Re: [PATCH RFC 5/5] drm/msm: dpu1: sm8550: move split clock controls to sspp entries

[Dmitry Baryshkov <dmitry.baryshkov@linaro.org>]

On 09/10/2023 19:36, Neil Armstrong wrote:
> The SM8550 has the SSPP clk_ctrl in the SSPP registers, move them
> out of the MDP top.
> 
> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
> ---
>   .../gpu/drm/msm/disp/dpu1/catalog/dpu_9_0_sm8550.h | 35 ++++++++++------------
>   1 file changed, 15 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_9_0_sm8550.h b/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_9_0_sm8550.h
> index 7bed819dfc39..527ec020fba4 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_9_0_sm8550.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_9_0_sm8550.h
> @@ -24,16 +24,6 @@ static const struct dpu_mdp_cfg sm8550_mdp = {
>   	.base = 0, .len = 0x494,
>   	.features = BIT(DPU_MDP_PERIPH_0_REMOVED),
>   	.clk_ctrls = {
> -		[DPU_CLK_CTRL_VIG0] = { .reg_off = 0x4330, .bit_off = 0 },
> -		[DPU_CLK_CTRL_VIG1] = { .reg_off = 0x6330, .bit_off = 0 },
> -		[DPU_CLK_CTRL_VIG2] = { .reg_off = 0x8330, .bit_off = 0 },
> -		[DPU_CLK_CTRL_VIG3] = { .reg_off = 0xa330, .bit_off = 0 },
> -		[DPU_CLK_CTRL_DMA0] = { .reg_off = 0x24330, .bit_off = 0 },
> -		[DPU_CLK_CTRL_DMA1] = { .reg_off = 0x26330, .bit_off = 0 },
> -		[DPU_CLK_CTRL_DMA2] = { .reg_off = 0x28330, .bit_off = 0 },
> -		[DPU_CLK_CTRL_DMA3] = { .reg_off = 0x2a330, .bit_off = 0 },
> -		[DPU_CLK_CTRL_DMA4] = { .reg_off = 0x2c330, .bit_off = 0 },
> -		[DPU_CLK_CTRL_DMA5] = { .reg_off = 0x2e330, .bit_off = 0 },
>   		[DPU_CLK_CTRL_REG_DMA] = { .reg_off = 0x2bc, .bit_off = 20 },

Hmm, interesting. I even double-checked this. SSPP and WB have their own 
clock registers now. But the REG_DMA uses the main area (0x2bc).

>   	},
>   };
> @@ -73,6 +63,11 @@ static const struct dpu_ctl_cfg sm8550_ctl[] = {
>   	},
>   };
>   
> +static const struct dpu_clk_ctrl_reg sm8550_sspp_clk_ctrl = {
> +	.reg_off = 0x330,
> +	.bit_off = 0
> +};

I don't think we even need this outside of dpu_hw_sspp. You can use 
core_major_rev to check whether the driver should use global clocks or 
per-SSPP / per-WB clocks register instead.

> +
>   static const struct dpu_sspp_cfg sm8550_sspp[] = {
>   	{
>   		.name = "sspp_0", .id = SSPP_VIG0,
> @@ -81,7 +76,7 @@ static const struct dpu_sspp_cfg sm8550_sspp[] = {
>   		.sblk = &sm8550_vig_sblk_0,
>   		.xin_id = 0,
>   		.type = SSPP_TYPE_VIG,
> -		.clk_ctrl = DPU_CLK_CTRL_VIG0,
> +		.clk_ctrl_reg = &sm8550_sspp_clk_ctrl,
>   	}, {
>   		.name = "sspp_1", .id = SSPP_VIG1,
>   		.base = 0x6000, .len = 0x344,
> @@ -89,7 +84,7 @@ static const struct dpu_sspp_cfg sm8550_sspp[] = {
>   		.sblk = &sm8550_vig_sblk_1,
>   		.xin_id = 4,
>   		.type = SSPP_TYPE_VIG,
> -		.clk_ctrl = DPU_CLK_CTRL_VIG1,
> +		.clk_ctrl_reg = &sm8550_sspp_clk_ctrl,
>   	}, {
>   		.name = "sspp_2", .id = SSPP_VIG2,
>   		.base = 0x8000, .len = 0x344,
> @@ -97,7 +92,7 @@ static const struct dpu_sspp_cfg sm8550_sspp[] = {
>   		.sblk = &sm8550_vig_sblk_2,
>   		.xin_id = 8,
>   		.type = SSPP_TYPE_VIG,
> -		.clk_ctrl = DPU_CLK_CTRL_VIG2,
> +		.clk_ctrl_reg = &sm8550_sspp_clk_ctrl,
>   	}, {
>   		.name = "sspp_3", .id = SSPP_VIG3,
>   		.base = 0xa000, .len = 0x344,
> @@ -105,7 +100,7 @@ static const struct dpu_sspp_cfg sm8550_sspp[] = {
>   		.sblk = &sm8550_vig_sblk_3,
>   		.xin_id = 12,
>   		.type = SSPP_TYPE_VIG,
> -		.clk_ctrl = DPU_CLK_CTRL_VIG3,
> +		.clk_ctrl_reg = &sm8550_sspp_clk_ctrl,
>   	}, {
>   		.name = "sspp_8", .id = SSPP_DMA0,
>   		.base = 0x24000, .len = 0x344,
> @@ -113,7 +108,7 @@ static const struct dpu_sspp_cfg sm8550_sspp[] = {
>   		.sblk = &sdm845_dma_sblk_0,
>   		.xin_id = 1,
>   		.type = SSPP_TYPE_DMA,
> -		.clk_ctrl = DPU_CLK_CTRL_DMA0,
> +		.clk_ctrl_reg = &sm8550_sspp_clk_ctrl,
>   	}, {
>   		.name = "sspp_9", .id = SSPP_DMA1,
>   		.base = 0x26000, .len = 0x344,
> @@ -121,7 +116,7 @@ static const struct dpu_sspp_cfg sm8550_sspp[] = {
>   		.sblk = &sdm845_dma_sblk_1,
>   		.xin_id = 5,
>   		.type = SSPP_TYPE_DMA,
> -		.clk_ctrl = DPU_CLK_CTRL_DMA1,
> +		.clk_ctrl_reg = &sm8550_sspp_clk_ctrl,
>   	}, {
>   		.name = "sspp_10", .id = SSPP_DMA2,
>   		.base = 0x28000, .len = 0x344,
> @@ -129,7 +124,7 @@ static const struct dpu_sspp_cfg sm8550_sspp[] = {
>   		.sblk = &sdm845_dma_sblk_2,
>   		.xin_id = 9,
>   		.type = SSPP_TYPE_DMA,
> -		.clk_ctrl = DPU_CLK_CTRL_DMA2,
> +		.clk_ctrl_reg = &sm8550_sspp_clk_ctrl,
>   	}, {
>   		.name = "sspp_11", .id = SSPP_DMA3,
>   		.base = 0x2a000, .len = 0x344,
> @@ -137,7 +132,7 @@ static const struct dpu_sspp_cfg sm8550_sspp[] = {
>   		.sblk = &sdm845_dma_sblk_3,
>   		.xin_id = 13,
>   		.type = SSPP_TYPE_DMA,
> -		.clk_ctrl = DPU_CLK_CTRL_DMA3,
> +		.clk_ctrl_reg = &sm8550_sspp_clk_ctrl,
>   	}, {
>   		.name = "sspp_12", .id = SSPP_DMA4,
>   		.base = 0x2c000, .len = 0x344,
> @@ -145,7 +140,7 @@ static const struct dpu_sspp_cfg sm8550_sspp[] = {
>   		.sblk = &sm8550_dma_sblk_4,
>   		.xin_id = 14,
>   		.type = SSPP_TYPE_DMA,
> -		.clk_ctrl = DPU_CLK_CTRL_DMA4,
> +		.clk_ctrl_reg = &sm8550_sspp_clk_ctrl,
>   	}, {
>   		.name = "sspp_13", .id = SSPP_DMA5,
>   		.base = 0x2e000, .len = 0x344,
> @@ -153,7 +148,7 @@ static const struct dpu_sspp_cfg sm8550_sspp[] = {
>   		.sblk = &sm8550_dma_sblk_5,
>   		.xin_id = 15,
>   		.type = SSPP_TYPE_DMA,
> -		.clk_ctrl = DPU_CLK_CTRL_DMA5,
> +		.clk_ctrl_reg = &sm8550_sspp_clk_ctrl,
>   	},
>   };
>   
> 

-- 
With best wishes
Dmitry