct drm_connector *connector; struct drm_bridge bridge; =20 struct cdns_mhdp_link link; diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-hdcp.c b/drivers/= gpu/drm/bridge/cadence/cdns-mhdp8546-hdcp.c index 42248f179b69..59f18c3281ef 100644 --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-hdcp.c +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-hdcp.c @@ -394,7 +394,7 @@ static int _cdns_mhdp_hdcp_disable(struct cdns_mhdp_dev= ice *mhdp) int ret; =20 dev_dbg(mhdp->dev, "[%s:%d] HDCP is being disabled...\n", - mhdp->connector.name, mhdp->connector.base.id); + mhdp->connector->name, mhdp->connector->base.id); =20 ret =3D cdns_mhdp_hdcp_set_config(mhdp, 0, false); =20 @@ -445,7 +445,7 @@ static int cdns_mhdp_hdcp_check_link(struct cdns_mhdp_d= evice *mhdp) =20 dev_err(mhdp->dev, "[%s:%d] HDCP link failed, retrying authentication\n", - mhdp->connector.name, mhdp->connector.base.id); + mhdp->connector->name, mhdp->connector->base.id); =20 ret =3D _cdns_mhdp_hdcp_disable(mhdp); if (ret) { @@ -487,13 +487,13 @@ static void cdns_mhdp_hdcp_prop_work(struct work_stru= ct *work) struct cdns_mhdp_device *mhdp =3D container_of(hdcp, struct cdns_mhdp_device, hdcp); - struct drm_device *dev =3D mhdp->connector.dev; + struct drm_device *dev =3D mhdp->connector->dev; struct drm_connector_state *state; =20 drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); mutex_lock(&mhdp->hdcp.mutex); if (mhdp->hdcp.value !=3D DRM_MODE_CONTENT_PROTECTION_UNDESIRED) { - state =3D mhdp->connector.state; + state =3D mhdp->connector->state; state->content_protection =3D mhdp->hdcp.value; } mutex_unlock(&mhdp->hdcp.mutex); 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charset="utf-8" From: Jayesh Choudhary In case if we get errors in cdns_mhdp_link_up() or cdns_mhdp_reg_read() in atomic_enable, we will go to cdns_mhdp_modeset_retry_fn() and will hit NULL pointer while trying to access the mutex. We need the connector to be set before that. Unlike in legacy !(DBANC) cases, we do not have connector initialised in bridge_attach(). Now that we have the connector pointer in mhdp bridge structure, so set the mhdp->connector in atomic_enable() earlier to avoid possible NULL pointer dereference in recovery paths like modeset_retry_fn() with the DBANC flag set. Fixes: c932ced6b585 ("drm/tidss: Update encoder/bridge chain connect model") Signed-off-by: Jayesh Choudhary Signed-off-by: Harikrishna Shenoy --- .../drm/bridge/cadence/cdns-mhdp8546-core.c | 20 +++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c b/drivers/= gpu/drm/bridge/cadence/cdns-mhdp8546-core.c index c2ce3d6e5a88..b2f5a48cac2d 100644 --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c @@ -1759,12 +1759,21 @@ static void cdns_mhdp_atomic_enable(struct drm_brid= ge *bridge, struct drm_bridge_state *new_state; const struct drm_display_mode *mode; u32 resp; - int ret; + int ret =3D 0; =20 dev_dbg(mhdp->dev, "bridge enable\n"); =20 mutex_lock(&mhdp->link_mutex); =20 + mhdp->connector =3D drm_atomic_get_new_connector_for_encoder(state, + bridge->encoder); + if (WARN_ON(!mhdp->connector)) + goto out; + + conn_state =3D drm_atomic_get_new_connector_state(state, mhdp->connector); + if (WARN_ON(!conn_state)) + goto out; + if (mhdp->plugged && !mhdp->link_up) { ret =3D cdns_mhdp_link_up(mhdp); if (ret < 0) @@ -1784,15 +1793,6 @@ static void cdns_mhdp_atomic_enable(struct drm_bridg= e *bridge, cdns_mhdp_reg_write(mhdp, CDNS_DPTX_CAR, resp | CDNS_VIF_CLK_EN | CDNS_VIF_CLK_RSTN); =20 - mhdp->connector =3D drm_atomic_get_new_connector_for_encoder(state, - bridge->encoder); - if (WARN_ON(!mhdp->connector)) - goto out; - - conn_state =3D drm_atomic_get_new_connector_state(state, mhdp->connector); - if (WARN_ON(!conn_state)) - goto out; - if (mhdp->hdcp_supported && mhdp->hw_state =3D=3D MHDP_HW_READY && conn_state->content_protection =3D=3D --=20 2.34.1 From nobody Wed Oct 1 22:38:32 2025 Received: from fllvem-ot04.ext.ti.com (fllvem-ot04.ext.ti.com [198.47.19.246]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9050B2F9D89 for ; Mon, 29 Sep 2025 10:04:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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charset="utf-8" From: Jayesh Choudhary Add cdns_mhdp_bridge_mode_valid() to check if specific mode is valid for this bridge or not. In the legacy !(DBANC) usecase, we were using the hook from drm_connector_helper_funcs but with removal of legacy code, we need to have mode_valid() in drm_bridge_funcs. Fixes: c932ced6b585 ("drm/tidss: Update encoder/bridge chain connect model") Reviewed-by: Tomi Valkeinen Signed-off-by: Jayesh Choudhary Signed-off-by: Harikrishna Shenoy --- .../drm/bridge/cadence/cdns-mhdp8546-core.c | 20 +++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c b/drivers/= gpu/drm/bridge/cadence/cdns-mhdp8546-core.c index b2f5a48cac2d..47c657237c37 100644 --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c @@ -1999,6 +1999,25 @@ static const struct drm_edid *cdns_mhdp_bridge_edid_= read(struct drm_bridge *brid return cdns_mhdp_edid_read(mhdp, connector); } =20 +static enum drm_mode_status +cdns_mhdp_bridge_mode_valid(struct drm_bridge *bridge, + const struct drm_display_info *info, + const struct drm_display_mode *mode) +{ + struct cdns_mhdp_device *mhdp =3D bridge_to_mhdp(bridge); + + mutex_lock(&mhdp->link_mutex); + + if (!cdns_mhdp_bandwidth_ok(mhdp, mode, mhdp->link.num_lanes, + mhdp->link.rate)) { + mutex_unlock(&mhdp->link_mutex); 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charset="utf-8" From: Jayesh Choudhary Reduce the log level for cdns_mhdp_dpcd_read and cdns_mhdp_dpcd_write errors in cdns_mhdp_transfer function as in case of failure, there is flooding of these prints along with other indicators like EDID failure logs which are fairly intuitive in themselves rendering these error logs useless. Also, the caller functions for the cdns_mhdp_transfer in drm_dp_helper.c (which calls it 32 times), has debug log level in case transfer fails. So having a superseding log level in cdns_mhdp_transfer seems bad. Reviewed-by: Tomi Valkeinen Signed-off-by: Jayesh Choudhary Signed-off-by: Harikrishna Shenoy --- drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c b/drivers/= gpu/drm/bridge/cadence/cdns-mhdp8546-core.c index 47c657237c37..4fb1db3e030c 100644 --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c @@ -778,7 +778,7 @@ static ssize_t cdns_mhdp_transfer(struct drm_dp_aux *au= x, if (!ret) continue; =20 - dev_err(mhdp->dev, + dev_dbg(mhdp->dev, "Failed to write DPCD addr %u\n", msg->address + i); =20 @@ -788,7 +788,7 @@ static ssize_t cdns_mhdp_transfer(struct drm_dp_aux *au= x, ret =3D cdns_mhdp_dpcd_read(mhdp, msg->address, msg->buffer, msg->size); if (ret) { - dev_err(mhdp->dev, + dev_dbg(mhdp->dev, "Failed to read DPCD addr %u\n", msg->address); =20 --=20 2.34.1 From nobody Wed Oct 1 22:38:32 2025 Received: from fllvem-ot04.ext.ti.com (fllvem-ot04.ext.ti.com [198.47.19.246]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 172C321CC79 for ; Mon, 29 Sep 2025 10:04:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.47.19.246 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759140259; cv=none; b=RRpaFpx3nycE/UCSVpVd+SGC50ihyaGL4nD9NDcWdHRH+PsyIhbXhoAzqjc1glg6FeorlSaW/LSuTAalk8J3qZ/fNBClMHoDGTompM1GI0d3LKqSluKblwXptVoCp3XLNJNMDtGNXjo5tlrhh68aXiUGoapGkWsjIu6pIsVCJaI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759140259; c=relaxed/simple; bh=2Db6JK+9qU6+n6xzou5MYcl981d9OTnJrXHGLT+GgQY=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=YllKQ8q4DR9rPDMzzXz2AEfMcsQ+o13eEoppCeM98mSW222RJ420SUOORkbDQgTL4JvLvxAo602Eaz+Bsh9DyQJG3jMTHTNYdozAZSZDQPM0yToP+3z4GDc1dDGeoKQuLKzmLnlfRgXIWmDUX8uUM0zoOEYfZKul4LaN+d0bQSQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com; spf=pass smtp.mailfrom=ti.com; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b=ha/2/fMp; arc=none smtp.client-ip=198.47.19.246 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ti.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="ha/2/fMp" Received: from lelvem-sh01.itg.ti.com ([10.180.77.71]) by fllvem-ot04.ext.ti.com (8.15.2/8.15.2) with ESMTP id 58T8eRhO2600120; Mon, 29 Sep 2025 03:40:27 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1759135227; bh=VApXdUO/9O99aqmwI5WYjzoN2cC9O/Qt6WvdtIHKInM=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=ha/2/fMpq7akLW/ZWYu0Xl2MOSaQyWicnsdG1CT8M3xrZNhY09xppjwrsxORPFEFN PwcDFzoDn9rnPUegu8ceG4+ata5waMrf8KSP7nkj4S71+J9myHiOnE9Zvs+u4ZuD9d W198Htq8xdyDja83tclsO4Z+DLsNpbjTVdOFhzTE= Received: from DFLE109.ent.ti.com (dfle109.ent.ti.com [10.64.6.30]) by lelvem-sh01.itg.ti.com (8.18.1/8.18.1) with ESMTPS id 58T8eRxt1216611 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA256 bits=128 verify=FAIL); Mon, 29 Sep 2025 03:40:27 -0500 Received: from DFLE203.ent.ti.com (10.64.6.61) by DFLE109.ent.ti.com (10.64.6.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2507.55; Mon, 29 Sep 2025 03:40:27 -0500 Received: from lelvem-mr06.itg.ti.com (10.180.75.8) by DFLE203.ent.ti.com (10.64.6.61) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20 via Frontend Transport; Mon, 29 Sep 2025 03:40:27 -0500 Received: from hkshenoy.dhcp.ti.com (hkshenoy.dhcp.ti.com [172.24.235.208] (may be forged)) by lelvem-mr06.itg.ti.com (8.18.1/8.18.1) with ESMTP id 58T8daaT927539; Mon, 29 Sep 2025 03:40:20 -0500 From: Harikrishna Shenoy To: , , , , , , , , , , , , , , , , , , , , , , , , CC: , Subject: [PATCH v7 6/6] drm/bridge: cadence: cdns-mhdp8546-core: Handle HDCP state in bridge atomic check Date: Mon, 29 Sep 2025 14:09:36 +0530 Message-ID: <20250929083936.1575685-7-h-shenoy@ti.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250929083936.1575685-1-h-shenoy@ti.com> References: <20250929083936.1575685-1-h-shenoy@ti.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-C2ProcessedOrg: 333ef613-75bf-4e12-a4b1-8e3623f5dcea Content-Type: text/plain; charset="utf-8" Now that we have DBANC framework and legacy connector functions removed, handle the HDCP disabling in bridge atomic check rather than in connector atomic check in !(DBANC) usecase. Signed-off-by: Harikrishna Shenoy --- .../drm/bridge/cadence/cdns-mhdp8546-core.c | 23 +++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c b/drivers/= gpu/drm/bridge/cadence/cdns-mhdp8546-core.c index 4fb1db3e030c..af41b2908a74 100644 --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c @@ -1960,6 +1960,10 @@ static int cdns_mhdp_atomic_check(struct drm_bridge = *bridge, { struct cdns_mhdp_device *mhdp =3D bridge_to_mhdp(bridge); const struct drm_display_mode *mode =3D &crtc_state->adjusted_mode; + struct drm_connector_state *old_state, *new_state; + struct drm_atomic_state *state =3D crtc_state->state; + struct drm_connector *conn =3D mhdp->connector; + u64 old_cp, new_cp; =20 mutex_lock(&mhdp->link_mutex); =20 @@ -1979,6 +1983,25 @@ static int cdns_mhdp_atomic_check(struct drm_bridge = *bridge, if (mhdp->info) bridge_state->input_bus_cfg.flags =3D *mhdp->info->input_bus_flags; =20 + if (conn && mhdp->hdcp_supported) { + old_state =3D drm_atomic_get_old_connector_state(state, conn); + new_state =3D drm_atomic_get_new_connector_state(state, conn); + old_cp =3D old_state->content_protection; + new_cp =3D new_state->content_protection; + + if (old_state->hdcp_content_type !=3D new_state->hdcp_content_type && + new_cp !=3D DRM_MODE_CONTENT_PROTECTION_UNDESIRED) { + new_state->content_protection =3D DRM_MODE_CONTENT_PROTECTION_DESIRED; + crtc_state =3D drm_atomic_get_new_crtc_state(state, new_state->crtc); + crtc_state->mode_changed =3D true; + } + + if (!new_state->crtc) { + if (old_cp =3D=3D DRM_MODE_CONTENT_PROTECTION_ENABLED) + new_state->content_protection =3D DRM_MODE_CONTENT_PROTECTION_DESIRED; + } + } + mutex_unlock(&mhdp->link_mutex); return 0; } --=20 2.34.1