From: Ville Syrjälä Date: Tue, 6 Jun 2023 19:15:00 +0000 (+0300) Subject: drm/i915: Introduce skl_watermark_max_latency() X-Git-Tag: io_uring-6.7-2023-11-10~63^2~15^2~15 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=b4283282c9538958f7ee23c5af3bab3e4e94d553;p=linux-block.git drm/i915: Introduce skl_watermark_max_latency() The DSB code will want to know the maximum PkgC latency it has to contend with. Add a helper to expose that information. Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20230606191504.18099-16-ville.syrjala@linux.intel.com Reviewed-by: Uma Shankar --- diff --git a/drivers/gpu/drm/i915/display/skl_watermark.c b/drivers/gpu/drm/i915/display/skl_watermark.c index 64a122d3c9c0..c1a90e058ffd 100644 --- a/drivers/gpu/drm/i915/display/skl_watermark.c +++ b/drivers/gpu/drm/i915/display/skl_watermark.c @@ -3721,3 +3721,17 @@ void skl_watermark_debugfs_register(struct drm_i915_private *i915) debugfs_create_file("i915_sagv_status", 0444, minor->debugfs_root, i915, &intel_sagv_status_fops); } + +unsigned int skl_watermark_max_latency(struct drm_i915_private *i915) +{ + int level; + + for (level = i915->display.wm.num_levels - 1; level >= 0; level--) { + unsigned int latency = skl_wm_latency(i915, level, NULL); + + if (latency) + return latency; + } + + return 0; +} diff --git a/drivers/gpu/drm/i915/display/skl_watermark.h b/drivers/gpu/drm/i915/display/skl_watermark.h index f91a3d4ddc07..edb61e33df83 100644 --- a/drivers/gpu/drm/i915/display/skl_watermark.h +++ b/drivers/gpu/drm/i915/display/skl_watermark.h @@ -46,6 +46,8 @@ void skl_watermark_ipc_update(struct drm_i915_private *i915); bool skl_watermark_ipc_enabled(struct drm_i915_private *i915); void skl_watermark_debugfs_register(struct drm_i915_private *i915); +unsigned int skl_watermark_max_latency(struct drm_i915_private *i915); + void skl_wm_init(struct drm_i915_private *i915); struct intel_dbuf_state {