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From: Sowjanya Komatineni <skomatineni@nvidia.com>
To: <skomatineni@nvidia.com>, <thierry.reding@gmail.com>,
	<jonathanh@nvidia.com>, <frankc@nvidia.com>, <hverkuil@xs4all.nl>,
	<sakari.ailus@iki.fi>, <robh+dt@kernel.org>,
	<helen.koike@collabora.com>
Cc: <digetx@gmail.com>, <sboyd@kernel.org>,
	<gregkh@linuxfoundation.org>, <linux-media@vger.kernel.org>,
	<devicetree@vger.kernel.org>, <linux-tegra@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>, <linux-i2c@vger.kernel.org>
Subject: [RFC PATCH v5 06/14] media: tegra-video: Fix channel format alignment
Date: Mon, 27 Jul 2020 13:57:24 -0700
Message-ID: <1595883452-17343-7-git-send-email-skomatineni@nvidia.com> (raw)
In-Reply-To: <1595883452-17343-1-git-send-email-skomatineni@nvidia.com>

Pixel format width is mistakenly aligned to surface align bytes
and altering width to aligned value may force sensor mode change
other than the requested one and also cause mismatch in width
programmed between sensor and vi which can lead to capture errors.

This patch removes width alignment and clamps width as per Tegra
minimum and maximum limits.

Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
---
 drivers/staging/media/tegra-video/vi.c | 16 +++-------------
 1 file changed, 3 insertions(+), 13 deletions(-)

diff --git a/drivers/staging/media/tegra-video/vi.c b/drivers/staging/media/tegra-video/vi.c
index 1b5e660..d621ebc 100644
--- a/drivers/staging/media/tegra-video/vi.c
+++ b/drivers/staging/media/tegra-video/vi.c
@@ -359,25 +359,15 @@ static void tegra_channel_fmt_align(struct tegra_vi_channel *chan,
 				    struct v4l2_pix_format *pix,
 				    unsigned int bpp)
 {
-	unsigned int align;
-	unsigned int min_width;
-	unsigned int max_width;
-	unsigned int width;
 	unsigned int min_bpl;
 	unsigned int max_bpl;
 	unsigned int bpl;
 
 	/*
-	 * The transfer alignment requirements are expressed in bytes. Compute
-	 * minimum and maximum values, clamp the requested width and convert
-	 * it back to pixels. Use bytesperline to adjust the width.
+	 * The transfer alignment requirements are expressed in bytes.
+	 * Clamp the requested width and height to the limits.
 	 */
-	align = lcm(SURFACE_ALIGN_BYTES, bpp);
-	min_width = roundup(TEGRA_MIN_WIDTH, align);
-	max_width = rounddown(TEGRA_MAX_WIDTH, align);
-	width = roundup(pix->width * bpp, align);
-
-	pix->width = clamp(width, min_width, max_width) / bpp;
+	pix->width = clamp(pix->width, TEGRA_MIN_WIDTH, TEGRA_MAX_WIDTH);
 	pix->height = clamp(pix->height, TEGRA_MIN_HEIGHT, TEGRA_MAX_HEIGHT);
 
 	/* Clamp the requested bytes per line value. If the maximum bytes per
-- 
2.7.4


  parent reply index

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-27 20:57 [RFC PATCH v5 00/14] Support for Tegra video capture from external sensor Sowjanya Komatineni
2020-07-27 20:57 ` [RFC PATCH v5 01/14] i2c: tegra: Don't mark VI I2C as IRQ safe runtime PM Sowjanya Komatineni
2020-07-28 16:33   ` Wolfram Sang
2020-07-27 20:57 ` [RFC PATCH v5 02/14] i2c: tegra: Remove NULL pointer check before clk_enable/disable/prepare/unprepare Sowjanya Komatineni
2020-07-28 16:33   ` Wolfram Sang
2020-07-27 20:57 ` [RFC PATCH v5 03/14] i2c: tegra: Fix the error path in tegra_i2c_runtime_resume Sowjanya Komatineni
2020-07-28 16:33   ` Wolfram Sang
2020-07-27 20:57 ` [RFC PATCH v5 04/14] i2c: tegra: Fix runtime resume to re-init VI I2C Sowjanya Komatineni
2020-07-28 16:33   ` Wolfram Sang
2020-07-27 20:57 ` [RFC PATCH v5 05/14] i2c: tegra: Avoid tegra_i2c_init_dma() for Tegra210 vi i2c Sowjanya Komatineni
2020-07-28 16:34   ` Wolfram Sang
2020-07-27 20:57 ` Sowjanya Komatineni [this message]
2020-07-27 20:57 ` [RFC PATCH v5 07/14] media: tegra-video: Enable TPG based on kernel config Sowjanya Komatineni
2020-07-27 20:57 ` [RFC PATCH v5 08/14] media: tegra-video: Update format lookup to offset based Sowjanya Komatineni
2020-07-27 20:57 ` [RFC PATCH v5 09/14] dt-bindings: tegra: Update VI and CSI bindings with port info Sowjanya Komatineni
2020-07-27 20:57 ` [RFC PATCH v5 10/14] media: tegra-video: Add support for external sensor capture Sowjanya Komatineni
2020-07-27 20:57 ` [RFC PATCH v5 11/14] media: tegra-video: Add support for selection ioctl ops Sowjanya Komatineni
2020-07-27 20:57 ` [RFC PATCH v5 12/14] gpu: host1x: mipi: Keep MIPI clock enabled till calibration is done Sowjanya Komatineni
2020-07-28 11:03   ` Dmitry Osipenko
2020-07-28 16:04     ` Sowjanya Komatineni
2020-07-29 17:08       ` Dmitry Osipenko
2020-07-29 17:55         ` Sowjanya Komatineni
2020-07-29 23:42           ` Dmitry Osipenko
2020-07-29 23:54             ` Sowjanya Komatineni
2020-07-30  0:31               ` Dmitry Osipenko
2020-07-27 20:57 ` [RFC PATCH v5 13/14] media: tegra-video: Add CSI MIPI pads calibration Sowjanya Komatineni
2020-07-28 10:30   ` Dmitry Osipenko
2020-07-28 15:59     ` Sowjanya Komatineni
2020-07-28 19:43       ` Sowjanya Komatineni
2020-07-29 23:25       ` Dmitry Osipenko
2020-07-29 23:59         ` Sowjanya Komatineni
2020-07-30  0:27           ` Sowjanya Komatineni
2020-07-30  0:43             ` Dmitry Osipenko
2020-07-30  0:52               ` Sowjanya Komatineni
2020-07-30  0:55                 ` Sowjanya Komatineni
2020-07-30  0:53                   ` Dmitry Osipenko
2020-07-30  1:06                     ` Sowjanya Komatineni
2020-07-30  1:10                       ` Dmitry Osipenko
2020-07-30  0:47             ` Sowjanya Komatineni
2020-07-27 20:57 ` [RFC PATCH v5 14/14] media: tegra-video: Compute settle times based on the clock rate Sowjanya Komatineni

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