From: Chris Park <chris.park@amd.com>
Date: Thu, 23 Jun 2022 22:21:59 +0000 (-0400)
Subject: drm/amd/display: Reduce SCDC Status Flags Definition
X-Git-Tag: v6.6.17~6802^2~8^2~38
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=236124d1167bcc539432b4f6fc19ce1fa015e2ad;p=platform%2Fkernel%2Flinux-rpi.git

drm/amd/display: Reduce SCDC Status Flags Definition

[Why]
Status flags definition is reduced to read
less bytes in SCDC transaction for status update.

[How]
Reduce definition of reserved bytes from 3 to 1
for status update.

Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Solomon Chiu <solomon.chiu@amd.com>
Signed-off-by: Chris Park <chris.park@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c
index b13a516..d01d2ee 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_ddc.c
@@ -93,16 +93,13 @@ union hdmi_scdc_update_read_data {
 };
 
 union hdmi_scdc_status_flags_data {
-	uint8_t byte[2];
+	uint8_t byte;
 	struct {
 		uint8_t CLOCK_DETECTED:1;
 		uint8_t CH0_LOCKED:1;
 		uint8_t CH1_LOCKED:1;
 		uint8_t CH2_LOCKED:1;
 		uint8_t RESERVED:4;
-		uint8_t RESERVED2:8;
-		uint8_t RESERVED3:8;
-
 	} fields;
 };
 
@@ -770,7 +767,7 @@ void dal_ddc_service_read_scdc_data(struct ddc_service *ddc_service)
 				sizeof(scramble_status));
 		offset = HDMI_SCDC_STATUS_FLAGS;
 		dal_ddc_service_query_ddc_data(ddc_service, slave_address,
-				&offset, sizeof(offset), status_data.byte,
+				&offset, sizeof(offset), &status_data.byte,
 				sizeof(status_data.byte));
 	}
 }