linux-kernel - Re: [PATCH v3 05/13] drm/mediatek: add memory mode and layer

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Date:   Tue, 7 Aug 2018 10:37:24 +0800
From:   CK Hu <ck.hu@...iatek.com>
To:     Stu Hsieh <stu.hsieh@...iatek.com>
CC:     Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...ux.ie>,
        Matthias Brugger <matthias.bgg@...il.com>,
        <dri-devel@...ts.freedesktop.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <srv_heupstream@...iatek.com>
Subject: Re: [PATCH v3 05/13] drm/mediatek: add memory mode and layer_config
 for RDMA

Hi, Stu:

On Mon, 2018-08-06 at 19:58 +0800, Stu Hsieh wrote:
> This patch add memory mode for RDMA and layer_config for RDMA
> 
> If use RDMA to read data from memory, it should set memory mode to RDMA
> 
> Layer config set the data address and pitch to RDMA from plane setting.
> 
> Signed-off-by: Stu Hsieh <stu.hsieh@...iatek.com>

Reviewed-by: CK Hu <ck.hu@...iatek.com>

> ---
>  drivers/gpu/drm/mediatek/mtk_disp_rdma.c | 21 +++++++++++++++++++++
>  1 file changed, 21 insertions(+)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_rdma.c b/drivers/gpu/drm/mediatek/mtk_disp_rdma.c
> index 585943c81e1f..08866550740f 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_rdma.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_rdma.c
> @@ -31,14 +31,20 @@
>  #define RDMA_REG_UPDATE_INT				BIT(0)
>  #define DISP_REG_RDMA_GLOBAL_CON		0x0010
>  #define RDMA_ENGINE_EN					BIT(0)
> +#define RDMA_MODE_MEMORY				BIT(1)
>  #define DISP_REG_RDMA_SIZE_CON_0		0x0014
>  #define DISP_REG_RDMA_SIZE_CON_1		0x0018
>  #define DISP_REG_RDMA_TARGET_LINE		0x001c
> +#define DISP_RDMA_MEM_SRC_PITCH			0x002c
> +#define DISP_RDMA_MEM_GMC_SETTING_0		0x0030
>  #define DISP_REG_RDMA_FIFO_CON			0x0040
>  #define RDMA_FIFO_UNDERFLOW_EN				BIT(31)
>  #define RDMA_FIFO_PSEUDO_SIZE(bytes)			(((bytes) / 16) << 16)
>  #define RDMA_OUTPUT_VALID_FIFO_THRESHOLD(bytes)		((bytes) / 16)
>  #define RDMA_FIFO_SIZE(rdma)			((rdma)->data->fifo_size)
> +#define DISP_RDMA_MEM_START_ADDR		0x0f00
> +
> +#define RDMA_MEM_GMC				0x40402020
>  
>  struct mtk_disp_rdma_data {
>  	unsigned int fifo_size;
> @@ -138,12 +144,27 @@ static void mtk_rdma_config(struct mtk_ddp_comp *comp, unsigned int width,
>  	writel(reg, comp->regs + DISP_REG_RDMA_FIFO_CON);
>  }
>  
> +static void mtk_rdma_layer_config(struct mtk_ddp_comp *comp, unsigned int idx,
> +				  struct mtk_plane_state *state)
> +{
> +	struct mtk_plane_pending_state *pending = &state->pending;
> +	unsigned int addr = pending->addr;
> +	unsigned int pitch = pending->pitch & 0xffff;
> +
> +	writel_relaxed(addr, comp->regs + DISP_RDMA_MEM_START_ADDR);
> +	writel_relaxed(pitch, comp->regs + DISP_RDMA_MEM_SRC_PITCH);
> +	writel(RDMA_MEM_GMC, comp->regs + DISP_RDMA_MEM_GMC_SETTING_0);
> +	rdma_update_bits(comp, DISP_REG_RDMA_GLOBAL_CON,
> +			 RDMA_MODE_MEMORY, RDMA_MODE_MEMORY);
> +}
> +
>  static const struct mtk_ddp_comp_funcs mtk_disp_rdma_funcs = {
>  	.config = mtk_rdma_config,
>  	.start = mtk_rdma_start,
>  	.stop = mtk_rdma_stop,
>  	.enable_vblank = mtk_rdma_enable_vblank,
>  	.disable_vblank = mtk_rdma_disable_vblank,
> +	.layer_config = mtk_rdma_layer_config,
>  };
>  
>  static int mtk_disp_rdma_bind(struct device *dev, struct device *master,