From: Wu Hoi Pok Date: Fri, 4 Oct 2024 01:05:59 +0000 (+0800) Subject: drm/radeon: add late_register for connector X-Git-Tag: v6.13-rc1~122^2~15^2~151 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=b4c1ad70e279bacbc772a468033bdecce2f5e0dc;p=thirdparty%2Flinux.git drm/radeon: add late_register for connector The patch is to solve null dereference in 'aux.dev', which is introduced in recent radeon rework. By having 'late_register', the connector should be registered after 'drm_dev_register' automatically, where in before it is the opposite. Fixes: 90985660ba48 ("drm/radeon: remove load callback from kms_driver") Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3665 Tested-by: Hans de Goede Suggested-by: Christophe Leroy Signed-off-by: Wu Hoi Pok Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c index fca8b08535a54..6328627b7c342 100644 --- a/drivers/gpu/drm/radeon/atombios_dp.c +++ b/drivers/gpu/drm/radeon/atombios_dp.c @@ -228,10 +228,8 @@ void radeon_dp_aux_init(struct radeon_connector *radeon_connector) { struct drm_device *dev = radeon_connector->base.dev; struct radeon_device *rdev = dev->dev_private; - int ret; radeon_connector->ddc_bus->rec.hpd = radeon_connector->hpd.hpd; - radeon_connector->ddc_bus->aux.dev = radeon_connector->base.kdev; radeon_connector->ddc_bus->aux.drm_dev = radeon_connector->base.dev; if (ASIC_IS_DCE5(rdev)) { if (radeon_auxch) @@ -242,11 +240,8 @@ void radeon_dp_aux_init(struct radeon_connector *radeon_connector) radeon_connector->ddc_bus->aux.transfer = radeon_dp_aux_transfer_atom; } - ret = drm_dp_aux_register(&radeon_connector->ddc_bus->aux); - if (!ret) - radeon_connector->ddc_bus->has_aux = true; - - WARN(ret, "drm_dp_aux_register() failed with error %d\n", ret); + drm_dp_aux_init(&radeon_connector->ddc_bus->aux); + radeon_connector->ddc_bus->has_aux = true; } /***** general DP utility functions *****/ diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c index 528a8f3677c29..f9c73c55f04f7 100644 --- a/drivers/gpu/drm/radeon/radeon_connectors.c +++ b/drivers/gpu/drm/radeon/radeon_connectors.c @@ -1786,6 +1786,20 @@ static enum drm_mode_status radeon_dp_mode_valid(struct drm_connector *connector return MODE_OK; } +static int +radeon_connector_late_register(struct drm_connector *connector) +{ + struct radeon_connector *radeon_connector = to_radeon_connector(connector); + int r = 0; + + if (radeon_connector->ddc_bus->has_aux) { + radeon_connector->ddc_bus->aux.dev = radeon_connector->base.kdev; + r = drm_dp_aux_register(&radeon_connector->ddc_bus->aux); + } + + return r; +} + static const struct drm_connector_helper_funcs radeon_dp_connector_helper_funcs = { .get_modes = radeon_dp_get_modes, .mode_valid = radeon_dp_mode_valid, @@ -1800,6 +1814,7 @@ static const struct drm_connector_funcs radeon_dp_connector_funcs = { .early_unregister = radeon_connector_unregister, .destroy = radeon_connector_destroy, .force = radeon_dvi_force, + .late_register = radeon_connector_late_register, }; static const struct drm_connector_funcs radeon_edp_connector_funcs = { @@ -1810,6 +1825,7 @@ static const struct drm_connector_funcs radeon_edp_connector_funcs = { .early_unregister = radeon_connector_unregister, .destroy = radeon_connector_destroy, .force = radeon_dvi_force, + .late_register = radeon_connector_late_register, }; static const struct drm_connector_funcs radeon_lvds_bridge_connector_funcs = { @@ -1820,6 +1836,7 @@ static const struct drm_connector_funcs radeon_lvds_bridge_connector_funcs = { .early_unregister = radeon_connector_unregister, .destroy = radeon_connector_destroy, .force = radeon_dvi_force, + .late_register = radeon_connector_late_register, }; void