drm/amd/display: register edp_backlight_control() for DCN301

As made mention of in commit 099303e9a9bd ("drm/amd/display: eDP
intermittent black screen during PnP"), we need to turn off the
display's backlight before powering off an eDP display. Not doing so
will result in undefined behaviour according to the eDP spec. So, set
DCN301's edp_backlight_control() function pointer to
dce110_edp_backlight_control().

Cc: stable@vger.kernel.org
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2765
Fixes: 9c75891feef0 ("drm/amd/display: rework recent update PHY state commit")
Suggested-by: Swapnil Patel <swapnil.patel@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_init.c b/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_init.c
index 257df8660b4cafef2a64231487729bbd2d4b3486..61205cdbe2d5abdb73d3249501b12873dae8243a 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_init.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn301/dcn301_init.c
@@ -75,6 +75,7 @@ static const struct hw_sequencer_funcs dcn301_funcs = {
        .get_hw_state = dcn10_get_hw_state,
        .clear_status_bits = dcn10_clear_status_bits,
        .wait_for_mpcc_disconnect = dcn10_wait_for_mpcc_disconnect,
+       .edp_backlight_control = dce110_edp_backlight_control,
        .edp_power_control = dce110_edp_power_control,
        .edp_wait_for_hpd_ready = dce110_edp_wait_for_hpd_ready,
        .set_cursor_position = dcn10_set_cursor_position,