diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.14.71/4475-drm-amd-display-Clear-underflow-status-for-debug-pur.patch')
| -rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.14.71/4475-drm-amd-display-Clear-underflow-status-for-debug-pur.patch | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.14.71/4475-drm-amd-display-Clear-underflow-status-for-debug-pur.patch b/common/recipes-kernel/linux/linux-yocto-4.14.71/4475-drm-amd-display-Clear-underflow-status-for-debug-pur.patch new file mode 100644 index 00000000..b28647e3 --- /dev/null +++ b/common/recipes-kernel/linux/linux-yocto-4.14.71/4475-drm-amd-display-Clear-underflow-status-for-debug-pur.patch @@ -0,0 +1,39 @@ +From fe08223921db486e3639e0d57c91a660c3d8dad3 Mon Sep 17 00:00:00 2001 +From: Nikola Cornij <nikola.cornij@amd.com> +Date: Fri, 27 Apr 2018 17:26:25 -0400 +Subject: [PATCH 4475/5725] drm/amd/display: Clear underflow status for debug + purposes + +We want to keep underflow sticky bit on for the longevity tests outside +of test environment. For debug purposes it is, however, useful to clear +underflow status after the test that caused it so that the following +tests are not affected. This change fullfils both requirements by clearing +the underflow only from within Windows or Diags test environment. + +Signed-off-by: Nikola Cornij <nikola.cornij@amd.com> +Reviewed-by: Nikola Cornij <Nikola.Cornij@amd.com> +Acked-by: Harry Wentland <harry.wentland@amd.com> +--- + drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c | 6 ++++++ + 1 file changed, 6 insertions(+) + +diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c +index 400d0ca..c40993a 100644 +--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c ++++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c +@@ -326,6 +326,12 @@ void dcn10_log_hw_state(struct dc *dc) + s.h_total, + s.v_total, + s.underflow_occurred_status); ++ ++ // Clear underflow for debug purposes ++ // We want to keep underflow sticky bit on for the longevity tests outside of test environment. ++ // This function is called only from Windows or Diags test environment, hence it's safe to clear ++ // it from here without affecting the original intent. ++ tg->funcs->clear_optc_underflow(tg); + } + DTN_INFO("\n"); + +-- +2.7.4 + |