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drm/amd/display: Change power gating off sequence to fix hang

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Power off plane clear all the reg values includes cursor.
When OS call set cursor position, cursor address reg is cleared,
results in system hard hang.

Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Yongqiang Sun
2017-09-26 17:12:48 -04:00
committed by Alex Deucher
parent 75a7475576
commit bb9042da8e
1 changed files with 5 additions and 2 deletions
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drivers/gpu/drm/amd/display/dc/core/dc.c
+5 -2
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@@ -1254,9 +1254,12 @@ bool dc_post_update_surfaces_to_stream(struct dc *dc)
post_surface_trace(dc);
for (i = 0; i < core_dc->current_context->res_ctx.pool->pipe_count; i++)
if (core_dc->current_context->res_ctx.pipe_ctx[i].stream == NULL)
if (core_dc->current_context->res_ctx.pipe_ctx[i].stream == NULL) {
core_dc->current_context->res_ctx.pipe_ctx[i].pipe_idx = i;
core_dc->hwss.power_down_front_end(
core_dc, &core_dc->current_context->res_ctx.pipe_ctx[i]);
core_dc, &core_dc->current_context->res_ctx.pipe_ctx[i]);
}
if (core_dc->res_pool->funcs->validate_bandwidth(core_dc, core_dc->current_context)
!= DC_OK) {