From 460b397f8d645fb76a7a23ade1ae8b2c37cf2424 Mon Sep 17 00:00:00 2001
From: Wenjing Liu <Wenjing.Liu@amd.com>
Date: Tue, 7 Jan 2020 16:33:32 -0500
Subject: drm/amd/display: Add debug option to disable DSC support
Git-commit: 07d4f905329438b8e4daf7f58f5afea7d781a9b2
Patch-mainline: v5.6-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322

[how]
Empty dsc enc caps when debug option is set to disable DSC.

Signed-off-by: Wenjing Liu <Wenjing.Liu@amd.com>
Reviewed-by: Nikola Cornij <Nikola.Cornij@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/amd/display/dc/dc.h         | 1 +
 drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index 3fa85a54360f..7d31dcb9e37f 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -425,6 +425,7 @@ struct dc_debug_options {
 	bool validate_dml_output;
 	bool enable_dmcub_surface_flip;
 	bool usbc_combo_phy_reset_wa;
+	bool disable_dsc;
 };
 
 struct dc_debug_data {
diff --git a/drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c b/drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c
index 8b78fcbfe746..87d682d25278 100644
--- a/drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c
+++ b/drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c
@@ -224,7 +224,8 @@ static void get_dsc_enc_caps(
 
 	memset(dsc_enc_caps, 0, sizeof(struct dsc_enc_caps));
 	if (dsc) {
-		dsc->funcs->dsc_get_enc_caps(dsc_enc_caps, pixel_clock_100Hz);
+		if (!dsc->ctx->dc->debug.disable_dsc)
+			dsc->funcs->dsc_get_enc_caps(dsc_enc_caps, pixel_clock_100Hz);
 		if (dsc->ctx->dc->debug.native422_support)
 			dsc_enc_caps->color_formats.bits.YCBCR_NATIVE_422 = 1;
 	}
-- 
2.28.0