Re: [PATCH v9 03/11] drm: bridge: dw_mipi_dsi: add dsi v1.01 support

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Hi Adrian,

thanks for the pach: tested on stm32mp1.

Tested-by: Yannick Fertré <yannick.fertre@xxxxxx>

On 6/9/20 7:49 PM, Adrian Ratiu wrote:
> The Synopsis MIPI DSI v1.01 host controller is quite widely used
> on platforms like i.mx6 and is not very different from the other
> versions like the 1.31/1.30 used on rockchip/stm. The protocols
> appear to be the same, only the register layout is different and
> the newer versions have new features symbolized by new registers
> so adding support for it is just a matter of defining the new
> layout and adding a couple of dsi version checks.
>
> Tested-by: Adrian Pop <pop.adrian61@xxxxxxxxx>
> Tested-by: Arnaud Ferraris <arnaud.ferraris@xxxxxxxxxxxxx>
> Signed-off-by: Adrian Ratiu <adrian.ratiu@xxxxxxxxxxxxx>
> ---
> Changes since v7:
>    - Minor commit msg rewording for consistency
>
> Changes since v5:
>    - Fixed cfg_phy_status range from [0,0] to [0,2]
>
> New in v5.
> ---
>   drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 125 +++++++++++++++++-
>   1 file changed, 119 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> index f453df4eb5072..16fd87055e7b7 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
> @@ -32,6 +32,7 @@
>   
>   #define HWVER_131			0x31333100	/* IP version 1.31 */
>   #define HWVER_130			0x31333000	/* IP version 1.30 */
> +#define HWVER_101			0x31303000	/* IP version 1.01 */
>   
>   #define DSI_VERSION			0x00
>   #define VERSION				GENMASK(31, 8)
> @@ -100,6 +101,25 @@
>   #define DSI_EDPI_CMD_SIZE		0x64
>   
>   #define DSI_CMD_MODE_CFG		0x68
> +
> +#define DSI_DPI_CFG			0x0c
> +#define DSI_TMR_LINE_CFG		0x28
> +#define DSI_VTIMING_CFG			0x2c
> +#define DSI_PHY_TMR_CFG_V101		0x30
> +#define DSI_PHY_IF_CFG_V101		0x58
> +#define DSI_PHY_IF_CTRL			0x5c
> +#define DSI_PHY_RSTZ_V101		0x54
> +#define DSI_PHY_STATUS_V101		0x60
> +#define DSI_PHY_TST_CTRL0_V101		0x64
> +#define DSI_GEN_HDR_V101		0x34
> +#define DSI_GEN_PLD_DATA_V101		0x38
> +#define DSI_CMD_MODE_CFG_V101		0x24
> +#define DSI_CMD_PKT_STATUS_V101		0x3c
> +#define DSI_VID_PKT_CFG			0x20
> +#define DSI_VID_MODE_CFG_V101		0x1c
> +#define DSI_TO_CNT_CFG_V101		0x40
> +#define DSI_PCKHDL_CFG_V101		0x18
> +
>   #define MAX_RD_PKT_SIZE_LP		BIT(24)
>   #define DCS_LW_TX_LP			BIT(19)
>   #define DCS_SR_0P_TX_LP			BIT(18)
> @@ -127,6 +147,33 @@
>   					 GEN_SW_1P_TX_LP | \
>   					 GEN_SW_0P_TX_LP)
>   
> +#define EN_TEAR_FX_V101			BIT(14)
> +#define DCS_LW_TX_LP_V101		BIT(12)
> +#define GEN_LW_TX_LP_V101		BIT(11)
> +#define MAX_RD_PKT_SIZE_LP_V101		BIT(10)
> +#define DCS_SW_2P_TX_LP_V101		BIT(9)
> +#define DCS_SW_1P_TX_LP_V101		BIT(8)
> +#define DCS_SW_0P_TX_LP_V101		BIT(7)
> +#define GEN_SR_2P_TX_LP_V101		BIT(6)
> +#define GEN_SR_1P_TX_LP_V101		BIT(5)
> +#define GEN_SR_0P_TX_LP_V101		BIT(4)
> +#define GEN_SW_2P_TX_LP_V101		BIT(3)
> +#define GEN_SW_1P_TX_LP_V101		BIT(2)
> +#define GEN_SW_0P_TX_LP_V101		BIT(1)
> +
> +#define CMD_MODE_ALL_LP_V101		(DCS_LW_TX_LP_V101 | \
> +					 GEN_LW_TX_LP_V101 | \
> +					 MAX_RD_PKT_SIZE_LP_V101 | \
> +					 DCS_SW_2P_TX_LP_V101 | \
> +					 DCS_SW_1P_TX_LP_V101 | \
> +					 DCS_SW_0P_TX_LP_V101 | \
> +					 GEN_SR_2P_TX_LP_V101 | \
> +					 GEN_SR_1P_TX_LP_V101 | \
> +					 GEN_SR_0P_TX_LP_V101 | \
> +					 GEN_SW_2P_TX_LP_V101 | \
> +					 GEN_SW_1P_TX_LP_V101 | \
> +					 GEN_SW_0P_TX_LP_V101)
> +
>   #define DSI_GEN_HDR			0x6c
>   #define DSI_GEN_PLD_DATA		0x70
>   
> @@ -165,6 +212,11 @@
>   #define DSI_INT_MSK0			0xc4
>   #define DSI_INT_MSK1			0xc8
>   
> +#define DSI_ERROR_ST0_V101		0x44
> +#define DSI_ERROR_ST1_V101		0x48
> +#define DSI_ERROR_MSK0_V101		0x4c
> +#define DSI_ERROR_MSK1_V101		0x50
> +
>   #define DSI_PHY_TMR_RD_CFG		0xf4
>   
>   #define PHY_STATUS_TIMEOUT_US		10000
> @@ -359,6 +411,49 @@ static const struct dw_mipi_dsi_variant dw_mipi_dsi_v130_v131_layout = {
>   	.cfg_gen_payload =		REG_FIELD(DSI_GEN_PLD_DATA, 0, 31),
>   };
>   
> +static const struct dw_mipi_dsi_variant dw_mipi_dsi_v101_layout = {
> +	.cfg_dpi_vid =			REG_FIELD(DSI_DPI_CFG, 0, 1),
> +	.cfg_dpi_color_coding =		REG_FIELD(DSI_DPI_CFG, 2, 4),
> +	.cfg_dpi_18loosely_en =		REG_FIELD(DSI_DPI_CFG, 10, 10),
> +	.cfg_dpi_vsync_active_low =	REG_FIELD(DSI_DPI_CFG, 6, 6),
> +	.cfg_dpi_hsync_active_low =	REG_FIELD(DSI_DPI_CFG, 7, 7),
> +	.cfg_cmd_mode_en =		REG_FIELD(DSI_CMD_MODE_CFG_V101, 0, 0),
> +	.cfg_cmd_mode_all_lp_en =	REG_FIELD(DSI_CMD_MODE_CFG_V101, 1, 12),
> +	.cfg_cmd_mode_ack_rqst_en =	REG_FIELD(DSI_CMD_MODE_CFG_V101, 13, 13),
> +	.cfg_cmd_pkt_status =		REG_FIELD(DSI_CMD_PKT_STATUS_V101, 0, 14),
> +	.cfg_vid_mode_en =		REG_FIELD(DSI_VID_MODE_CFG_V101, 0, 0),
> +	.cfg_vid_mode_type =		REG_FIELD(DSI_VID_MODE_CFG_V101, 1, 2),
> +	.cfg_vid_mode_low_power =	REG_FIELD(DSI_VID_MODE_CFG_V101, 3, 8),
> +	.cfg_vid_pkt_size =		REG_FIELD(DSI_VID_PKT_CFG, 0, 10),
> +	.cfg_vid_hsa_time =		REG_FIELD(DSI_TMR_LINE_CFG, 0, 8),
> +	.cfg_vid_hbp_time =		REG_FIELD(DSI_TMR_LINE_CFG, 9, 17),
> +	.cfg_vid_hline_time =		REG_FIELD(DSI_TMR_LINE_CFG, 18, 31),
> +	.cfg_vid_vsa_time =		REG_FIELD(DSI_VTIMING_CFG, 0, 3),
> +	.cfg_vid_vbp_time =		REG_FIELD(DSI_VTIMING_CFG, 4, 9),
> +	.cfg_vid_vfp_time =		REG_FIELD(DSI_VTIMING_CFG, 10, 15),
> +	.cfg_vid_vactive_time =		REG_FIELD(DSI_VTIMING_CFG, 16, 26),
> +	.cfg_phy_txrequestclkhs =	REG_FIELD(DSI_PHY_IF_CTRL, 0, 0),
> +	.cfg_phy_bta_time =		REG_FIELD(DSI_PHY_TMR_CFG_V101, 0, 11),
> +	.cfg_phy_lp2hs_time =		REG_FIELD(DSI_PHY_TMR_CFG_V101, 12, 19),
> +	.cfg_phy_hs2lp_time =		REG_FIELD(DSI_PHY_TMR_CFG_V101, 20, 27),
> +	.cfg_phy_testclr =		REG_FIELD(DSI_PHY_TST_CTRL0_V101, 0, 0),
> +	.cfg_phy_unshutdownz =		REG_FIELD(DSI_PHY_RSTZ_V101, 0, 0),
> +	.cfg_phy_unrstz =		REG_FIELD(DSI_PHY_RSTZ_V101, 1, 1),
> +	.cfg_phy_enableclk =		REG_FIELD(DSI_PHY_RSTZ_V101, 2, 2),
> +	.cfg_phy_nlanes =		REG_FIELD(DSI_PHY_IF_CFG_V101, 0, 1),
> +	.cfg_phy_stop_wait_time =	REG_FIELD(DSI_PHY_IF_CFG_V101, 2, 9),
> +	.cfg_phy_status =		REG_FIELD(DSI_PHY_STATUS_V101, 0, 2),
> +	.cfg_pckhdl_cfg =		REG_FIELD(DSI_PCKHDL_CFG_V101, 0, 4),
> +	.cfg_hstx_timeout_counter =	REG_FIELD(DSI_TO_CNT_CFG_V101, 0, 15),
> +	.cfg_lprx_timeout_counter =	REG_FIELD(DSI_TO_CNT_CFG_V101, 16, 31),
> +	.cfg_int_stat0 =		REG_FIELD(DSI_ERROR_ST0_V101, 0, 20),
> +	.cfg_int_stat1 =		REG_FIELD(DSI_ERROR_ST1_V101, 0, 17),
> +	.cfg_int_mask0 =		REG_FIELD(DSI_ERROR_MSK0_V101, 0, 20),
> +	.cfg_int_mask1 =		REG_FIELD(DSI_ERROR_MSK1_V101, 0, 17),
> +	.cfg_gen_hdr =			REG_FIELD(DSI_GEN_HDR_V101, 0, 31),
> +	.cfg_gen_payload =		REG_FIELD(DSI_GEN_PLD_DATA_V101, 0, 31),
> +};
> +
>   /*
>    * Check if either a link to a master or slave is present
>    */
> @@ -466,6 +561,9 @@ static void dw_mipi_message_config(struct dw_mipi_dsi *dsi,
>   	case HWVER_131:
>   		cmd_mode_lp = CMD_MODE_ALL_LP;
>   		break;
> +	case HWVER_101:
> +		cmd_mode_lp = CMD_MODE_ALL_LP_V101;
> +		break;
>   	}
>   
>   	if (msg->flags & MIPI_DSI_MSG_REQ_ACK)
> @@ -644,7 +742,7 @@ static void dw_mipi_dsi_video_mode_config(struct dw_mipi_dsi *dsi)
>   				   VID_MODE_TYPE_NON_BURST_SYNC_EVENTS);
>   
>   #ifdef CONFIG_DEBUG_FS
> -	if (dsi->vpg) {
> +	if (dsi->hw_version > HWVER_101 && dsi->vpg) {
>   		regmap_field_write(dsi->field_vid_mode_vpg_en, 1);
>   		regmap_field_write(dsi->field_vid_mode_vpg_horiz,
>   				   dsi->vpg_horizontal ? 1 : 0);
> @@ -662,9 +760,15 @@ static void dw_mipi_dsi_set_mode(struct dw_mipi_dsi *dsi,
>   
>   		dw_mipi_dsi_video_mode_config(dsi);
>   
> +		if (dsi->hw_version == HWVER_101)
> +			regmap_field_write(dsi->field_vid_mode_en, 1);
> +
>   		regmap_field_write(dsi->field_phy_txrequestclkhs, 1);
>   	} else {
>   		regmap_field_write(dsi->field_cmd_mode_en, 1);
> +
> +		if (dsi->hw_version == HWVER_101)
> +			regmap_field_write(dsi->field_vid_mode_en, 0);
>   	}
>   
>   	regmap_write(dsi->regs, DSI_PWR_UP, POWERUP);
> @@ -856,9 +960,13 @@ static void dw_mipi_dsi_dphy_timing_config(struct dw_mipi_dsi *dsi)
>   	regmap_field_write(dsi->field_phy_lp2hs_time, timing.data_lp2hs);
>   	regmap_field_write(dsi->field_phy_hs2lp_time, timing.data_hs2lp);
>   
> -	regmap_field_write(dsi->field_phy_max_rd_time, 10000);
> -	regmap_field_write(dsi->field_phy_clkhs2lp_time, timing.clk_hs2lp);
> -	regmap_field_write(dsi->field_phy_clklp2hs_time, timing.clk_lp2hs);
> +	if (dsi->hw_version > HWVER_101) {
> +		regmap_field_write(dsi->field_phy_max_rd_time, 10000);
> +		regmap_field_write(dsi->field_phy_clkhs2lp_time,
> +				   timing.clk_hs2lp);
> +		regmap_field_write(dsi->field_phy_clklp2hs_time,
> +				   timing.clk_lp2hs);
> +	}
>   }
>   
>   static void dw_mipi_dsi_dphy_interface_config(struct dw_mipi_dsi *dsi)
> @@ -879,7 +987,8 @@ static void dw_mipi_dsi_dphy_init(struct dw_mipi_dsi *dsi)
>   	regmap_field_write(dsi->field_phy_unrstz, 0);
>   	regmap_field_write(dsi->field_phy_unshutdownz, 0);
>   
> -	regmap_field_write(dsi->field_phy_forcepll, 0);
> +	if (dsi->hw_version > HWVER_101)
> +		regmap_field_write(dsi->field_phy_forcepll, 0);
>   
>   	regmap_field_write(dsi->field_phy_testclr, 0);
>   	regmap_field_write(dsi->field_phy_testclr, 1);
> @@ -895,7 +1004,8 @@ static void dw_mipi_dsi_dphy_enable(struct dw_mipi_dsi *dsi)
>   	regmap_field_write(dsi->field_phy_unrstz, 1);
>   	regmap_field_write(dsi->field_phy_unshutdownz, 1);
>   
> -	regmap_field_write(dsi->field_phy_forcepll, 1);
> +	if (dsi->hw_version > HWVER_101)
> +		regmap_field_write(dsi->field_phy_forcepll, 1);
>   
>   	ret = regmap_field_read_poll_timeout(dsi->field_phy_status,
>   					     val, val & PHY_LOCK,
> @@ -1132,6 +1242,9 @@ static int dw_mipi_dsi_regmap_fields_init(struct dw_mipi_dsi *dsi)
>   	case HWVER_131:
>   		variant = &dw_mipi_dsi_v130_v131_layout;
>   		break;
> +	case HWVER_101:
> +		variant = &dw_mipi_dsi_v101_layout;
> +		break;
>   	default:
>   		DRM_ERROR("Unrecognized DSI host controller HW revision\n");
>   		return -ENODEV;
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