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Commit 75d7247c authored by Archit Taneja's avatar Archit Taneja Committed by Tomi Valkeinen
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OMAP: DSS2: DSI: Get number of DSI data lanes using DSI_GNQ register 



On OMAP3, the DSI module has 2 data lanes. On OMAP4, DSI1 has 4 data lanes
and DSI2 has 2 data lanes. Introduce function dsi_get_num_data_lanes() which
returns the number of data lanes on the dsi interface, introduce function
dsi_get_num_data_lanes_dssdev() which returns the number of data lanes used by
the omap_dss_device connected to the lanes.

Use the DSI_GNQ register on OMAP4 to get the number of data lanes, modify
dsi.c to use the number of lanes and the extra data lanes on DSI1.

Signed-off-by: default avatarArchit Taneja <archit@ti.com>
Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
parent 49dbf589

drivers/video/omap2/dss/dsi.c

+88 −9
Original line number Diff line number Diff line
@@ -59,6 +59,7 @@ struct dsi_reg { u16 idx; }; 
#define DSI_IRQSTATUS			DSI_REG(0x0018)

#define DSI_IRQENABLE			DSI_REG(0x001C)

#define DSI_CTRL			DSI_REG(0x0040)

#define DSI_GNQ				DSI_REG(0x0044)

#define DSI_COMPLEXIO_CFG1		DSI_REG(0x0048)

#define DSI_COMPLEXIO_IRQ_STATUS	DSI_REG(0x004C)

#define DSI_COMPLEXIO_IRQ_ENABLE	DSI_REG(0x0050)
@@ -238,6 +239,10 @@ enum dsi_lane { 
	DSI_DATA1_N	= 1 << 3,

	DSI_DATA2_P	= 1 << 4,

	DSI_DATA2_N	= 1 << 5,

	DSI_DATA3_P	= 1 << 6,

	DSI_DATA3_N	= 1 << 7,

	DSI_DATA4_P	= 1 << 8,

	DSI_DATA4_N	= 1 << 9,

};



struct dsi_update_region {
@@ -326,6 +331,8 @@ struct dsi_data { 
	unsigned long  fint_min, fint_max;

	unsigned long lpdiv_max;



	int num_data_lanes;



	unsigned scp_clk_refcount;

};
@@ -2001,10 +2008,39 @@ static int dsi_cio_power(struct platform_device *dsidev, 
	return 0;

}



/* Number of data lanes present on DSI interface */

static inline int dsi_get_num_data_lanes(struct platform_device *dsidev)

{

	/* DSI on OMAP3 doesn't have register DSI_GNQ, set number

	 * of data lanes as 2 by default */

	if (dss_has_feature(FEAT_DSI_GNQ))

		return REG_GET(dsidev, DSI_GNQ, 11, 9);	/* NB_DATA_LANES */

	else

		return 2;

}



/* Number of data lanes used by the dss device */

static inline int dsi_get_num_data_lanes_dssdev(struct omap_dss_device *dssdev)

{

	int num_data_lanes = 0;



	if (dssdev->phy.dsi.data1_lane != 0)

		num_data_lanes++;

	if (dssdev->phy.dsi.data2_lane != 0)

		num_data_lanes++;

	if (dssdev->phy.dsi.data3_lane != 0)

		num_data_lanes++;

	if (dssdev->phy.dsi.data4_lane != 0)

		num_data_lanes++;



	return num_data_lanes;

}



static void dsi_set_lane_config(struct omap_dss_device *dssdev)

{

	struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);

	u32 r;

	int num_data_lanes_dssdev = dsi_get_num_data_lanes_dssdev(dssdev);



	int clk_lane   = dssdev->phy.dsi.clk_lane;

	int data1_lane = dssdev->phy.dsi.data1_lane;
@@ -2020,6 +2056,20 @@ static void dsi_set_lane_config(struct omap_dss_device *dssdev) 
	r = FLD_MOD(r, data1_pol, 7, 7);

	r = FLD_MOD(r, data2_lane, 10, 8);

	r = FLD_MOD(r, data2_pol, 11, 11);

	if (num_data_lanes_dssdev > 2) {

		int data3_lane  = dssdev->phy.dsi.data3_lane;

		int data3_pol  = dssdev->phy.dsi.data3_pol;



		r = FLD_MOD(r, data3_lane, 14, 12);

		r = FLD_MOD(r, data3_pol, 15, 15);

	}

	if (num_data_lanes_dssdev > 3) {

		int data4_lane  = dssdev->phy.dsi.data4_lane;

		int data4_pol  = dssdev->phy.dsi.data4_pol;



		r = FLD_MOD(r, data4_lane, 18, 16);

		r = FLD_MOD(r, data4_pol, 19, 19);

	}

	dsi_write_reg(dsidev, DSI_COMPLEXIO_CFG1, r);



	/* The configuration of the DSI complex I/O (number of data lanes,
@@ -2132,14 +2182,20 @@ static void dsi_cio_enable_lane_override(struct omap_dss_device *dssdev, 
		enum dsi_lane lanes)

{

	struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);

	struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);

	int clk_lane   = dssdev->phy.dsi.clk_lane;

	int data1_lane = dssdev->phy.dsi.data1_lane;

	int data2_lane = dssdev->phy.dsi.data2_lane;

	int data3_lane = dssdev->phy.dsi.data3_lane;

	int data4_lane = dssdev->phy.dsi.data4_lane;

	int clk_pol    = dssdev->phy.dsi.clk_pol;

	int data1_pol  = dssdev->phy.dsi.data1_pol;

	int data2_pol  = dssdev->phy.dsi.data2_pol;

	int data3_pol  = dssdev->phy.dsi.data3_pol;

	int data4_pol  = dssdev->phy.dsi.data4_pol;



	u32 l = 0;

	u8 lptxscp_start = dsi->num_data_lanes == 2 ? 22 : 26;



	if (lanes & DSI_CLK_P)

		l |= 1 << ((clk_lane - 1) * 2 + (clk_pol ? 0 : 1));
@@ -2156,17 +2212,28 @@ static void dsi_cio_enable_lane_override(struct omap_dss_device *dssdev, 
	if (lanes & DSI_DATA2_N)

		l |= 1 << ((data2_lane - 1) * 2 + (data2_pol ? 1 : 0));



	if (lanes & DSI_DATA3_P)

		l |= 1 << ((data3_lane - 1) * 2 + (data3_pol ? 0 : 1));

	if (lanes & DSI_DATA3_N)

		l |= 1 << ((data3_lane - 1) * 2 + (data3_pol ? 1 : 0));



	if (lanes & DSI_DATA4_P)

		l |= 1 << ((data4_lane - 1) * 2 + (data4_pol ? 0 : 1));

	if (lanes & DSI_DATA4_N)

		l |= 1 << ((data4_lane - 1) * 2 + (data4_pol ? 1 : 0));

	/*

	 * Bits in REGLPTXSCPDAT4TO0DXDY:

	 * 17: DY0 18: DX0

	 * 19: DY1 20: DX1

	 * 21: DY2 22: DX2

	 * 23: DY3 24: DX3

	 * 25: DY4 26: DX4

	 */



	/* Set the lane override configuration */



	/* REGLPTXSCPDAT4TO0DXDY */

	REG_FLD_MOD(dsidev, DSI_DSIPHY_CFG10, l, 22, 17);

	REG_FLD_MOD(dsidev, DSI_DSIPHY_CFG10, l, lptxscp_start, 17);



	/* Enable lane override */
@@ -2248,6 +2315,7 @@ static int dsi_cio_init(struct omap_dss_device *dssdev) 
	struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);

	struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);

	int r;

	int num_data_lanes_dssdev = dsi_get_num_data_lanes_dssdev(dssdev);

	u32 l;



	DSSDBGF();
@@ -2279,6 +2347,8 @@ static int dsi_cio_init(struct omap_dss_device *dssdev) 
	dsi_write_reg(dsidev, DSI_TIMING1, l);



	if (dsi->ulps_enabled) {

		u32 lane_mask = DSI_CLK_P | DSI_DATA1_P | DSI_DATA2_P;



		DSSDBG("manual ulps exit\n");



		/* ULPS is exited by Mark-1 state for 1ms, followed by
@@ -2289,8 +2359,13 @@ static int dsi_cio_init(struct omap_dss_device *dssdev) 
		 * manually.

		 */



		dsi_cio_enable_lane_override(dssdev,

				DSI_CLK_P | DSI_DATA1_P | DSI_DATA2_P);

		if (num_data_lanes_dssdev > 2)

			lane_mask |= DSI_DATA3_P;



		if (num_data_lanes_dssdev > 3)

			lane_mask |= DSI_DATA4_P;



		dsi_cio_enable_lane_override(dssdev, lane_mask);

	}



	r = dsi_cio_power(dsidev, DSI_COMPLEXIO_POWER_ON);
@@ -3495,12 +3570,7 @@ static void dsi_proto_timings(struct omap_dss_device *dssdev) 
	/* min 60ns + 52*UI */

	tclk_post = ns2ddr(dsidev, 60) + 26;



	/* ths_eot is 2 for 2 datalanes and 4 for 1 datalane */

	if (dssdev->phy.dsi.data1_lane != 0 &&

			dssdev->phy.dsi.data2_lane != 0)

		ths_eot = 2;

	else

		ths_eot = 4;

	ths_eot = DIV_ROUND_UP(4, dsi_get_num_data_lanes_dssdev(dssdev));



	ddr_clk_pre = DIV_ROUND_UP(tclk_pre + tlpx + tclk_zero + tclk_prepare,

			4);
@@ -4220,6 +4290,7 @@ int dsi_init_display(struct omap_dss_device *dssdev) 
{

	struct platform_device *dsidev = dsi_get_dsidev_from_dssdev(dssdev);

	struct dsi_data *dsi = dsi_get_dsidrv_data(dsidev);

	int dsi_module = dsi_get_dsidev_id(dsidev);



	DSSDBG("DSI init\n");
@@ -4240,6 +4311,12 @@ int dsi_init_display(struct omap_dss_device *dssdev) 
		dsi->vdds_dsi_reg = vdds_dsi;

	}



	if (dsi_get_num_data_lanes_dssdev(dssdev) > dsi->num_data_lanes) {

		DSSERR("DSI%d can't support more than %d data lanes\n",

			dsi_module + 1, dsi->num_data_lanes);

		return -EINVAL;

	}



	return 0;

}
@@ -4416,6 +4493,8 @@ static int dsi_init(struct platform_device *dsidev) 
	dev_dbg(&dsidev->dev, "OMAP DSI rev %d.%d\n",

	       FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));



	dsi->num_data_lanes = dsi_get_num_data_lanes(dsidev);



	enable_clocks(0);



	return 0;

drivers/video/omap2/dss/dss_features.c

+2 −1
Original line number Diff line number Diff line
@@ -294,7 +294,8 @@ static const struct omap_dss_features omap4_dss_features = { 
		FEAT_GLOBAL_ALPHA | FEAT_PRE_MULT_ALPHA |

		FEAT_MGR_LCD2 | FEAT_GLOBAL_ALPHA_VID1 |

		FEAT_CORE_CLK_DIV | FEAT_LCD_CLK_SRC |

		FEAT_DSI_DCS_CMD_CONFIG_VC | FEAT_DSI_VC_OCP_WIDTH,

		FEAT_DSI_DCS_CMD_CONFIG_VC | FEAT_DSI_VC_OCP_WIDTH |

		FEAT_DSI_GNQ,



	.num_mgrs = 3,

	.num_ovls = 3,

drivers/video/omap2/dss/dss_features.h

+1 −0
Original line number Diff line number Diff line
@@ -47,6 +47,7 @@ enum dss_feat_id { 
	FEAT_DSI_DCS_CMD_CONFIG_VC	= 1 << 15,

	FEAT_DSI_VC_OCP_WIDTH		= 1 << 16,

	FEAT_DSI_REVERSE_TXCLKESC	= 1 << 17,

	FEAT_DSI_GNQ			= 1 << 18,

};



/* DSS register field id */

include/video/omapdss.h

+4 −0
Original line number Diff line number Diff line
@@ -420,6 +420,10 @@ struct omap_dss_device { 
			u8 data1_pol;

			u8 data2_lane;

			u8 data2_pol;

			u8 data3_lane;

			u8 data3_pol;

			u8 data4_lane;

			u8 data4_pol;



			int module;