diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_tc.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_tc.c | 39 |
1 files changed, 35 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_tc.c b/drivers/gpu/drm/i915/display/intel_tc.c index b16c4d2d4077..33b8f2772076 100644 --- a/drivers/gpu/drm/i915/display/intel_tc.c +++ b/drivers/gpu/drm/i915/display/intel_tc.c @@ -1013,21 +1013,52 @@ xelpdp_tc_phy_wait_for_tcss_power(struct intel_tc_port *tc, bool enabled) return true; } +/* + * Gfx driver WA 14020908590 for PTL tcss_rxdetect_clkswb_req/ack + * handshake violation when pwwreq= 0->1 during TC7/10 entry + */ +static void xelpdp_tc_power_request_wa(struct intel_display *display, bool enable) +{ + /* check if mailbox is running busy */ + if (intel_de_wait_for_clear(display, TCSS_DISP_MAILBOX_IN_CMD, + TCSS_DISP_MAILBOX_IN_CMD_RUN_BUSY, 10)) { + drm_dbg_kms(display->drm, + "Timeout waiting for TCSS mailbox run/busy bit to clear\n"); + return; + } + + intel_de_write(display, TCSS_DISP_MAILBOX_IN_DATA, enable ? 1 : 0); + intel_de_write(display, TCSS_DISP_MAILBOX_IN_CMD, + TCSS_DISP_MAILBOX_IN_CMD_RUN_BUSY | + TCSS_DISP_MAILBOX_IN_CMD_DATA(0x1)); + + /* wait to clear mailbox running busy bit before continuing */ + if (intel_de_wait_for_clear(display, TCSS_DISP_MAILBOX_IN_CMD, + TCSS_DISP_MAILBOX_IN_CMD_RUN_BUSY, 10)) { + drm_dbg_kms(display->drm, + "Timeout after writing data to mailbox. Mailbox run/busy bit did not clear\n"); + return; + } +} + static void __xelpdp_tc_phy_enable_tcss_power(struct intel_tc_port *tc, bool enable) { - struct drm_i915_private *i915 = tc_to_i915(tc); + struct intel_display *display = to_intel_display(tc->dig_port); enum port port = tc->dig_port->base.port; - i915_reg_t reg = XELPDP_PORT_BUF_CTL1(i915, port); + i915_reg_t reg = XELPDP_PORT_BUF_CTL1(display, port); u32 val; assert_tc_cold_blocked(tc); - val = intel_de_read(i915, reg); + if (DISPLAY_VER(display) == 30) + xelpdp_tc_power_request_wa(display, enable); + + val = intel_de_read(display, reg); if (enable) val |= XELPDP_TCSS_POWER_REQUEST; else val &= ~XELPDP_TCSS_POWER_REQUEST; - intel_de_write(i915, reg, val); + intel_de_write(display, reg, val); } static bool xelpdp_tc_phy_enable_tcss_power(struct intel_tc_port *tc, bool enable) |