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Commit d17c5443 authored by Shobhit Kumar's avatar Shobhit Kumar Committed by Daniel Vetter
Browse files

drm/i915: Parse the MIPI related VBT Block and store relevant info 



Initial parsing of the VBT MIPI block. For now, just store the panel id
if found.

Note: Again there seems to be no documentation for this piece of lore.
The doc situation for byt+ is just a bad joke :(

Signed-off-by: default avatarShobhit Kumar <shobhit.kumar@intel.com>
Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 4ce8c9a7

drivers/gpu/drm/i915/i915_drv.h

+5 −0
Original line number Original line Diff line number Diff line
@@ -1065,6 +1065,11 @@ struct intel_vbt_data { 
	int edp_bpp;

	int edp_bpp;

	struct edp_power_seq edp_pps;

	struct edp_power_seq edp_pps;





	/* MIPI DSI */

	struct {

		u16 panel_id;

	} dsi;



	int crt_ddc_pin;

	int crt_ddc_pin;





	int child_dev_num;

	int child_dev_num;

drivers/gpu/drm/i915/intel_bios.c

+16 −0
Original line number Original line Diff line number Diff line
@@ -568,6 +568,21 @@ parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb) 
	}

	}

}

}





static void

parse_mipi(struct drm_i915_private *dev_priv, struct bdb_header *bdb)

{

	struct bdb_mipi *mipi;



	mipi = find_section(bdb, BDB_MIPI);

	if (!mipi) {

		DRM_DEBUG_KMS("No MIPI BDB found");

		return;

	}



	/* XXX: add more info */

	dev_priv->vbt.dsi.panel_id = mipi->panel_id;

}



static void

static void

parse_device_mapping(struct drm_i915_private *dev_priv,

parse_device_mapping(struct drm_i915_private *dev_priv,

		       struct bdb_header *bdb)

		       struct bdb_header *bdb)
@@ -745,6 +760,7 @@ intel_parse_bios(struct drm_device *dev) 
	parse_device_mapping(dev_priv, bdb);

	parse_device_mapping(dev_priv, bdb);

	parse_driver_features(dev_priv, bdb);

	parse_driver_features(dev_priv, bdb);

	parse_edp(dev_priv, bdb);

	parse_edp(dev_priv, bdb);

	parse_mipi(dev_priv, bdb);





	if (bios)

	if (bios)

		pci_unmap_rom(pdev, bios);

		pci_unmap_rom(pdev, bios);

drivers/gpu/drm/i915/intel_bios.h

+41 −0
Original line number Original line Diff line number Diff line
@@ -104,6 +104,7 @@ struct vbios_data { 
#define BDB_LVDS_LFP_DATA	 42

#define BDB_LVDS_LFP_DATA	 42

#define BDB_LVDS_BACKLIGHT	 43

#define BDB_LVDS_BACKLIGHT	 43

#define BDB_LVDS_POWER		 44

#define BDB_LVDS_POWER		 44

#define BDB_MIPI		 50

#define BDB_SKIP		254 /* VBIOS private block, ignore */

#define BDB_SKIP		254 /* VBIOS private block, ignore */





struct bdb_general_features {

struct bdb_general_features {
@@ -618,4 +619,44 @@ int intel_parse_bios(struct drm_device *dev); 
#define		PORT_IDPC	8

#define		PORT_IDPC	8

#define		PORT_IDPD	9

#define		PORT_IDPD	9





/* MIPI DSI panel info */

struct bdb_mipi {

	u16 panel_id;

	u16 bridge_revision;



	/* General params */

	u32 dithering:1;

	u32 bpp_pixel_format:1;

	u32 rsvd1:1;

	u32 dphy_valid:1;

	u32 resvd2:28;



	u16 port_info;

	u16 rsvd3:2;

	u16 num_lanes:2;

	u16 rsvd4:12;



	/* DSI config */

	u16 virt_ch_num:2;

	u16 vtm:2;

	u16 rsvd5:12;



	u32 dsi_clock;

	u32 bridge_ref_clk;

	u16 rsvd_pwr;



	/* Dphy Params */

	u32 prepare_cnt:5;

	u32 rsvd6:3;

	u32 clk_zero_cnt:8;

	u32 trail_cnt:5;

	u32 rsvd7:3;

	u32 exit_zero_cnt:6;

	u32 rsvd8:2;



	u32 hl_switch_cnt;

	u32 lp_byte_clk;

	u32 clk_lane_switch_cnt;

} __attribute__((packed));



#endif /* _I830_BIOS_H_ */
 
#endif /* _I830_BIOS_H_ */