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drm/amd/display: fix resource saving missing when power state switch

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Signed-off-by: Tao.Huang <Tao.Huang@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Tao.Huang 2019-05-06 16:26:54 +08:00 committed by Alex Deucher
parent c3e50f8900
commit 540c122924
1 changed files with 11 additions and 0 deletions
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11
drivers/gpu/drm/amd/display/dc/core/dc.c
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@ -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)