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From:   Heiner Kallweit <hkallweit1@gmail.com>
To:     Wolfram Sang <wsa@kernel.org>,
        Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc:     linux-i2c@vger.kernel.org, Heiner Kallweit <hkallweit1@gmail.com>,
        Maxime Ripard <mripard@kernel.org>,
        Thomas Zimmermann <tzimmermann@suse.de>,
        David Airlie <airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>,
        dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
        Alex Deucher <alexander.deucher@amd.com>
Subject: [PATCH v3 19/20] drivers/gpu/drm/display: remove I2C_CLASS_DDC support
Date:   Sun, 19 Nov 2023 12:28:24 +0100
Message-ID: <20231119112826.5115-20-hkallweit1@gmail.com>
In-Reply-To: <20231119112826.5115-1-hkallweit1@gmail.com>
References: <20231119112826.5115-1-hkallweit1@gmail.com>
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After removal of the legacy EEPROM driver and I2C_CLASS_DDC support in
olpc_dcon there's no i2c client driver left supporting I2C_CLASS_DDC.
Class-based device auto-detection is a legacy mechanism and shouldn't
be used in new code. So we can remove this class completely now.

Preferably this series should be applied via the i2c tree.

Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>

---
 drivers/gpu/drm/display/drm_dp_helper.c       |    1 -
 drivers/gpu/drm/display/drm_dp_mst_topology.c |    1 -
 2 files changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/display/drm_dp_helper.c b/drivers/gpu/drm/display/drm_dp_helper.c
index f3680f4e6..ac901f4b4 100644
--- a/drivers/gpu/drm/display/drm_dp_helper.c
+++ b/drivers/gpu/drm/display/drm_dp_helper.c
@@ -2102,7 +2102,6 @@ int drm_dp_aux_register(struct drm_dp_aux *aux)
 	if (!aux->ddc.algo)
 		drm_dp_aux_init(aux);
 
-	aux->ddc.class = I2C_CLASS_DDC;
 	aux->ddc.owner = THIS_MODULE;
 	aux->ddc.dev.parent = aux->dev;
 
diff --git a/drivers/gpu/drm/display/drm_dp_mst_topology.c b/drivers/gpu/drm/display/drm_dp_mst_topology.c
index 0e0d0e76d..4376e2c1f 100644
--- a/drivers/gpu/drm/display/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/display/drm_dp_mst_topology.c
@@ -5803,7 +5803,6 @@ static int drm_dp_mst_register_i2c_bus(struct drm_dp_mst_port *port)
 	aux->ddc.algo_data = aux;
 	aux->ddc.retries = 3;
 
-	aux->ddc.class = I2C_CLASS_DDC;
 	aux->ddc.owner = THIS_MODULE;
 	/* FIXME: set the kdev of the port's connector as parent */
 	aux->ddc.dev.parent = parent_dev;