Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Received-SPF: Fail (protection.outlook.com: domain of arm.com does not
 designate 63.35.35.123 as permitted sender) receiver=protection.outlook.com;
 client-ip=63.35.35.123; helo=64aa7808-outbound-1.mta.getcheckrecipient.com;
From:   "james qian wang (Arm Technology China)" <james.qian.wang@arm.com>
To:     Liviu Dudau <Liviu.Dudau@arm.com>,
        "airlied@linux.ie" <airlied@linux.ie>,
        Brian Starkey <Brian.Starkey@arm.com>,
        "maarten.lankhorst@linux.intel.com" 
        <maarten.lankhorst@linux.intel.com>,
        "sean@poorly.run" <sean@poorly.run>,
        Mihail Atanassov <Mihail.Atanassov@arm.com>,
        "imirkin@alum.mit.edu" <imirkin@alum.mit.edu>
CC:     "Jonathan Chai (Arm Technology China)" <Jonathan.Chai@arm.com>,
        "Julien Yin (Arm Technology China)" <Julien.Yin@arm.com>,
        "Thomas Sun (Arm Technology China)" <thomas.Sun@arm.com>,
        "Lowry Li (Arm Technology China)" <Lowry.Li@arm.com>,
        Ayan Halder <Ayan.Halder@arm.com>,
        "Tiannan Zhu (Arm Technology China)" <Tiannan.Zhu@arm.com>,
        "Yiqi Kang (Arm Technology China)" <Yiqi.Kang@arm.com>,
        nd <nd@arm.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "dri-devel@lists.freedesktop.org" <dri-devel@lists.freedesktop.org>,
        Ben Davis <Ben.Davis@arm.com>,
        "Oscar Zhang (Arm Technology China)" <Oscar.Zhang@arm.com>,
        "Channing Chen (Arm Technology China)" <Channing.Chen@arm.com>,
        "james qian wang (Arm Technology China)" <james.qian.wang@arm.com>
Subject: [PATCH v9 2/4] drm/komeda: Add drm_lut_to_fgamma_coeffs()
Thread-Topic: [PATCH v9 2/4] drm/komeda: Add drm_lut_to_fgamma_coeffs()
Thread-Index: AQHVmUWbKgyTbmPF30mDCSrJAJAYVQ==
Date:   Tue, 12 Nov 2019 10:40:31 +0000
Message-ID: <20191112103956.19074-3-james.qian.wang@arm.com>
References: <20191112103956.19074-1-james.qian.wang@arm.com>
In-Reply-To: <20191112103956.19074-1-james.qian.wang@arm.com>
Accept-Language: en-US
Content-Language: en-US
Authentication-Results-Original: spf=none (sender IP is )
 smtp.mailfrom=james.qian.wang@arm.com; 
x-ms-exchange-messagesentrepresentingtype: 1
x-mailer: git-send-email 2.20.1
x-ms-publictraffictype: Email
X-MS-Office365-Filtering-HT: Tenant
X-MS-Office365-Filtering-Correlation-Id: c3f940a8-7e4f-489e-5854-08d7675cc303
X-MS-TrafficTypeDiagnostic: AM0PR08MB4082:|AM0PR08MB4082:|AM6PR08MB3477:
x-ms-exchange-transport-forked: True
X-Microsoft-Antispam-PRVS: <AM6PR08MB347795902691F985C491852EB3770@AM6PR08MB3477.eurprd08.prod.outlook.com>
x-checkrecipientrouted: true
x-ms-oob-tlc-oobclassifiers: OLM:2043;OLM:2043;
x-forefront-prvs: 021975AE46
X-Forefront-Antispam-Report-Untrusted: SFV:NSPM;SFS:(10009020)(979002)(4636009)(376002)(366004)(346002)(396003)(136003)(39860400002)(199004)(189003)(86362001)(6512007)(478600001)(66066001)(54906003)(110136005)(316002)(5660300002)(6486002)(14454004)(2171002)(11346002)(446003)(2616005)(6436002)(25786009)(476003)(2201001)(14444005)(1076003)(6506007)(8936002)(386003)(99286004)(2906002)(4326008)(55236004)(102836004)(103116003)(256004)(66946007)(66556008)(66476007)(64756008)(66446008)(6116002)(3846002)(52116002)(26005)(81166006)(81156014)(8676002)(186003)(7736002)(486006)(71190400001)(71200400001)(36756003)(305945005)(76176011)(50226002)(2501003)(969003)(989001)(999001)(1009001)(1019001);DIR:OUT;SFP:1101;SCL:1;SRVR:AM0PR08MB4082;H:AM0PR08MB4995.eurprd08.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;A:1;MX:1;
received-spf: None (protection.outlook.com: arm.com does not designate
 permitted sender hosts)
X-MS-Exchange-SenderADCheck: 1
X-Microsoft-Antispam-Untrusted: BCL:0;
X-Microsoft-Antispam-Message-Info-Original: a3v/DQSfKb9ZZFqlQ2LipZjWy8dFhQAnHCkcn8pf0fi6AHxYczSwTGPAOb4RoCIGQOkSvD9HLZ9jHk4CA0mxXodCeWpgvv3IPBfESGVxOz/6ZM5QzzHM6vBVUtNZAozTueldrJaZtNsS2pB3NQ97bZb4KUaZGYkN1f+aZxCrDuSR/i7RmfNtmjNFimIbpvs9DrOMwFsFYbJNcoWjliiVlH4NbsJkHe5uxRFK5+K/qFEE+zgcf9ar2rJpKSDls/dG57Y2Phg7qr99/dN8Qo8LXH05wPtl3Lxj6yqt7r+q5dBk2vizPFOcYznQ+sN3nBAvrxtxXioYiK70TledlUPuwnXraXIlyeb7tpf51va5WyMsu0zvB2RXSyl5UfEEaW+Q9FV57dx41iJsvl4i1CDZUPk8Tcq9imkDYDrjDjM5WKPgcrZ/X6sCzMpiCOknWStt
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR08MB4082
Original-Authentication-Results: spf=none (sender IP is )
 smtp.mailfrom=james.qian.wang@arm.com; 
X-EOPAttributedMessage: 0
X-MS-Exchange-Transport-CrossTenantHeadersStripped: VE1EUR03FT053.eop-EUR03.prod.protection.outlook.com
X-Forefront-Antispam-Report: CIP:63.35.35.123;IPV:CAL;SCL:-1;CTRY:IE;EFV:NLI;SFV:NSPM;SFS:(10009020)(979002)(4636009)(396003)(346002)(39860400002)(376002)(136003)(1110001)(339900001)(189003)(199004)(70206006)(386003)(103116003)(66066001)(126002)(14444005)(6506007)(76176011)(2616005)(476003)(446003)(70586007)(4326008)(11346002)(76130400001)(22756006)(486006)(102836004)(47776003)(2171002)(23756003)(186003)(6512007)(356004)(336012)(26005)(6486002)(105606002)(36756003)(2201001)(8936002)(1076003)(2906002)(8676002)(14454004)(110136005)(316002)(305945005)(36906005)(7736002)(478600001)(8746002)(50466002)(50226002)(26826003)(25786009)(99286004)(2501003)(86362001)(81156014)(5660300002)(6116002)(3846002)(81166006)(54906003)(969003)(989001)(999001)(1009001)(1019001);DIR:OUT;SFP:1101;SCL:1;SRVR:AM6PR08MB3477;H:64aa7808-outbound-1.mta.getcheckrecipient.com;FPR:;SPF:Fail;LANG:en;PTR:ec2-63-35-35-123.eu-west-1.compute.amazonaws.com;MX:1;A:1;
X-MS-Office365-Filtering-Correlation-Id-Prvs: 5aaa2bfe-eacc-40e4-cf60-08d7675cbd74
NoDisclaimer: True
X-Forefront-PRVS: 021975AE46
X-Microsoft-Antispam: BCL:0;
X-Microsoft-Antispam-Message-Info: fKXuJFX0/WfW6jn65IVDanZFKLOVdhs116TBe0+5vvQTrjPidMQpcMDze0bwd41Ce7jS36bL0J0fF8JkYEw8iLiaEsxrWNhAHutAup5YQFW8uJ8J1jez4d4A4hQBIXf8Ak5dw37DcVmtVF8alPYY3YL7ezWBnQPbOGm6mmAR5XFaTa8APcb6fEYOaIt58TipU6MfZLgZoh5g2F4aqrX2pFmr91LF85n+R8Z7P5OYYz/In1R+egTgKczLaVL5cD3pt+i18TS9VXSsBX4MYzem1oiiSJjP9ot0wkjnyjXVmT8kFTyF2nOLZ66s0oT2MtI4Z8srLxXonMKq4h08BEggc3vBhnLDBv6SypHxKhkHBsCggMmYzAYYMRkACaqN6ziT6+He79/zEgkjQoyZP0kO+l+pkjh5V0/trcDQcZPrX1kL+qHnXFwEYqI/NTALlCeK
X-OriginatorOrg: arm.com
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 12 Nov 2019 10:40:40.1231
 (UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: c3f940a8-7e4f-489e-5854-08d7675cc303
X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d
X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[63.35.35.123];Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com]
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem
X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM6PR08MB3477
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

This function is used to convert drm color lut to komeda HW required curve
coeffs values.

Signed-off-by: james qian wang (Arm Technology China) <james.qian.wang@arm.=
com>
Reviewed-by: Mihail Atanassov <mihail.atanassov@arm.com>
---
 .../arm/display/komeda/komeda_color_mgmt.c    | 52 +++++++++++++++++++
 .../arm/display/komeda/komeda_color_mgmt.h    |  9 +++-
 2 files changed, 60 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.c b/drive=
rs/gpu/drm/arm/display/komeda/komeda_color_mgmt.c
index 9d14a92dbb17..c180ce70c26c 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.c
@@ -65,3 +65,55 @@ const s32 *komeda_select_yuv2rgb_coeffs(u32 color_encodi=
ng, u32 color_range)
=20
 	return coeffs;
 }
+
+struct gamma_curve_sector {
+	u32 boundary_start;
+	u32 num_of_segments;
+	u32 segment_width;
+};
+
+struct gamma_curve_segment {
+	u32 start;
+	u32 end;
+};
+
+static struct gamma_curve_sector sector_tbl[] =3D {
+	{ 0,    4,  4   },
+	{ 16,   4,  4   },
+	{ 32,   4,  8   },
+	{ 64,   4,  16  },
+	{ 128,  4,  32  },
+	{ 256,  4,  64  },
+	{ 512,  16, 32  },
+	{ 1024, 24, 128 },
+};
+
+static void
+drm_lut_to_coeffs(struct drm_property_blob *lut_blob, u32 *coeffs,
+		  struct gamma_curve_sector *sector_tbl, u32 num_sectors)
+{
+	struct drm_color_lut *lut;
+	u32 i, j, in, num =3D 0;
+
+	if (!lut_blob)
+		return;
+
+	lut =3D lut_blob->data;
+
+	for (i =3D 0; i < num_sectors; i++) {
+		for (j =3D 0; j < sector_tbl[i].num_of_segments; j++) {
+			in =3D sector_tbl[i].boundary_start +
+			     j * sector_tbl[i].segment_width;
+
+			coeffs[num++] =3D drm_color_lut_extract(lut[in].red,
+						KOMEDA_COLOR_PRECISION);
+		}
+	}
+
+	coeffs[num] =3D BIT(KOMEDA_COLOR_PRECISION);
+}
+
+void drm_lut_to_fgamma_coeffs(struct drm_property_blob *lut_blob, u32 *coe=
ffs)
+{
+	drm_lut_to_coeffs(lut_blob, coeffs, sector_tbl, ARRAY_SIZE(sector_tbl));
+}
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.h b/drive=
rs/gpu/drm/arm/display/komeda/komeda_color_mgmt.h
index a2df218f58e7..08ab69281648 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.h
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_color_mgmt.h
@@ -11,7 +11,14 @@
 #include <drm/drm_color_mgmt.h>
=20
 #define KOMEDA_N_YUV2RGB_COEFFS		12
+#define KOMEDA_N_RGB2YUV_COEFFS		12
+#define KOMEDA_COLOR_PRECISION		12
+#define KOMEDA_N_GAMMA_COEFFS		65
+#define KOMEDA_COLOR_LUT_SIZE		BIT(KOMEDA_COLOR_PRECISION)
+#define KOMEDA_N_CTM_COEFFS		9
+
+void drm_lut_to_fgamma_coeffs(struct drm_property_blob *lut_blob, u32 *coe=
ffs);
=20
 const s32 *komeda_select_yuv2rgb_coeffs(u32 color_encoding, u32 color_rang=
e);
=20
-#endif
+#endif /*_KOMEDA_COLOR_MGMT_H_*/
--=20
2.20.1