[PATCH] fix green/pink color distortion from HDR set during vendor Uboot

[Neil Armstrong]

On 19/04/2021 16:50, Neil Armstrong wrote:
> Hi,
> 
> Thanks for looking at this !
> 
> The subject should be :
> "drm/meson: fix green/pink color distortion from HDR set during vendor Uboot"
> 
> On 19/04/2021 16:33, Mathias Steiger wrote:
>>
>> I also wrote a program to set this via /dev/mem from user space: https://github.com/ballerburg9005/android-tvbox-2-linux-pc-and-server/blob/main/fix_greenpink.c .
>>
>>
> 
> Please explicit here what the patch does, no need for the example program, the patch is self explicit.
> 
> Then add:
> 
> Fixes: 728883948b0d ("drm/meson: Add G12A Support for VIU setup")

I tested on a VIM3 with the vendor U-boot, and it works ! Thanks !

And please add to the v2 patch:
Tested-by: Neil Armstrong <narmstrong at baylibre.com>

Thanks,
Neil

> 
> Finally, it also needs your sign-off at the end of your commit message, simply commit with "-s".
> 
> 
>>
>> diff --git a/drivers/gpu/drm/meson/meson_drv.c b/drivers/gpu/drm/meson/meson_drv.c
>> index 453d8b4c5..7d929b5b2 100644
>> --- a/drivers/gpu/drm/meson/meson_drv.c
>> +++ b/drivers/gpu/drm/meson/meson_drv.c
>> @@ -308,6 +308,10 @@ static int meson_drv_bind_master(struct device *dev, bool has_components)
>>         drm->mode_config.funcs = &meson_mode_config_funcs;
>>         drm->mode_config.helper_private = &meson_mode_config_helpers;
>>
>> +       /* undo settings made in vendor Uboot */
>> +
>> +       writel_bits_relaxed(15 << 13, 0, priv->io_base + _REG(OSD1_HDR2_CTRL)); // fixes green/pink color distortion - reg_only_mat must be 0
>> +
> 
> This should go in meson_viu.c in meson_viu_init right after meson_viu_set_g12a_osd1_matrix() for
> VPU_COMPATIBLE_G12A (extend the else if case).
> 
> Please document the bits your write in meson_registers.h like:
> #define OSD1_HDR2_CTRL_VDIN0_HDR2_TOP_EN 	BIT(13)
> 
> and same for bits mat_o_en and reg_out_fmt, then use them in writel_bits_relaxed()
> 
>>         /* Hardware Initialization */
>>
>>         meson_vpu_init(priv);
>> diff --git a/drivers/gpu/drm/meson/meson_registers.h b/drivers/gpu/drm/meson/meson_registers.h
>> index 446e7961d..91351f9a3 100644
>> --- a/drivers/gpu/drm/meson/meson_registers.h
>> +++ b/drivers/gpu/drm/meson/meson_registers.h
>> @@ -634,6 +634,9 @@
>>  #define VPP_WRAP_OSD3_MATRIX_PRE_OFFSET2 0x3dbc
>>  #define VPP_WRAP_OSD3_MATRIX_EN_CTRL 0x3dbd
>>
>> +/* osd1 HDR */
>> +#define OSD1_HDR2_CTRL 0x38a0
>> +
>>  /* osd2 scaler */
>>  #define OSD2_VSC_PHASE_STEP 0x3d00
>>  #define OSD2_VSC_INI_PHASE 0x3d01
>>
> 
> This part will be ok with the bits defined.
> 
>>
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> 
> Neil
>