From cd6891f8e3714172cb2ff374d07cb6884b44b530 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Fri, 3 May 2024 15:24:49 +0300 Subject: [PATCH] drm/i915/bios: Define VBT block 253 (PRD Table) contents MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Define the contents of VBT block 253 (PRD Table). Unfortunately the block has two definitions, with the cutoff supposedly happening on ICL vs. TGL. Also according to some notes it might be that the VBIOS (if that's still a thing) still uses the old definition even on TGL+. Quite the mess. Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20240503122449.27266-36-ville.syrjala@linux.intel.com Reviewed-by: Jani Nikula --- drivers/gpu/drm/i915/display/intel_vbt_defs.h | 26 +++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_vbt_defs.h b/drivers/gpu/drm/i915/display/intel_vbt_defs.h index 3168c0bd5e238..862c5923b83d9 100644 --- a/drivers/gpu/drm/i915/display/intel_vbt_defs.h +++ b/drivers/gpu/drm/i915/display/intel_vbt_defs.h @@ -189,6 +189,7 @@ enum bdb_block_id { BDB_VSWING_PREEMPH = 57, /* 218+ */ BDB_GENERIC_DTD = 58, /* 229+ */ BDB_INT15_HOOK = 252, /* VBIOS only */ + BDB_PRD_TABLE = 253, BDB_SKIP = 254, /* VBIOS only */ }; @@ -1571,4 +1572,29 @@ struct bdb_generic_dtd { struct generic_dtd_entry dtd[]; /* up to 24 DTD's */ } __packed; +/* + * Block 253 - PRD Table + */ + +struct prd_entry_old { + u8 displays_attached; + u8 display_in_pipe_a; + u8 display_in_pipe_b; +} __packed; + +struct bdb_prd_table_old { + struct prd_entry_old list[0]; /* ???-216 */ + u16 num_entries; /* ???-216 */ +} __packed; + +struct prd_entry_new { + u16 primary_display; + u16 secondary_display; +} __packed; + +struct bdb_prd_table_new { + u16 num_entries; /* 217+ */ + struct prd_entry_new list[]; /* 217+ */ +} __packed; + #endif /* _INTEL_VBT_DEFS_H_ */ -- 2.47.2