[Intel-gfx] [RFC 6/7] drm/i915/dp: Update the pattern as per request

[Manasi Navare]

Hi Animesh,

I dont see the patch revision with these fixes, have you sent it to the M-L?

Manasi

On Tue, Nov 19, 2019 at 12:17:03AM +0530, Animesh Manna wrote:
> 
> 
> On 11/18/2019 12:11 PM, Manasi Navare wrote:
> >On Fri, Nov 15, 2019 at 08:55:48PM +0530, Animesh Manna wrote:
> >>set pattern in DP_COMP_CTL.
> >It would be nice to have some brief description here on
> >context of setting a PHY pattern for PHY compliance and that
> >this will be called during pre enable in atomic commit in case
> >of phy compliance request etc..and that the requested phy pattern
> >is read during test handling etc..
> >something that gives a reader a better idea of the context of
> >this function
> >
> >>Signed-off-by: Animesh Manna <animesh.manna at intel.com>
> >>---
> >>  drivers/gpu/drm/i915/display/intel_dp.c | 55 +++++++++++++++++++++++++
> >>  1 file changed, 55 insertions(+)
> >>
> >>diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> >>index a2b860cf3b93..df31278a1619 100644
> >>--- a/drivers/gpu/drm/i915/display/intel_dp.c
> >>+++ b/drivers/gpu/drm/i915/display/intel_dp.c
> >>@@ -4955,6 +4955,61 @@ static u8 intel_dp_prepare_phytest(struct intel_dp *intel_dp)
> >>  	return DP_TEST_ACK;
> >>  }
> >>+static inline void intel_dp_phy_pattern_update(struct intel_dp *intel_dp)
> >>+{
> >>+	struct drm_i915_private *dev_priv =
> >>+			to_i915(dp_to_dig_port(intel_dp)->base.base.dev);
> >>+	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
> >>+	struct drm_dp_phy_test_params *data =
> >>+			&intel_dp->compliance.test_data.phytest;
> >>+	u32 temp;
> >>+
> >>+	switch (data->phy_pattern) {
> >>+	case DP_PHY_TEST_PATTERN_NONE:
> >>+		DRM_DEBUG_KMS("Disable Phy Test Pattern\n");
> >>+		I915_WRITE(DDI_DP_COMP_CTL(intel_dig_port->base.port), 0x0);
> >>+		break;
> >>+	case DP_PHY_TEST_PATTERN_D10_2:
> >>+		DRM_DEBUG_KMS("Set D10.2 Phy Test Pattern\n");
> >>+		I915_WRITE(DDI_DP_COMP_CTL(intel_dig_port->base.port),
> >>+			   DDI_DP_COMP_CTL_ENABLE | DDI_DP_COMP_CTL_D10_2);
> >>+		break;
> >>+	case DP_PHY_TEST_PATTERN_ERROR_COUNT:
> >>+		DRM_DEBUG_KMS("Set Error Count Phy Test Pattern\n");
> >>+		I915_WRITE(DDI_DP_COMP_CTL(intel_dig_port->base.port),
> >>+			   DDI_DP_COMP_CTL_ENABLE |
> >>+			   DDI_DP_COMP_CTL_SCRAMBLED_0);
> >>+		break;
> >>+	case DP_PHY_TEST_PATTERN_PRBS7:
> >>+		DRM_DEBUG_KMS("Set PRBS7 Phy Test Pattern\n");
> >>+		I915_WRITE(DDI_DP_COMP_CTL(intel_dig_port->base.port),
> >>+			   DDI_DP_COMP_CTL_ENABLE | DDI_DP_COMP_CTL_PRBS7);
> >>+		break;
> >>+	case DP_PHY_TEST_PATTERN_80BIT_CUSTOM:
> >>+		DRM_DEBUG_KMS("Set 80Bit Custom Phy Test Pattern\n");
> >>+		temp = ((data->custom80[0] << 24) | (data->custom80[1] << 16) |
> >>+			(data->custom80[2] << 8) | (data->custom80[3]));
> >>+		I915_WRITE(DDI_DP_COMP_PAT(intel_dig_port->base.port, 0), temp);
> >>+		temp = ((data->custom80[4] << 24) | (data->custom80[5] << 16) |
> >>+			(data->custom80[6] << 8) | (data->custom80[7]));
> >>+		I915_WRITE(DDI_DP_COMP_PAT(intel_dig_port->base.port, 1), temp);
> >>+		temp = ((data->custom80[8] << 8) | data->custom80[9]);
> >>+		I915_WRITE(DDI_DP_COMP_PAT(intel_dig_port->base.port, 2), temp);
> >>+		I915_WRITE(DDI_DP_COMP_CTL(intel_dig_port->base.port),
> >>+			   DDI_DP_COMP_CTL_ENABLE | DDI_DP_COMP_CTL_CUSTOM80);
> >>+		break;
> >>+	case DP_PHY_TEST_PATTERN_CP2520:
> >>+		DRM_DEBUG_KMS("Set HBR2 compliance Phy Test Pattern\n");
> >>+		temp = ((data->hbr2_reset[1] << 8) | data->hbr2_reset[0]);
> >>+		I915_WRITE(DDI_DP_COMP_CTL(intel_dig_port->base.port),
> >>+			   DDI_DP_COMP_CTL_ENABLE | DDI_DP_COMP_CTL_HBR2 |
> >>+			   temp);
> >>+		break;
> >>+	default:
> >>+		DRM_ERROR("Invalid Phy Test PAttern\n");
> >Here we would definitely want a WARN since ERROR at this point in commit is not good
> >Other than looks good to me.
> 
> Thanks, will add the suggested changes.
> 
> Regards,
> Animesh
> >
> >Manasi
> >
> >>+	}
> >>+}
> >>+
> >>  static u8 intel_dp_autotest_phy_pattern(struct intel_dp *intel_dp)
> >>  {
> >>  	u8 test_result = DP_TEST_NAK;
> >>-- 
> >>2.22.0
> >>
>