From: Ville Syrjälä Date: Thu, 12 Jun 2025 14:50:14 +0000 (+0300) Subject: drm/i915/dsb: Provide intel_dsb_head() and intel_dsb_size() X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=7e151f53fd6aec9fa04cec6a23a54cd415650330;p=thirdparty%2Flinux.git drm/i915/dsb: Provide intel_dsb_head() and intel_dsb_size() The upcoming flip queue implementation will need to know the DSB buffer head and size. Expose those outside intel_dsb.c. Reviewed-by: Uma Shankar Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20250612145018.8735-3-ville.syrjala@linux.intel.com --- diff --git a/drivers/gpu/drm/i915/display/intel_dsb.c b/drivers/gpu/drm/i915/display/intel_dsb.c index 96baef5d5b1ad..50d8c4900644a 100644 --- a/drivers/gpu/drm/i915/display/intel_dsb.c +++ b/drivers/gpu/drm/i915/display/intel_dsb.c @@ -241,14 +241,19 @@ static bool is_dsb_busy(struct intel_display *display, enum pipe pipe, return intel_de_read_fw(display, DSB_CTRL(pipe, dsb_id)) & DSB_STATUS_BUSY; } -static unsigned int intel_dsb_head(struct intel_dsb *dsb) +unsigned int intel_dsb_size(struct intel_dsb *dsb) +{ + return dsb->free_pos * 4; +} + +unsigned int intel_dsb_head(struct intel_dsb *dsb) { return intel_dsb_buffer_ggtt_offset(&dsb->dsb_buf); } static unsigned int intel_dsb_tail(struct intel_dsb *dsb) { - return intel_dsb_buffer_ggtt_offset(&dsb->dsb_buf) + dsb->free_pos * 4; + return intel_dsb_buffer_ggtt_offset(&dsb->dsb_buf) + intel_dsb_size(dsb); } static void intel_dsb_ins_align(struct intel_dsb *dsb) diff --git a/drivers/gpu/drm/i915/display/intel_dsb.h b/drivers/gpu/drm/i915/display/intel_dsb.h index 6900acd603b86..ab64897498666 100644 --- a/drivers/gpu/drm/i915/display/intel_dsb.h +++ b/drivers/gpu/drm/i915/display/intel_dsb.h @@ -26,6 +26,8 @@ enum intel_dsb_id { I915_MAX_DSBS, }; +unsigned int intel_dsb_size(struct intel_dsb *dsb); +unsigned int intel_dsb_head(struct intel_dsb *dsb); struct intel_dsb *intel_dsb_prepare(struct intel_atomic_state *state, struct intel_crtc *crtc, enum intel_dsb_id dsb_id,