For platforms that always use VRR Timing Generator, the VTOTAL.Vtotal
bits are not required. Since the support for these bits is going to
be deprecated in upcoming platforms, avoid writing these bits for the
platforms that do not use legacy Timing Generator.
Since for these platforms TRAN_VMIN is always filled with crtc_vtotal,
use TRAN_VRR_VMIN to get the vtotal for adjusted_mode.
v2: Avoid having a helper for manipulating VTOTAL register, and instead
just make the change where required. (Ville)
v3: Set `crtc_vtotal` instead of working with the bits directly (Ville).
Use intel_vrr_vmin_vtotal() to set the vtotal during readout. (Ville)
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
---
drivers/gpu/drm/i915/display/intel_display.c | 31 +++++++++++++++++++-
drivers/gpu/drm/i915/display/intel_vrr.c | 10 +++++++
2 files changed, 40 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 0db1cd4fc963..6796dd0307a6 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -2698,9 +2698,19 @@ static void intel_set_transcoder_timings(const struct intel_crtc_state *crtc_sta
HSYNC_START(adjusted_mode->crtc_hsync_start - 1) |
HSYNC_END(adjusted_mode->crtc_hsync_end - 1));
+ /*
+ * For platforms that always use VRR Timing Generator, the VTOTAL.Vtotal
+ * bits are not required. Since the support for these bits is going to
+ * be deprecated in upcoming platforms, avoid writing these bits for the
+ * platforms that do not use legacy Timing Generator.
+ */
+ if (intel_vrr_always_use_vrr_tg(display))
+ crtc_vtotal = 1;
+
intel_de_write(display, TRANS_VTOTAL(display, cpu_transcoder),
VACTIVE(crtc_vdisplay - 1) |
VTOTAL(crtc_vtotal - 1));
+
intel_de_write(display, TRANS_VBLANK(display, cpu_transcoder),
VBLANK_START(crtc_vblank_start - 1) |
VBLANK_END(crtc_vblank_end - 1));
@@ -2758,6 +2768,15 @@ static void intel_set_transcoder_timings_lrr(const struct intel_crtc_state *crtc
intel_de_write(display, TRANS_VBLANK(display, cpu_transcoder),
VBLANK_START(crtc_vblank_start - 1) |
VBLANK_END(crtc_vblank_end - 1));
+ /*
+ * For platforms that always use VRR Timing Generator, the VTOTAL.Vtotal
+ * bits are not required. Since the support for these bits is going to
+ * be deprecated in upcoming platforms, avoid writing these bits for the
+ * platforms that do not use legacy Timing Generator.
+ */
+ if (intel_vrr_always_use_vrr_tg(display))
+ crtc_vtotal = 1;
+
/*
* The double buffer latch point for TRANS_VTOTAL
* is the transcoder's undelayed vblank.
@@ -2827,7 +2846,17 @@ static void intel_get_transcoder_timings(struct intel_crtc *crtc,
tmp = intel_de_read(display, TRANS_VTOTAL(display, cpu_transcoder));
adjusted_mode->crtc_vdisplay = REG_FIELD_GET(VACTIVE_MASK, tmp) + 1;
- adjusted_mode->crtc_vtotal = REG_FIELD_GET(VTOTAL_MASK, tmp) + 1;
+
+ /*
+ * For platforms that always use VRR Timing Generator, the VTOTAL.Vtotal
+ * bits are not filled. The value for adjusted_mode->crtc_vtotal is read
+ * from VRR_VMIN register in intel_vrr_get_config.
+ * Just set this to 0 here.
+ */
+ if (intel_vrr_always_use_vrr_tg(display))
+ adjusted_mode->crtc_vtotal = 0;
+ else
+ adjusted_mode->crtc_vtotal = REG_FIELD_GET(VTOTAL_MASK, tmp) + 1;
/* FIXME TGL+ DSI transcoders have this! */
if (!transcoder_is_dsi(cpu_transcoder)) {
diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c b/drivers/gpu/drm/i915/display/intel_vrr.c
index 414f93851059..7359d66fc091 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.c
+++ b/drivers/gpu/drm/i915/display/intel_vrr.c
@@ -708,6 +708,16 @@ void intel_vrr_get_config(struct intel_crtc_state *crtc_state)
crtc_state->vrr.vmin = intel_de_read(display,
TRANS_VRR_VMIN(display, cpu_transcoder)) + 1;
+ /*
+ * For platforms that always use VRR Timing Generator, the VTOTAL.Vtotal
+ * bits are not filled. Since for these platforms TRAN_VMIN is always
+ * filled with crtc_vtotal, use TRAN_VRR_VMIN to get the vtotal for
+ * adjusted_mode.
+ */
+ if (intel_vrr_always_use_vrr_tg(display))
+ crtc_state->hw.adjusted_mode.crtc_vtotal =
+ intel_vrr_vmin_vtotal(crtc_state);
+
if (HAS_AS_SDP(display)) {
trans_vrr_vsync =
intel_de_read(display,
--
2.45.2