linux-kernel - [PATCH v2 5/9] drm/display: Add mask definitions for DP_PAYLOAD_ALLOCATE

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Date: Wed, 21 Feb 2024 16:02:11 +0000
From: "Paweł Anikiel" <panikiel@...gle.com>
To: airlied@...il.com, akpm@...ux-foundation.org, conor+dt@...nel.org, 
	daniel@...ll.ch, dinguyen@...nel.org, hverkuil-cisco@...all.nl, 
	krzysztof.kozlowski+dt@...aro.org, maarten.lankhorst@...ux.intel.com, 
	mchehab@...nel.org, mripard@...nel.org, robh+dt@...nel.org, 
	tzimmermann@...e.de
Cc: devicetree@...r.kernel.org, dri-devel@...ts.freedesktop.org, 
	linux-kernel@...r.kernel.org, linux-media@...r.kernel.org, 
	chromeos-krk-upstreaming@...gle.com, ribalda@...omium.org, 
	"Paweł Anikiel" <panikiel@...gle.com>
Subject: [PATCH v2 5/9] drm/display: Add mask definitions for
 DP_PAYLOAD_ALLOCATE_* registers

Each of these registers contains a single value, but not the entire
8 bits:

DP_PAYLOAD_ALLOCATE_SET - Bit 7 Reserved
DP_PAYLOAD_ALLOCATE_START_TIME_SLOT - Bits 7:6 Reserved
DP_PAYLOAD_ALLOCATE_TIME_SLOT_COUNT - Bits 7:6 Reserved

Add definitions to properly mask off values read from these registers.

Signed-off-by: Paweł Anikiel <panikiel@...gle.com>
---
 include/drm/display/drm_dp.h | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/include/drm/display/drm_dp.h b/include/drm/display/drm_dp.h
index 3731828825bd..9dee30190f14 100644
--- a/include/drm/display/drm_dp.h
+++ b/include/drm/display/drm_dp.h
@@ -733,8 +733,13 @@
 # define DP_PANEL_REPLAY_SU_ENABLE                      (1 << 6)
 
 #define DP_PAYLOAD_ALLOCATE_SET		    0x1c0
-#define DP_PAYLOAD_ALLOCATE_START_TIME_SLOT 0x1c1
-#define DP_PAYLOAD_ALLOCATE_TIME_SLOT_COUNT 0x1c2
+# define DP_PAYLOAD_ALLOCATE_SET_MASK	    0x7f
+
+#define DP_PAYLOAD_ALLOCATE_START_TIME_SLOT		0x1c1
+# define DP_PAYLOAD_ALLOCATE_START_TIME_SLOT_MASK	0x3f
+
+#define DP_PAYLOAD_ALLOCATE_TIME_SLOT_COUNT		0x1c2
+# define DP_PAYLOAD_ALLOCATE_TIME_SLOT_COUNT_MASK	0x3f
 
 /* Link/Sink Device Status */
 #define DP_SINK_COUNT			    0x200
-- 
2.44.0.rc0.258.g7320e95886-goog