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(unknown [58.22.7.114]) by smtp.qiye.163.com (Hmail) with ESMTP id 3923a3025; Wed, 1 Apr 2026 17:15:52 +0800 (GMT+08:00) From: Damon Ding To: andrzej.hajda@intel.com, neil.armstrong@linaro.org, rfoss@kernel.org, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, victor.liu@nxp.com, shawnguo@kernel.org, s.hauer@pengutronix.de, inki.dae@samsung.com, sw0312.kim@samsung.com, kyungmin.park@samsung.com, krzk@kernel.org, jingoohan1@gmail.com, p.zabel@pengutronix.de, hjc@rock-chips.com, heiko@sntech.de, andy.yan@rock-chips.com Cc: Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@gmail.com, kernel@pengutronix.de, festevam@gmail.com, alim.akhtar@samsung.com, dmitry.baryshkov@oss.qualcomm.com, luca.ceresoli@bootlin.com, nicolas.frattaroli@collabora.com, dianders@chromium.org, m.szyprowski@samsung.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-rockchip@lists.infradead.org, Damon Ding Subject: [PATCH v12 12/17] drm/bridge: analogix_dp: Add new API analogix_dp_finish_probe() Date: Wed, 1 Apr 2026 17:14:49 +0800 Message-Id: <20260401091454.25730-13-damon.ding@rock-chips.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260401091454.25730-1-damon.ding@rock-chips.com> References: <20260401091454.25730-1-damon.ding@rock-chips.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-HM-Tid: 0a9d4853ec2b03a3kunm479af8c3b32e98 X-HM-MType: 1 X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgPGg8OCBgUHx5ZQUlOS1dZFg8aDwILHllBWSg2Ly tZV1koWUFDSUNOT01LS0k3V1ktWUFJV1kPCRoVCBIfWUFZQ05MS1YZSBgZGEhKGh0dTxpWFRQJFh oXVRMBExYaEhckFA4PWVdZGBILWUFZTkNVSUlVTFVKSk9ZV1kWGg8SFR0UWUFZT0tIVUpLSEpKQk 1VSktLVUpCWQY+ DKIM-Signature: a=rsa-sha256; b=IRz54cGRL/K84H5dxtRmFIntCy1YXSjPXozF0BREETkPWVaqYAXwgBQRQD8pnR27hKBItI7fsfnbcX5koLE//ddN0nlGwl0MtsNGWYnh0GrAz0XfFM5PeYRzW8aFW/Y29mYD5L5+Kk2BFVdE/7GBL6G5hWKly745kRgX8Wbz5Bo=; c=relaxed/relaxed; s=default; d=rock-chips.com; v=1; bh=SjS5hoz5lALYwIBYUHhAR12nD30o7Vp6mbmnlUx69mY=; h=date:mime-version:subject:message-id:from; Content-Type: text/plain; charset="utf-8" Since the panel/bridge should logically be positioned behind the Analogix bridge in the display pipeline, it makes sense to handle the panel/bridge parsing on the Analogix side. Therefore, we add a new API analogix_dp_finish_probe(), which combines the panel/bridge parsing with component addition, to do it. In order to process component binding right after the probe completes, the &analogix_dp_plat_data.ops is newly added to pass &component_ops, for which the &dp_aux_ep_device_with_data.done_probing() of DP AUX bus only supports passing &drm_dp_aux. Signed-off-by: Damon Ding Reviewed-by: Dmitry Baryshkov Tested-by: Marek Szyprowski Tested-by: Heiko Stuebner (on rk3588) --- Changes in v4: - Rename the &analogix_dp_plat_data.bridge to &analogix_dp_plat_data.next_bridge. - Remame API analogix_dp_find_panel_or_bridge() to analogix_dp_finish_probe(). Changes in v5: - Select DRM_DISPLAY_DP_AUX_BUS for DRM_ANALOGIX_DP. Changes in v9: - Add Tested-by tag. Changes in v10: - Fix to use dev_err_probe() in analogix_dp_finish_probe(). - Expand the commit message. --- drivers/gpu/drm/bridge/analogix/Kconfig | 1 + .../drm/bridge/analogix/analogix_dp_core.c | 46 +++++++++++++++++++ include/drm/bridge/analogix_dp.h | 2 + 3 files changed, 49 insertions(+) diff --git a/drivers/gpu/drm/bridge/analogix/Kconfig b/drivers/gpu/drm/brid= ge/analogix/Kconfig index 4846b2e9be7c..964122b5bd39 100644 --- a/drivers/gpu/drm/bridge/analogix/Kconfig +++ b/drivers/gpu/drm/bridge/analogix/Kconfig @@ -29,6 +29,7 @@ config DRM_ANALOGIX_ANX78XX config DRM_ANALOGIX_DP tristate depends on DRM + select DRM_DISPLAY_DP_AUX_BUS =20 config DRM_ANALOGIX_ANX7625 tristate "Analogix Anx7625 MIPI to DP interface support" diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/g= pu/drm/bridge/analogix/analogix_dp_core.c index 81c6e81dd352..b112df52cabf 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -20,12 +20,14 @@ #include =20 #include +#include #include #include #include #include #include #include +#include #include #include #include @@ -1581,6 +1583,50 @@ struct drm_dp_aux *analogix_dp_get_aux(struct analog= ix_dp_device *dp) } EXPORT_SYMBOL_GPL(analogix_dp_get_aux); =20 +static int analogix_dp_aux_done_probing(struct drm_dp_aux *aux) +{ + struct analogix_dp_device *dp =3D to_dp(aux); + struct analogix_dp_plat_data *plat_data =3D dp->plat_data; + int port =3D plat_data->dev_type =3D=3D EXYNOS_DP ? 0 : 1; + int ret; + + /* + * If drm_of_find_panel_or_bridge() returns -ENODEV, there may be no vali= d panel + * or bridge nodes. The driver should go on for the driver-free bridge or= the DP + * mode applications. + */ + ret =3D drm_of_find_panel_or_bridge(dp->dev->of_node, port, 0, + &plat_data->panel, &plat_data->next_bridge); + if (ret && ret !=3D -ENODEV) + return ret; + + return component_add(dp->dev, plat_data->ops); +} + +int analogix_dp_finish_probe(struct analogix_dp_device *dp) +{ + int ret; + + ret =3D devm_of_dp_aux_populate_bus(&dp->aux, analogix_dp_aux_done_probin= g); + if (ret) { + /* + * If devm_of_dp_aux_populate_bus() returns -ENODEV, the done_probing() = will + * not be called because there are no EP devices. Then the callback func= tion + * analogix_dp_aux_done_probing() will be called directly in order to su= pport + * the other valid DT configurations. + * + * NOTE: The devm_of_dp_aux_populate_bus() is allowed to return -EPROBE_= DEFER. + */ + if (ret !=3D -ENODEV) + return dev_err_probe(dp->dev, ret, "failed to populate aux bus\n"); + + return analogix_dp_aux_done_probing(&dp->aux); + } + + return 0; +} +EXPORT_SYMBOL_GPL(analogix_dp_finish_probe); + MODULE_AUTHOR("Jingoo Han "); MODULE_DESCRIPTION("Analogix DP Core Driver"); MODULE_LICENSE("GPL v2"); diff --git a/include/drm/bridge/analogix_dp.h b/include/drm/bridge/analogix= _dp.h index 3428ffff24c5..bae969dec63a 100644 --- a/include/drm/bridge/analogix_dp.h +++ b/include/drm/bridge/analogix_dp.h @@ -30,6 +30,7 @@ struct analogix_dp_plat_data { struct drm_bridge *next_bridge; struct drm_encoder *encoder; struct drm_connector *connector; + const struct component_ops *ops; =20 int (*power_on)(struct analogix_dp_plat_data *); int (*power_off)(struct analogix_dp_plat_data *); @@ -49,5 +50,6 @@ int analogix_dp_stop_crc(struct drm_connector *connector); =20 struct analogix_dp_plat_data *analogix_dp_aux_to_plat_data(struct drm_dp_a= ux *aux); struct drm_dp_aux *analogix_dp_get_aux(struct analogix_dp_device *dp); +int analogix_dp_finish_probe(struct analogix_dp_device *dp); =20 #endif /* _ANALOGIX_DP_H_ */ --=20 2.34.1