diff mbox series

[v2,036/106] ccs: Stop reading arrays after the first zero

Message ID	20201007084557.25843-29-sakari.ailus@linux.intel.com
State	Superseded
Headers	show Return-Path: <SRS0=q2TO=DO=vger.kernel.org=linux-media-owner@kernel.org> From: Sakari Ailus <sakari.ailus@linux.intel.com> To: linux-media@vger.kernel.org Subject: [PATCH v2 036/106] ccs: Stop reading arrays after the first zero Date: Wed, 7 Oct 2020 11:44:49 +0300 Message-Id: <20201007084557.25843-29-sakari.ailus@linux.intel.com> In-Reply-To: <20201007084557.25843-1-sakari.ailus@linux.intel.com> References: <20201007084505.25761-1-sakari.ailus@linux.intel.com> <20201007084557.25843-1-sakari.ailus@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	None \| expand [v2,002/106] smiapp: Use CCS register flags [v2,004/106] smiapp: Remove macros for defining registers, merge definitions [v2,009/106] smiapp: Obtain frame descriptor from CCS limits [v2,011/106] smiapp: Use CCS limits in reading binning capabilities [v2,013/106] smiapp: Remove quirk function for writing a single 8-bit register [v2,014/106] smiapp: Rename register access functions [v2,015/106] smiapp: Internal rename to CCS [v2,016/106] smiapp: Differentiate CCS sensors from SMIA in subdev naming [v2,019/106] ccs: Give all subdevs a function [v2,027/106] ccs: Request for "reset" GPIO [v2,029/106] ccs: Remove the I²C ID table [v2,032/106] ccs: Fix obtaining bus information from firmware [v2,033/106] ccs: Add CCS static data parser library [v2,034/106] ccs: Combine revision number major and minor into one [v2,036/106] ccs: Stop reading arrays after the first zero [v2,039/106] ccs: Refactor register reading a little [v2,040/106] ccs: Make real to integer number conversion optional [v2,041/106] ccs: Move limit value real to integer conversion from read to access time [v2,043/106] smiapp-pll: Rename as ccs-pll [v2,020/106] dt-bindings: nokia,smia: Fix link-frequencies documentation [v2,044/106] ccs-pll: Fix MODULE_LICENSE [v2,021/106] dt-bindings: nokia,smia: Make vana-supply optional [v2,023/106] dt-bindings: nokia,smia: Convert to YAML [v2,049/106] ccs: Wrap long lines, unwrap short ones [v2,025/106] dt-bindings: nokia,smia: Amend SMIA bindings with MIPI CCS support [v2,050/106] ccs: Add device compatible identifiers for telling SMIA and CCS apart [v2,053/106] dt-bindings: mipi,ccs: Don't mention vana voltage [v2,052/106] ccs: Remove unnecessary delays from power-up sequence [v2,055/106] ccs: Use all regulators [v2,058/106] ccs-pll: Use correct VT divisor for calculating VT SYS divisor [v2,059/106] ccs-pll: End search if there are no better values available [v2,061/106] ccs-pll: Differentiate between CSI-2 D-PHY and C-PHY [v2,063/106] ccs-pll: Document the structs in the header as well as the function [v2,067/106] ccs-pll: Avoid overflow in pre-PLL divisor lower bound search [v2,074/106] ccs-pll: Add support for extended input PLL clock divider [v2,075/106] ccs-pll: Support two cycles per pixel on OP domain [v2,076/106] ccs-pll: Add support flexible OP PLL pixel clock divider [v2,077/106] ccs-pll: Add sanity checks [v2,079/106] ccs-pll: Split off VT subtree calculation [v2,083/106] ccs-pll: Rework bounds checks [v2,085/106] ccs-pll: Fix VT post-PLL divisor calculation [v2,086/106] ccs-pll: Separate VT divisor limit calculation from the rest [v2,087/106] ccs-pll: Add trivial dual PLL support [v2,088/106] ccs: Dual PLL support [v2,091/106] ccs: Print written register values [v2,093/106] ccs: Add support for obtaining C-PHY configuration from firmware [v2,094/106] ccs: Add digital gain support [v2,096/106] ccs: Remove analogue gain field [v2,097/106] ccs: Only add analogue gain control if the device supports it [v2,098/106] v4l: uapi: Add user control base for CCS controls [v2,099/106] v4l: uapi: ccs: Add controls for analogue gain constants [v2,101/106] v4l: uapi: ccs: Add controls for CCS alternative analogue gain [v2,105/106] ccs: Add shading correction and luminance correction level controls

Commit Message

Sakari Ailus Oct. 7, 2020, 8:44 a.m. UTC

The register arrays have a certain size but not all the entries will be
relevant. In practice reading can be stopped after encountering a zero
value in the array. Do that to avoid extra reads.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
 drivers/media/i2c/ccs/ccs-core.c | 3 +++
 1 file changed, 3 insertions(+)

diff mbox series

Patch

diff --git a/drivers/media/i2c/ccs/ccs-core.c b/drivers/media/i2c/ccs/ccs-core.c
index 0cc6e7423f26..963f945ceaf0 100644
--- a/drivers/media/i2c/ccs/ccs-core.c
+++ b/drivers/media/i2c/ccs/ccs-core.c
@@ -193,6 +193,9 @@  static int ccs_read_all_limits(struct ccs_sensor *sensor)
 				goto out_err;
 			}
 
+			if (!val && j)
+				break;
+
 			ccs_assign_limit(ptr, width, val);
 
 			dev_dbg(&client->dev, "0x%8.8x \"%s\" = %u, 0x%x\n",