[PATCH 09/11] drm/amd/display: Create debugging mechanism for Gaming FAMS

[Rodrigo Siqueira]

From: Gianna Binder <gianna.binder at amd.com>

[WHY]
To enable FAMS even during gaming sessions.

[HOW]
By leveraging a new dc.debug parameter.

Reviewed-by: Felipe Clark <felipe.clark at amd.com>
Acked-by: Rodrigo Siqueira <rodrigo.siqueira at amd.com>
Signed-off-by: Gianna Binder <gianna.binder at amd.com>
---
 drivers/gpu/drm/amd/display/dc/dc.h                           | 1 +
 drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c         | 3 +--
 drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource_helpers.c | 3 +--
 3 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index 90e71c3e766f..110ef14445d9 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -850,6 +850,7 @@ struct dc_debug_options {
 	/* Enable dmub aux for legacy ddc */
 	bool enable_dmub_aux_for_legacy_ddc;
 	bool disable_fams;
+	bool disable_fams_gaming;
 	/* FEC/PSR1 sequence enable delay in 100us */
 	uint8_t fec_enable_delay_in100us;
 	bool enable_driver_sequence_debug;
diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c
index a8cb066bc138..abe4c12a10b5 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c
@@ -1987,11 +1987,10 @@ bool dcn30_can_support_mclk_switch_using_fw_based_vblank_stretch(struct dc *dc,
 	if (!is_refresh_rate_support_mclk_switch_using_fw_based_vblank_stretch(context))
 		return false;
 
-	// check if freesync enabled
 	if (!context->streams[0]->allow_freesync)
 		return false;
 
-	if (context->streams[0]->vrr_active_variable)
+	if (context->streams[0]->vrr_active_variable && dc->debug.disable_fams_gaming)
 		return false;
 
 	context->streams[0]->fpo_in_use = true;
diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource_helpers.c b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource_helpers.c
index a9c41ef0751f..5be242a1b82c 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource_helpers.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource_helpers.c
@@ -595,11 +595,10 @@ struct dc_stream_state *dcn32_can_support_mclk_switch_using_fw_based_vblank_stre
 	if (!is_refresh_rate_support_mclk_switch_using_fw_based_vblank_stretch(fpo_candidate_stream, fpo_vactive_margin_us))
 		return NULL;
 
-	// check if freesync enabled
 	if (!fpo_candidate_stream->allow_freesync)
 		return NULL;
 
-	if (fpo_candidate_stream->vrr_active_variable)
+	if (fpo_candidate_stream->vrr_active_variable && dc->debug.disable_fams_gaming)
 		return NULL;
 
 	return fpo_candidate_stream;
-- 
2.39.2