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drm/bridge: lt8912b: do not return negative values from .get_modes() 

[ Upstream commit 171b711b26cce208bb628526b1b368aeec7b6fa4 ]

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@gmail.com>
Cc: stable@vger.kernel.org
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/dcdddcbcb64b6f6cdc55022ee50c10dee8ddbc3d.1709913674.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jani Nikula 2024-03-08 18:03:42 +02:00 committed by Greg Kroah-Hartman
parent d5a81e9817
commit 47ccb849a0
1 changed files with 7 additions and 9 deletions
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16
drivers/gpu/drm/bridge/lontium-lt8912b.c
View File

@ -430,23 +430,21 @@ 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;