/** * DOC: Panel Self Refresh (PSR/SRD) * * Since Haswell Display controller supports Panel Self-Refresh on display * panels witch have a remote frame buffer (RFB) implemented according to PSR * spec in eDP1.3. PSR feature allows the display to go to lower standby states * when system is idle but display is on as it eliminates display refresh * request to DDR memory completely as long as the frame buffer for that * display is unchanged. * * Panel Self Refresh must be supported by both Hardware (source) and * Panel (sink). * * PSR saves power by caching the framebuffer in the panel RFB, which allows us * to power down the link and memory controller. For DSI panels the same idea * is called "manual mode". * * The implementation uses the hardware-based PSR support which automatically * enters/exits self-refresh mode. The hardware takes care of sending the * required DP aux message and could even retrain the link (that part isn't * enabled yet though). The hardware also keeps track of any frontbuffer * changes to know when to exit self-refresh mode again. Unfortunately that * part doesn't work too well, hence why the i915 PSR support uses the * software frontbuffer tracking to make sure it doesn't miss a screen * update. For this integration intel_psr_invalidate() and intel_psr_flush() * get called by the frontbuffer tracking code. Note that because of locking * issues the self-refresh re-enable code is done from a work queue, which * must be correctly synchronized/cancelled when shutting down the pipe." * * DC3CO (DC3 clock off) * * On top of PSR2, GEN12 adds a intermediate power savings state that turns * clock off automatically during PSR2 idle state. * The smaller overhead of DC3co entry/exit vs. the overhead of PSR2 deep sleep * entry/exit allows the HW to enter a low-power state even when page flipping * periodically (for instance a 30fps video playback scenario). * * Every time a flips occurs PSR2 will get out of deep sleep state(if it was), * so DC3CO is enabled and tgl_dc3co_disable_work is schedule to run after 6 * frames, if no other flip occurs and the function above is executed, DC3CO is * disabled and PSR2 is configured to enter deep sleep, resetting again in case * of another flip. * Front buffer modifications do not trigger DC3CO activation on purpose as it * would bring a lot of complexity and most of the moderns systems will only * use page flips.
*/
/* * Description of PSR mask bits: * * EDP_PSR_DEBUG[16]/EDP_PSR_DEBUG_MASK_DISP_REG_WRITE (hsw-skl): * * When unmasked (nearly) all display register writes (eg. even * SWF) trigger a PSR exit. Some registers are excluded from this * and they have a more specific mask (described below). On icl+ * this bit no longer exists and is effectively always set. * * PIPE_MISC[21]/PIPE_MISC_PSR_MASK_PIPE_REG_WRITE (skl+): * * When unmasked (nearly) all pipe/plane register writes * trigger a PSR exit. Some plane registers are excluded from this * and they have a more specific mask (described below). * * CHICKEN_PIPESL_1[11]/SKL_PSR_MASK_PLANE_FLIP (skl+): * PIPE_MISC[23]/PIPE_MISC_PSR_MASK_PRIMARY_FLIP (bdw): * EDP_PSR_DEBUG[23]/EDP_PSR_DEBUG_MASK_PRIMARY_FLIP (hsw): * * When unmasked PRI_SURF/PLANE_SURF writes trigger a PSR exit. * SPR_SURF/CURBASE are not included in this and instead are * controlled by PIPE_MISC_PSR_MASK_PIPE_REG_WRITE (skl+) or * EDP_PSR_DEBUG_MASK_DISP_REG_WRITE (hsw/bdw). * * PIPE_MISC[22]/PIPE_MISC_PSR_MASK_SPRITE_ENABLE (bdw): * EDP_PSR_DEBUG[21]/EDP_PSR_DEBUG_MASK_SPRITE_ENABLE (hsw): * * When unmasked PSR is blocked as long as the sprite * plane is enabled. skl+ with their universal planes no * longer have a mask bit like this, and no plane being * enabledb blocks PSR. * * PIPE_MISC[21]/PIPE_MISC_PSR_MASK_CURSOR_MOVE (bdw): * EDP_PSR_DEBUG[20]/EDP_PSR_DEBUG_MASK_CURSOR_MOVE (hsw): * * When umasked CURPOS writes trigger a PSR exit. On skl+ * this doesn't exit but CURPOS is included in the * PIPE_MISC_PSR_MASK_PIPE_REG_WRITE mask. * * PIPE_MISC[20]/PIPE_MISC_PSR_MASK_VBLANK_VSYNC_INT (bdw+): * EDP_PSR_DEBUG[19]/EDP_PSR_DEBUG_MASK_VBLANK_VSYNC_INT (hsw): * * When unmasked PSR is blocked as long as vblank and/or vsync * interrupt is unmasked in IMR *and* enabled in IER. * * CHICKEN_TRANS[30]/SKL_UNMASK_VBL_TO_PIPE_IN_SRD (skl+): * CHICKEN_PAR1_1[15]/HSW_MASK_VBL_TO_PIPE_IN_SRD (hsw/bdw): * * Selectcs whether PSR exit generates an extra vblank before * the first frame is transmitted. Also note the opposite polarity * if the bit on hsw/bdw vs. skl+ (masked==generate the extra vblank, * unmasked==do not generate the extra vblank). * * With DC states enabled the extra vblank happens after link training, * with DC states disabled it happens immediately upuon PSR exit trigger. * No idea as of now why there is a difference. HSW/BDW (which don't * even have DMC) always generate it after link training. Go figure. * * Unfortunately CHICKEN_TRANS itself seems to be double buffered * and thus won't latch until the first vblank. So with DC states * enabled the register effectively uses the reset value during DC5 * exit+PSR exit sequence, and thus the bit does nothing until * latched by the vblank that it was trying to prevent from being * generated in the first place. So we should probably call this * one a chicken/egg bit instead on skl+. * * In standby mode (as opposed to link-off) this makes no difference * as the timing generator keeps running the whole time generating * normal periodic vblanks. * * WaPsrDPAMaskVBlankInSRD asks us to set the bit on hsw/bdw, * and doing so makes the behaviour match the skl+ reset value. * * CHICKEN_PIPESL_1[0]/BDW_UNMASK_VBL_TO_REGS_IN_SRD (bdw): * CHICKEN_PIPESL_1[15]/HSW_UNMASK_VBL_TO_REGS_IN_SRD (hsw): * * On BDW without this bit is no vblanks whatsoever are * generated after PSR exit. On HSW this has no apparent effect. * WaPsrDPRSUnmaskVBlankInSRD says to set this. * * The rest of the bits are more self-explanatory and/or * irrelevant for normal operation. * * Description of intel_crtc_state variables. has_psr, has_panel_replay and * has_sel_update: * * has_psr (alone): PSR1 * has_psr + has_sel_update: PSR2 * has_psr + has_panel_replay: Panel Replay * has_psr + has_panel_replay + has_sel_update: Panel Replay Selective Update * * Description of some intel_psr variables. enabled, panel_replay_enabled, * sel_update_enabled * * enabled (alone): PSR1 * enabled + sel_update_enabled: PSR2 * enabled + panel_replay_enabled: Panel Replay * enabled + panel_replay_enabled + sel_update_enabled: Panel Replay SU
*/
bool intel_psr_needs_aux_io_power(struct intel_encoder *encoder, conststruct intel_crtc_state *crtc_state)
{ /* * For PSR/PR modes only eDP requires the AUX IO power to be enabled whenever * the output is enabled. For non-eDP outputs the main link is always * on, hence it doesn't require the HW initiated AUX wake-up signaling used * for eDP. * * TODO: * - Consider leaving AUX IO disabled for eDP / PR as well, in case * the ALPM with main-link off mode is not enabled. * - Leave AUX IO enabled for DP / PR, once support for ALPM with * main-link off mode is added for it and this mode gets enabled.
*/ return intel_crtc_has_type(crtc_state, INTEL_OUTPUT_EDP) &&
intel_encoder_can_psr(encoder);
}
if (psr_iir & psr_irq_psr_error_bit_get(intel_dp)) {
drm_warn(display->drm, "[transcoder %s] PSR aux error\n",
transcoder_name(cpu_transcoder));
intel_dp->psr.irq_aux_error = true;
/* * If this interruption is not masked it will keep * interrupting so fast that it prevents the scheduled * work to run. * Also after a PSR error, we don't want to arm PSR * again so we don't care about unmask the interruption * or unset irq_aux_error.
*/
intel_de_rmw(display, psr_imr_reg(display, cpu_transcoder),
0, psr_irq_psr_error_bit_get(intel_dp));
static u8 intel_dp_get_sink_sync_latency(struct intel_dp *intel_dp)
{ struct intel_display *display = to_intel_display(intel_dp);
u8 val = 8; /* assume the worst if we can't read the value */
if (drm_dp_dpcd_readb(&intel_dp->aux,
DP_SYNCHRONIZATION_LATENCY_IN_SINK, &val) == 1)
val &= DP_MAX_RESYNC_FRAME_COUNT_MASK; else
drm_dbg_kms(display->drm, "Unable to get sink synchronization latency, assuming 8 frames\n"); return val;
}
/* * Note: Bits related to granularity are same in panel replay and psr * registers. Rely on PSR definitions on these "common" bits.
*/ staticvoid intel_dp_get_su_granularity(struct intel_dp *intel_dp)
{ struct intel_display *display = to_intel_display(intel_dp);
ssize_t r;
u16 w;
u8 y;
/* * TODO: Do we need to take into account panel supporting both PSR and * Panel replay?
*/
/* * If sink don't have specific granularity requirements set legacy * ones.
*/ if (!(intel_dp_get_su_capability(intel_dp) &
DP_PSR2_SU_GRANULARITY_REQUIRED)) { /* As PSR2 HW sends full lines, we do not care about x granularity */
w = 4;
y = 4; gotoexit;
}
r = drm_dp_dpcd_read(&intel_dp->aux,
intel_dp_get_su_x_granularity_offset(intel_dp),
&w, 2); if (r != 2)
drm_dbg_kms(display->drm, "Unable to read selective update x granularity\n"); /* * Spec says that if the value read is 0 the default granularity should * be used instead.
*/ if (r != 2 || w == 0)
w = 4;
r = drm_dp_dpcd_read(&intel_dp->aux,
intel_dp_get_su_y_granularity_offset(intel_dp),
&y, 1); if (r != 1) {
drm_dbg_kms(display->drm, "Unable to read selective update y granularity\n");
y = 4;
} if (y == 0)
y = 1;
if (intel_dp_is_edp(intel_dp)) { if (!intel_alpm_aux_less_wake_supported(intel_dp)) {
drm_dbg_kms(display->drm, "Panel doesn't support AUX-less ALPM, eDP Panel Replay not possible\n"); return;
}
if (!(intel_dp->pr_dpcd[INTEL_PR_DPCD_INDEX(DP_PANEL_REPLAY_CAP_SUPPORT)] &
DP_PANEL_REPLAY_EARLY_TRANSPORT_SUPPORT)) {
drm_dbg_kms(display->drm, "Panel doesn't support early transport, eDP Panel Replay not possible\n"); return;
}
}
intel_dp->psr.sink_panel_replay_support = true;
if (intel_dp->pr_dpcd[INTEL_PR_DPCD_INDEX(DP_PANEL_REPLAY_CAP_SUPPORT)] &
DP_PANEL_REPLAY_SU_SUPPORT)
intel_dp->psr.sink_panel_replay_su_support = true;
drm_dbg_kms(display->drm, "eDP panel supports PSR version %x\n",
intel_dp->psr_dpcd[0]);
if (drm_dp_has_quirk(&intel_dp->desc, DP_DPCD_QUIRK_NO_PSR)) {
drm_dbg_kms(display->drm, "PSR support not currently available for this panel\n"); return;
}
if (!(intel_dp->edp_dpcd[1] & DP_EDP_SET_POWER_CAP)) {
drm_dbg_kms(display->drm, "Panel lacks power state control, PSR cannot be enabled\n"); return;
}
/* * All panels that supports PSR version 03h (PSR2 + * Y-coordinate) can handle Y-coordinates in VSC but we are * only sure that it is going to be used when required by the * panel. This way panel is capable to do selective update * without a aux frame sync. * * To support PSR version 02h and PSR version 03h without * Y-coordinate requirement panels we would need to enable * GTC first.
*/
intel_dp->psr.sink_psr2_support = y_req &&
intel_alpm_aux_wake_supported(intel_dp);
drm_dbg_kms(display->drm, "PSR2 %ssupported\n",
intel_dp->psr.sink_psr2_support ? "" : "not ");
}
}
BUILD_BUG_ON(sizeof(aux_msg) > 20); for (i = 0; i < sizeof(aux_msg); i += 4)
intel_de_write(display,
psr_aux_data_reg(display, cpu_transcoder, i >> 2),
intel_dp_aux_pack(&aux_msg[i], sizeof(aux_msg) - i));
if (crtc_state->has_sel_update) {
val |= DP_PSR_ENABLE_PSR2 | DP_PSR_IRQ_HPD_WITH_CRC_ERRORS;
} else { if (intel_dp->psr.link_standby)
val |= DP_PSR_MAIN_LINK_ACTIVE;
if (DISPLAY_VER(display) >= 8)
val |= DP_PSR_CRC_VERIFICATION;
}
if (crtc_state->req_psr2_sdp_prior_scanline)
val |= DP_PSR_SU_REGION_SCANLINE_CAPTURE;
if (crtc_state->enable_psr2_su_region_et)
val |= DP_PANEL_REPLAY_ENABLE_SU_REGION_ET;
if (intel_dp->psr.entry_setup_frames > 0)
val |= DP_PSR_FRAME_CAPTURE;
drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG, val);
val |= DP_PSR_ENABLE;
drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG, val);
}
if (DISPLAY_VER(display) >= 11)
val |= EDP_PSR_TP4_TIME_0us;
if (display->params.psr_safest_params) {
val |= EDP_PSR_TP1_TIME_2500us;
val |= EDP_PSR_TP2_TP3_TIME_2500us; goto check_tp3_sel;
}
if (connector->panel.vbt.psr.tp1_wakeup_time_us == 0)
val |= EDP_PSR_TP1_TIME_0us; elseif (connector->panel.vbt.psr.tp1_wakeup_time_us <= 100)
val |= EDP_PSR_TP1_TIME_100us; elseif (connector->panel.vbt.psr.tp1_wakeup_time_us <= 500)
val |= EDP_PSR_TP1_TIME_500us; else
val |= EDP_PSR_TP1_TIME_2500us;
if (connector->panel.vbt.psr.tp2_tp3_wakeup_time_us == 0)
val |= EDP_PSR_TP2_TP3_TIME_0us; elseif (connector->panel.vbt.psr.tp2_tp3_wakeup_time_us <= 100)
val |= EDP_PSR_TP2_TP3_TIME_100us; elseif (connector->panel.vbt.psr.tp2_tp3_wakeup_time_us <= 500)
val |= EDP_PSR_TP2_TP3_TIME_500us; else
val |= EDP_PSR_TP2_TP3_TIME_2500us;
/* * WA 0479: hsw,bdw * "Do not skip both TP1 and TP2/TP3"
*/ if (DISPLAY_VER(display) < 9 &&
connector->panel.vbt.psr.tp1_wakeup_time_us == 0 &&
connector->panel.vbt.psr.tp2_tp3_wakeup_time_us == 0)
val |= EDP_PSR_TP2_TP3_TIME_100us;
check_tp3_sel: if (intel_dp_source_supports_tps3(display) &&
drm_dp_tps3_supported(intel_dp->dpcd))
val |= EDP_PSR_TP_TP1_TP3; else
val |= EDP_PSR_TP_TP1_TP2;
/* Let's use 6 as the minimum to cover all known cases including the * off-by-one issue that HW has in some cases.
*/
idle_frames = max(6, connector->panel.vbt.psr.idle_frames);
idle_frames = max(idle_frames, intel_dp->psr.sink_sync_latency + 1);
if (drm_WARN_ON(display->drm, idle_frames > 0xf))
idle_frames = 0xf;
/* Entry setup frames must be at least 1 less than frames before SU entry */ if (intel_dp->psr.entry_setup_frames >= frames_before_su_entry)
frames_before_su_entry = intel_dp->psr.entry_setup_frames + 1;
if (intel_dp->psr.su_region_et_enabled)
val |= LNL_EDP_PSR2_SU_REGION_ET_ENABLE;
/* * PSR2 HW is incorrectly using EDP_PSR_TP1_TP3_SEL and BSpec is * recommending keep this bit unset while PSR2 is enabled.
*/
intel_de_write(display, psr_ctl_reg(display, cpu_transcoder), psr_val);
/* * FIXME: Due to the changed sequence of activating/deactivating DC3CO, * disable DC3CO until the changed dc3co activating/deactivating sequence * is applied. B.Specs:49196
*/ return;
/* * DMC's DC3CO exit mechanism has an issue with Selective Fecth * TODO: when the issue is addressed, this restriction should be removed.
*/ if (crtc_state->enable_psr2_sel_fetch) return;
if (!(power_domains->allowed_dc_mask & DC_STATE_EN_DC3CO)) return;
if (!dc3co_is_pipe_port_compatible(intel_dp, crtc_state)) return;
/* Wa_16011303918:adl-p */ if (display->platform.alderlake_p && IS_DISPLAY_STEP(display, STEP_A0, STEP_B0)) return;
/* * DC3CO Exit time 200us B.Spec 49196 * PSR2 transcoder Early Exit scanlines = ROUNDUP(200 / line time) + 1
*/
exit_scanlines =
intel_usecs_to_scanlines(&crtc_state->uapi.adjusted_mode, 200) + 1;
if (drm_WARN_ON(display->drm, exit_scanlines > crtc_vdisplay)) return;
if (!display->params.enable_psr2_sel_fetch &&
intel_dp->psr.debug != I915_PSR_DEBUG_ENABLE_SEL_FETCH) {
drm_dbg_kms(display->drm, "PSR2 sel fetch not enabled, disabled by parameter\n"); returnfalse;
}
if (crtc_state->uapi.async_flip) {
drm_dbg_kms(display->drm, "PSR2 sel fetch not enabled, async flip enabled\n"); returnfalse;
}
/* PSR2 HW only send full lines so we only need to validate the width */ if (crtc_hdisplay % intel_dp->psr.su_w_granularity) returnfalse;
if (crtc_vdisplay % intel_dp->psr.su_y_granularity) returnfalse;
/* HW tracking is only aligned to 4 lines */ if (!crtc_state->enable_psr2_sel_fetch) return intel_dp->psr.su_y_granularity == 4;
/* * adl_p and mtl platforms have 1 line granularity. * For other platforms with SW tracking we can adjust the y coordinates * to match sink requirement if multiple of 4.
*/ if (display->platform.alderlake_p || DISPLAY_VER(display) >= 14)
y_granularity = intel_dp->psr.su_y_granularity; elseif (intel_dp->psr.su_y_granularity <= 2)
y_granularity = 4; elseif ((intel_dp->psr.su_y_granularity % 4) == 0)
y_granularity = intel_dp->psr.su_y_granularity;
if (y_granularity == 0 || crtc_vdisplay % y_granularity) returnfalse;
if (crtc_state->dsc.compression_enable &&
vdsc_cfg->slice_height % y_granularity) returnfalse;
if (!intel_alpm_compute_params(intel_dp, crtc_state)) {
drm_dbg_kms(display->drm, "PSR2/Panel Replay not enabled, Unable to use long enough wake times\n"); returnfalse;
}
if (!wake_lines_fit_into_vblank(intel_dp, crtc_state, aux_less)) {
drm_dbg_kms(display->drm, "PSR2/Panel Replay not enabled, too short vblank time\n"); returnfalse;
}
if (!intel_dp->psr.sink_psr2_support) returnfalse;
/* JSL and EHL only supports eDP 1.3 */ if (display->platform.jasperlake || display->platform.elkhartlake) {
drm_dbg_kms(display->drm, "PSR2 not supported by phy\n"); returnfalse;
}
/* Wa_16011181250 */ if (display->platform.rocketlake || display->platform.alderlake_s ||
display->platform.dg2) {
drm_dbg_kms(display->drm, "PSR2 is defeatured for this platform\n"); returnfalse;
}
if (display->platform.alderlake_p && IS_DISPLAY_STEP(display, STEP_A0, STEP_B0)) {
drm_dbg_kms(display->drm, "PSR2 not completely functional in this stepping\n"); returnfalse;
}
if (!transcoder_has_psr2(display, crtc_state->cpu_transcoder)) {
drm_dbg_kms(display->drm, "PSR2 not supported in transcoder %s\n",
transcoder_name(crtc_state->cpu_transcoder)); returnfalse;
}
/* * DSC and PSR2 cannot be enabled simultaneously. If a requested * resolution requires DSC to be enabled, priority is given to DSC * over PSR2.
*/ if (crtc_state->dsc.compression_enable &&
(DISPLAY_VER(display) < 14 && !display->platform.alderlake_p)) {
drm_dbg_kms(display->drm, "PSR2 cannot be enabled since DSC is enabled\n"); returnfalse;
}
if (HAS_PSR2_SEL_FETCH(display) &&
!intel_psr2_sel_fetch_config_valid(intel_dp, crtc_state) &&
!HAS_PSR_HW_TRACKING(display)) {
drm_dbg_kms(display->drm, "Selective update not enabled, selective fetch not valid and no HW tracking available\n"); goto unsupported;
}
if (!psr2_global_enabled(intel_dp)) {
drm_dbg_kms(display->drm, "Selective update disabled by flag\n"); goto unsupported;
}
if (!crtc_state->has_panel_replay && !intel_psr2_config_valid(intel_dp, crtc_state)) goto unsupported;
if (!_compute_psr2_sdp_prior_scanline_indication(intel_dp, crtc_state)) {
drm_dbg_kms(display->drm, "Selective update not enabled, SDP indication do not fit in hblank\n"); goto unsupported;
}
if (crtc_state->has_panel_replay && (DISPLAY_VER(display) < 14 ||
!intel_dp->psr.sink_panel_replay_su_support)) goto unsupported;
if (crtc_state->crc_enabled) {
drm_dbg_kms(display->drm, "Selective update not enabled because it would inhibit pipe CRC calculation\n"); goto unsupported;
}
if (!psr2_granularity_check(intel_dp, crtc_state)) {
drm_dbg_kms(display->drm, "Selective update not enabled, SU granularity not compatible\n"); goto unsupported;
}
if (!panel_replay_global_enabled(intel_dp)) {
drm_dbg_kms(display->drm, "Panel Replay disabled by flag\n"); returnfalse;
}
if (crtc_state->crc_enabled) {
drm_dbg_kms(display->drm, "Panel Replay not enabled because it would inhibit pipe CRC calculation\n"); returnfalse;
}
if (!intel_dp_is_edp(intel_dp)) returntrue;
/* Remaining checks are for eDP only */
if (to_intel_crtc(crtc_state->uapi.crtc)->pipe != PIPE_A &&
to_intel_crtc(crtc_state->uapi.crtc)->pipe != PIPE_B) returnfalse;
/* 128b/132b Panel Replay is not supported on eDP */ if (intel_dp_is_uhbr(crtc_state)) {
drm_dbg_kms(display->drm, "Panel Replay is not supported with 128b/132b\n"); returnfalse;
}
/* HW will not allow Panel Replay on eDP when HDCP enabled */ if (conn_state->content_protection ==
DRM_MODE_CONTENT_PROTECTION_DESIRED ||
(conn_state->content_protection ==
DRM_MODE_CONTENT_PROTECTION_ENABLED && hdcp->value ==
DRM_MODE_CONTENT_PROTECTION_UNDESIRED)) {
drm_dbg_kms(display->drm, "Panel Replay is not supported with HDCP\n"); returnfalse;
}
if (!alpm_config_valid(intel_dp, crtc_state, true)) returnfalse;
/* * FIXME figure out what is wrong with PSR+joiner and * fix it. Presumably something related to the fact that * PSR is a transcoder level feature.
*/ if (crtc_state->joiner_pipes) {
drm_dbg_kms(display->drm, "PSR disabled due to joiner\n"); return;
}
/* Wa_18037818876 */ if (intel_psr_needs_wa_18037818876(intel_dp, crtc_state)) {
crtc_state->has_psr = false;
drm_dbg_kms(display->drm, "PSR disabled to workaround PSR FSM hang issue\n");
}
/* Rest is for Wa_16025596647 */ if (DISPLAY_VER(display) != 20 &&
!IS_DISPLAY_VERx100_STEP(display, 3000, STEP_A0, STEP_B0)) return;
/* Not needed by Panel Replay */ if (crtc_state->has_panel_replay) return;
/* We ignore possible secondary PSR/Panel Replay capable eDP */
for_each_intel_crtc(display->drm, crtc)
active_pipes |= crtc->active ? BIT(crtc->pipe) : 0;
intel_dp = &dig_port->dp; if (!(CAN_PSR(intel_dp) || CAN_PANEL_REPLAY(intel_dp))) return;
mutex_lock(&intel_dp->psr.lock); if (!intel_dp->psr.enabled) goto unlock;
if (intel_dp->psr.panel_replay_enabled) {
pipe_config->has_psr = pipe_config->has_panel_replay = true;
} else { /* * Not possible to read EDP_PSR/PSR2_CTL registers as it is * enabled/disabled because of frontbuffer tracking and others.
*/
pipe_config->has_psr = true;
}
/* * Only HSW and BDW have PSR AUX registers that need to be setup. * SKL+ use hardcoded values PSR AUX transactions
*/ if (DISPLAY_VER(display) < 9)
hsw_psr_setup_aux(intel_dp);
/* * Per Spec: Avoid continuous PSR exit by masking MEMUP and HPD also * mask LPSP to avoid dependency on other drivers that might block * runtime_pm besides preventing other hw tracking issues now we * can rely on frontbuffer tracking. * * From bspec prior LunarLake: * Only PSR_MASK[Mask FBC modify] and PSR_MASK[Mask Hotplug] are used in * panel replay mode. * * From bspec beyod LunarLake: * Panel Replay on DP: No bits are applicable * Panel Replay on eDP: All bits are applicable
*/ if (DISPLAY_VER(display) < 20 || intel_dp_is_edp(intel_dp))
mask = EDP_PSR_DEBUG_MASK_HPD;
if (intel_dp_is_edp(intel_dp)) {
mask |= EDP_PSR_DEBUG_MASK_MEMUP;
/* * For some unknown reason on HSW non-ULT (or at least on * Dell Latitude E6540) external displays start to flicker * when PSR is enabled on the eDP. SR/PC6 residency is much * higher than should be possible with an external display. * As a workaround leave LPSP unmasked to prevent PSR entry * when external displays are active.
*/ if (DISPLAY_VER(display) >= 8 || display->platform.haswell_ult)
mask |= EDP_PSR_DEBUG_MASK_LPSP;
if (DISPLAY_VER(display) < 20)
mask |= EDP_PSR_DEBUG_MASK_MAX_SLEEP;
/* * No separate pipe reg write mask on hsw/bdw, so have to unmask all * registers in order to keep the CURSURFLIVE tricks working :(
*/ if (IS_DISPLAY_VER(display, 9, 10))
mask |= EDP_PSR_DEBUG_MASK_DISP_REG_WRITE;
/* allow PSR with sprite enabled */ if (display->platform.haswell)
mask |= EDP_PSR_DEBUG_MASK_SPRITE_ENABLE;
}
/* * TODO: if future platforms supports DC3CO in more than one * transcoder, EXITLINE will need to be unset when disabling PSR
*/ if (intel_dp->psr.dc3co_exitline)
intel_de_rmw(display,
TRANS_EXITLINE(display, cpu_transcoder),
EXITLINE_MASK,
intel_dp->psr.dc3co_exitline << EXITLINE_SHIFT | EXITLINE_ENABLE);
if (intel_dp->psr.sel_update_enabled) { if (DISPLAY_VER(display) == 9)
intel_de_rmw(display, CHICKEN_TRANS(display, cpu_transcoder), 0,
PSR2_VSC_ENABLE_PROG_HEADER |
PSR2_ADD_VERTICAL_LINE_COUNT);
/* * Wa_16014451276:adlp,mtl[a0,b0] * All supported adlp panels have 1-based X granularity, this may * cause issues if non-supported panels are used.
*/ if (!intel_dp->psr.panel_replay_enabled &&
(IS_DISPLAY_VERx100_STEP(display, 1400, STEP_A0, STEP_B0) ||
display->platform.alderlake_p))
intel_de_rmw(display, CHICKEN_TRANS(display, cpu_transcoder),
0, ADLP_1_BASED_X_GRANULARITY);
if (intel_dp->psr.panel_replay_enabled) goto no_err;
/* * If a PSR error happened and the driver is reloaded, the EDP_PSR_IIR * will still keep the error set even after the reset done in the * irq_preinstall and irq_uninstall hooks. * And enabling in this situation cause the screen to freeze in the * first time that PSR HW tries to activate so lets keep PSR disabled * to avoid any rendering problems.
*/
val = intel_de_read(display, psr_iir_reg(display, cpu_transcoder));
val &= psr_irq_psr_error_bit_get(intel_dp); if (val) {
intel_dp->psr.sink_not_reliable = true;
drm_dbg_kms(display->drm, "PSR interruption error set, not enabling PSR\n"); returnfalse;
}
/* * Enabling sink PSR/Panel Replay here only for PSR. Panel Replay enable * bit is already written at this point. Sink ALPM is enabled here for * PSR and Panel Replay. See * intel_psr_panel_replay_enable_sink. Modifiers/options: * - Selective Update * - Region Early Transport * - Selective Update Region Scanline Capture * - VSC_SDP_CRC * - HPD on different Errors * - CRC verification * are written for PSR and Panel Replay here.
*/
intel_psr_enable_sink(intel_dp, crtc_state);
if (intel_dp_is_edp(intel_dp))
intel_snps_phy_update_psr_power_state(&dig_port->base, true);
/* * Link_ok is sticky and set here on PSR enable. We can assume link * training is complete as we never continue to PSR enable with * untrained link. Link_ok is kept as set until first short pulse * interrupt. This is targeted to workaround panels stating bad link * after PSR is enabled.
*/
intel_dp->psr.link_ok = true;
if (!intel_dp->psr.active) { if (transcoder_has_psr2(display, cpu_transcoder)) {
val = intel_de_read(display,
EDP_PSR2_CTL(display, cpu_transcoder));
drm_WARN_ON(display->drm, val & EDP_PSR2_ENABLE);
}
val = intel_de_read(display,
psr_ctl_reg(display, cpu_transcoder));
drm_WARN_ON(display->drm, val & EDP_PSR_ENABLE);
/* Wait till PSR is idle */ if (intel_de_wait_for_clear(display, psr_status,
psr_status_mask, 2000))
drm_err(display->drm, "Timed out waiting PSR idle state\n");
}
/** * intel_psr_disable - Disable PSR * @intel_dp: Intel DP * @old_crtc_state: old CRTC state * * This function needs to be called before disabling pipe.
*/ void intel_psr_disable(struct intel_dp *intel_dp, conststruct intel_crtc_state *old_crtc_state)
{ struct intel_display *display = to_intel_display(intel_dp);
if (!old_crtc_state->has_psr) return;
if (drm_WARN_ON(display->drm, !CAN_PSR(intel_dp) &&
!CAN_PANEL_REPLAY(intel_dp))) return;
/** * intel_psr_pause - Pause PSR * @intel_dp: Intel DP * * This function need to be called after enabling psr.
*/ void intel_psr_pause(struct intel_dp *intel_dp)
{ struct intel_psr *psr = &intel_dp->psr;
if (!CAN_PSR(intel_dp) && !CAN_PANEL_REPLAY(intel_dp)) return;
mutex_lock(&psr->lock);
if (!psr->enabled) {
mutex_unlock(&psr->lock); return;
}
if (intel_dp->psr.pause_counter++ == 0) {
intel_psr_exit(intel_dp);
intel_psr_wait_exit_locked(intel_dp);
}
/** * intel_psr_resume - Resume PSR * @intel_dp: Intel DP * * This function need to be called after pausing psr.
*/ void intel_psr_resume(struct intel_dp *intel_dp)
{ struct intel_display *display = to_intel_display(intel_dp); struct intel_psr *psr = &intel_dp->psr;
if (!CAN_PSR(intel_dp) && !CAN_PANEL_REPLAY(intel_dp)) return;
mutex_lock(&psr->lock);
if (!psr->enabled) goto out;
if (!psr->pause_counter) {
drm_warn(display->drm, "Unbalanced PSR pause/resume!\n"); goto out;
}
if (--intel_dp->psr.pause_counter == 0)
intel_psr_activate(intel_dp);
out:
mutex_unlock(&psr->lock);
}
/** * intel_psr_needs_vblank_notification - Check if PSR need vblank enable/disable * notification. * @crtc_state: CRTC status * * We need to block DC6 entry in case of Panel Replay as enabling VBI doesn't * prevent it in case of Panel Replay. Panel Replay switches main link off on * DC entry. This means vblank interrupts are not fired and is a problem if * user-space is polling for vblank events. Also Wa_16025596647 needs * information when vblank is enabled/disabled.
*/ bool intel_psr_needs_vblank_notification(conststruct 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;
/* Rest is for SRD_STATUS needed on LunarLake and onwards */ if (DISPLAY_VER(display) < 20) return 0;
/* * Comment on SRD_STATUS register in Bspec for LunarLake and onwards: * * To deterministically capture the transition of the state machine * going from SRDOFFACK to IDLE, the delayed V. Blank should be at least * one line after the non-delayed V. Blank. * * Legacy TG: TRANS_SET_CONTEXT_LATENCY > 0 * VRR TG: TRANS_VRR_CTL[ VRR Guardband ] < (TRANS_VRR_VMAX[ VRR Vmax ] * - TRANS_VTOTAL[ Vertical Active ]) * * SRD_STATUS is used only by PSR1 on PantherLake. * SRD_STATUS is used by PSR1 and Panel Replay DP on LunarLake.
*/
/* * Display WA #0884: skl+ * This documented WA for bxt can be safely applied * broadly so we can force HW tracking to exit PSR * instead of disabling and re-enabling. * Workaround tells us to write 0 to CUR_SURFLIVE_A, * but it makes more sense write to the current active * pipe. * * This workaround do not exist for platforms with display 10 or newer * but testing proved that it works for up display 13, for newer * than that testing will be needed.
*/
intel_de_write(display, CURSURFLIVE(display, intel_dp->psr.pipe), 0);
}
/* ADLP aligns the SU region to vdsc slice height in case dsc is enabled */ if (crtc_state->dsc.compression_enable &&
(display->platform.alderlake_p || DISPLAY_VER(display) >= 14))
y_alignment = vdsc_cfg->slice_height; else
y_alignment = crtc_state->su_y_granularity;
/* * When early transport is in use we need to extend SU area to cover * cursor fully when cursor is in SU area.
*/ staticvoid
intel_psr2_sel_fetch_et_alignment(struct intel_atomic_state *state, struct intel_crtc *crtc, bool *cursor_in_su_area)
{ struct intel_crtc_state *crtc_state = intel_atomic_get_new_crtc_state(state, crtc); struct intel_plane_state *new_plane_state; struct intel_plane *plane; int i;
if (!crtc_state->enable_psr2_su_region_et) return;
/* * TODO: Not clear how to handle planes with negative position, * also planes are not updated if they have a negative X * position so for now doing a full update in this cases * * Plane scaling and rotation is not supported by selective fetch and both * properties can change without a modeset, so need to be check at every * atomic commit.
*/ staticbool psr2_sel_fetch_plane_state_supported(conststruct intel_plane_state *plane_state)
{ if (plane_state->uapi.dst.y1 < 0 ||
plane_state->uapi.dst.x1 < 0 ||
plane_state->scaler_id >= 0 ||
plane_state->uapi.rotation != DRM_MODE_ROTATE_0) returnfalse;
returntrue;
}
/* * Check for pipe properties that is not supported by selective fetch. * * TODO: pipe scaling causes a modeset but skl_update_scaler_crtc() is executed * after intel_psr_compute_config(), so for now keeping PSR2 selective fetch * enabled and going to the full update path.
*/ staticbool psr2_sel_fetch_pipe_state_supported(conststruct intel_crtc_state *crtc_state)
{ if (crtc_state->scaler_state.scaler_id >= 0) returnfalse;
returntrue;
}
/* Wa 14019834836 */ staticvoid intel_psr_apply_pr_link_on_su_wa(struct intel_crtc_state *crtc_state)
{ struct intel_display *display = to_intel_display(crtc_state); struct intel_encoder *encoder; int hactive_limit;
if (crtc_state->psr2_su_area.y1 != 0 ||
crtc_state->psr2_su_area.y2 != 0) return;
/* * Calculate minimal selective fetch area of each plane and calculate * the pipe damaged area. * In the next loop the plane selective fetch area will actually be set * using whole pipe damaged area.
*/
for_each_oldnew_intel_plane_in_state(state, plane, old_plane_state,
new_plane_state, i) { struct drm_rect src, damaged_area = { .x1 = 0, .y1 = -1,
.x2 = INT_MAX };
if (new_plane_state->uapi.crtc != crtc_state->uapi.crtc) continue;
if (!new_plane_state->uapi.visible &&
!old_plane_state->uapi.visible) continue;
if (!psr2_sel_fetch_plane_state_supported(new_plane_state)) {
full_update = true; break;
}
/* * If visibility or plane moved, mark the whole plane area as * damaged as it needs to be complete redraw in the new and old * position.
*/ if (new_plane_state->uapi.visible != old_plane_state->uapi.visible ||
!drm_rect_equals(&new_plane_state->uapi.dst,
&old_plane_state->uapi.dst)) { if (old_plane_state->uapi.visible) {
damaged_area.y1 = old_plane_state->uapi.dst.y1;
damaged_area.y2 = old_plane_state->uapi.dst.y2;
clip_area_update(&crtc_state->psr2_su_area, &damaged_area,
&crtc_state->pipe_src);
}
if (new_plane_state->uapi.visible) {
damaged_area.y1 = new_plane_state->uapi.dst.y1;
damaged_area.y2 = new_plane_state->uapi.dst.y2;
clip_area_update(&crtc_state->psr2_su_area, &damaged_area,
&crtc_state->pipe_src);
} continue;
} elseif (new_plane_state->uapi.alpha != old_plane_state->uapi.alpha) { /* If alpha changed mark the whole plane area as damaged */
damaged_area.y1 = new_plane_state->uapi.dst.y1;
damaged_area.y2 = new_plane_state->uapi.dst.y2;
clip_area_update(&crtc_state->psr2_su_area, &damaged_area,
&crtc_state->pipe_src); continue;
}
/* * TODO: For now we are just using full update in case * selective fetch area calculation fails. To optimize this we * should identify cases where this happens and fix the area * calculation for those.
*/ if (crtc_state->psr2_su_area.y1 == -1) {
drm_info_once(display->drm, "Selective fetch area calculation failed in pipe %c\n",
pipe_name(crtc->pipe));
full_update = true;
}
if (full_update) goto skip_sel_fetch_set_loop;
intel_psr_apply_su_area_workarounds(crtc_state);
ret = drm_atomic_add_affected_planes(&state->base, &crtc->base); if (ret) return ret;
/* * Adjust su area to cover cursor fully as necessary (early * transport). This needs to be done after * drm_atomic_add_affected_planes to ensure visible cursor is added into * affected planes even when cursor is not updated by itself.
*/
intel_psr2_sel_fetch_et_alignment(state, crtc, &cursor_in_su_area);
intel_psr2_sel_fetch_pipe_alignment(crtc_state);
/* * Now that we have the pipe damaged area check if it intersect with * every plane, if it does set the plane selective fetch area.
*/
for_each_oldnew_intel_plane_in_state(state, plane, old_plane_state,
new_plane_state, i) { struct drm_rect *sel_fetch_area, inter; struct intel_plane *linked = new_plane_state->planar_linked_plane;
if (new_plane_state->uapi.crtc != crtc_state->uapi.crtc ||
!new_plane_state->uapi.visible) continue;
inter = crtc_state->psr2_su_area;
sel_fetch_area = &new_plane_state->psr2_sel_fetch_area; if (!drm_rect_intersect(&inter, &new_plane_state->uapi.dst)) {
sel_fetch_area->y1 = -1;
sel_fetch_area->y2 = -1; /* * if plane sel fetch was previously enabled -> * disable it
*/ if (drm_rect_height(&old_plane_state->psr2_sel_fetch_area) > 0)
crtc_state->update_planes |= BIT(plane->id);
continue;
}
if (!psr2_sel_fetch_plane_state_supported(new_plane_state)) {
full_update = true; break;
}
/* * Sel_fetch_area is calculated for UV plane. Use * same area for Y plane as well.
*/ if (linked) { struct intel_plane_state *linked_new_plane_state; struct drm_rect *linked_sel_fetch_area;
linked_new_plane_state = intel_atomic_get_plane_state(state, linked); if (IS_ERR(linked_new_plane_state)) return PTR_ERR(linked_new_plane_state);
/* SF partial frame enable has to be set even on full update */
val |= man_trk_ctl_partial_frame_bit_get(display);
val |= man_trk_ctl_continuos_full_frame(display);
/* Directly write the register */
intel_de_write_fw(display, PSR2_MAN_TRK_CTL(display, cpu_transcoder), val);
if (!crtc_state->enable_psr2_su_region_et) return;
if (psr->enabled) { /* * Reasons to disable: * - PSR disabled in new state * - All planes will go inactive * - Changing between PSR versions * - Region Early Transport changing * - Display WA #1136: skl, bxt
*/ if (intel_crtc_needs_modeset(new_crtc_state) ||
!new_crtc_state->has_psr ||
!new_crtc_state->active_planes ||
new_crtc_state->has_sel_update != psr->sel_update_enabled ||
new_crtc_state->enable_psr2_su_region_et != psr->su_region_et_enabled ||
new_crtc_state->has_panel_replay != psr->panel_replay_enabled ||
(DISPLAY_VER(display) < 11 && new_crtc_state->wm_level_disabled))
intel_psr_disable_locked(intel_dp); elseif (new_crtc_state->wm_level_disabled) /* Wa_14015648006 */
wm_optimization_wa(intel_dp, new_crtc_state);
}
/* * Any state lower than EDP_PSR2_STATUS_STATE_DEEP_SLEEP is enough. * As all higher states has bit 4 of PSR2 state set we can just wait for * EDP_PSR2_STATUS_STATE_DEEP_SLEEP to be cleared.
*/ return intel_de_wait_for_clear(display,
EDP_PSR2_STATUS(display, cpu_transcoder),
EDP_PSR2_STATUS_STATE_DEEP_SLEEP, 50);
}
/* * From bspec: Panel Self Refresh (BDW+) * Max. time for PSR to idle = Inverse of the refresh rate + 6 ms of * exit training time + 1.5 ms of aux channel handshake. 50 ms is * defensive enough to cover everything.
*/ return intel_de_wait_for_clear(display,
psr_status_reg(display, cpu_transcoder),
EDP_PSR_STATUS_STATE_MASK, 50);
}
/** * intel_psr_wait_for_idle_locked - wait for PSR be ready for a pipe update * @new_crtc_state: new CRTC state * * This function is expected to be called from pipe_update_start() where it is * not expected to race with PSR enable or disable.
*/ void intel_psr_wait_for_idle_locked(conststruct intel_crtc_state *new_crtc_state)
{ struct intel_display *display = to_intel_display(new_crtc_state); struct intel_encoder *encoder;
/* * Do it right away if it's already enabled, otherwise it will be done * when enabling the source.
*/ if (intel_dp->psr.enabled)
psr_irq_control(intel_dp);
mutex_unlock(&intel_dp->psr.lock);
if (old_mode != mode || old_disable_bits != disable_bits)
ret = intel_psr_fastset_force(display);
if (READ_ONCE(intel_dp->psr.irq_aux_error))
intel_psr_handle_irq(intel_dp);
/* * We have to make sure PSR is ready for re-enable * otherwise it keeps disabled until next full enable/disable cycle. * PSR might take some time to get fully disabled * and be ready for re-enable.
*/ if (!__psr_wait_for_idle_locked(intel_dp)) goto unlock;
/* * The delayed work can race with an invalidate hence we need to * recheck. Since psr_flush first clears this and then reschedules we * won't ever miss a flush when bailing out here.
*/ if (intel_dp->psr.busy_frontbuffer_bits || intel_dp->psr.active) goto unlock;
/** * intel_psr_invalidate - Invalidate PSR * @display: display device * @frontbuffer_bits: frontbuffer plane tracking bits * @origin: which operation caused the invalidate * * Since the hardware frontbuffer tracking has gaps we need to integrate * with the software frontbuffer tracking. This function gets called every * time frontbuffer rendering starts and a buffer gets dirtied. PSR must be * disabled if the frontbuffer mask contains a buffer relevant to PSR. * * Dirty frontbuffers relevant to PSR are tracked in busy_frontbuffer_bits."
*/ void intel_psr_invalidate(struct intel_display *display, unsigned frontbuffer_bits, enum fb_op_origin origin)
{ struct intel_encoder *encoder;
if (pipe_frontbuffer_bits)
_psr_invalidate_handle(intel_dp);
mutex_unlock(&intel_dp->psr.lock);
}
} /* * When we will be completely rely on PSR2 S/W tracking in future, * intel_psr_flush() will invalidate and flush the PSR for ORIGIN_FLIP * event also therefore tgl_dc3co_flush_locked() require to be changed * accordingly in future.
*/ staticvoid
tgl_dc3co_flush_locked(struct intel_dp *intel_dp, unsignedint frontbuffer_bits, enum fb_op_origin origin)
{ struct intel_display *display = to_intel_display(intel_dp);
if (!intel_dp->psr.dc3co_exitline || !intel_dp->psr.sel_update_enabled ||
!intel_dp->psr.active) return;
/* * At every frontbuffer flush flip event modified delay of delayed work, * when delayed work schedules that means display has been idle.
*/ if (!(frontbuffer_bits &
INTEL_FRONTBUFFER_ALL_MASK(intel_dp->psr.pipe))) return;
if (DISPLAY_VER(display) < 20 && intel_dp->psr.psr2_sel_fetch_enabled) { if (intel_dp->psr.psr2_sel_fetch_cff_enabled) { /* can we turn CFF off? */ if (intel_dp->psr.busy_frontbuffer_bits == 0)
intel_dp->psr.psr2_sel_fetch_cff_enabled = false;
}
/* * Still keep cff bit enabled as we don't have proper SU * configuration in case update is sent for any reason after * sff bit gets cleared by the HW on next vblank. * * NOTE: Setting cff bit is not needed for LunarLake onwards as * we have own register for SFF bit and we are not overwriting * existing SU configuration
*/
intel_psr_configure_full_frame_update(intel_dp);
/** * intel_psr_flush - Flush PSR * @display: display device * @frontbuffer_bits: frontbuffer plane tracking bits * @origin: which operation caused the flush * * Since the hardware frontbuffer tracking has gaps we need to integrate * with the software frontbuffer tracking. This function gets called every * time frontbuffer rendering has completed and flushed out to memory. PSR * can be enabled again if no other frontbuffer relevant to PSR is dirty. * * Dirty frontbuffers relevant to PSR are tracked in busy_frontbuffer_bits.
*/ void intel_psr_flush(struct intel_display *display, unsigned frontbuffer_bits, enum fb_op_origin origin)
{ struct intel_encoder *encoder;
/* * If the PSR is paused by an explicit intel_psr_paused() call, * we have to ensure that the PSR is not activated until * intel_psr_resume() is called.
*/ if (intel_dp->psr.pause_counter) goto unlock;
/** * intel_psr_init - Init basic PSR work and mutex. * @intel_dp: Intel DP * * This function is called after the initializing connector. * (the initializing of connector treats the handling of connector capabilities) * And it initializes basic PSR stuff for each DP Encoder.
*/ void intel_psr_init(struct intel_dp *intel_dp)
{ struct intel_display *display = to_intel_display(intel_dp); struct intel_connector *connector = intel_dp->attached_connector; struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
if (!(HAS_PSR(display) || HAS_DP20(display))) return;
/* * HSW spec explicitly says PSR is tied to port A. * BDW+ platforms have a instance of PSR registers per transcoder but * BDW, GEN9 and GEN11 are not validated by HW team in other transcoder * than eDP one. * For now it only supports one instance of PSR for BDW, GEN9 and GEN11. * So lets keep it hardcoded to PORT_A for BDW, GEN9 and GEN11. * But GEN12 supports a instance of PSR registers per transcoder.
*/ if (DISPLAY_VER(display) < 12 && dig_port->base.port != PORT_A) {
drm_dbg_kms(display->drm, "PSR condition failed: Port not supported\n"); return;
}
if (HAS_PSR(display) && intel_dp_is_edp(intel_dp))
intel_dp->psr.source_support = true;
/* Set link_standby x link_off defaults */ if (DISPLAY_VER(display) < 12) /* For new platforms up to TGL let's respect VBT back again */
intel_dp->psr.link_standby = connector->panel.vbt.psr.full_link;
r = drm_dp_dpcd_readb(&intel_dp->aux, DP_PSR_ESI, &val); if (r != 1) {
drm_err(display->drm, "Error reading DP_PSR_ESI\n"); return;
}
if (val & DP_PSR_CAPS_CHANGE) {
intel_psr_disable_locked(intel_dp);
psr->sink_not_reliable = true;
drm_dbg_kms(display->drm, "Sink PSR capability changed, disabling PSR\n");
/* Clearing it */
drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_ESI, val);
}
}
/* * On common bits: * DP_PSR_RFB_STORAGE_ERROR == DP_PANEL_REPLAY_RFB_STORAGE_ERROR * DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR == DP_PANEL_REPLAY_VSC_SDP_UNCORRECTABLE_ERROR * DP_PSR_LINK_CRC_ERROR == DP_PANEL_REPLAY_LINK_CRC_ERROR * this function is relying on PSR definitions
*/ void intel_psr_short_pulse(struct intel_dp *intel_dp)
{ struct intel_display *display = to_intel_display(intel_dp); struct intel_psr *psr = &intel_dp->psr;
u8 status, error_status; const u8 errors = DP_PSR_RFB_STORAGE_ERROR |
DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR |
DP_PSR_LINK_CRC_ERROR;
if (!CAN_PSR(intel_dp) && !CAN_PANEL_REPLAY(intel_dp)) return;
mutex_lock(&psr->lock);
psr->link_ok = false;
if (!psr->enabled) gotoexit;
if (psr_get_status_and_error_status(intel_dp, &status, &error_status)) {
drm_err(display->drm, "Error reading PSR status or error status\n"); gotoexit;
}
if ((!psr->panel_replay_enabled && status == DP_PSR_SINK_INTERNAL_ERROR) ||
(error_status & errors)) {
intel_psr_disable_locked(intel_dp);
psr->sink_not_reliable = true;
}
if (!psr->panel_replay_enabled && status == DP_PSR_SINK_INTERNAL_ERROR &&
!error_status)
drm_dbg_kms(display->drm, "PSR sink internal error, disabling PSR\n"); if (error_status & DP_PSR_RFB_STORAGE_ERROR)
drm_dbg_kms(display->drm, "PSR RFB storage error, disabling PSR\n"); if (error_status & DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR)
drm_dbg_kms(display->drm, "PSR VSC SDP uncorrectable error, disabling PSR\n"); if (error_status & DP_PSR_LINK_CRC_ERROR)
drm_dbg_kms(display->drm, "PSR Link CRC error, disabling PSR\n");
if (error_status & ~errors)
drm_err(display->drm, "PSR_ERROR_STATUS unhandled errors %x\n",
error_status & ~errors); /* clear status register */
drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_ERROR_STATUS, error_status);
if (!psr->panel_replay_enabled) {
psr_alpm_check(intel_dp);
psr_capability_changed_check(intel_dp);
}
mutex_lock(&intel_dp->psr.lock);
ret = intel_dp->psr.enabled;
mutex_unlock(&intel_dp->psr.lock);
return ret;
}
/** * intel_psr_link_ok - return psr->link_ok * @intel_dp: struct intel_dp * * We are seeing unexpected link re-trainings with some panels. This is caused * by panel stating bad link status after PSR is enabled. Code checking link * status can call this to ensure it can ignore bad link status stated by the * panel I.e. if panel is stating bad link and intel_psr_link_ok is stating link * is ok caller should rely on latter. * * Return value of link_ok
*/ bool intel_psr_link_ok(struct intel_dp *intel_dp)
{ bool ret;
if ((!CAN_PSR(intel_dp) && !CAN_PANEL_REPLAY(intel_dp)) ||
!intel_dp_is_edp(intel_dp)) returnfalse;
mutex_lock(&intel_dp->psr.lock);
ret = intel_dp->psr.link_ok;
mutex_unlock(&intel_dp->psr.lock);
return ret;
}
/** * intel_psr_lock - grab PSR lock * @crtc_state: the crtc state * * This is initially meant to be used by around CRTC update, when * vblank sensitive registers are updated and we need grab the lock * before it to avoid vblank evasion.
*/ void intel_psr_lock(conststruct intel_crtc_state *crtc_state)
{ struct intel_display *display = to_intel_display(crtc_state); struct intel_encoder *encoder;
/** * intel_psr_unlock - release PSR lock * @crtc_state: the crtc state * * Release the PSR lock that was held during pipe update.
*/ void intel_psr_unlock(conststruct intel_crtc_state *crtc_state)
{ struct intel_display *display = to_intel_display(crtc_state); struct intel_encoder *encoder;
if (intel_dp->psr.enabled && !intel_dp->psr.panel_replay_enabled)
intel_psr_apply_underrun_on_idle_wa_locked(intel_dp);
mutex_unlock(&intel_dp->psr.lock);
}
}
/** * intel_psr_notify_dc5_dc6 - Notify PSR about enable/disable dc5/dc6 * @display: intel atomic state * * This is targeted for underrun on idle PSR HW bug (Wa_16025596647) to schedule * psr_dc5_dc6_wa_work used for applying/removing the workaround.
*/ void intel_psr_notify_dc5_dc6(struct intel_display *display)
{ if (DISPLAY_VER(display) != 20 &&
!IS_DISPLAY_VERx100_STEP(display, 3000, STEP_A0, STEP_B0)) return;
schedule_work(&display->psr_dc5_dc6_wa_work);
}
/** * intel_psr_dc5_dc6_wa_init - Init work for underrun on idle PSR HW bug wa * @display: intel atomic state * * This is targeted for underrun on idle PSR HW bug (Wa_16025596647) to init * psr_dc5_dc6_wa_work used for applying the workaround.
*/ void intel_psr_dc5_dc6_wa_init(struct intel_display *display)
{ if (DISPLAY_VER(display) != 20 &&
!IS_DISPLAY_VERx100_STEP(display, 3000, STEP_A0, STEP_B0)) return;
/** * intel_psr_notify_pipe_change - Notify PSR about enable/disable of a pipe * @state: intel atomic state * @crtc: intel crtc * @enable: enable/disable * * This is targeted for underrun on idle PSR HW bug (Wa_16025596647) to apply * remove the workaround when pipe is getting enabled/disabled
*/ void intel_psr_notify_pipe_change(struct intel_atomic_state *state, struct intel_crtc *crtc, bool enable)
{ struct intel_display *display = to_intel_display(state); struct intel_encoder *encoder;
if (DISPLAY_VER(display) != 20 &&
!IS_DISPLAY_VERx100_STEP(display, 3000, STEP_A0, STEP_B0)) return;
/** * intel_psr_notify_vblank_enable_disable - Notify PSR about enable/disable of vblank * @display: intel display struct * @enable: enable/disable * * This is targeted for underrun on idle PSR HW bug (Wa_16025596647) to apply * remove the workaround when vblank is getting enabled/disabled
*/ void intel_psr_notify_vblank_enable_disable(struct intel_display *display, bool enable)
{ struct intel_encoder *encoder;
mutex_lock(&intel_dp->psr.lock); if (intel_dp->psr.panel_replay_enabled) {
mutex_unlock(&intel_dp->psr.lock); break;
}
if (intel_dp->psr.enabled)
intel_psr_apply_underrun_on_idle_wa_locked(intel_dp);
mutex_unlock(&intel_dp->psr.lock); return;
}
/* * 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, enable ? DC_STATE_DISABLE :
DC_STATE_EN_UPTO_DC6);
}
if (!psr->enabled) {
seq_printf(m, "PSR sink not reliable: %s\n",
str_yes_no(psr->sink_not_reliable));
goto unlock;
}
if (psr->panel_replay_enabled) {
val = intel_de_read(display, TRANS_DP2_CTL(cpu_transcoder));
if (intel_dp_is_edp(intel_dp))
psr2_ctl = intel_de_read(display,
EDP_PSR2_CTL(display,
cpu_transcoder));
enabled = val & TRANS_DP2_PANEL_REPLAY_ENABLE;
} elseif (psr->sel_update_enabled) {
val = intel_de_read(display,
EDP_PSR2_CTL(display, cpu_transcoder));
enabled = val & EDP_PSR2_ENABLE;
} else {
val = intel_de_read(display, psr_ctl_reg(display, cpu_transcoder));
enabled = val & EDP_PSR_ENABLE;
}
seq_printf(m, "Source PSR/PanelReplay ctl: %s [0x%08x]\n",
str_enabled_disabled(enabled), val); if (psr->panel_replay_enabled && intel_dp_is_edp(intel_dp))
seq_printf(m, "PSR2_CTL: 0x%08x\n",
psr2_ctl);
psr_source_status(intel_dp, m);
seq_printf(m, "Busy frontbuffer bits: 0x%08x\n",
psr->busy_frontbuffer_bits);
/* * SKL+ Perf counter is reset to 0 everytime DC state is entered
*/
val = intel_de_read(display, psr_perf_cnt_reg(display, cpu_transcoder));
seq_printf(m, "Performance counter: %u\n",
REG_FIELD_GET(EDP_PSR_PERF_CNT_MASK, val));
if (psr->sel_update_enabled) {
u32 su_frames_val[3]; int frame;
/* * PSR2_SU_STATUS register has been tied-off since DG2/ADL-P * (it returns zeros only) and it has been removed on Xe2_LPD.
*/ if (DISPLAY_VER(display) < 13) { /* * Reading all 3 registers before hand to minimize crossing a * frame boundary between register reads
*/ for (frame = 0; frame < PSR2_SU_STATUS_FRAMES; frame += 3) {
val = intel_de_read(display,
PSR2_SU_STATUS(display, cpu_transcoder, frame));
su_frames_val[frame / 3] = val;
}
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