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From c688110b0cca5748e72f0aecc2fce3c603b15000 Mon Sep 17 00:00:00 2001
From: Yongqiang Sun <yongqiang.sun@amd.com>
Date: Fri, 27 Jan 2017 10:29:01 -0500
Subject: [PATCH 0186/4131] drm/amd/display: Change power gating off sequence
to fix hang
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>
---
drivers/gpu/drm/amd/display/dc/core/dc.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 7571815..474c2d4 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -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) {
--
2.7.4
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