From: "Tao.Huang" <Tao.Huang@xxxxxxx>
Signed-off-by: Tao.Huang <Tao.Huang@xxxxxxx>
Reviewed-by: Jun Lei <Jun.Lei@xxxxxxx>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@xxxxxxx>
---
drivers/gpu/drm/amd/display/dc/core/dc.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index d89a29bd8785..0bff546d3727 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -1930,6 +1930,12 @@ void dc_set_power_state(
enum dc_acpi_cm_power_state power_state)
{
struct kref refcount;
+ struct display_mode_lib *dml = kzalloc(sizeof(struct display_mode_lib),
+ GFP_KERNEL);
+
+ ASSERT(dml);
+ if (!dml)
+ return;
switch (power_state) {
case DC_ACPI_CM_POWER_STATE_D0:
@@ -1946,15 +1952,20 @@ void dc_set_power_state(
/* Preserve refcount */
refcount = dc->current_state->refcount;
+ /* Preserve display mode lib */
+ memcpy(dml, &dc->current_state->bw_ctx.dml, sizeof(struct display_mode_lib));
+
dc_resource_state_destruct(dc->current_state);
memset(dc->current_state, 0,
sizeof(*dc->current_state));
dc->current_state->refcount = refcount;
+ dc->current_state->bw_ctx.dml = *dml;
break;
}
+ kfree(dml);
}
void dc_resume(struct dc *dc)
--
2.17.1
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