From: Sakari Ailus <sakari.ailus@linux.intel.com>
To: linux-media@vger.kernel.org
Cc: mchehab@kernel.org
Subject: [PATCH 12/24] v4l: uapi: ccs: Add CCS controls for shading correction
Date: Mon, 7 Dec 2020 23:15:18 +0200 [thread overview]
Message-ID: <20201207211530.21180-13-sakari.ailus@linux.intel.com> (raw)
In-Reply-To: <20201207211530.21180-1-sakari.ailus@linux.intel.com>
Add V4L2 controls for controlling CCS lens shading correction as well as
conveying its capabilities.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
Documentation/userspace-api/media/drivers/ccs.rst | 13 +++++++++++++
include/uapi/linux/ccs.h | 2 ++
2 files changed, 15 insertions(+)
diff --git a/Documentation/userspace-api/media/drivers/ccs.rst b/Documentation/userspace-api/media/drivers/ccs.rst
index a4bac75e36dd..e0666d564574 100644
--- a/Documentation/userspace-api/media/drivers/ccs.rst
+++ b/Documentation/userspace-api/media/drivers/ccs.rst
@@ -94,4 +94,17 @@ The ``linear`` and ``exponent`` factors can be set using the
``V4L2_CID_CCS_ANALOGUE_LINEAR_GAIN`` and
``V4L2_CID_CCS_ANALOGUE_EXPONENTIAL_GAIN`` controls, respectively
+Shading correction
+~~~~~~~~~~~~~~~~~~
+
+The CCS standard supports lens shading correction. The feature can be controlled
+using ``V4L2_CID_CCS_SHADING_CORRECTION``. Additionally, the luminance
+correction level may be changed using
+``V4L2_CID_CCS_LUMINANCE_CORRECTION_LEVEL``, where value 0 indicates no
+correction and 128 indicates correcting the luminance in corners to 10 % less
+than in the centre.
+
+Shading correction needs to be enabled for luminance correction level to have an
+effect.
+
**Copyright** |copy| 2020 Intel Corporation
diff --git a/include/uapi/linux/ccs.h b/include/uapi/linux/ccs.h
index 6880958ab7b4..445d1789ff44 100644
--- a/include/uapi/linux/ccs.h
+++ b/include/uapi/linux/ccs.h
@@ -12,5 +12,7 @@
#define V4L2_CID_CCS_ANALOGUE_GAIN_C1 (V4L2_CID_USER_CCS_BASE + 4)
#define V4L2_CID_CCS_ANALOGUE_LINEAR_GAIN (V4L2_CID_USER_CCS_BASE + 5)
#define V4L2_CID_CCS_ANALOGUE_EXPONENTIAL_GAIN (V4L2_CID_USER_CCS_BASE + 6)
+#define V4L2_CID_CCS_SHADING_CORRECTION (V4L2_CID_USER_CCS_BASE + 8)
+#define V4L2_CID_CCS_LUMINANCE_CORRECTION_LEVEL (V4L2_CID_USER_CCS_BASE + 9)
#endif
--
2.29.2
next prev parent reply other threads:[~2020-12-07 21:27 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-07 21:15 [PATCH 00/24] Additional CCS feature support Sakari Ailus
2020-12-07 21:15 ` [PATCH 01/24] ccs: Add digital gain support Sakari Ailus
2020-12-07 21:15 ` [PATCH 02/24] ccs: Add support for old-style SMIA digital gain Sakari Ailus
2020-12-07 21:15 ` [PATCH 03/24] ccs: Remove analogue gain field Sakari Ailus
2020-12-07 21:15 ` [PATCH 04/24] ccs: Only add analogue gain control if the device supports it Sakari Ailus
2020-12-07 21:15 ` [PATCH 05/24] v4l: uapi: Add user control base for CCS controls Sakari Ailus
2020-12-07 21:15 ` [PATCH 06/24] Documentation: ccs: Add user documentation for the CCS driver Sakari Ailus
2020-12-07 21:15 ` [PATCH 07/24] v4l: uapi: ccs: Add controls for analogue gain constants Sakari Ailus
2020-12-11 11:39 ` [PATCH v1.1 " Sakari Ailus
2020-12-07 21:15 ` [PATCH 08/24] ccs: Add support for analogue gain coefficient controls Sakari Ailus
2020-12-07 21:15 ` [PATCH 09/24] v4l: uapi: ccs: Add controls for CCS alternative analogue gain Sakari Ailus
2020-12-07 21:15 ` [PATCH 10/24] ccs: Add support for alternate analogue global gain Sakari Ailus
2020-12-07 21:15 ` [PATCH 11/24] ccs: Add debug prints for MSR registers Sakari Ailus
2020-12-07 21:15 ` Sakari Ailus [this message]
2020-12-07 21:15 ` [PATCH 13/24] ccs: Add shading correction and luminance correction level controls Sakari Ailus
2020-12-07 21:15 ` [PATCH 14/24] ccs: Get the endpoint by port rather than any next endpoint Sakari Ailus
2020-12-07 21:15 ` [PATCH 15/24] ccs: Don't change the I²C address just for software reset Sakari Ailus
2020-12-07 21:15 ` [PATCH 16/24] ccs: Only do software reset if we have no hardware reset Sakari Ailus
2020-12-07 21:15 ` [PATCH 17/24] ccs: Wait until software reset is done Sakari Ailus
2021-01-12 16:49 ` Mauro Carvalho Chehab
2021-01-12 17:12 ` Sakari Ailus
2020-12-07 21:15 ` [PATCH 18/24] ccs: Hardware requires a delay after starting the clock of lifting reset Sakari Ailus
2020-12-07 21:15 ` [PATCH 19/24] ccs: Add a sanity check for external clock frequency Sakari Ailus
2020-12-07 21:15 ` [PATCH 20/24] ccs: Support and default to auto PHY control Sakari Ailus
2020-12-07 21:15 ` [PATCH 21/24] Documentation: Include CCS PLL calculator to CCS driver documentation Sakari Ailus
2020-12-07 21:15 ` [PATCH 22/24] ccs-pll: Switch from standard integer types to kernel ones Sakari Ailus
2020-12-07 21:15 ` [PATCH 23/24] ccs: " Sakari Ailus
2020-12-07 21:15 ` [PATCH 24/24] Revert "media: ccs-pll: Fix MODULE_LICENSE" Sakari Ailus
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