Compute vrr_vsync_start/end, which sets the position
for hardware to send the Vsync at a fixed position
relative to the end of the Vblank.
--v2:
- Updated VSYNC_START/END macros to VRR_VSYNC_START/END. (Ankit)
- Updated bit fields of VRR_VSYNC_START/END. (Ankit)
--v3:
- Add PIPE_CONF_CHECK_I(vrr.vsync_start/end).
- Read/write vrr_vsync params only when we intend to send
adaptive_sync sdp.
--v4:
- Use VRR_SYNC_START/END macros correctly.
--v5:
- Send AS SDP only when VRR is enabled.
--v6:
- Add TRANS_VRR_VSYNC befor enabling VRR as per bspec. (Ankit)
Signed-off-by: Mitul Golani <mitulkumar.ajitkumar.gol...@intel.com>
Reviewed-by: Arun R Murthy <arun.r.mur...@intel.com>
---
drivers/gpu/drm/i915/display/intel_display.c | 2 ++
.../drm/i915/display/intel_display_types.h | 1 +
drivers/gpu/drm/i915/display/intel_vrr.c | 33 +++++++++++++++++--
drivers/gpu/drm/i915/i915_reg.h | 7 ++++
4 files changed, 41 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c
b/drivers/gpu/drm/i915/display/intel_display.c
index eb8f36b38c41..9e5924e21eee 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -5356,6 +5356,8 @@ intel_pipe_config_compare(const struct intel_crtc_state
*current_config,
PIPE_CONF_CHECK_I(vrr.flipline);
PIPE_CONF_CHECK_I(vrr.pipeline_full);
PIPE_CONF_CHECK_I(vrr.guardband);
+ PIPE_CONF_CHECK_I(vrr.vsync_start);
+ PIPE_CONF_CHECK_I(vrr.vsync_end);
}
#undef PIPE_CONF_CHECK_X
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h
b/drivers/gpu/drm/i915/display/intel_display_types.h
index 36fcded7564a..95da3cf27188 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1431,6 +1431,7 @@ struct intel_crtc_state {
bool enable, in_range;
u8 pipeline_full;
u16 flipline, vmin, vmax, guardband;
+ u32 vsync_end, vsync_start;
} vrr;
/* Stream Splitter for eDP MSO */
diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c
b/drivers/gpu/drm/i915/display/intel_vrr.c
index eb5bd0743902..856378f8b90e 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.c
+++ b/drivers/gpu/drm/i915/display/intel_vrr.c
@@ -9,6 +9,7 @@
#include "intel_de.h"
#include "intel_display_types.h"
#include "intel_vrr.h"
+#include "intel_dp.h"
bool intel_vrr_is_capable(struct intel_connector *connector)
{
@@ -113,6 +114,7 @@ intel_vrr_compute_config(struct intel_crtc_state
*crtc_state,
struct drm_i915_private *i915 = to_i915(crtc->base.dev);
struct intel_connector *connector =
to_intel_connector(conn_state->connector);
+ struct intel_dp *intel_dp = intel_attached_dp(connector);
struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode;
const struct drm_display_info *info = &connector->base.display_info;
int vmin, vmax;
@@ -165,6 +167,14 @@ intel_vrr_compute_config(struct intel_crtc_state
*crtc_state,
if (crtc_state->uapi.vrr_enabled) {
crtc_state->vrr.enable = true;
crtc_state->mode_flags |= I915_MODE_FLAG_VRR;
+ if (intel_dp_as_sdp_supported(intel_dp)) {
+ crtc_state->vrr.vsync_start =
+ (crtc_state->hw.adjusted_mode.crtc_vtotal -
+
crtc_state->hw.adjusted_mode.vsync_start);
+ crtc_state->vrr.vsync_end =
+ (crtc_state->hw.adjusted_mode.crtc_vtotal -
+ crtc_state->hw.adjusted_mode.vsync_end);
+ }
}
}
@@ -240,6 +250,12 @@ void intel_vrr_enable(const struct intel_crtc_state
*crtc_state)
return;
intel_de_write(dev_priv, TRANS_PUSH(cpu_transcoder), TRANS_PUSH_EN);
+
+ if (HAS_AS_SDP(dev_priv))
+ intel_de_write(dev_priv, TRANS_VRR_VSYNC(cpu_transcoder),
+ VRR_VSYNC_END(crtc_state->vrr.vsync_end) |
+ VRR_VSYNC_START(crtc_state->vrr.vsync_start));
+
intel_de_write(dev_priv, TRANS_VRR_CTL(cpu_transcoder),
VRR_CTL_VRR_ENABLE | trans_vrr_ctl(crtc_state));
}
@@ -258,13 +274,16 @@ void intel_vrr_disable(const struct intel_crtc_state
*old_crtc_state)
intel_de_wait_for_clear(dev_priv, TRANS_VRR_STATUS(cpu_transcoder),
VRR_STATUS_VRR_EN_LIVE, 1000);
intel_de_write(dev_priv, TRANS_PUSH(cpu_transcoder), 0);
+
+ if (HAS_AS_SDP(dev_priv))
+ intel_de_write(dev_priv, TRANS_VRR_VSYNC(cpu_transcoder), 0);
}
void intel_vrr_get_config(struct intel_crtc_state *crtc_state)
{
struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
- u32 trans_vrr_ctl;
+ u32 trans_vrr_ctl, trans_vrr_vsync;
trans_vrr_ctl = intel_de_read(dev_priv, TRANS_VRR_CTL(cpu_transcoder));
@@ -284,6 +303,16 @@ void intel_vrr_get_config(struct intel_crtc_state
*crtc_state)
crtc_state->vrr.vmin = intel_de_read(dev_priv,
TRANS_VRR_VMIN(cpu_transcoder)) + 1;
}
- if (crtc_state->vrr.enable)
+ if (crtc_state->vrr.enable) {
crtc_state->mode_flags |= I915_MODE_FLAG_VRR;
+
+ if (HAS_AS_SDP(dev_priv)) {
+ trans_vrr_vsync =
+ intel_de_read(dev_priv,
TRANS_VRR_VSYNC(cpu_transcoder));
+ crtc_state->vrr.vsync_start =
+ REG_FIELD_GET(VRR_VSYNC_START_MASK,
trans_vrr_vsync);
+ crtc_state->vrr.vsync_end =
+ REG_FIELD_GET(VRR_VSYNC_END_MASK,
trans_vrr_vsync);
+ }
+ }
}
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 3ff6a38826cb..2ede6982175c 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2095,6 +2095,13 @@
#define TRANS_PUSH_EN REG_BIT(31)
#define TRANS_PUSH_SEND REG_BIT(30)
+#define _TRANS_VRR_VSYNC_A 0x60078
+#define TRANS_VRR_VSYNC(trans) _MMIO_TRANS2(trans, _TRANS_VRR_VSYNC_A)
+#define VRR_VSYNC_END_MASK REG_GENMASK(28, 16)
+#define VRR_VSYNC_END(vsync_end) REG_FIELD_PREP(VRR_VSYNC_END_MASK,
(vsync_end))
+#define VRR_VSYNC_START_MASK REG_GENMASK(12, 0)
+#define VRR_VSYNC_START(vsync_start) REG_FIELD_PREP(VRR_VSYNC_START_MASK,
(vsync_start))
+
/* VGA port control */
#define ADPA _MMIO(0x61100)
#define PCH_ADPA _MMIO(0xe1100)
--
2.25.1
