The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable@xxxxxxxxxxxxxxx>. Thanks, Sasha ------------------ original commit in Linus's tree ------------------ >From 171b711b26cce208bb628526b1b368aeec7b6fa4 Mon Sep 17 00:00:00 2001 From: Jani Nikula <jani.nikula@xxxxxxxxx> Date: Fri, 8 Mar 2024 18:03:42 +0200 Subject: [PATCH] drm/bridge: lt8912b: do not return negative values from .get_modes() The .get_modes() hooks aren't supposed to return negative error codes. Return 0 for no modes, whatever the reason. Cc: Adrien Grassein <adrien.grassein@xxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx Acked-by: Thomas Zimmermann <tzimmermann@xxxxxxx> Link: https://patchwork.freedesktop.org/patch/msgid/dcdddcbcb64b6f6cdc55022ee50c10dee8ddbc3d.1709913674.git.jani.nikula@xxxxxxxxx Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx> --- drivers/gpu/drm/bridge/lontium-lt8912b.c | 16 +++++++--------- 1 file changed, 7 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/bridge/lontium-lt8912b.c b/drivers/gpu/drm/bridge/lontium-lt8912b.c index e7c4bef74aa46..4b2ae27f0a57f 100644 --- a/drivers/gpu/drm/bridge/lontium-lt8912b.c +++ b/drivers/gpu/drm/bridge/lontium-lt8912b.c @@ -441,23 +441,21 @@ lt8912_connector_mode_valid(struct drm_connector *connector, static int lt8912_connector_get_modes(struct drm_connector *connector) { const struct drm_edid *drm_edid; - int ret = -1; - int num = 0; struct lt8912 *lt = connector_to_lt8912(connector); u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24; + int ret, num; drm_edid = drm_bridge_edid_read(lt->hdmi_port, connector); drm_edid_connector_update(connector, drm_edid); - if (drm_edid) { - num = drm_edid_connector_add_modes(connector); - } else { - return ret; - } + if (!drm_edid) + return 0; + + num = drm_edid_connector_add_modes(connector); ret = drm_display_info_set_bus_formats(&connector->display_info, &bus_format, 1); - if (ret) - num = ret; + if (ret < 0) + num = 0; drm_edid_free(drm_edid); return num; -- 2.43.0
