diff options
| -rw-r--r-- | include/usb_pd.h | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/include/usb_pd.h b/include/usb_pd.h index 6051706670..08236b8813 100644 --- a/include/usb_pd.h +++ b/include/usb_pd.h @@ -847,8 +847,6 @@ struct pd_cable { (((snkp) & 0xff) << 16 | ((srcp) & 0xff) << 8 \ | ((usb) & 1) << 7 | ((gdr) & 1) << 6 | ((sign) & 0xF) << 2 \ | ((sdir) & 0x3)) -#define PD_DP_PIN_CAPS(x) ((((x) >> 6) & 0x1) ? (((x) >> 16) & 0x3f) \ - : (((x) >> 8) & 0x3f)) #define MODE_DP_PIN_A 0x01 #define MODE_DP_PIN_B 0x02 @@ -867,6 +865,8 @@ struct pd_cable { #define MODE_DP_PIN_BR2_MASK 0x3 /* Pin configs C/D/E/F support DP signaling levels */ #define MODE_DP_PIN_DP_MASK 0x3c +/* Pin configs A/B/C/D/E/F */ +#define MODE_DP_PIN_CAPS_MASK 0x3f #define MODE_DP_V13 0x1 #define MODE_DP_GEN2 0x2 @@ -875,6 +875,24 @@ struct pd_cable { #define MODE_DP_SRC 0x2 #define MODE_DP_BOTH 0x3 +#define MODE_DP_CABLE_SHIFT 6 + +/* + * Determine which pin assignments are valid for DP + * + * Based on whether the DP adapter identifies itself as a plug (permanently + * attached cable) or a receptacle, the pin assignments may be in the DFP_D + * field or the UFP_D field. + * + * Refer to DisplayPort Alt Mode On USB Type-C Standard version 1.0, table 5-2 + * depending on state of receptacle bit, use pins for DFP_D (if receptacle==0) + * or UFP_D (if receptacle==1) + * Also refer to DisplayPort Alt Mode Capabilities Clarification (4/30/2015) + */ +#define PD_DP_PIN_CAPS(x) ((((x) >> MODE_DP_CABLE_SHIFT) & 0x1) \ + ? (((x) >> MODE_DP_UFP_PIN_SHIFT) & MODE_DP_PIN_CAPS_MASK) \ + : (((x) >> MODE_DP_DFP_PIN_SHIFT) & MODE_DP_PIN_CAPS_MASK)) + /* * DisplayPort Status VDO * ---------------------- |