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: Shobhit Kumar <shobhit.kumar@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index e2628579dcbe8df41746d41274ec911c77297247..2cf9dabbfe5d7c30235ad1d86f58173836bd1b38 100644 (file)
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1065,6 +1065,11 @@ struct intel_vbt_data {
        int edp_bpp;
        struct edp_power_seq edp_pps;
 
+       /* MIPI DSI */
+       struct {
+               u16 panel_id;
+       } dsi;
+
        int crt_ddc_pin;
 
        int child_dev_num;

diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
index 53f2bed8bc5fabf812c16bb74a030e105bb386aa..6668873fb3a87a8fd6786274b228552547cb362e 100644 (file)
--- a/drivers/gpu/drm/i915/intel_bios.c
+++ b/drivers/gpu/drm/i915/intel_bios.c
@@ -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
 parse_device_mapping(struct drm_i915_private *dev_priv,
                       struct bdb_header *bdb)
@@ -745,6 +760,7 @@ intel_parse_bios(struct drm_device *dev)
        parse_device_mapping(dev_priv, bdb);
        parse_driver_features(dev_priv, bdb);
        parse_edp(dev_priv, bdb);
+       parse_mipi(dev_priv, bdb);
 
        if (bios)
                pci_unmap_rom(pdev, bios);

diff --git a/drivers/gpu/drm/i915/intel_bios.h b/drivers/gpu/drm/i915/intel_bios.h
index e088d6f0956a87a239cf94ab31983359d0993f70..6e9250eb9c2c4b02fd2837d45420b2de2411b7ef 100644 (file)
--- a/drivers/gpu/drm/i915/intel_bios.h
+++ b/drivers/gpu/drm/i915/intel_bios.h
@@ -104,6 +104,7 @@ struct vbios_data {
 #define BDB_LVDS_LFP_DATA       42
 #define BDB_LVDS_BACKLIGHT      43
 #define BDB_LVDS_POWER          44
+#define BDB_MIPI                50
 #define BDB_SKIP               254 /* VBIOS private block, ignore */
 
 struct bdb_general_features {
@@ -618,4 +619,44 @@ int intel_parse_bios(struct drm_device *dev);
 #define                PORT_IDPC       8
 #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_ */