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RE: fsl-dcu not works on latest "drm-next"

From Meng Yi <meng.yi@nxp.com>
Newsgroups linux.kernel
Subject RE: fsl-dcu not works on latest "drm-next"
Date 2016-05-25 12:00 +0200
Message-ID <rCDLB-7RB-39@gated-at.bofh.it> (permalink)
References <rCxZw-4k1-33@gated-at.bofh.it> <rCxZw-4k1-31@gated-at.bofh.it> <rCD8R-7EH-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

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Hi Mark,

> 
> Without any description of the problem it is difficult to comment.
> There were some drivers that were abusing the API by hacking round things
> that need fixing (the main one I've seen is reporting things as big endian
> instead of native endian to cause two layers of translation to kick in) and one
> that was trying to use regmap to represent something that just fundamentally
> wasn't a regmap so *any* change in regmap internals was risky.

I was testing HDMI patches on latest "drm-next" branch, and found that it is not work.
And then I found the base tree was not working too. Then I debugged the base tree.

I read out the value of relevant register using "CodeWarrior TAP", find that endianness is not right.

Then I changed endianness of the value to be written that using " regmap_write" . It works.
But "regmap_update_bits" still have the problem.

I had checked log of regmap, and didn't find which commit caused that.

I am not familiar with regmap, can you give some advices?

Thanks,
Best Regards,
Meng Yi

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Thread

RE: fsl-dcu not works on latest "drm-next" Meng Yi <meng.yi@nxp.com> - 2016-05-25 05:50 +0200
  RE: fsl-dcu not works on latest "drm-next" Stefan Agner <stefan@agner.ch> - 2016-05-25 08:30 +0200
    Re: fsl-dcu not works on latest "drm-next" Alexander Stein <alexander.stein@systec-electronic.com> - 2016-05-25 10:40 +0200
      RE: fsl-dcu not works on latest "drm-next" Meng Yi <meng.yi@nxp.com> - 2016-05-25 11:00 +0200
        Re: fsl-dcu not works on latest "drm-next" Alexander Stein <alexander.stein@systec-electronic.com> - 2016-05-25 12:00 +0200
          RE: fsl-dcu not works on latest "drm-next" Meng Yi <meng.yi@nxp.com> - 2016-05-25 12:30 +0200
            Re: fsl-dcu not works on latest "drm-next" Alexander Stein <alexander.stein@systec-electronic.com> - 2016-05-25 14:20 +0200
              RE: fsl-dcu not works on latest "drm-next" Meng Yi <meng.yi@nxp.com> - 2016-05-26 10:20 +0200
                Re: fsl-dcu not works on latest "drm-next" Alexander Stein <alexander.stein@systec-electronic.com> - 2016-05-26 11:20 +0200
  Re: fsl-dcu not works on latest "drm-next" Mark Brown <broonie@kernel.org> - 2016-05-25 11:20 +0200
    RE: fsl-dcu not works on latest "drm-next" Meng Yi <meng.yi@nxp.com> - 2016-05-25 12:00 +0200
      Re: fsl-dcu not works on latest "drm-next" Mark Brown <broonie@kernel.org> - 2016-05-25 12:50 +0200
        RE: fsl-dcu not works on latest "drm-next" Meng Yi <meng.yi@nxp.com> - 2016-05-26 10:40 +0200
          Re: fsl-dcu not works on latest "drm-next" Alexander Stein <alexander.stein@systec-electronic.com> - 2016-05-26 11:20 +0200
            Re: fsl-dcu not works on latest "drm-next" Stefan Agner <stefan@agner.ch> - 2016-05-27 08:00 +0200
              Re: fsl-dcu not works on latest "drm-next" Mark Brown <broonie@kernel.org> - 2016-05-27 14:30 +0200
                Re: fsl-dcu not works on latest "drm-next" Stefan Agner <stefan@agner.ch> - 2016-05-27 19:50 +0200
                Re: fsl-dcu not works on latest "drm-next" Mark Brown <broonie@kernel.org> - 2016-05-27 22:00 +0200

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