linux-kernel - Re: [PATCH v7 0/7] Add support for XLCDC to sam9x7 SoC family.

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Message-ID: <5bb79c47-d378-4a3e-a7cf-c577d3e86ec2@microchip.com>
Date:   Wed, 18 Oct 2023 09:26:10 +0000
From:   <Manikandan.M@...rochip.com>
To:     <sam@...nborg.org>, <bbrezillon@...nel.org>, <airlied@...il.com>,
        <daniel@...ll.ch>, <Nicolas.Ferre@...rochip.com>,
        <alexandre.belloni@...tlin.com>, <lee@...nel.org>,
        <dri-devel@...ts.freedesktop.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
CC:     <Hari.PrasathGE@...rochip.com>,
        <Balamanikandan.Gunasundar@...rochip.com>,
        <Durai.ManickamKR@...rochip.com>, <Nayabbasha.Sayed@...rochip.com>,
        <Dharma.B@...rochip.com>, <Varshini.Rajendran@...rochip.com>,
        <Balakrishnan.S@...rochip.com>
Subject: Re: [PATCH v7 0/7] Add support for XLCDC to sam9x7 SoC family.

On 05/10/23 2:59 pm, Manikandan Muralidharan wrote:
> This patch series aims to add support for XLCDC IP of sam9x7 SoC family
> to the DRM subsystem.XLCDC IP has additional registers and new
> configuration bits compared to the existing register set of HLCDC IP.
> The new compatible string "microchip,sam9x75-xlcdc" is defined for sam9x75
> variant of the sam9x7 SoC family.The is_xlcdc flag under driver data and
> IP specific driver ops helps to differentiate the XLCDC and existing HLCDC
> code within the same driver.
> 
Hi All,

I would appreciate any additional insights you may have on the recent 
changes in this version.

> changes in v7:
> * LCDC IP driver ops functions are declared static and its
> declaration are removed.
> 
> changes in v6:
> * Fixed Cosmetic defects.
> * Added comments for readability.
> 
> changes in v5:
> * return value of regmap_read_poll_timeout is checked in failure
> case.
> * HLCDC and XLCDC specific driver functions are now invoked
> using its IP specific driver ops w/o the need of checking is_xlcdc flag.
> * Removed empty spaces and blank lines.
> 
> changes in v4:
> * fixed kernel warnings reported by kernel test robot.
> 
> changes in v3:
> * Removed de-referencing the value of is_xlcdc flag multiple times in
> a single function.
> * Removed cpu_relax() call when using regmap_read_poll_timeout.
> * Updated xfactor and yfactor equations using shift operators
> * Defined CSC co-efficients in an array for code readability.
> 
> changes in v2:
> * Change the driver compatible name from "microchip,sam9x7-xlcdc" to
> "microchip,sam9x75-xlcdc".
> * Move is_xlcdc flag to driver data.
> * Remove unsed Macro definitions.
> * Add co-developed-bys tags
> * Replace regmap_read() with regmap_read_poll_timeout() call
> * Split code into two helpers for code readablitity.
> 
> Durai Manickam KR (1):
>    drm: atmel-hlcdc: Define SAM9X7 SoC XLCDC specific registers
> 
> Manikandan Muralidharan (6):
>    drm: atmel-hlcdc: add flag and driver ops to differentiate XLCDC and
>      HLCDC IP
>    drm: atmel-hlcdc: add LCD controller layer definition for sam9x75
>    drm: atmel_hlcdc: Add support for XLCDC in atmel LCD driver
>    drm: atmel-hlcdc: add DPI mode support for XLCDC
>    drm: atmel-hlcdc: add vertical and horizontal scaling support for
>      XLCDC
>    drm: atmel-hlcdc: add support for DSI output formats
> 
>   .../gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c    | 175 +++++++--
>   drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c  | 105 +++++
>   drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h  |  86 ++++
>   .../gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c   | 369 +++++++++++++++---
>   include/linux/mfd/atmel-hlcdc.h               |  10 +
>   5 files changed, 647 insertions(+), 98 deletions(-)
> 

-- 
Thanks and Regards,
Manikandan M.