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drm/amd/display: dcn20: include linux/delay.h

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Without this header, we get a compiler error in some configurations:

.../dc/dcn20/dcn20_hwseq.c: In function 'dcn20_hwss_wait_for_blank_complete':
.../dc/dcn20/dcn20_hwseq.c:1493:3: error: implicit declaration of function 'udelay' [-Werror=implicit-function-declaration]

Note: the use of udelay itself may be problematic, as can occupy
the CPU for 200ms in a busy-loop here.

Fixes: 7ed4e6352c ("drm/amd/display: Add DCN2 HW Sequencer and Resource")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Arnd Bergmann 2019-07-08 15:53:18 +02:00 committed by Alex Deucher
parent d155bef063
commit c602b36fe2
1 changed files with 1 additions and 0 deletions
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drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
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@ -22,6 +22,7 @@
* Authors: AMD
*
*/
#include <linux/delay.h>
#include "dm_services.h"
#include "dm_helpers.h"