This patch is applying workaround for underrun on idle PSR HW issue
(Wa_16025596647) when PSR is getting enabled. It uses vblank enable/disable
status, DC5/6 enabled disabled and enabled pipes count information made
available.
This patch is also adding calls to dc5/dc6, vblank enable/disable and pipe
enable/disable notification functions as needed.
intel_psr_needs_block_dc_vblank is modified to get vblank enable/disable
notification on PSR capable system.
Bspec: 74151
Signed-off-by: Jouni Högander <jouni.hogan...@intel.com>
---
drivers/gpu/drm/i915/display/intel_display.c | 4 +
.../drm/i915/display/intel_display_driver.c | 3 +
.../gpu/drm/i915/display/intel_display_irq.c | 9 +-
.../i915/display/intel_display_power_well.c | 4 +
drivers/gpu/drm/i915/display/intel_psr.c | 101 +++++++++++-------
5 files changed, 74 insertions(+), 47 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c
b/drivers/gpu/drm/i915/display/intel_display.c
index f7cb38145e9d..109907d93cf8 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -6656,6 +6656,8 @@ static void intel_enable_crtc(struct intel_atomic_state
*state,
intel_crtc_update_active_timings(pipe_crtc_state, false);
}
+ intel_psr_notify_pipe_change(state, crtc, true);
+
display->funcs.display->crtc_enable(state, crtc);
/* vblanks work again, re-enable pipe CRC. */
@@ -6775,6 +6777,8 @@ static void intel_old_crtc_state_disables(struct
intel_atomic_state *state,
intel_crtc_joined_pipe_mask(old_crtc_state))
intel_crtc_disable_pipe_crc(pipe_crtc);
+ intel_psr_notify_pipe_change(state, crtc, false);
+
display->funcs.display->crtc_disable(state, crtc);
for_each_intel_crtc_in_pipe_mask(display->drm, pipe_crtc,
diff --git a/drivers/gpu/drm/i915/display/intel_display_driver.c
b/drivers/gpu/drm/i915/display/intel_display_driver.c
index 31740a677dd8..b4c989bbac93 100644
--- a/drivers/gpu/drm/i915/display/intel_display_driver.c
+++ b/drivers/gpu/drm/i915/display/intel_display_driver.c
@@ -54,6 +54,7 @@
#include "intel_plane_initial.h"
#include "intel_pmdemand.h"
#include "intel_pps.h"
+#include "intel_psr.h"
#include "intel_quirks.h"
#include "intel_vga.h"
#include "intel_wm.h"
@@ -226,6 +227,8 @@ int intel_display_driver_probe_noirq(struct intel_display
*display)
if (ret)
goto cleanup_bios;
+ intel_psr_dc5_dc6_wa_init(display);
+
/* FIXME: completely on the wrong abstraction layer */
ret = intel_power_domains_init(display);
if (ret < 0)
diff --git a/drivers/gpu/drm/i915/display/intel_display_irq.c
b/drivers/gpu/drm/i915/display/intel_display_irq.c
index aa23bb817805..62fbdcbb4a12 100644
--- a/drivers/gpu/drm/i915/display/intel_display_irq.c
+++ b/drivers/gpu/drm/i915/display/intel_display_irq.c
@@ -1728,14 +1728,7 @@ static void intel_display_vblank_dc_work(struct
work_struct *work)
container_of(work, typeof(*display), irq.vblank_dc_work);
int vblank_wa_num_pipes = READ_ONCE(display->irq.vblank_wa_num_pipes);
- /*
- * NOTE: intel_display_power_set_target_dc_state is used only by PSR
- * code for DC3CO handling. DC3CO target state is currently disabled in
- * PSR code. If DC3CO is taken into use we need take that into account
- * here as well.
- */
- intel_display_power_set_target_dc_state(display, vblank_wa_num_pipes ?
DC_STATE_DISABLE :
- DC_STATE_EN_UPTO_DC6);
+ intel_psr_notify_vblank_enable_disable(display, vblank_wa_num_pipes);
}
int bdw_enable_vblank(struct drm_crtc *_crtc)
diff --git a/drivers/gpu/drm/i915/display/intel_display_power_well.c
b/drivers/gpu/drm/i915/display/intel_display_power_well.c
index 8ec87ffd87d2..510f97341893 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power_well.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power_well.c
@@ -24,6 +24,7 @@
#include "intel_hotplug.h"
#include "intel_pcode.h"
#include "intel_pps.h"
+#include "intel_psr.h"
#include "intel_tc.h"
#include "intel_vga.h"
#include "skl_watermark.h"
@@ -762,6 +763,9 @@ void gen9_set_dc_state(struct intel_display *display, u32
state)
state & ~power_domains->allowed_dc_mask))
state &= power_domains->allowed_dc_mask;
+ if (!power_domains->initializing)
+ intel_psr_notify_dc5_dc6(display);
+
val = intel_de_read(display, DC_STATE_EN);
mask = gen9_dc_mask(display);
drm_dbg_kms(display->drm, "Setting DC state from %02x to %02x\n",
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c
b/drivers/gpu/drm/i915/display/intel_psr.c
index afb9faed7784..2782b84b0d12 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -908,6 +908,41 @@ static u8 psr_compute_idle_frames(struct intel_dp
*intel_dp)
return idle_frames;
}
+/* Wa_16025596647 */
+static void psr1_apply_underrun_on_idle_wa_locked(struct intel_dp *intel_dp,
+ bool dc5_dc6_blocked)
+{
+ struct intel_display *display = to_intel_display(intel_dp);
+ u32 val;
+
+ if (dc5_dc6_blocked)
+ val = DMC_EVT_CTL_ENABLE | DMC_EVT_CTL_RECURRING |
+ REG_FIELD_PREP(DMC_EVT_CTL_TYPE_MASK,
+ DMC_EVT_CTL_TYPE_EDGE_0_1) |
+ REG_FIELD_PREP(DMC_EVT_CTL_EVENT_ID_MASK,
+ DMC_EVT_CTL_EVENT_ID_VBLANK_A);
+ else
+ val = REG_FIELD_PREP(DMC_EVT_CTL_EVENT_ID_MASK,
+ DMC_EVT_CTL_EVENT_ID_FALSE) |
+ REG_FIELD_PREP(DMC_EVT_CTL_TYPE_MASK,
+ DMC_EVT_CTL_TYPE_EDGE_0_1);
+
+ intel_de_write(display, MTL_PIPEDMC_EVT_CTL_4(intel_dp->psr.pipe),
+ val);
+}
+
+static bool is_dc5_dc6_blocked(struct intel_dp *intel_dp)
+{
+ struct intel_display *display = to_intel_display(intel_dp);
+ u32 current_dc_state =
intel_display_power_get_current_dc_state(display);
+ struct drm_vblank_crtc *vblank =
&display->drm->vblank[intel_dp->psr.pipe];
+
+ return (current_dc_state != DC_STATE_EN_UPTO_DC5 &&
+ current_dc_state != DC_STATE_EN_UPTO_DC6) ||
+ intel_dp->psr.active_non_psr_pipes ||
+ READ_ONCE(vblank->enabled);
+}
+
static void hsw_activate_psr1(struct intel_dp *intel_dp)
{
struct intel_display *display = to_intel_display(intel_dp);
@@ -937,6 +972,12 @@ static void hsw_activate_psr1(struct intel_dp *intel_dp)
intel_de_rmw(display, psr_ctl_reg(display, cpu_transcoder),
~EDP_PSR_RESTORE_PSR_ACTIVE_CTX_MASK, val);
+
+ /* Wa_16025596647 */
+ if ((DISPLAY_VER(display) == 20 ||
+ IS_DISPLAY_VERx100_STEP(display, 3000, STEP_A0, STEP_B0)) &&
+ is_dc5_dc6_blocked(intel_dp))
+ psr1_apply_underrun_on_idle_wa_locked(intel_dp, true);
}
static u32 intel_psr2_get_tp_time(struct intel_dp *intel_dp)
@@ -1019,8 +1060,16 @@ static void hsw_activate_psr2(struct intel_dp *intel_dp)
enum transcoder cpu_transcoder = intel_dp->psr.transcoder;
u32 val = EDP_PSR2_ENABLE;
u32 psr_val = 0;
+ u8 idle_frames;
- val |= EDP_PSR2_IDLE_FRAMES(psr_compute_idle_frames(intel_dp));
+ /* Wa_16025596647 */
+ if ((DISPLAY_VER(display) == 20 ||
+ IS_DISPLAY_VERx100_STEP(display, 3000, STEP_A0, STEP_B0)) &&
+ is_dc5_dc6_blocked(intel_dp))
+ idle_frames = 0;
+ else
+ idle_frames = psr_compute_idle_frames(intel_dp);
+ val |= EDP_PSR2_IDLE_FRAMES(idle_frames);
if (DISPLAY_VER(display) < 14 && !IS_ALDERLAKE_P(dev_priv))
val |= EDP_SU_TRACK_ENABLE;
@@ -2101,6 +2150,8 @@ static void intel_psr_exit(struct intel_dp *intel_dp)
drm_WARN_ON(display->drm, !(val & EDP_PSR2_ENABLE));
} else {
+ psr1_apply_underrun_on_idle_wa_locked(intel_dp, false);
+
val = intel_de_rmw(display,
psr_ctl_reg(display, cpu_transcoder),
EDP_PSR_ENABLE, 0);
@@ -2312,6 +2363,7 @@ void intel_psr_resume(struct intel_dp *intel_dp)
bool intel_psr_needs_block_dc_vblank(const struct intel_crtc_state *crtc_state)
{
struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+ struct intel_display *display = to_intel_display(crtc_state);
struct intel_encoder *encoder;
for_each_encoder_on_crtc(crtc->base.dev, &crtc->base, encoder) {
@@ -2322,8 +2374,15 @@ bool intel_psr_needs_block_dc_vblank(const struct
intel_crtc_state *crtc_state)
intel_dp = enc_to_intel_dp(encoder);
- if (intel_dp_is_edp(intel_dp) &&
- CAN_PANEL_REPLAY(intel_dp))
+ if (!intel_dp_is_edp(intel_dp))
+ continue;
+
+ if (CAN_PANEL_REPLAY(intel_dp))
+ return true;
+
+ if ((DISPLAY_VER(display) == 20 ||
+ IS_DISPLAY_VERx100_STEP(display, 3000, STEP_A0, STEP_B0))
&&
+ CAN_PSR(intel_dp))
return true;
}
@@ -3665,42 +3724,6 @@ void intel_psr_unlock(const struct intel_crtc_state
*crtc_state)
}
}
-/* Wa_16025596647 */
-static void psr1_apply_underrun_on_idle_wa_locked(struct intel_dp *intel_dp,
- bool dc5_dc6_blocked)
-{
- struct intel_display *display = to_intel_display(intel_dp);
- u32 val;
-
- if (dc5_dc6_blocked)
- val = DMC_EVT_CTL_ENABLE | DMC_EVT_CTL_RECURRING |
- REG_FIELD_PREP(DMC_EVT_CTL_TYPE_MASK,
- DMC_EVT_CTL_TYPE_EDGE_0_1) |
- REG_FIELD_PREP(DMC_EVT_CTL_EVENT_ID_MASK,
- DMC_EVT_CTL_EVENT_ID_VBLANK_A);
- else
- val = REG_FIELD_PREP(DMC_EVT_CTL_EVENT_ID_MASK,
- DMC_EVT_CTL_EVENT_ID_FALSE) |
- REG_FIELD_PREP(DMC_EVT_CTL_TYPE_MASK,
- DMC_EVT_CTL_TYPE_EDGE_0_1);
-
- intel_de_write(display, MTL_PIPEDMC_EVT_CTL_4(intel_dp->psr.pipe),
- val);
-}
-
-/* Wa_16025596647 */
-static bool is_dc5_dc6_blocked(struct intel_dp *intel_dp)
-{
- struct intel_display *display = to_intel_display(intel_dp);
- u32 current_dc_state =
intel_display_power_get_current_dc_state(display);
- struct drm_vblank_crtc *vblank =
&display->drm->vblank[intel_dp->psr.pipe];
-
- return (current_dc_state != DC_STATE_EN_UPTO_DC5 &&
- current_dc_state != DC_STATE_EN_UPTO_DC6) ||
- intel_dp->psr.active_non_psr_pipes ||
- READ_ONCE(vblank->enabled);
-}
-
/* Wa_16025596647 */
static void intel_psr_apply_underrun_on_idle_wa_locked(struct intel_dp
*intel_dp)
{
--
2.43.0
