diff options
Diffstat (limited to 'common/recipes-kernel/linux/files/0975-drm-amd-dal-Add-retry-mechanism-for-link-training.patch')
| -rw-r--r-- | common/recipes-kernel/linux/files/0975-drm-amd-dal-Add-retry-mechanism-for-link-training.patch | 131 |
1 files changed, 0 insertions, 131 deletions
diff --git a/common/recipes-kernel/linux/files/0975-drm-amd-dal-Add-retry-mechanism-for-link-training.patch b/common/recipes-kernel/linux/files/0975-drm-amd-dal-Add-retry-mechanism-for-link-training.patch deleted file mode 100644 index aa1fea72..00000000 --- a/common/recipes-kernel/linux/files/0975-drm-amd-dal-Add-retry-mechanism-for-link-training.patch +++ /dev/null @@ -1,131 +0,0 @@ -From fa0758869eb00cfbe31058880581bbcdfd0b6195 Mon Sep 17 00:00:00 2001 -From: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com> -Date: Wed, 16 Mar 2016 15:29:35 -0400 -Subject: [PATCH 0975/1110] drm/amd/dal: Add retry mechanism for link training. - -On some displays the training sequence succeedes only -after several consecutive tries. - -Signed-off-by: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com> -Acked-by: Harry Wentland <harry.wentland@amd.com> -Signed-off-by: Alex Deucher <alexander.deucher@amd.com> ---- - drivers/gpu/drm/amd/dal/dc/core/dc_link.c | 6 +++- - drivers/gpu/drm/amd/dal/dc/core/dc_link_dp.c | 51 +++++++++++++++++----------- - drivers/gpu/drm/amd/dal/dc/inc/dc_link_dp.h | 5 +-- - 3 files changed, 40 insertions(+), 22 deletions(-) - -diff --git a/drivers/gpu/drm/amd/dal/dc/core/dc_link.c b/drivers/gpu/drm/amd/dal/dc/core/dc_link.c -index fd406f9..97d6f93 100644 ---- a/drivers/gpu/drm/amd/dal/dc/core/dc_link.c -+++ b/drivers/gpu/drm/amd/dal/dc/core/dc_link.c -@@ -1178,7 +1178,11 @@ static enum dc_status enable_link_dp(struct pipe_ctx *pipe_ctx) - if (link_settings.link_rate == LINK_RATE_LOW) - skip_video_pattern = false; - -- if (perform_link_training(link, &link_settings, skip_video_pattern)) { -+ if (perform_link_training_with_retries( -+ link, -+ &link_settings, -+ skip_video_pattern, -+ 3)) { - link->public.cur_link_settings = link_settings; - status = DC_OK; - } -diff --git a/drivers/gpu/drm/amd/dal/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/dal/dc/core/dc_link_dp.c -index 282a56b..8fe0314 100644 ---- a/drivers/gpu/drm/amd/dal/dc/core/dc_link_dp.c -+++ b/drivers/gpu/drm/amd/dal/dc/core/dc_link_dp.c -@@ -1040,6 +1040,31 @@ bool perform_link_training( - return status; - } - -+ -+bool perform_link_training_with_retries( -+ struct core_link *link, -+ const struct dc_link_settings *link_setting, -+ bool skip_video_pattern, -+ unsigned int retires) -+{ -+ uint8_t j; -+ uint8_t delay_between_retries = 10; -+ -+ for (j = 0; j < retires; ++j) { -+ -+ if (perform_link_training( -+ link, -+ link_setting, -+ skip_video_pattern)) -+ return true; -+ -+ msleep(delay_between_retries); -+ delay_between_retries += 10; -+ } -+ -+ return false; -+} -+ - /*TODO add more check to see if link support request link configuration */ - static bool is_link_setting_supported( - const struct dc_link_settings *link_setting, -@@ -1150,23 +1175,11 @@ bool dp_hbr_verify_link_cap( - if (skip_link_training) - success = true; - else { -- uint8_t num_retries = 3; -- uint8_t j; -- uint8_t delay_between_retries = 10; -- -- for (j = 0; j < num_retries; ++j) { -- success = perform_link_training( -- link, -- cur, -- skip_video_pattern); -- -- if (success) -- break; -- -- msleep(delay_between_retries); -- -- delay_between_retries += 10; -- } -+ success = perform_link_training_with_retries( -+ link, -+ cur, -+ skip_video_pattern, -+ 3); - } - - if (success) -@@ -1527,8 +1540,8 @@ bool dc_link_handle_hpd_rx_irq(const struct dc_link *dc_link) - if (hpd_rx_irq_check_link_loss_status( - link, - &hpd_irq_dpcd_data)) { -- perform_link_training(link, -- &link->public.cur_link_settings, true); -+ perform_link_training_with_retries(link, -+ &link->public.cur_link_settings, true, 3); - status = false; - } - -diff --git a/drivers/gpu/drm/amd/dal/dc/inc/dc_link_dp.h b/drivers/gpu/drm/amd/dal/dc/inc/dc_link_dp.h -index a0ab6b3..b9fb8b9 100644 ---- a/drivers/gpu/drm/amd/dal/dc/inc/dc_link_dp.h -+++ b/drivers/gpu/drm/amd/dal/dc/inc/dc_link_dp.h -@@ -42,10 +42,11 @@ void decide_link_settings( - struct core_stream *stream, - struct dc_link_settings *link_setting); - --bool perform_link_training( -+bool perform_link_training_with_retries( - struct core_link *link, - const struct dc_link_settings *link_setting, -- bool skip_video_pattern); -+ bool skip_video_pattern, -+ unsigned int retires); - - bool is_mst_supported(struct core_link *link); - --- -2.7.4 - |