diff options
| author | Vinod Govindapillai <vinod.govindapillai@intel.com> | 2026-06-16 21:41:31 +0300 |
|---|---|---|
| committer | Vinod Govindapillai <vinod.govindapillai@intel.com> | 2026-06-19 19:22:06 +0300 |
| commit | de28bb67e245dbd7f8ea1c5621e1a30e19001283 (patch) | |
| tree | 2156ec9a31be7eff9ec56e3c8cd9b4918e7a43a9 | |
| parent | 4a68c7516c57a3d03b406c8aaa073c62149aad68 (diff) | |
drm/i915/display: update to the BW buddy configuration
Bspec has been updated for xe2_lpd+ platforms on how to handle
the bw buddy programming in case no matching memory configuration
is found w.r.t the current page mask table. The recommendation
is to keep the default settings for the related registers as it
is without explicitly disabling the bw buddy.
v2: removed extra explanation
v3: fixed typo in commit message
Bspec: 68871
Suggested-by: Ville Syrjala <ville.syrjala@intel.com>
Signed-off-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
Reviewed-by: Michał Grzelak <michal.grzelak@intel.com>
Link: https://patch.msgid.link/20260616184131.295013-1-vinod.govindapillai@intel.com
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_display_power.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c index dc3b31200353..8e312f5b9f6d 100644 --- a/drivers/gpu/drm/i915/display/intel_display_power.c +++ b/drivers/gpu/drm/i915/display/intel_display_power.c @@ -1802,9 +1802,12 @@ static void tgl_bw_buddy_init(struct intel_display *display) if (table[config].page_mask == 0) { drm_dbg_kms(display->drm, "Unknown memory configuration; disabling address buddy logic.\n"); - for_each_set_bit(i, &abox_mask, BITS_PER_TYPE(abox_mask)) - intel_de_write(display, BW_BUDDY_CTL(i), - BW_BUDDY_DISABLE); + + if (DISPLAY_VER(display) < 20) { + for_each_set_bit(i, &abox_mask, BITS_PER_TYPE(abox_mask)) + intel_de_write(display, BW_BUDDY_CTL(i), + BW_BUDDY_DISABLE); + } } else { for_each_set_bit(i, &abox_mask, BITS_PER_TYPE(abox_mask)) { intel_de_write(display, BW_BUDDY_PAGE_MASK(i), |