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SubjectRe: [PATCH v3 05/13] drm/mediatek: add memory mode and layer_config for RDMA
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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@mediatek.com>

Reviewed-by: CK Hu <ck.hu@mediatek.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,


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