linux-kernel - [PATCH v13 0/1] media: i2c: imx334: support lower bandwidth mode

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Message-ID: <20230414123311.23923-1-shravan.chippa@microchip.com>
Date:   Fri, 14 Apr 2023 18:03:10 +0530
From:   shravan kumar <shravan.chippa@...rochip.com>
To:     <paul.j.murphy@...el.com>, <daniele.alessandrelli@...el.com>,
        <mchehab@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <shawnguo@...nel.org>,
        <s.hauer@...gutronix.de>
CC:     <kernel@...gutronix.de>, <festevam@...il.com>, <linux-imx@....com>,
        <linux-media@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <shravan.chippa@...rochip.com>, Jacopo Mondi <jacopo@...ndi.org>,
        "Sakari Ailus" <sakari.ailus@....fi>
Subject: [PATCH v13 0/1] media: i2c: imx334: support lower bandwidth mode

From: Shravan Chippa <shravan.chippa@...rochip.com>

Hi

This patch series is for imx334 sensor driver support for lower bandwidth

Some platforms may not be capable of supporting the bandwidth
required for 12 bit or 3840x2160@60 resolutions.

Add support for dynamically selecting 10 bit and 1920x1080@30
resolutions.

V12 -> V13
dropped 4 applied patches (ref link: https://git.linuxtv.org/mchehab/media-next.git/log/)

patch 5 changes:
compilation error removed
updated hblank value while changing the modes

V11 -> V12
Update default link frequency from device tree max link
frequency value.
Update init_cfg() function to update the link frequency
menu_skip_mask value.

V10 -> V11
Changed veriable type int to unsigned int
Updated CC list

V10 -> V10
PATCH RESEND with updated CC list

V9 -> V10
Added new dt-binding patch
added support for handling multiple link-frequncy
minor changes on coding style

V8 -> V9
-Updated all array values with samall later to get unifamity
in mode array values
-corrected hblank_min, hbalank, pix_clk for 1920x1080@30 updated 
according to link frequency
-corrected mutex use for imx334_get_format_code function 
-corrected the fmt->format.code value assinment
-in function imx334_get_format_code variable "i" value comparision
corrected

V7 -> V8
-patch drop "mimx334-odify-link-frequency" as per the commnets
linkfrquncy will be half of the line bandwidth

-changed 1920x1080@30 mode link frequency from (891000000Mbps) 
to (445500000Mbps). linkfrquncy will be half of the line bandwidth

V6 -> V7
Reloved: kernel test robot warning
"drivers/media/i2c/imx334.c:767:15: warning: unused variable 'i' "

V5 -> V6
-Drop the dt-binding patch
-Optimize the code to avoid duplicating the lines
-Added proper mutex while imx334_mbus_codes array
-Modified Function __v4l2_ctrl_modify_range arguments as per the review
commants
-Added hblank dummy set ctrl
-Removed Redundant comment
-corrected code alignment 
-All commit msgs are re-written

V4 -> V5
-Added 5 more patchs as per the review comments witch has below updates
-Updated 1782000000Mbps link frequency for 3840x2160@60 as per the mode
values
-Updated 1782000000Mbps link frequency in dt-bindings also
-Updated 3840x2160@60 mode array with default(reset) values

-Updated hblank __v4l2_ctrl_s_ctrl() to __v4l2_ctrl_modify_range()
Suggested-by: Jacopo Mondi <jacopo@...ndi.org>

-Current mode update only when we try to set V4L2_SUBDEV_FORMAT_ACTIVE
-Added link frequency (891000000Mbps) and pixel rate (74250000) to
1920x1080@30 mode
Suggested-by: Sakari Ailus <sakari.ailus@....fi>

-Updated commit message

V3 -> V4
- Make the 12 bit and 3840x2160 as default
- Set bus code SRGGB12 if set format fails

V2 -> V3
- Fixed the warning reported by kernel test robot

V1 -> V2
- Addressed the review comment given by Jacopo Mondi,
  Which has bug in imx334_enum_frame_size() loop function,
- Renamed array codes[] to imx334_mbus_codes[]

Shravan Chippa (1):
  media: i2c: imx334: update pixel, hblank and link frequency

 drivers/media/i2c/imx334.c | 62 +++++++++++++++++++++++++++++---------
 1 file changed, 48 insertions(+), 14 deletions(-)

-- 
2.34.1