[PATCH v6 drm-dp 1/5] drm/hisilicon/hibmc: add dp aux in hibmc

[Dmitry Baryshkov]

On Mon, Dec 02, 2024 at 09:13:18PM +0800, Yongbang Shi wrote:
> From: baihan li <libaihan at huawei.com>
> 
> Add dp aux read/write functions. They are basic functions
> and will be used later.
> 
> Signed-off-by: Baihan Li <libaihan at huawei.com>
> Signed-off-by: Yongbang Shi <shiyongbang at huawei.com>
> ---
> ChangeLog:
> v5 -> v6:
>   - adding do{} while(0) in macro defination function, suggested by Dmitry Baryshkov.
> v4 -> v5:
>   - fixing build errors reported by kernel test robot <lkp at intel.com>
>     Closes: https://lore.kernel.org/oe-kbuild-all/202411131438.RZWYrWTE-lkp@intel.com/
> v3 -> v4:
>   - retun error codes in  result incorrect branch, suggested by Dmitry Baryshkov.
>   - replacing all ret= with returns, suggested by Dmitry Baryshkov.
>   - moving the comment below the judgment statement, suggested by Dmitry Baryshkov.
>   - moving definations to the source file and clearing headers, suggested by Dmitry Baryshkov.
>   - reanaming dp_prefix to hibmc_dp_prefix, suggested by Dmitry Baryshkov.
>   - changing hibmc_dp_reg_write_field to static inline and lock, suggested by Dmitry Baryshkov.
>   - moving some structs to later patch, suggested by Dmitry Baryshkov.
> v2 -> v3:
>   - put the macro definations in latter patch where they are actually used, suggested by Dmitry Baryshkov.
>   - rename some macro definations to make them sensible, suggested by Dmitry Baryshkov.
>   - using FIELD_PREP and FIELD_GET, suggested by Dmitry Baryshkov.
>   - using DP_DPCD_REV_foo, suggested by Dmitry Baryshkov.
>   - fix build errors reported by kernel test robot <lkp at intel.com>
>     Closes: https://lore.kernel.org/oe-kbuild-all/202410250305.UHKDhtxy-lkp@intel.com/
> v1 -> v2:
>   - using drm_dp_aux frame implement dp aux read and write functions, suggested by Jani Nikula.
>   - using drm dp header files' dp macros instead, suggested by Andy Yan.
>   v1:https://lore.kernel.org/all/20240930100610.782363-1-shiyongbang@huawei.com/
> ---
>  drivers/gpu/drm/hisilicon/hibmc/Makefile     |   3 +-
>  drivers/gpu/drm/hisilicon/hibmc/dp/dp_aux.c  | 164 +++++++++++++++++++
>  drivers/gpu/drm/hisilicon/hibmc/dp/dp_comm.h |  42 +++++
>  drivers/gpu/drm/hisilicon/hibmc/dp/dp_reg.h  |  27 +++
>  4 files changed, 235 insertions(+), 1 deletion(-)
>  create mode 100644 drivers/gpu/drm/hisilicon/hibmc/dp/dp_aux.c
>  create mode 100644 drivers/gpu/drm/hisilicon/hibmc/dp/dp_comm.h
>  create mode 100644 drivers/gpu/drm/hisilicon/hibmc/dp/dp_reg.h
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>

-- 
With best wishes
Dmitry