diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2025-03-13 16:08:31 +0200 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2025-04-02 02:16:12 +0300 |
| commit | 8f0d3618c6b31b1f8ff0c6c08cf6b101e56d6f8b (patch) | |
| tree | 635a7b8789ade10d6ee802c9bdbeec4f44d70561 /include/drm | |
| parent | 9e2434f32d2894e726c091f89ce0fd05e415d354 (diff) | |
agp/intel-gtt: Add intel_gmch_gtt_read_entry()
i915 wants to read out the PTE(s) populated by the BIOS/GOP
to verify that the framebuffer is in the correct location.
Introduce intel_gmch_gtt_read_entry() that reads out the
PTE and decodes it to a somewhat abstract form. For now
we just return the dma_addr, present bit, and local memory
bit. I didn't bother with the snoop bit/etc.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250313140838.29742-4-ville.syrjala@linux.intel.com
Reviewed-by: Jouni Högander <jouni.hogander@intel.com>
Diffstat (limited to 'include/drm')
| -rw-r--r-- | include/drm/intel/intel-gtt.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/drm/intel/intel-gtt.h b/include/drm/intel/intel-gtt.h index cb0d5b7200c7..f53bcff01f22 100644 --- a/include/drm/intel/intel-gtt.h +++ b/include/drm/intel/intel-gtt.h @@ -28,6 +28,8 @@ void intel_gmch_gtt_insert_sg_entries(struct sg_table *st, unsigned int pg_start, unsigned int flags); void intel_gmch_gtt_clear_range(unsigned int first_entry, unsigned int num_entries); +dma_addr_t intel_gmch_gtt_read_entry(unsigned int pg, + bool *is_present, bool *is_local); /* Special gtt memory types */ #define AGP_DCACHE_MEMORY 1 |