Re: [PATCH v11 11/24] drm/rockchip: dw_hdmi: Use auto-generated tables

["Heiko Stübner" <heiko@sntech.de>]

Am Freitag, 22. April 2022, 09:28:28 CEST schrieb Sascha Hauer:
> From: Douglas Anderson <dianders@chromium.org>
> 
> The previous tables for mpll_cfg and curr_ctrl were created using the
> 20-pages of example settings provided by the PHY vendor.  Those
> example settings weren't particularly dense, so there were places
> where we were guessing what the settings would be for 10-bit and
> 12-bit (not that we use those anyway).  It was also always a lot of
> extra work every time we wanted to add a new clock rate since we had
> to cross-reference several tables.
> 
> In <https://crrev.com/c/285855> I've gone through the work to figure
> out how to generate this table automatically.  Let's now use the
> automatically generated table and then we'll never need to look at it
> again.
> 
> We only support 8-bit mode right now and only support a small number
> of clock rates and I've verified that the only 8-bit rate that was
> affected was 148.5.  That mode appears to have been wrong in the old
> table.
> 
> Signed-off-by: Douglas Anderson <dianders@chromium.org>
> Signed-off-by: Yakir Yang <ykk@rock-chips.com>
> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

This breaks hdmi on my rk3328-rock64 which then ends up in a
	[CRTC:37:crtc-0] vblank wait timed out

warning-loop.

Some part of the patch11-14 range also creates sparking horizontal
lines on my rk3288-pinky.

I haven't the time to dig overly deep into that, so left out the
hdmi-rate patches (11-14) for now.


Heiko


> ---
> 
> Notes:
>     Changes since v5:
>     - Add missing Signed-off-by me
>     
>     Changes since v3:
>     - new patch
> 
>  drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 130 +++++++++++---------
>  1 file changed, 69 insertions(+), 61 deletions(-)
> 
> diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> index fe4f9556239ac..cb43e7b47157d 100644
> --- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> +++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
> @@ -91,80 +91,88 @@ static struct rockchip_hdmi *to_rockchip_hdmi(struct drm_encoder *encoder)
>  
>  static const struct dw_hdmi_mpll_config rockchip_mpll_cfg[] = {
>  	{
> -		27000000, {
> -			{ 0x00b3, 0x0000},
> -			{ 0x2153, 0x0000},
> -			{ 0x40f3, 0x0000}
> +		30666000, {
> +			{ 0x00b3, 0x0000 },
> +			{ 0x2153, 0x0000 },
> +			{ 0x40f3, 0x0000 },
>  		},
> -	}, {
> -		36000000, {
> -			{ 0x00b3, 0x0000},
> -			{ 0x2153, 0x0000},
> -			{ 0x40f3, 0x0000}
> +	},  {
> +		36800000, {
> +			{ 0x00b3, 0x0000 },
> +			{ 0x2153, 0x0000 },
> +			{ 0x40a2, 0x0001 },
>  		},
> -	}, {
> -		40000000, {
> -			{ 0x00b3, 0x0000},
> -			{ 0x2153, 0x0000},
> -			{ 0x40f3, 0x0000}
> +	},  {
> +		46000000, {
> +			{ 0x00b3, 0x0000 },
> +			{ 0x2142, 0x0001 },
> +			{ 0x40a2, 0x0001 },
>  		},
> -	}, {
> -		54000000, {
> -			{ 0x0072, 0x0001},
> -			{ 0x2142, 0x0001},
> -			{ 0x40a2, 0x0001},
> +	},  {
> +		61333000, {
> +			{ 0x0072, 0x0001 },
> +			{ 0x2142, 0x0001 },
> +			{ 0x40a2, 0x0001 },
>  		},
> -	}, {
> -		65000000, {
> -			{ 0x0072, 0x0001},
> -			{ 0x2142, 0x0001},
> -			{ 0x40a2, 0x0001},
> +	},  {
> +		73600000, {
> +			{ 0x0072, 0x0001 },
> +			{ 0x2142, 0x0001 },
> +			{ 0x4061, 0x0002 },
>  		},
> -	}, {
> -		66000000, {
> -			{ 0x013e, 0x0003},
> -			{ 0x217e, 0x0002},
> -			{ 0x4061, 0x0002}
> +	},  {
> +		92000000, {
> +			{ 0x0072, 0x0001 },
> +			{ 0x2145, 0x0002 },
> +			{ 0x4061, 0x0002 },
>  		},
> -	}, {
> -		74250000, {
> -			{ 0x0072, 0x0001},
> -			{ 0x2145, 0x0002},
> -			{ 0x4061, 0x0002}
> +	},  {
> +		122666000, {
> +			{ 0x0051, 0x0002 },
> +			{ 0x2145, 0x0002 },
> +			{ 0x4061, 0x0002 },
>  		},
> -	}, {
> -		83500000, {
> -			{ 0x0072, 0x0001},
> +	},  {
> +		147200000, {
> +			{ 0x0051, 0x0002 },
> +			{ 0x2145, 0x0002 },
> +			{ 0x4064, 0x0003 },
>  		},
> -	}, {
> -		108000000, {
> -			{ 0x0051, 0x0002},
> -			{ 0x2145, 0x0002},
> -			{ 0x4061, 0x0002}
> +	},  {
> +		184000000, {
> +			{ 0x0051, 0x0002 },
> +			{ 0x214c, 0x0003 },
> +			{ 0x4064, 0x0003 },
>  		},
> -	}, {
> -		106500000, {
> -			{ 0x0051, 0x0002},
> -			{ 0x2145, 0x0002},
> -			{ 0x4061, 0x0002}
> +	},  {
> +		226666000, {
> +			{ 0x0040, 0x0003 },
> +			{ 0x214c, 0x0003 },
> +			{ 0x4064, 0x0003 },
>  		},
> -	}, {
> -		146250000, {
> -			{ 0x0051, 0x0002},
> -			{ 0x2145, 0x0002},
> -			{ 0x4061, 0x0002}
> +	},  {
> +		272000000, {
> +			{ 0x0040, 0x0003 },
> +			{ 0x214c, 0x0003 },
> +			{ 0x5a64, 0x0003 },
>  		},
> -	}, {
> -		148500000, {
> -			{ 0x0051, 0x0003},
> -			{ 0x214c, 0x0003},
> -			{ 0x4064, 0x0003}
> +	},  {
> +		340000000, {
> +			{ 0x0040, 0x0003 },
> +			{ 0x3b4c, 0x0003 },
> +			{ 0x5a64, 0x0003 },
>  		},
> -	}, {
> +	},  {
> +		600000000, {
> +			{ 0x1a40, 0x0003 },
> +			{ 0x3b4c, 0x0003 },
> +			{ 0x5a64, 0x0003 },
> +		},
> +	},  {
>  		~0UL, {
> -			{ 0x00a0, 0x000a },
> -			{ 0x2001, 0x000f },
> -			{ 0x4002, 0x000f },
> +			{ 0x0000, 0x0000 },
> +			{ 0x0000, 0x0000 },
> +			{ 0x0000, 0x0000 },
>  		},
>  	}
>  };
>