{"id":26239,"url":"https://patchwork.libcamera.org/api/1.1/patches/26239/?format=json","web_url":"https://patchwork.libcamera.org/patch/26239/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/1.1/projects/1/?format=json","name":"libcamera","link_name":"libcamera","list_id":"libcamera_core","list_email":"libcamera-devel@lists.libcamera.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20260225221859.600869-3-floss@jetm.me>","date":"2026-02-25T22:18:59","name":"[2/2] ipa: simple: data: Add OV2740 tuning file","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"31e0ba6a726ee4cf6955f2feba9db13ae2dfe997","submitter":{"id":261,"url":"https://patchwork.libcamera.org/api/1.1/people/261/?format=json","name":"Javier 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Tia <floss@jetm.me>","To":"libcamera-devel@lists.libcamera.org","Cc":"Javier Tia <floss@jetm.me>","Subject":"[PATCH 2/2] ipa: simple: data: Add OV2740 tuning file","Date":"Wed, 25 Feb 2026 16:18:59 -0600","Message-ID":"<20260225221859.600869-3-floss@jetm.me>","X-Mailer":"git-send-email 2.53.0","In-Reply-To":"<20260225221859.600869-1-floss@jetm.me>","References":"<20260225221859.600869-1-floss@jetm.me>","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"<libcamera-devel.lists.libcamera.org>","List-Unsubscribe":"<https://lists.libcamera.org/options/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=unsubscribe>","List-Archive":"<https://lists.libcamera.org/pipermail/libcamera-devel/>","List-Post":"<mailto:libcamera-devel@lists.libcamera.org>","List-Help":"<mailto:libcamera-devel-request@lists.libcamera.org?subject=help>","List-Subscribe":"<https://lists.libcamera.org/listinfo/libcamera-devel>,\n\t<mailto:libcamera-devel-request@lists.libcamera.org?subject=subscribe>","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" <libcamera-devel-bounces@lists.libcamera.org>"},"content":"Add a sensor-specific tuning file for the OmniVision OV2740, commonly\nfound in Intel IPU6 laptops (ThinkPad X1 Carbon, XPS, Surface).\n\nThe tuning enables all Simple IPA algorithms including AGC, AWB, black\nlevel correction, and a color correction matrix calibrated for 6500K.\nThe CCM compensates for the green bias inherent in Bayer demosaicing\n(the GRBG pattern has 2x green pixels vs red/blue).\n\nWithout this file, libcamera falls back to uncalibrated.yaml which\nproduces a heavy green tint on the OV2740.\n\nSigned-off-by: Javier Tia <floss@jetm.me>\n---\n src/ipa/simple/data/meson.build |  1 +\n src/ipa/simple/data/ov2740.yaml | 22 ++++++++++++++++++++++\n 2 files changed, 23 insertions(+)\n create mode 100644 src/ipa/simple/data/ov2740.yaml","diff":"diff --git a/src/ipa/simple/data/meson.build b/src/ipa/simple/data/meson.build\nindex 92795ee4..e3e4de74 100644\n--- a/src/ipa/simple/data/meson.build\n+++ b/src/ipa/simple/data/meson.build\n@@ -1,6 +1,7 @@\n # SPDX-License-Identifier: CC0-1.0\n \n conf_files = files([\n+    'ov2740.yaml',\n     'uncalibrated.yaml',\n ])\n \ndiff --git a/src/ipa/simple/data/ov2740.yaml b/src/ipa/simple/data/ov2740.yaml\nnew file mode 100644\nindex 00000000..b48d50ce\n--- /dev/null\n+++ b/src/ipa/simple/data/ov2740.yaml\n@@ -0,0 +1,22 @@\n+# SPDX-License-Identifier: CC0-1.0\n+#\n+# OmniVision OV2740 tuning for libcamera Simple/SoftISP pipeline.\n+#\n+# Tested on ThinkPad X1 Carbon Gen 10 (Alder Lake) with Intel IPU6 ISYS.\n+# The CCM corrects the green bias inherent in Bayer demosaicing (2:1 green\n+# to red/blue pixel ratio in the CFA). Values were iteratively calibrated\n+# from captured frame measurements under 6500K lighting.\n+%YAML 1.1\n+---\n+version: 1\n+algorithms:\n+  - BlackLevel:\n+  - Awb:\n+  - Ccm:\n+      ccms:\n+        - ct: 6500\n+          ccm: [ 2.49, -0.91, -0.26,\n+                -0.30,  1.20,  0.10,\n+                 0.07, -0.80,  2.19 ]\n+  - Adjust:\n+  - Agc:\n","prefixes":["2/2"]}