From 87563fc0301f44f7a37ecba9490a60507ae9bbf2 Mon Sep 17 00:00:00 2001
From: Shashank Sharma <shashank.sharma@intel.com>
Date: Thu, 13 Jul 2017 21:03:10 +0530
Subject: [PATCH] drm/edid: cleanup patch for CEA extended-tag macro
Mime-version: 1.0
Content-type: text/plain; charset=UTF-8
Content-transfer-encoding: 8bit
Git-commit: 87563fc0301f44f7a37ecba9490a60507ae9bbf2
Patch-mainline: v4.14-rc1
References: FATE#322643 bsc#1055900
CEA-861-F introduces extended tag codes for EDID extension blocks,
which indicates the actual type of the data block. The code for
using exteded tag is 0x7, whereas in the existing code, the
corresponding macro is named as "VIDEO_CAPABILITY_BLOCK"
This patch renames the macro and usages from "VIDEO_CAPABILITY_BLOCK"
to "USE_EXTENDED_TAG"
V2: Add extended tag code check for video capabilitiy block (ville)
V3: Ville: - Use suggested names for macros - Check the block length first, before checking the extended tag
V4: Fix commit message (David)
V5: Introduced this patch into HDMI-YCBCR-output series
V6: Rebase
V7: Rebase
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Signed-off-by: Shashank Sharma <shashank.sharma@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1499960000-9232-5-git-send-email-shashank.sharma@intel.com
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/gpu/drm/drm_edid.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -2781,7 +2781,8 @@ add_detailed_modes(struct drm_connector
#define VIDEO_BLOCK 0x02
#define VENDOR_BLOCK 0x03
#define SPEAKER_BLOCK 0x04
-#define VIDEO_CAPABILITY_BLOCK 0x07
+#define USE_EXTENDED_TAG 0x07
+#define EXT_VIDEO_CAPABILITY_BLOCK 0x00
#define EDID_BASIC_AUDIO (1 << 6)
#define EDID_CEA_YCRCB444 (1 << 5)
#define EDID_CEA_YCRCB422 (1 << 4)
@@ -3442,6 +3443,12 @@ cea_db_payload_len(const u8 *db)
}
static int
+cea_db_extended_tag(const u8 *db)
+{
+ return db[1];
+}
+
+static int
cea_db_tag(const u8 *db)
{
return db[0] >> 5;
@@ -4017,8 +4024,10 @@ bool drm_rgb_quant_range_selectable(stru
return false;
for_each_cea_db(edid_ext, i, start, end) {
- if (cea_db_tag(&edid_ext[i]) == VIDEO_CAPABILITY_BLOCK &&
- cea_db_payload_len(&edid_ext[i]) == 2) {
+ if (cea_db_tag(&edid_ext[i]) == USE_EXTENDED_TAG &&
+ cea_db_payload_len(&edid_ext[i]) == 2 &&
+ cea_db_extended_tag(&edid_ext[i]) ==
+ EXT_VIDEO_CAPABILITY_BLOCK) {
DRM_DEBUG_KMS("CEA VCDB 0x%02x\n", edid_ext[i + 2]);
return edid_ext[i + 2] & EDID_CEA_VCDB_QS;
}