diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2024-04-02 18:50:13 +0300 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2024-04-04 16:29:10 +0300 |
| commit | bea9898561f1d38915128c57fd280a91e5048579 (patch) | |
| tree | 88f166aacb841dabe1824e7b65c807c1bb2b4a28 /drivers/gpu/drm/i915/display/skl_watermark.c | |
| parent | 48b85304c00c3b523a44d4cd96a8160becf3e3a4 (diff) | |
drm/i915: Use the correct mdclk/cdclk ratio in MBUS updates
The current cdclk/mbus programming sequence is as follows:
1. intel_set_cdclk_pre_plane_update()
2. update_mbus_pre_enable()
3. intel_set_cdclk_post_plane_update()
when the actual mdclk/cdclk programming is postponed to
intel_set_cdclk_post_plane_update() we must keep using
the old mdclk/cdclk ratio during update_mbus_pre_enable().
This guarantees the programmed ratio matches the rest of
the hardware state (mdlk/cdclk/mbus joining).
v2: Extracted from the vblank synchronized mbus programming patch
Cc: Gustavo Sousa <gustavo.sousa@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com> #v1
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240402155016.13733-12-ville.syrjala@linux.intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/display/skl_watermark.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/skl_watermark.c | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/drivers/gpu/drm/i915/display/skl_watermark.c b/drivers/gpu/drm/i915/display/skl_watermark.c index a118ecf9e532..028c3e6d6b1d 100644 --- a/drivers/gpu/drm/i915/display/skl_watermark.c +++ b/drivers/gpu/drm/i915/display/skl_watermark.c @@ -3663,20 +3663,17 @@ static void intel_dbuf_mdclk_min_tracker_update(struct intel_atomic_state *state intel_atomic_get_old_dbuf_state(state); const struct intel_dbuf_state *new_dbuf_state = intel_atomic_get_new_dbuf_state(state); + int mdclk_cdclk_ratio; - if (DISPLAY_VER(i915) >= 20 && - old_dbuf_state->mdclk_cdclk_ratio != new_dbuf_state->mdclk_cdclk_ratio) { - /* - * For Xe2LPD and beyond, when there is a change in the ratio - * between MDCLK and CDCLK, updates to related registers need to - * happen at a specific point in the CDCLK change sequence. In - * that case, we defer to the call to - * intel_dbuf_mdclk_cdclk_ratio_update() to the CDCLK logic. - */ - return; + if (intel_cdclk_is_decreasing_later(state)) { + /* cdclk/mdclk will be changed later by intel_set_cdclk_post_plane_update() */ + mdclk_cdclk_ratio = old_dbuf_state->mdclk_cdclk_ratio; + } else { + /* cdclk/mdclk already changed by intel_set_cdclk_pre_plane_update() */ + mdclk_cdclk_ratio = new_dbuf_state->mdclk_cdclk_ratio; } - intel_dbuf_mdclk_cdclk_ratio_update(i915, new_dbuf_state->mdclk_cdclk_ratio, + intel_dbuf_mdclk_cdclk_ratio_update(i915, mdclk_cdclk_ratio, new_dbuf_state->joined_mbus); } |