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[UPSTREAM BACKPORT] drm/i915/vbt: Add eDP Data rate overrride field in VBT #5560

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[UPSTREAM BACKPORT] drm/i915/vbt: Add eDP Data rate overrride field in VBT #5560

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4 changes: 3 additions & 1 deletion drivers/gpu/drm/i915/display/intel_bios.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2747,8 +2747,10 @@ static int child_device_expected_size(u16 version)
{
BUILD_BUG_ON(sizeof(struct child_device_config) < 40);

if (version > 256)
if (version > 263)
return -ENOENT;
else if (version >= 263)
return 44;
else if (version >= 256)
return 40;
else if (version >= 216)
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18 changes: 18 additions & 0 deletions drivers/gpu/drm/i915/display/intel_vbt_defs.h
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Original file line number Diff line number Diff line change
Expand Up @@ -437,6 +437,22 @@ enum vbt_gmbus_ddi {
#define BDB_230_VBT_DP_MAX_LINK_RATE_UHBR13P5 6
#define BDB_230_VBT_DP_MAX_LINK_RATE_UHBR20 7

/* EDP link rate 263+ */
#define BDB_263_VBT_EDP_LINK_RATE_1_62 BIT_U32(0)
#define BDB_263_VBT_EDP_LINK_RATE_2_16 BIT_U32(1)
#define BDB_263_VBT_EDP_LINK_RATE_2_43 BIT_U32(2)
#define BDB_263_VBT_EDP_LINK_RATE_2_7 BIT_U32(3)
#define BDB_263_VBT_EDP_LINK_RATE_3_24 BIT_U32(4)
#define BDB_263_VBT_EDP_LINK_RATE_4_32 BIT_U32(5)
#define BDB_263_VBT_EDP_LINK_RATE_5_4 BIT_U32(6)
#define BDB_263_VBT_EDP_LINK_RATE_6_75 BIT_U32(7)
#define BDB_263_VBT_EDP_LINK_RATE_8_1 BIT_U32(8)
#define BDB_263_VBT_EDP_LINK_RATE_10 BIT_U32(9)
#define BDB_263_VBT_EDP_LINK_RATE_13_5 BIT_U32(10)
#define BDB_263_VBT_EDP_LINK_RATE_20 BIT_U32(11)
#define BDB_263_VBT_EDP_NUM_RATES 12
#define BDB_263_VBT_EDP_RATES_MASK GENMASK(BDB_263_VBT_EDP_NUM_RATES - 1, 0)

/*
* The child device config, aka the display device data structure, provides a
* description of a port and its configuration on the platform.
Expand Down Expand Up @@ -547,6 +563,8 @@ struct child_device_config {
u8 dp_max_link_rate:3; /* 216+ */
u8 dp_max_link_rate_reserved:5; /* 216+ */
u8 efp_index; /* 256+ */
u32 edp_data_rate_override:12; /* 263+ */
u32 edp_data_rate_override_reserved:20; /* 263+ */
} __packed;

struct bdb_general_definitions {
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