[Intel-gfx] [PATCH v5 7/7] drm/i915/dp: Program vswing, pre-emphasis, test-pattern
Manasi Navare
manasi.d.navare at intel.com
Mon Apr 6 15:09:38 UTC 2020
On Mon, Mar 16, 2020 at 04:07:59PM +0530, Animesh Manna wrote:
> This patch process phy compliance request by programming requested
> vswing, pre-emphasis and test pattern.
>
> v1: Initial patch.
> v2: Fixes added during testing with test-scope. (Khaled/Clint/Manasi)
> - pipe used as argument during registers programming instead of port.
> - TRANS_CONF must be disable/enable as well during ddi disable/enable.
> - harcoded PLTPAT 80 bit custom pattern as the DPR-100 does not set it
> in the sink’s DPCDs
> - TRANS_DDI_FUNC_CTL DDI_Select (Bits 27:30) need to reset/set during
> disable/enable.
> v3: used macros instead of numbers and some cosmetic changes. [Manasi]
>
> Cc: Clinton Taylor <Clinton.A.Taylor at intel.com>
> Cc: Manasi Navare <manasi.d.navare at intel.com>
> Signed-off-by: Animesh Manna <animesh.manna at intel.com>
> Signed-off-by: Khaled Almahallawy <khaled.almahallawy at intel.com>
Looks good to me,
Reviewed-by: Manasi Navare <manasi.d.navare at intel.com>
Manasi
> ---
> drivers/gpu/drm/i915/display/intel_dp.c | 147 ++++++++++++++++++++++++
> drivers/gpu/drm/i915/display/intel_dp.h | 1 +
> 2 files changed, 148 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> index 16a4a48c8168..8846471a49b8 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -5020,6 +5020,151 @@ static u8 intel_dp_prepare_phytest(struct intel_dp *intel_dp)
> return DP_TEST_ACK;
> }
>
> +static 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;
> + struct intel_crtc *crtc = to_intel_crtc(intel_dig_port->base.base.crtc);
> + enum pipe pipe = crtc->pipe;
> + u32 pattern_val;
> +
> + switch (data->phy_pattern) {
> + case DP_PHY_TEST_PATTERN_NONE:
> + DRM_DEBUG_KMS("Disable Phy Test Pattern\n");
> + intel_de_write(dev_priv, DDI_DP_COMP_CTL(pipe), 0x0);
> + break;
> + case DP_PHY_TEST_PATTERN_D10_2:
> + DRM_DEBUG_KMS("Set D10.2 Phy Test Pattern\n");
> + intel_de_write(dev_priv, DDI_DP_COMP_CTL(pipe),
> + 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");
> + intel_de_write(dev_priv, DDI_DP_COMP_CTL(pipe),
> + 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");
> + intel_de_write(dev_priv, DDI_DP_COMP_CTL(pipe),
> + DDI_DP_COMP_CTL_ENABLE | DDI_DP_COMP_CTL_PRBS7);
> + break;
> + case DP_PHY_TEST_PATTERN_80BIT_CUSTOM:
> + /*
> + * FIXME: Ideally pattern should come from DPCD 0x250. As
> + * current firmware of DPR-100 could not set it, so hardcoding
> + * now for complaince test.
> + */
> + DRM_DEBUG_KMS("Set 80Bit Custom Phy Test Pattern 0x3e0f83e0 0x0f83e0f8 0x0000f83e\n");
> + pattern_val = 0x3e0f83e0;
> + intel_de_write(dev_priv, DDI_DP_COMP_PAT(pipe, 0), pattern_val);
> + pattern_val = 0x0f83e0f8;
> + intel_de_write(dev_priv, DDI_DP_COMP_PAT(pipe, 1), pattern_val);
> + pattern_val = 0x0000f83e;
> + intel_de_write(dev_priv, DDI_DP_COMP_PAT(pipe, 2), pattern_val);
> + intel_de_write(dev_priv, DDI_DP_COMP_CTL(pipe),
> + DDI_DP_COMP_CTL_ENABLE |
> + DDI_DP_COMP_CTL_CUSTOM80);
> + break;
> + case DP_PHY_TEST_PATTERN_CP2520:
> + /*
> + * FIXME: Ideally pattern should come from DPCD 0x24A. As
> + * current firmware of DPR-100 could not set it, so hardcoding
> + * now for complaince test.
> + */
> + DRM_DEBUG_KMS("Set HBR2 compliance Phy Test Pattern\n");
> + pattern_val = 0xFB;
> + intel_de_write(dev_priv, DDI_DP_COMP_CTL(pipe),
> + DDI_DP_COMP_CTL_ENABLE | DDI_DP_COMP_CTL_HBR2 |
> + pattern_val);
> + break;
> + default:
> + WARN(1, "Invalid Phy Test Pattern\n");
> + }
> +}
> +
> +static void
> +intel_dp_autotest_phy_ddi_disable(struct intel_dp *intel_dp)
> +{
> + struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
> + struct drm_device *dev = intel_dig_port->base.base.dev;
> + struct drm_i915_private *dev_priv = to_i915(dev);
> + struct intel_crtc *crtc = to_intel_crtc(intel_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, uint8_t lane_cnt)
> +{
> + struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
> + struct drm_device *dev = intel_dig_port->base.base.dev;
> + struct drm_i915_private *dev_priv = to_i915(dev);
> + enum port port = intel_dig_port->base.port;
> + struct intel_crtc *crtc = to_intel_crtc(intel_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);
> +}
> +
> +void intel_dp_process_phy_request(struct intel_dp *intel_dp)
> +{
> + struct drm_dp_phy_test_params *data =
> + &intel_dp->compliance.test_data.phytest;
> + u8 link_status[DP_LINK_STATUS_SIZE];
> +
> + if (!intel_dp_get_link_status(intel_dp, link_status)) {
> + DRM_DEBUG_KMS("failed to get link status\n");
> + return;
> + }
> +
> + /* retrieve vswing & pre-emphasis setting */
> + intel_dp_get_adjust_train(intel_dp, link_status);
> +
> + intel_dp_autotest_phy_ddi_disable(intel_dp);
> +
> + intel_dp_set_signal_levels(intel_dp);
> +
> + intel_dp_phy_pattern_update(intel_dp);
> +
> + intel_dp_autotest_phy_ddi_enable(intel_dp, data->num_lanes);
> +
> + drm_dp_set_phy_test_pattern(&intel_dp->aux, data,
> + link_status[DP_DPCD_REV]);
> +}
> +
> static u8 intel_dp_autotest_phy_pattern(struct intel_dp *intel_dp)
> {
> u8 test_result = DP_TEST_NAK;
> @@ -5028,6 +5173,8 @@ static u8 intel_dp_autotest_phy_pattern(struct intel_dp *intel_dp)
> if (test_result != DP_TEST_ACK)
> DRM_ERROR("Phy test preparation failed\n");
>
> + intel_dp_process_phy_request(intel_dp);
> +
> return test_result;
> }
>
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h
> index 0c7be8ed1423..0d22a230b32d 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.h
> +++ b/drivers/gpu/drm/i915/display/intel_dp.h
> @@ -115,6 +115,7 @@ void intel_dp_hdr_metadata_enable(struct intel_dp *intel_dp,
> const struct intel_crtc_state *crtc_state,
> const struct drm_connector_state *conn_state);
> bool intel_digital_port_connected(struct intel_encoder *encoder);
> +void intel_dp_process_phy_request(struct intel_dp *intel_dp);
>
> static inline unsigned int intel_dp_unused_lane_mask(int lane_count)
> {
> --
> 2.24.0
>
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