This is a note to let you know that I've just added the patch titled
drm/i915/display: Don't disable DDI/Transcoder when setting phy test pattern
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-i915-display-don-t-disable-ddi-transcoder-when-s.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit ffdeffe6eb90fe4c07fd88cc0dac94074a09cebd
Author: Khaled Almahallawy <khaled.almahallawy@xxxxxxxxx>
Date: Wed Nov 23 14:09:26 2022 -0800
drm/i915/display: Don't disable DDI/Transcoder when setting phy test pattern
[ Upstream commit 3153eebb7a76e663ac76d6670dc113296de96622 ]
Bspecs has updated recently to remove the restriction to disable
DDI/Transcoder before setting PHY test pattern. This update is to
address PHY compliance test failures observed on a port with LTTPR.
The issue is that when Transc. is disabled, the main link signals fed
to LTTPR will be dropped invalidating link training, which will affect
the quality of the phy test pattern when the transcoder is enabled again.
v2: Update commit message (Clint)
v3: Add missing Signed-off in v2
v4: Update Bspec and commit message for pre-gen12 (Jani)
Bspec: 50482, 7555
Fixes: 8cdf72711928 ("drm/i915/dp: Program vswing, pre-emphasis, test-pattern")
Cc: Imre Deak <imre.deak@xxxxxxxxx>
Cc: Clint Taylor <clinton.a.taylor@xxxxxxxxx>
CC: Jani Nikula <jani.nikula@xxxxxxxxx>
Tested-by: Khaled Almahallawy <khaled.almahallawy@xxxxxxxxx>
Reviewed-by: Clint Taylor <clinton.a.taylor@xxxxxxxxx>
Signed-off-by: Khaled Almahallawy <khaled.almahallawy@xxxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20221123220926.170034-1-khaled.almahallawy@xxxxxxxxx
(cherry picked from commit be4a847652056b067d6dc6fe0fc024a9e2e987ca)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 1ccdf2da042b..64a15b636e8d 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -3245,61 +3245,6 @@ static void intel_dp_phy_pattern_update(struct intel_dp *intel_dp,
}
}
-static void
-intel_dp_autotest_phy_ddi_disable(struct intel_dp *intel_dp,
- const struct intel_crtc_state *crtc_state)
-{
- struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
- struct drm_device *dev = dig_port->base.base.dev;
- struct drm_i915_private *dev_priv = to_i915(dev);
- struct intel_crtc *crtc = to_intel_crtc(dig_port->base.base.crtc);
- enum pipe pipe = crtc->pipe;
- u32 trans_ddi_func_ctl_value, trans_conf_value, dp_tp_ctl_value;
-
- trans_ddi_func_ctl_value = intel_de_read(dev_priv,
- TRANS_DDI_FUNC_CTL(pipe));
- trans_conf_value = intel_de_read(dev_priv, PIPECONF(pipe));
- dp_tp_ctl_value = intel_de_read(dev_priv, TGL_DP_TP_CTL(pipe));
-
- trans_ddi_func_ctl_value &= ~(TRANS_DDI_FUNC_ENABLE |
- TGL_TRANS_DDI_PORT_MASK);
- trans_conf_value &= ~PIPECONF_ENABLE;
- dp_tp_ctl_value &= ~DP_TP_CTL_ENABLE;
-
- intel_de_write(dev_priv, PIPECONF(pipe), trans_conf_value);
- intel_de_write(dev_priv, TRANS_DDI_FUNC_CTL(pipe),
- trans_ddi_func_ctl_value);
- intel_de_write(dev_priv, TGL_DP_TP_CTL(pipe), dp_tp_ctl_value);
-}
-
-static void
-intel_dp_autotest_phy_ddi_enable(struct intel_dp *intel_dp,
- const struct intel_crtc_state *crtc_state)
-{
- struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
- struct drm_device *dev = dig_port->base.base.dev;
- struct drm_i915_private *dev_priv = to_i915(dev);
- enum port port = dig_port->base.port;
- struct intel_crtc *crtc = to_intel_crtc(dig_port->base.base.crtc);
- enum pipe pipe = crtc->pipe;
- u32 trans_ddi_func_ctl_value, trans_conf_value, dp_tp_ctl_value;
-
- trans_ddi_func_ctl_value = intel_de_read(dev_priv,
- TRANS_DDI_FUNC_CTL(pipe));
- trans_conf_value = intel_de_read(dev_priv, PIPECONF(pipe));
- dp_tp_ctl_value = intel_de_read(dev_priv, TGL_DP_TP_CTL(pipe));
-
- trans_ddi_func_ctl_value |= TRANS_DDI_FUNC_ENABLE |
- TGL_TRANS_DDI_SELECT_PORT(port);
- trans_conf_value |= PIPECONF_ENABLE;
- dp_tp_ctl_value |= DP_TP_CTL_ENABLE;
-
- intel_de_write(dev_priv, PIPECONF(pipe), trans_conf_value);
- intel_de_write(dev_priv, TGL_DP_TP_CTL(pipe), dp_tp_ctl_value);
- intel_de_write(dev_priv, TRANS_DDI_FUNC_CTL(pipe),
- trans_ddi_func_ctl_value);
-}
-
static void intel_dp_process_phy_request(struct intel_dp *intel_dp,
const struct intel_crtc_state *crtc_state)
{
@@ -3317,14 +3262,10 @@ static void intel_dp_process_phy_request(struct intel_dp *intel_dp,
intel_dp_get_adjust_train(intel_dp, crtc_state, DP_PHY_DPRX,
link_status);
- intel_dp_autotest_phy_ddi_disable(intel_dp, crtc_state);
-
intel_dp_set_signal_levels(intel_dp, crtc_state, DP_PHY_DPRX);
intel_dp_phy_pattern_update(intel_dp, crtc_state);
- intel_dp_autotest_phy_ddi_enable(intel_dp, crtc_state);
-
drm_dp_dpcd_write(&intel_dp->aux, DP_TRAINING_LANE0_SET,
intel_dp->train_set, crtc_state->lane_count);
