Re: [PATCH v3 05/13] drm: renesas: rzg2l_mipi_dsi: Add RZ/G3L MIPI DSI support

[Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>]

Hi Biju,
Thanks for your patch.

On Wed, Aug 26, 2026 at 06:48:39PM +0100, Biju wrote:
> From: Biju Das <biju.das.jz@bp.renesas.com>
> 
> Add support for the MIPI DSI controller found on the Renesas RZ/G3L
> (R9A08G046) SoC. The D-PHY global timing table of RZ/G3L SoC different
> compared to the other SoCs. Introduce a dedicated D-PHY global timing
> table rzg3l_mipi_dsi_global_timings and wire it up via a new
> rzg3l_mipi_dsi_info hw_info variant for RZ/G3L SoC.
> 
> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
> ---
> v1->v2:
>  * Moved set duty cycle to DU encoder.
> v1->v2:
>  * Replaced syscon_field->pwrrdy in struct rzg3l_mipi_dsi_info.
> ---
>  .../gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c    | 117 ++++++++++++++++++
>  1 file changed, 117 insertions(+)
> 
> diff --git a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c b/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c
> index 7df5f4a4161b..88ec0612d529 100644
> --- a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c
> +++ b/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c
> @@ -226,6 +226,107 @@ static const struct rzg2l_mipi_dsi_timings rzg2l_mipi_dsi_global_timings[] = {
>  	},
>  };
>  
> +static const struct rzg2l_mipi_dsi_timings rzg3l_mipi_dsi_global_timings[] = {
> +	{
> +		.hsfreq_max = 100000000,
> +		.t_init = 79801,
> +		.tclk_prepare = 10,
> +		.ths_prepare = 18,
> +		.tclk_zero = 35,
> +		.tclk_pre = 13,
> +		.tclk_post = 94,
> +		.tclk_trail = 10,
> +		.ths_zero = 16,
> +		.ths_trail = 22,
> +		.ths_exit = 15,
> +		.tlpx = 9,

Ok

> +	},
> +	{
> +		.hsfreq_max = 150000000,
> +		.t_init = 79801,
> +		.tclk_prepare = 10,
> +		.ths_prepare = 16,
> +		.tclk_zero = 35,
> +		.tclk_pre = 13,
> +		.tclk_post = 94,
> +		.tclk_trail = 10,
> +		.ths_zero = 16,
> +		.ths_trail = 15,
> +		.ths_exit = 15,
> +		.tlpx = 9,

Ok

> +	},
> +	{
> +		.hsfreq_max = 250000000,
> +		.t_init = 79801,
> +		.tclk_prepare = 10,
> +		.ths_prepare = 13,
> +		.tclk_zero = 35,
> +		.tclk_pre = 13,
> +		.tclk_post = 58,
> +		.tclk_trail = 8,
> +		.ths_zero = 16,
> +		.ths_trail = 10,
> +		.ths_exit = 15,
> +		.tlpx = 9,

Ok

> +	},
> +	{
> +		.hsfreq_max = 400000000,
> +		.t_init = 79801,
> +		.tclk_prepare = 10,
> +		.ths_prepare = 12,
> +		.tclk_zero = 35,
> +		.tclk_pre = 4,
> +		.tclk_post = 58,
> +		.tclk_trail = 7,
> +		.ths_zero = 16,
> +		.ths_trail = 9,
> +		.ths_exit = 15,
> +		.tlpx = 9,

Ok

> +	},
> +	{
> +		.hsfreq_max = 600000000,
> +		.t_init = 79801,
> +		.tclk_prepare = 10,
> +		.ths_prepare = 11,
> +		.tclk_zero = 35,
> +		.tclk_pre = 4,
> +		.tclk_post = 35,
> +		.tclk_trail = 5,
> +		.ths_zero = 16,
> +		.ths_trail = 6,
> +		.ths_exit = 15,
> +		.tlpx = 9,

Ok

> +	},
> +	{
> +		.hsfreq_max = 1000000000,
> +		.t_init = 79801,
> +		.tclk_prepare = 10,
> +		.ths_prepare = 11,
> +		.tclk_zero = 35,
> +		.tclk_pre = 4,
> +		.tclk_post = 35,
> +		.tclk_trail = 5,
> +		.ths_zero = 16,
> +		.ths_trail = 6,
> +		.ths_exit = 15,
> +		.tlpx = 9,

Ok

> +	},
> +	{
> +		.hsfreq_max = 1500000000,
> +		.t_init = 79801,
> +		.tclk_prepare = 10,
> +		.ths_prepare = 11,
> +		.tclk_zero = 35,
> +		.tclk_pre = 4,
> +		.tclk_post = 35,
> +		.tclk_trail = 4,
> +		.ths_zero = 16,
> +		.ths_trail = 5,
> +		.ths_exit = 15,
> +		.tlpx = 9,

Ok

> +	},
> +};


This is aligned with:

9.5 MIPI DSI Interface (DSI)
Table 9.5-4 (Recommended Setting Values of the DSI D-PHY Timing
Register)

Of the the RZ/G3L reference manual.

> +
>  /**
>   * struct rzv2h_mipi_dsi_timings - Timing parameter table structure
>   *
> @@ -1580,7 +1681,23 @@ static const struct rzg2l_mipi_dsi_hw_info rzg2l_mipi_dsi_info = {
>  	.activation_dly = 1000,
>  };
>  
> +static const struct rzg2l_mipi_dsi_hw_info rzg3l_mipi_dsi_info = {
> +	.dphy_init = rzg2l_mipi_dsi_dphy_init,
> +	.dphy_exit = rzg2l_mipi_dsi_dphy_exit,
> +	.dphy_conf_clks = rzg2l_dphy_conf_clks,
> +	.dsi_global_timings = rzg3l_mipi_dsi_global_timings,
> +	.num_dsi_global_timings = ARRAY_SIZE(rzg3l_mipi_dsi_global_timings),
> +	.link_reg_offset = 0x10000,
> +	.dphyctrl0_init_val = DSIDPHYCTRL0_CMN_MASTER_EN | DSIDPHYCTRL0_EN_BGR,
> +	.min_dclk = 5440,
> +	.max_dclk = 187500,
> +	.activation_dly = 100,
> +	.features = RZ_MIPI_DSI_FEATURE_16BPP,
> +	.pwrrdy = true,
> +};
> +
>  static const struct of_device_id rzg2l_mipi_dsi_of_table[] = {
> +	{ .compatible = "renesas,r9a08g046-mipi-dsi", .data = &rzg3l_mipi_dsi_info, },

Looks good to me.

Reviewed-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>

Kind regards,
Tommaso

>  	{ .compatible = "renesas,r9a09g057-mipi-dsi", .data = &rzv2h_mipi_dsi_info, },
>  	{ .compatible = "renesas,rzg2l-mipi-dsi", .data = &rzg2l_mipi_dsi_info, },
>  	{ /* sentinel */ }
> -- 
> 2.43.0
>