[PATCH 0/5] media: rkisp1: Fix LSC initial configuration on i.MX8MP

[Laurent Pinchart]

Hi Dafna,

On Fri, Sep 02, 2022 at 12:07:04PM +0300, Dafna Hirschfeld wrote:
> On 17.08.2022 05:18, Laurent Pinchart wrote:
> > Hello,
> > 
> > This patch series fixes the Lens Shading Correction initial
> > configuration on the i.MX8MP.
> > 
> > The i.MX8MP integrates an ISP8000Nano v18.02, which unlike other
> > versions currently supported by the driver, gates access to the LSC RAM
> > with the ISP_CTRL.ISP_ENABLE bit. The initial LSC configuration being
> > performed before the ISP gets enabled, the writes to the RAM are
> > ignored, leading to incorrect results.
> > 
> > The series starts with four small drive-by cleanups of the LSC code, and
> > patch 5/5 then fixes the issue. I'm not totally thrilled by the code
> > architecture, but I'm not sure why, and I have a feeling doing better
> > would require a large refactoring of the ISP parameters handling. If
> > anyone sees an option for a better implementation, please say so.
> > 
> > The series is based on top of "[PATCH 0/7] media: rkisp1: Fix and
> > improve color space support" ([1]). Reviews for that base series would
> > thus be appreciated too.
> > 
> > [1] https://lore.kernel.org/linux-media/20220815065235.23797-1-laurent.pinchart@ideasonboard.com
> 
> Hi, I see that the series is also based on "[PATCH v2 00/55] media: rkisp1: Cleanups and add support"
> right? I could not apply patch 5/5 because it seems to sit on top of
> '[PATCH v2 49/55] media: rkisp1: Configure gasket on i.MX8MP'
> Do you have a branch you can share with all the sets?

Sure. You can find all pending patches for the rkisp1 at
https://gitlab.com/ideasonboard/nxp/linux/-/tree/pinchartl/v6.0/isp.
Commits up to and including "media: rkisp1: Zero v4l2_subdev_format
fields in when validating links" are candidates for v6.1, commits
starting at "dt-bindings: media: rkisp1: Add i.MX8MP ISP to compatible"
need some more work.

> > Laurent Pinchart (5):
> >   media: rkisp1: Clean up LSC configuration code
> >   media: rkisp1: Store LSC register values in u32 variables
> >   media: rkisp1: Simplify LSC x/y size and grad register macros
> >   media: rkisp1: Use RKISP1_CIF_ISP_LSC_GRAD_SIZE() for gradient
> >     registers
> >   media: rkisp1: Configure LSC after enabling the ISP
> > 
> >  .../platform/rockchip/rkisp1/rkisp1-common.h  |  29 +-
> >  .../platform/rockchip/rkisp1/rkisp1-isp.c     |   9 +-
> >  .../platform/rockchip/rkisp1/rkisp1-params.c  | 378 ++++++++++--------
> >  .../platform/rockchip/rkisp1/rkisp1-regs.h    |  20 +-
> >  4 files changed, 239 insertions(+), 197 deletions(-)

-- 
Regards,

Laurent Pinchart