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author | José Roberto de Souza <jose.souza@intel.com> | 2022-02-10 10:52:23 -0800 |
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committer | José Roberto de Souza <jose.souza@intel.com> | 2022-02-18 07:04:08 -0800 |
commit | 79af2404e537e0f74798faa0a26bbd374ece27f8 (patch) | |
tree | aa1888fe58cb14bb8f1655d4f722281329569155 /drivers/gpu/drm/i915/display/intel_psr.c | |
parent | ab597bb3760ce2e7a5c48755cacf7df8abfcda6b (diff) | |
download | linux-79af2404e537e0f74798faa0a26bbd374ece27f8.tar.gz linux-79af2404e537e0f74798faa0a26bbd374ece27f8.tar.bz2 linux-79af2404e537e0f74798faa0a26bbd374ece27f8.zip |
drm/i915/display: Implement Wa_16013835468
PSR2 workaround required when mode has delayed vblank.
BSpec: 52890
BSpec: 49421
Cc: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Jouni Högander <jouni.hogander@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220210185223.95399-2-jose.souza@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_psr.c')
-rw-r--r-- | drivers/gpu/drm/i915/display/intel_psr.c | 40 |
1 files changed, 38 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c index 72bd8d3261e0..2e0b092f4b6b 100644 --- a/drivers/gpu/drm/i915/display/intel_psr.c +++ b/drivers/gpu/drm/i915/display/intel_psr.c @@ -1063,7 +1063,23 @@ static void intel_psr_activate(struct intel_dp *intel_dp) intel_dp->psr.active = true; } -static void intel_psr_enable_source(struct intel_dp *intel_dp) +static u32 wa_16013835468_bit_get(struct intel_dp *intel_dp) +{ + switch (intel_dp->psr.pipe) { + case PIPE_A: + return LATENCY_REPORTING_REMOVED_PIPE_A; + case PIPE_B: + return LATENCY_REPORTING_REMOVED_PIPE_B; + case PIPE_C: + return LATENCY_REPORTING_REMOVED_PIPE_C; + default: + MISSING_CASE(intel_dp->psr.pipe); + return 0; + } +} + +static void intel_psr_enable_source(struct intel_dp *intel_dp, + const struct intel_crtc_state *crtc_state) { struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); enum transcoder cpu_transcoder = intel_dp->psr.transcoder; @@ -1133,6 +1149,20 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp) if (IS_ALDERLAKE_P(dev_priv)) intel_de_rmw(dev_priv, CLKGATE_DIS_MISC, 0, CLKGATE_DIS_MISC_DMASC_GATING_DIS); + + /* Wa_16013835468:tgl[b0+], dg1 */ + if (IS_TGL_DISPLAY_STEP(dev_priv, STEP_B0, STEP_FOREVER) || + IS_DG1(dev_priv)) { + u16 vtotal, vblank; + + vtotal = crtc_state->uapi.adjusted_mode.crtc_vtotal - + crtc_state->uapi.adjusted_mode.crtc_vdisplay; + vblank = crtc_state->uapi.adjusted_mode.crtc_vblank_end - + crtc_state->uapi.adjusted_mode.crtc_vblank_start; + if (vblank > vtotal) + intel_de_rmw(dev_priv, GEN8_CHICKEN_DCPR_1, 0, + wa_16013835468_bit_get(intel_dp)); + } } } @@ -1198,7 +1228,7 @@ static void intel_psr_enable_locked(struct intel_dp *intel_dp, intel_write_dp_vsc_sdp(encoder, crtc_state, &crtc_state->psr_vsc); intel_snps_phy_update_psr_power_state(dev_priv, phy, true); intel_psr_enable_sink(intel_dp); - intel_psr_enable_source(intel_dp); + intel_psr_enable_source(intel_dp, crtc_state); intel_dp->psr.enabled = true; intel_dp->psr.paused = false; @@ -1297,6 +1327,12 @@ static void intel_psr_disable_locked(struct intel_dp *intel_dp) if (IS_ALDERLAKE_P(dev_priv)) intel_de_rmw(dev_priv, CLKGATE_DIS_MISC, CLKGATE_DIS_MISC_DMASC_GATING_DIS, 0); + + /* Wa_16013835468:tgl[b0+], dg1 */ + if (IS_TGL_DISPLAY_STEP(dev_priv, STEP_B0, STEP_FOREVER) || + IS_DG1(dev_priv)) + intel_de_rmw(dev_priv, GEN8_CHICKEN_DCPR_1, + wa_16013835468_bit_get(intel_dp), 0); } intel_snps_phy_update_psr_power_state(dev_priv, phy, false); |