[PATCH 5.14 084/151] drm/i915/tc: Fix TypeC port init/resume time sanitization

Greg Kroah-Hartman
2021-10-11T14:07:47Z

From: Imre Deak <imre.deak@intel.com>

[ Upstream commit a532cde31de3cae6ed60e60d6f9379771f652809 ]

Atm during driver loading and system resume TypeC ports are accessed
before their HW/SW state is synced. Move the TypeC port sanitization to
the encoder's sync_state hook to fix this.

v2: Handle the encoder disabled case in gen11_dsi_sync_state() as well
(Jose, Jani)

Fixes: f9e76a6e68d3 ("drm/i915: Add an encoder hook to sanitize its state during init/resume")
Cc: José Roberto de Souza <jose.souza@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210929132833.2253961-1-imre.deak@intel.com
(cherry picked from commit 7194dc998dfffca096c30b3cd39625158608992d)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/i915/display/icl_dsi.c | 10 ++++++++--
drivers/gpu/drm/i915/display/intel_ddi.c | 8 +++++++-
drivers/gpu/drm/i915/display/intel_display.c | 20 +++++---------------
3 files changed, 20 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c
index 970ba9e7f84e..13bafa9d49c0 100644
--- a/drivers/gpu/drm/i915/display/icl_dsi.c
+++ b/drivers/gpu/drm/i915/display/icl_dsi.c
@@ -1577,8 +1577,14 @@ static void gen11_dsi_sync_state(struct intel_encoder *encoder,
const struct intel_crtc_state *crtc_state)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
- struct intel_crtc *intel_crtc = to_intel_crtc(crtc_state->uapi.crtc);
- enum pipe pipe = intel_crtc->pipe;
+ struct intel_crtc *intel_crtc;
+ enum pipe pipe;
+
+ if (!crtc_state)
+ return;
+
+ intel_crtc = to_intel_crtc(crtc_state->uapi.crtc);
+ pipe = intel_crtc->pipe;

/* wa verify 1409054076:icl,jsl,ehl */
if (DISPLAY_VER(dev_priv) == 11 && pipe == PIPE_B &&
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 00dade49665b..89a109f65f38 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -3899,7 +3899,13 @@ void hsw_ddi_get_config(struct intel_encoder *encoder,
static void intel_ddi_sync_state(struct intel_encoder *encoder,
const struct intel_crtc_state *crtc_state)
{
- if (intel_crtc_has_dp_encoder(crtc_state))
+ struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+ enum phy phy = intel_port_to_phy(i915, encoder->port);
+
+ if (intel_phy_is_tc(i915, phy))
+ intel_tc_port_sanitize(enc_to_dig_port(encoder));
+
+ if (crtc_state && intel_crtc_has_dp_encoder(crtc_state))
intel_dp_sync_state(encoder, crtc_state);
}

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 0a8a2395c8ac..bb1d2b19be15 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -12933,18 +12933,16 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev)
readout_plane_state(dev_priv);

for_each_intel_encoder(dev, encoder) {
+ struct intel_crtc_state *crtc_state = NULL;
+
pipe = 0;

if (encoder->get_hw_state(encoder, &pipe)) {
- struct intel_crtc_state *crtc_state;
-
crtc = intel_get_crtc_for_pipe(dev_priv, pipe);
crtc_state = to_intel_crtc_state(crtc->base.state);

encoder->base.crtc = &crtc->base;
intel_encoder_get_config(encoder, crtc_state);
- if (encoder->sync_state)
- encoder->sync_state(encoder, crtc_state);

/* read out to slave crtc as well for bigjoiner */
if (crtc_state->bigjoiner) {
@@ -12959,6 +12957,9 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev)
encoder->base.crtc = NULL;
}

+ if (encoder->sync_state)
+ encoder->sync_state(encoder, crtc_state);
+
drm_dbg_kms(&dev_priv->drm,
"[ENCODER:%d:%s] hw state readout: %s, pipe %c\n",
encoder->base.base.id, encoder->base.name,
@@ -13241,17 +13242,6 @@ intel_modeset_setup_hw_state(struct drm_device *dev,
intel_modeset_readout_hw_state(dev);

/* HW state is read out, now we need to sanitize this mess. */
-
- /* Sanitize the TypeC port mode upfront, encoders depend on this */
- for_each_intel_encoder(dev, encoder) {
- enum phy phy = intel_port_to_phy(dev_priv, encoder->port);
-
- /* We need to sanitize only the MST primary port. */
- if (encoder->type != INTEL_OUTPUT_DP_MST &&
- intel_phy_is_tc(dev_priv, phy))
- intel_tc_port_sanitize(enc_to_dig_port(encoder));
- }
-
get_encoder_power_domains(dev_priv);

if (HAS_PCH_IBX(dev_priv))
--
2.33.0