| From 83da6eea3af669ee0b1f1bc05ffd6150af984994 Mon Sep 17 00:00:00 2001 |
| From: Evan Quan <evan.quan@amd.com> |
| Date: Wed, 2 Sep 2020 16:10:10 +0800 |
| Subject: drm/amd/pm: increase mclk switch threshold to 200 us |
| |
| From: Evan Quan <evan.quan@amd.com> |
| |
| commit 83da6eea3af669ee0b1f1bc05ffd6150af984994 upstream. |
| |
| To avoid underflow seen on Polaris10 with some 3440x1440 |
| 144Hz displays. As the threshold of 190 us cuts too close |
| to minVBlankTime of 192 us. |
| |
| Signed-off-by: Evan Quan <evan.quan@amd.com> |
| Acked-by: Alex Deucher <alexander.deucher@amd.com> |
| Signed-off-by: Alex Deucher <alexander.deucher@amd.com> |
| Cc: stable@vger.kernel.org |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| |
| --- |
| drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c | 2 +- |
| 1 file changed, 1 insertion(+), 1 deletion(-) |
| |
| --- a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c |
| +++ b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c |
| @@ -2873,7 +2873,7 @@ static int smu7_vblank_too_short(struct |
| if (hwmgr->is_kicker) |
| switch_limit_us = data->is_memory_gddr5 ? 450 : 150; |
| else |
| - switch_limit_us = data->is_memory_gddr5 ? 190 : 150; |
| + switch_limit_us = data->is_memory_gddr5 ? 200 : 150; |
| break; |
| case CHIP_VEGAM: |
| switch_limit_us = 30; |