[Intel-gfx] [PATCH] drm/i915: make edp optimize config
kbuild test robot
lkp at intel.com
Mon Mar 19 00:06:43 UTC 2018
Hi Matt,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on v4.16-rc4]
[also build test ERROR on next-20180316]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/matthew-s-atwood-intel-com/drm-i915-make-edp-optimize-config/20180319-065307
config: i386-randconfig-a1-201811 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
All errors (new ones prefixed by >>):
drivers/gpu/drm/i915/intel_dp.c: In function 'intel_dp_compute_config':
>> drivers/gpu/drm/i915/intel_dp.c:1729:6: error: 'dpcd' undeclared (first use in this function)
if(dpcd[DP_DPCD_REV] < DPCD_REV_14){
^
drivers/gpu/drm/i915/intel_dp.c:1729:6: note: each undeclared identifier is reported only once for each function it appears in
>> drivers/gpu/drm/i915/intel_dp.c:1729:26: error: 'DPCD_REV_14' undeclared (first use in this function)
if(dpcd[DP_DPCD_REV] < DPCD_REV_14){
^
vim +/dpcd +1729 drivers/gpu/drm/i915/intel_dp.c
1607
1608 bool
1609 intel_dp_compute_config(struct intel_encoder *encoder,
1610 struct intel_crtc_state *pipe_config,
1611 struct drm_connector_state *conn_state)
1612 {
1613 struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
1614 struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
1615 struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
1616 enum port port = encoder->port;
1617 struct intel_crtc *intel_crtc = to_intel_crtc(pipe_config->base.crtc);
1618 struct intel_connector *intel_connector = intel_dp->attached_connector;
1619 struct intel_digital_connector_state *intel_conn_state =
1620 to_intel_digital_connector_state(conn_state);
1621 int lane_count, clock;
1622 int min_lane_count = 1;
1623 int max_lane_count = intel_dp_max_lane_count(intel_dp);
1624 /* Conveniently, the link BW constants become indices with a shift...*/
1625 int min_clock = 0;
1626 int max_clock;
1627 int bpp, mode_rate;
1628 int link_avail, link_clock;
1629 int common_len;
1630 uint8_t link_bw, rate_select;
1631 bool reduce_m_n = drm_dp_has_quirk(&intel_dp->desc,
1632 DP_DPCD_QUIRK_LIMITED_M_N);
1633
1634 common_len = intel_dp_common_len_rate_limit(intel_dp,
1635 intel_dp->max_link_rate);
1636
1637 /* No common link rates between source and sink */
1638 WARN_ON(common_len <= 0);
1639
1640 max_clock = common_len - 1;
1641
1642 if (HAS_PCH_SPLIT(dev_priv) && !HAS_DDI(dev_priv) && port != PORT_A)
1643 pipe_config->has_pch_encoder = true;
1644
1645 pipe_config->has_drrs = false;
1646 if (IS_G4X(dev_priv) || port == PORT_A)
1647 pipe_config->has_audio = false;
1648 else if (intel_conn_state->force_audio == HDMI_AUDIO_AUTO)
1649 pipe_config->has_audio = intel_dp->has_audio;
1650 else
1651 pipe_config->has_audio = intel_conn_state->force_audio == HDMI_AUDIO_ON;
1652
1653 if (intel_dp_is_edp(intel_dp) && intel_connector->panel.fixed_mode) {
1654 struct drm_display_mode *panel_mode =
1655 intel_connector->panel.alt_fixed_mode;
1656 struct drm_display_mode *req_mode = &pipe_config->base.mode;
1657
1658 if (!intel_edp_compare_alt_mode(req_mode, panel_mode))
1659 panel_mode = intel_connector->panel.fixed_mode;
1660
1661 drm_mode_debug_printmodeline(panel_mode);
1662
1663 intel_fixed_panel_mode(panel_mode, adjusted_mode);
1664
1665 if (INTEL_GEN(dev_priv) >= 9) {
1666 int ret;
1667 ret = skl_update_scaler_crtc(pipe_config);
1668 if (ret)
1669 return ret;
1670 }
1671
1672 if (HAS_GMCH_DISPLAY(dev_priv))
1673 intel_gmch_panel_fitting(intel_crtc, pipe_config,
1674 conn_state->scaling_mode);
1675 else
1676 intel_pch_panel_fitting(intel_crtc, pipe_config,
1677 conn_state->scaling_mode);
1678 }
1679
1680 if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
1681 adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
1682 return false;
1683
1684 if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK)
1685 return false;
1686
1687 /* Use values requested by Compliance Test Request */
1688 if (intel_dp->compliance.test_type == DP_TEST_LINK_TRAINING) {
1689 int index;
1690
1691 /* Validate the compliance test data since max values
1692 * might have changed due to link train fallback.
1693 */
1694 if (intel_dp_link_params_valid(intel_dp, intel_dp->compliance.test_link_rate,
1695 intel_dp->compliance.test_lane_count)) {
1696 index = intel_dp_rate_index(intel_dp->common_rates,
1697 intel_dp->num_common_rates,
1698 intel_dp->compliance.test_link_rate);
1699 if (index >= 0)
1700 min_clock = max_clock = index;
1701 min_lane_count = max_lane_count = intel_dp->compliance.test_lane_count;
1702 }
1703 }
1704 DRM_DEBUG_KMS("DP link computation with max lane count %i "
1705 "max bw %d pixel clock %iKHz\n",
1706 max_lane_count, intel_dp->common_rates[max_clock],
1707 adjusted_mode->crtc_clock);
1708
1709 /* Walk through all bpp values. Luckily they're all nicely spaced with 2
1710 * bpc in between. */
1711 bpp = intel_dp_compute_bpp(intel_dp, pipe_config);
1712 if (intel_dp_is_edp(intel_dp)) {
1713
1714 /* Get bpp from vbt only for panels that dont have bpp in edid */
1715 if (intel_connector->base.display_info.bpc == 0 &&
1716 (dev_priv->vbt.edp.bpp && dev_priv->vbt.edp.bpp < bpp)) {
1717 DRM_DEBUG_KMS("clamping bpp for eDP panel to BIOS-provided %i\n",
1718 dev_priv->vbt.edp.bpp);
1719 bpp = dev_priv->vbt.edp.bpp;
1720 }
1721
1722 /*
1723 * Use the maximum clock and number of lanes the eDP panel
1724 * advertizes being capable of. The panels are generally
1725 * designed to support only a single clock and lane
1726 * configuration, and typically these values correspond to the
1727 * native resolution of the panel.
1728 */
> 1729 if(dpcd[DP_DPCD_REV] < DPCD_REV_14){
1730 min_lane_count = max_lane_count;
1731 min_clock = max_clock;
1732 }
1733 }
1734
1735 for (; bpp >= 6*3; bpp -= 2*3) {
1736 mode_rate = intel_dp_link_required(adjusted_mode->crtc_clock,
1737 bpp);
1738
1739 for (clock = min_clock; clock <= max_clock; clock++) {
1740 for (lane_count = min_lane_count;
1741 lane_count <= max_lane_count;
1742 lane_count <<= 1) {
1743
1744 link_clock = intel_dp->common_rates[clock];
1745 link_avail = intel_dp_max_data_rate(link_clock,
1746 lane_count);
1747
1748 if (mode_rate <= link_avail) {
1749 goto found;
1750 }
1751 }
1752 }
1753 }
1754
1755 return false;
1756
1757 found:
1758 if (intel_conn_state->broadcast_rgb == INTEL_BROADCAST_RGB_AUTO) {
1759 /*
1760 * See:
1761 * CEA-861-E - 5.1 Default Encoding Parameters
1762 * VESA DisplayPort Ver.1.2a - 5.1.1.1 Video Colorimetry
1763 */
1764 pipe_config->limited_color_range =
1765 bpp != 18 &&
1766 drm_default_rgb_quant_range(adjusted_mode) ==
1767 HDMI_QUANTIZATION_RANGE_LIMITED;
1768 } else {
1769 pipe_config->limited_color_range =
1770 intel_conn_state->broadcast_rgb == INTEL_BROADCAST_RGB_LIMITED;
1771 }
1772
1773 pipe_config->lane_count = lane_count;
1774
1775 pipe_config->pipe_bpp = bpp;
1776 pipe_config->port_clock = intel_dp->common_rates[clock];
1777
1778 intel_dp_compute_rate(intel_dp, pipe_config->port_clock,
1779 &link_bw, &rate_select);
1780
1781 DRM_DEBUG_KMS("DP link bw %02x rate select %02x lane count %d clock %d bpp %d\n",
1782 link_bw, rate_select, pipe_config->lane_count,
1783 pipe_config->port_clock, bpp);
1784 DRM_DEBUG_KMS("DP link bw required %i available %i\n",
1785 mode_rate, link_avail);
1786
1787 intel_link_compute_m_n(bpp, lane_count,
1788 adjusted_mode->crtc_clock,
1789 pipe_config->port_clock,
1790 &pipe_config->dp_m_n,
1791 reduce_m_n);
1792
1793 if (intel_connector->panel.downclock_mode != NULL &&
1794 dev_priv->drrs.type == SEAMLESS_DRRS_SUPPORT) {
1795 pipe_config->has_drrs = true;
1796 intel_link_compute_m_n(bpp, lane_count,
1797 intel_connector->panel.downclock_mode->clock,
1798 pipe_config->port_clock,
1799 &pipe_config->dp_m2_n2,
1800 reduce_m_n);
1801 }
1802
1803 /*
1804 * DPLL0 VCO may need to be adjusted to get the correct
1805 * clock for eDP. This will affect cdclk as well.
1806 */
1807 if (intel_dp_is_edp(intel_dp) && IS_GEN9_BC(dev_priv)) {
1808 int vco;
1809
1810 switch (pipe_config->port_clock / 2) {
1811 case 108000:
1812 case 216000:
1813 vco = 8640000;
1814 break;
1815 default:
1816 vco = 8100000;
1817 break;
1818 }
1819
1820 to_intel_atomic_state(pipe_config->base.state)->cdclk.logical.vco = vco;
1821 }
1822
1823 if (!HAS_DDI(dev_priv))
1824 intel_dp_set_clock(encoder, pipe_config);
1825
1826 intel_psr_compute_config(intel_dp, pipe_config);
1827
1828 return true;
1829 }
1830
---
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