@@ -6447,6 +6447,9 @@ static void haswell_crtc_enable(struct intel_crtc_state *pipe_config,
if (WARN_ON(intel_crtc->active))
return;
+ /* Enable PSR2 transcoder exit line */
+ if (pipe_config->has_psr2 && dev_priv->csr.prefer_dc3co)
+ tgl_enable_psr2_transcoder_exitline(pipe_config);
intel_encoders_pre_pll_enable(intel_crtc, pipe_config, state);
@@ -13667,6 +13670,8 @@ static int intel_atomic_check(struct drm_device *dev,
"[modeset]" : "[fastset]");
}
+ tgl_prefer_dc3co_over_dc5_check(dev_priv, state);
+
return 0;
fail:
@@ -18,6 +18,7 @@
#include "intel_hotplug.h"
#include "intel_sideband.h"
#include "intel_tc.h"
+#include "intel_pm.h"
bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv,
enum i915_power_well_id power_well_id);
@@ -788,6 +789,98 @@ static void gen9_set_dc_state(struct drm_i915_private *dev_priv, u32 state)
dev_priv->csr.dc_state = val & mask;
}
+void tgl_enable_psr2_transcoder_exitline(struct intel_crtc_state *cstate)
+{
+ u32 linetime_us, val, exit_scanlines;
+ u32 crtc_vdisplay = cstate->base.adjusted_mode.crtc_vdisplay;
+ struct drm_i915_private *dev_priv = to_i915(cstate->base.crtc->dev);
+
+ if (WARN_ON(cstate->cpu_transcoder != TRANSCODER_A))
+ return;
+
+ linetime_us = fixed16_to_u32_round_up(intel_get_linetime_us(cstate));
+ if (WARN_ON(!linetime_us))
+ return;
+ /*
+ * DC3CO Exit time 200us B.Spec 49196
+ * PSR2 transcoder Early Exit scanlines = ROUNDUP(200 / line time) + 1
+ * Exit line event need to program above calculated scan lines before
+ * next VBLANK.
+ */
+ exit_scanlines = DIV_ROUND_UP(200, linetime_us) + 1;
+ if (WARN_ON(exit_scanlines > crtc_vdisplay))
+ return;
+
+ exit_scanlines = crtc_vdisplay - exit_scanlines;
+ exit_scanlines <<= EXITLINE_SHIFT;
+ val = I915_READ(EXITLINE(cstate->cpu_transcoder));
+ val &= ~(EXITLINE_MASK | EXITLINE_ENABLE);
+ val |= exit_scanlines;
+ val |= EXITLINE_ENABLE;
+ I915_WRITE(EXITLINE(cstate->cpu_transcoder), val);
+}
+
+static bool tgl_is_only_edp_connected(struct intel_crtc_state *crtc_state)
+{
+ struct drm_atomic_state *state = crtc_state->base.state;
+ struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+ struct drm_connector *connector, *edp_connector = NULL;
+ struct drm_connector_state *connector_state;
+ int i;
+
+ for_each_new_connector_in_state(state, connector, connector_state, i) {
+ if (connector_state->crtc != &crtc->base)
+ continue;
+
+ if (connector->status == connector_status_connected &&
+ connector->connector_type != DRM_MODE_CONNECTOR_eDP)
+ return false;
+ else if (connector->connector_type == DRM_MODE_CONNECTOR_eDP &&
+ connector->status == connector_status_connected)
+ edp_connector = connector;
+ }
+
+ if (edp_connector)
+ return true;
+
+ return false;
+}
+
+/*
+ * tgl_prefer_dc3co_over_dc5_check check whether it is worth to choose
+ * DC3CO over DC5. Currently it just check crtc psr2 capebilty and only
+ * edp display should be connected.
+ * TODO: Prefer DC3CO over DC5 only in video playback.
+ */
+void tgl_prefer_dc3co_over_dc5_check(struct drm_i915_private *dev_priv,
+ struct intel_atomic_state *state)
+{
+ struct intel_crtc_state *crtc_state;
+ struct intel_crtc *crtc;
+ int i;
+
+ dev_priv->csr.prefer_dc3co = false;
+
+ if (!IS_TIGERLAKE(dev_priv))
+ return;
+
+ for_each_new_intel_crtc_in_state(state, crtc, crtc_state, i) {
+ if (!crtc_state->has_psr2 && crtc_state->base.active) {
+ dev_priv->csr.prefer_dc3co = false;
+ return;
+ } else if (crtc_state->has_psr2) {
+ if (tgl_is_only_edp_connected(crtc_state) &&
+ crtc_state->base.active) {
+ dev_priv->csr.prefer_dc3co = true;
+ continue;
+ } else {
+ dev_priv->csr.prefer_dc3co = false;
+ return;
+ }
+ }
+ }
+}
+
static void tgl_allow_dc3co(struct drm_i915_private *dev_priv)
{
gen9_set_dc_state(dev_priv, DC_STATE_EN_DC3CO);
@@ -12,6 +12,8 @@
struct drm_i915_private;
struct intel_encoder;
+struct intel_crtc_state;
+struct intel_atomic_state;
enum intel_display_power_domain {
POWER_DOMAIN_DISPLAY_CORE,
@@ -252,6 +254,9 @@ void hsw_enable_pc8(struct drm_i915_private *dev_priv);
void hsw_disable_pc8(struct drm_i915_private *dev_priv);
void bxt_display_core_init(struct drm_i915_private *dev_priv, bool resume);
void bxt_display_core_uninit(struct drm_i915_private *dev_priv);
+void tgl_prefer_dc3co_over_dc5_check(struct drm_i915_private *dev_priv,
+ struct intel_atomic_state *state);
+void tgl_enable_psr2_transcoder_exitline(struct intel_crtc_state *cstate);
const char *
intel_display_power_domain_str(struct drm_i915_private *i915,
@@ -359,6 +359,7 @@ struct intel_csr {
u32 dc_state;
u32 allowed_dc_mask;
intel_wakeref_t wakeref;
+ bool prefer_dc3co;
};
enum i915_cache_level {
@@ -4583,7 +4583,7 @@ skl_wm_method2(u32 pixel_rate, u32 pipe_htotal, u32 latency,
return ret;
}
-static uint_fixed_16_16_t
+uint_fixed_16_16_t
intel_get_linetime_us(const struct intel_crtc_state *crtc_state)
{
u32 pixel_rate;
@@ -8,6 +8,7 @@
#include <linux/types.h>
+#include "i915_drv.h"
#include "i915_reg.h"
struct drm_device;
@@ -76,6 +77,7 @@ u64 intel_rc6_residency_ns(struct drm_i915_private *dev_priv, i915_reg_t reg);
u64 intel_rc6_residency_us(struct drm_i915_private *dev_priv, i915_reg_t reg);
u32 intel_get_cagf(struct drm_i915_private *dev_priv, u32 rpstat1);
+uint_fixed_16_16_t intel_get_linetime_us(const struct intel_crtc_state *cstate);
unsigned long i915_chipset_val(struct drm_i915_private *dev_priv);
unsigned long i915_mch_val(struct drm_i915_private *dev_priv);
This patch check if it is only edp display connected and crtc has psr2 capability, then it sets the prefer_dc3co flag to true. It also enable DC3CO PSR2 transcoder early exitline event in haswell_crtc_enable() function. TODO: B. Specs says dc3co should be allow only in video playback case, currently driver doesn't differentiate between video playback and a normal flip. User space will be the best to judge if it is VPB case otherwise we need to have that intelligence in driver. Cc: jani.nikula@intel.com Cc: imre.deak@intel.com Cc: animesh.manna@intel.com Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com> --- drivers/gpu/drm/i915/display/intel_display.c | 5 + .../drm/i915/display/intel_display_power.c | 93 +++++++++++++++++++ .../drm/i915/display/intel_display_power.h | 5 + drivers/gpu/drm/i915/i915_drv.h | 1 + drivers/gpu/drm/i915/intel_pm.c | 2 +- drivers/gpu/drm/i915/intel_pm.h | 2 + 6 files changed, 107 insertions(+), 1 deletion(-)