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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
To: paul.j.murphy@intel.com, daniele.alessandrelli@intel.com,
	linux-media@vger.kernel.org
Cc: Dave Stevenson <dave.stevenson@raspberrypi.com>
Subject: [PATCH 06/16] media: i2c: ov9282: Correct HTS register for configured pixel rate
Date: Wed,  5 Oct 2022 16:27:59 +0100	[thread overview]
Message-ID: <20221005152809.3785786-7-dave.stevenson@raspberrypi.com> (raw)
In-Reply-To: <20221005152809.3785786-1-dave.stevenson@raspberrypi.com>

The calculations from pixel rate, width+hblank, and height+vblank
do not give the correct framerate - it's half the speed it should
be.

Whilst not documented as such, the TIMING_HTS register (0x380c/d)
appears to be in units of 2 pixels.
The default is 0x2d8 (728) which can not be valid as-is when the
frame is 1280 active pixels wide. Doubling to 0x5b0 (1456) results
in the correct timings.

This driver isn't using the default frame width + hblank, so
use 0x02fd which is half of the width of 1280 and hblank of 250
which is reported to userspace. With this the frame rate calculations
work correctly.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
 drivers/media/i2c/ov9282.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/media/i2c/ov9282.c b/drivers/media/i2c/ov9282.c
index f7823d584522..1cd6cb4addfb 100644
--- a/drivers/media/i2c/ov9282.c
+++ b/drivers/media/i2c/ov9282.c
@@ -242,8 +242,8 @@ static const struct ov9282_reg mode_1280x720_regs[] = {
 	{0x3809, 0x00},
 	{0x380a, 0x02},
 	{0x380b, 0xd0},
-	{0x380c, 0x05},
-	{0x380d, 0xfa},
+	{0x380c, 0x02},
+	{0x380d, 0xfd},
 	{0x3810, 0x00},
 	{0x3811, 0x08},
 	{0x3812, 0x00},
-- 
2.34.1


  parent reply	other threads:[~2022-10-05 15:28 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-10-05 15:27 [PATCH 00/16] Updates to ov9282 sensor driver Dave Stevenson
2022-10-05 15:27 ` [PATCH 01/16] media: i2c: ov9282: Remove duplication of registers Dave Stevenson
2022-10-06  9:14   ` Jacopo Mondi
2022-10-05 15:27 ` [PATCH 02/16] media: i2c: ov9282: Split registers into common and mode specific Dave Stevenson
2022-10-06  9:15   ` Jacopo Mondi
2022-10-05 15:27 ` [PATCH 03/16] media: i2c: ov9282: Remove format code from the mode Dave Stevenson
2022-10-06  9:15   ` Jacopo Mondi
2022-10-05 15:27 ` [PATCH 04/16] media: i2c: ov9282: Remove pixel rate from mode definition Dave Stevenson
2022-10-06  9:17   ` Jacopo Mondi
2022-10-06 11:51     ` Dave Stevenson
2022-10-05 15:27 ` [PATCH 05/16] media: i2c: ov9281: Support more than 1 mode Dave Stevenson
2022-10-06  9:18   ` Jacopo Mondi
2022-10-26  7:22   ` Sakari Ailus
2022-10-05 15:27 ` Dave Stevenson [this message]
2022-10-06  9:23   ` [PATCH 06/16] media: i2c: ov9282: Correct HTS register for configured pixel rate Jacopo Mondi
2022-10-06 13:01     ` Dave Stevenson
2022-10-05 15:28 ` [PATCH 07/16] media: i2c: ov9282: Reduce vblank_min values based on testing Dave Stevenson
2022-10-06 11:56   ` Jacopo Mondi
2022-10-06 13:02     ` Dave Stevenson
2022-10-05 15:28 ` [PATCH 08/16] media: i2c: ov9282: Add selection for CSI2 clock mode Dave Stevenson
2022-10-06  9:24   ` Jacopo Mondi
2022-10-26  7:21   ` Sakari Ailus
2022-10-28 12:57     ` Dave Stevenson
2022-10-28 14:30       ` Sakari Ailus
2022-10-28 15:03         ` Dave Stevenson
2022-10-31 13:06           ` Sakari Ailus
2022-10-05 15:28 ` [PATCH 09/16] media: i2c: ov9282: Add the properties from fwnode Dave Stevenson
2022-10-06 11:57   ` Jacopo Mondi
2022-10-05 15:28 ` [PATCH 10/16] media: i2c: ov9282: Action CID_VBLANK when set Dave Stevenson
2022-10-06  9:29   ` Jacopo Mondi
2022-10-06 13:21     ` Dave Stevenson
2022-10-05 15:28 ` [PATCH 11/16] media: i2c: ov9282: Add HFLIP and VFLIP support Dave Stevenson
2022-10-06  9:38   ` Jacopo Mondi
2022-10-06 14:21     ` Dave Stevenson
2022-10-05 15:28 ` [PATCH 12/16] media: i2c: ov9282: Make V4L2_CID_HBLANK r/w Dave Stevenson
2022-10-06  9:41   ` Jacopo Mondi
2022-10-06 11:33     ` Dave Stevenson
2022-10-06 11:53       ` Jacopo Mondi
2022-10-05 15:28 ` [PATCH 13/16] media: i2c: ov9282: Add selection API calls for cropping info Dave Stevenson
2022-10-06  9:43   ` Jacopo Mondi
2022-10-06 11:39     ` Dave Stevenson
2022-10-06 11:54       ` Jacopo Mondi
2022-10-05 15:28 ` [PATCH 14/16] media: i2c: ov9282: Add support for 1280x800 and 640x400 modes Dave Stevenson
2022-10-06  9:48   ` Jacopo Mondi
2022-10-06 11:46     ` Dave Stevenson
2022-10-05 15:28 ` [PATCH 15/16] media: i2c: ov9282: Add support for 8bit readout Dave Stevenson
2022-10-06  9:57   ` Jacopo Mondi
2022-10-06 12:20     ` Dave Stevenson
2022-10-05 15:28 ` [PATCH 16/16] media: i2c: ov9282: Support event handlers Dave Stevenson
2022-10-06  9:59   ` Jacopo Mondi
2022-10-07 10:22     ` Dave Stevenson
2022-10-07 12:57       ` Jacopo Mondi

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