Re: [PATCH v16 3/8] drm/mediatek: Add MT8195 Embedded DisplayPort driver

CK Hu
2022-08-08T04:03:37Z

Hi, Bo-Chen:

On Fri, 2022-08-05 at 18:14 +0800, Bo-Chen Chen wrote:
> From: Markus Schneider-Pargmann <msp@baylibre.com>
>
> This patch adds a embedded displayport driver for the MediaTek mt8195
> SoC.
>
> It supports the MT8195, the embedded DisplayPort units. It offers
> DisplayPort 1.4 with up to 4 lanes.
>
> The driver creates a child device for the phy. The child device will
> never exist without the parent being active. As they are sharing a
> register range, the parent passes a regmap pointer to the child so
> that
> both can work with the same register range. The phy driver sets
> device
> data that is read by the parent to get the phy device that can be
> used
> to control the phy properties.
>
> This driver is based on an initial version by
> Jitao shi <jitao.shi@mediatek.com>
>
> Signed-off-by: Markus Schneider-Pargmann <msp@baylibre.com>
> Signed-off-by: Guillaume Ranquet <granquet@baylibre.com>
> Signed-off-by: Bo-Chen Chen <rex-bc.chen@mediatek.com>
> Tested-by: AngeloGioacchino Del Regno <
> angelogioacchino.delregno@collabora.com>
> Reviewed-by: AngeloGioacchino Del Regno <
> angelogioacchino.delregno@collabora.com>
> ---

[snip]

> +
> +#define MTK_DP_ENC0_P0_30B8 (ENC0_OFFSET + 0xB8)

Useless, so remove it.

> +
> +#define MTK_DP_ENC0_P0_30BC (ENC0_OFFSET + 0xBC)

Ditto.

> +#define ISRC_CONT_DP_ENC0_P0_MASK BIT(0)
> +#define ISRC_CONT_DP_ENC0_P0_SHIFT 0
> +#define AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_MASK GENMASK(10, 8)
> +#define AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_SHIFT BIT(3)
> +#define AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_MUL_2 \
> + (1 << AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_SHIFT)
> +#define AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_MUL_4 \
> + (2 << AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_SHIFT)
> +#define AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_MUL_8 \
> + (3 << AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_SHIFT)
> +#define AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_2 \
> + (5 << AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_SHIFT)
> +#define AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_4 \
> + (6 << AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_SHIFT)
> +#define AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_8 \
> + (7 << AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_SHIFT)
> +
> +#define MTK_DP_ENC0_P0_30D8 (ENC0_OFFSET + 0xD8)

Ditto.

> +#define MTK_DP_ENC0_P0_312C (ENC0_OFFSET + 0x12C)

Ditto.

> +#define ASP_HB2_DP_ENC0_P0_MASK GENMASK(7, 0)
> +#define ASP_HB3_DP_ENC0_P0_MASK GENMASK(15, 8)
> +#define ASP_HB3_DP_ENC0_P0_SHIFT BIT(3)
> +
>

[snip]

> +
> +#define MTK_DP_ENC1_P0_3364 (ENC1_OFFSET +
> 0x164)
> +#define SDP_DOWN_CNT_INIT_IN_HBLANK_DP_ENC1_P0_MASK GENMASK(11, 0)
> +#define SDP_DOWN_CNT_INIT_IN_HBLANK_DP_ENC1_P0_SHIFT 0
> +#define FIFO_READ_START_POINT_DP_ENC1_P0_MASK GENMASK
> (15, 12)
> +#define FIFO_READ_START_POINT_DP_ENC1_P0_SHIFT GENMASK
> (3, 2)

I would like bit-wise value has one more indent like [1].

[1]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/gpu/drm/mediatek/mtk_disp_rdma.c?h=v5.19

Regards,
CK

> +
> +#define MTK_DP_ENC1_P0_3368 (ENC1_OFFSET +
> 0x168)
> +#define VIDEO_SRAM_FIFO_CNT_RESET_SEL_DP_ENC1_P0_SHIFT 0
> +#define VIDEO_STABLE_CNT_THRD_DP_ENC1_P0_SHIFT BIT(2)
> +#define SDP_DP13_EN_DP_ENC1_P0_SHIFT BIT(3)
> +#define BS2BS_MODE_DP_ENC1_P0_MASK GENMASK(13, 12)
> +#define BS2BS_MODE_DP_ENC1_P0_SHIFT GENMASK(3, 2)
> +
>