From 824673a3b91f87f1f582353f7f45eab7578b13cd Mon Sep 17 00:00:00 2001 From: "Leo (Sunpeng) Li" Date: Tue, 16 May 2017 09:55:20 -0400 Subject: [PATCH 0435/4131] drm/amd/display: Fix dcn10 cursor set position hang Calling dcn10_cursor_set_position() before dcn10_cursor_set_attributes() with invalid (0-value) attributes can cause the ASIC to hang. This fix checks that address.quadpart is non-zero within set_position before calling set_attributes. Signed-off-by: Leo (Sunpeng) Li Reviewed-by: Harry Wentland Reviewed-by: Tony Cheng Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/dcn10/dcn10_ipp.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_ipp.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_ipp.c index 3062b7d..082c98c 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_ipp.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_ipp.c @@ -614,6 +614,16 @@ static void dcn10_cursor_set_position( uint32_t cur_en = pos->enable ? 1 : 0; uint32_t dst_x_offset = (src_x_offset >= 0) ? src_x_offset : 0; + /* + * Guard aganst cursor_set_position() from being called with invalid + * attributes + * + * TODO: Look at combining cursor_set_position() and + * cursor_set_attributes() into cursor_update() + */ + if (ippn10->curs_attr.address.quad_part == 0) + return; + dst_x_offset *= param->ref_clk_khz; dst_x_offset /= param->pixel_clk_khz; -- 2.7.4