diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dp_aux.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_aux.c | 74 |
1 files changed, 51 insertions, 23 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux.c b/drivers/gpu/drm/i915/display/intel_dp_aux.c index 40c697476b72..9c9b6410366d 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_aux.c +++ b/drivers/gpu/drm/i915/display/intel_dp_aux.c @@ -3,13 +3,16 @@ * Copyright © 2020-2021 Intel Corporation */ -#include "i915_drv.h" -#include "i915_reg.h" +#include <drm/drm_print.h> + #include "intel_de.h" +#include "intel_display_jiffies.h" #include "intel_display_types.h" +#include "intel_display_utils.h" #include "intel_dp.h" #include "intel_dp_aux.h" #include "intel_dp_aux_regs.h" +#include "intel_parent.h" #include "intel_pps.h" #include "intel_quirks.h" #include "intel_tc.h" @@ -58,14 +61,26 @@ intel_dp_aux_wait_done(struct intel_dp *intel_dp) struct intel_display *display = to_intel_display(intel_dp); i915_reg_t ch_ctl = intel_dp->aux_ch_ctl_reg(intel_dp); const unsigned int timeout_ms = 10; + bool done = true; u32 status; int ret; - ret = intel_de_wait_custom(display, ch_ctl, DP_AUX_CH_CTL_SEND_BUSY, - 0, - 2, timeout_ms, &status); + if (intel_parent_irq_enabled(display)) { +#define C (((status = intel_de_read_notrace(display, ch_ctl)) & DP_AUX_CH_CTL_SEND_BUSY) == 0) + done = wait_event_timeout(display->gmbus.wait_queue, C, + msecs_to_jiffies_timeout(timeout_ms)); + +#undef C + } else { + ret = intel_de_wait_ms(display, ch_ctl, + DP_AUX_CH_CTL_SEND_BUSY, 0, + timeout_ms, &status); + + if (ret == -ETIMEDOUT) + done = false; + } - if (ret == -ETIMEDOUT) + if (!done) drm_err(display->drm, "%s: did not complete or timeout within %ums (status 0x%08x)\n", intel_dp->aux.name, timeout_ms, status); @@ -111,10 +126,9 @@ static u32 ilk_get_aux_clock_divider(struct intel_dp *intel_dp, int index) static u32 hsw_get_aux_clock_divider(struct intel_dp *intel_dp, int index) { struct intel_display *display = to_intel_display(intel_dp); - struct drm_i915_private *i915 = to_i915(display->drm); struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); - if (dig_port->aux_ch != AUX_CH_A && HAS_PCH_LPT_H(i915)) { + if (dig_port->aux_ch != AUX_CH_A && HAS_PCH_LPT_H(display)) { /* Workaround for non-ULT HSW */ switch (index) { case 0: return 63; @@ -177,12 +191,11 @@ static u32 g4x_get_aux_send_ctl(struct intel_dp *intel_dp, int send_bytes, u32 aux_clock_divider) { - struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); - struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); + struct intel_display *display = to_intel_display(intel_dp); u32 timeout; /* Max timeout value on G4x-BDW: 1.6ms */ - if (IS_BROADWELL(i915)) + if (display->platform.broadwell) timeout = DP_AUX_CH_CTL_TIME_OUT_600us; else timeout = DP_AUX_CH_CTL_TIME_OUT_400us; @@ -243,12 +256,11 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp, struct intel_display *display = to_intel_display(intel_dp); struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); struct intel_encoder *encoder = &dig_port->base; - struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); i915_reg_t ch_ctl, ch_data[5]; u32 aux_clock_divider; enum intel_display_power_domain aux_domain; - intel_wakeref_t aux_wakeref; - intel_wakeref_t pps_wakeref; + struct ref_tracker *aux_wakeref; + struct ref_tracker *pps_wakeref = NULL; int i, ret, recv_bytes; int try, clock = 0; u32 status; @@ -272,8 +284,21 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp, aux_domain = intel_aux_power_domain(dig_port); - aux_wakeref = intel_display_power_get(i915, aux_domain); - pps_wakeref = intel_pps_lock(intel_dp); + aux_wakeref = intel_display_power_get(display, aux_domain); + + /* + * The PPS state needs to be locked for: + * - eDP on all platforms, since AUX transfers on eDP need VDD power + * (either forced or via panel power) which depends on the PPS + * state. + * - non-eDP on platforms where the PPS is a pipe instance (VLV/CHV), + * since changing the PPS state (via a parallel modeset for + * instance) may interfere with the AUX transfers on a non-eDP + * output as well. + */ + if (intel_dp_is_edp(intel_dp) || + display->platform.valleyview || display->platform.cherryview) + pps_wakeref = intel_pps_lock(intel_dp); /* * We will be called with VDD already enabled for dpcd/edid/oui reads. @@ -431,8 +456,10 @@ out: if (vdd) intel_pps_vdd_off_unlocked(intel_dp, false); - intel_pps_unlock(intel_dp, pps_wakeref); - intel_display_power_put_async(i915, aux_domain, aux_wakeref); + if (pps_wakeref) + intel_pps_unlock(intel_dp, pps_wakeref); + + intel_display_power_put_async(display, aux_domain, aux_wakeref); out_unlock: intel_digital_port_unlock(encoder); @@ -772,7 +799,6 @@ void intel_dp_aux_fini(struct intel_dp *intel_dp) void intel_dp_aux_init(struct intel_dp *intel_dp) { struct intel_display *display = to_intel_display(intel_dp); - struct drm_i915_private *i915 = to_i915(display->drm); struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); struct intel_encoder *encoder = &dig_port->base; enum aux_ch aux_ch = dig_port->aux_ch; @@ -787,10 +813,10 @@ void intel_dp_aux_init(struct intel_dp *intel_dp) } else if (DISPLAY_VER(display) >= 9) { intel_dp->aux_ch_ctl_reg = skl_aux_ctl_reg; intel_dp->aux_ch_data_reg = skl_aux_data_reg; - } else if (HAS_PCH_SPLIT(i915)) { + } else if (HAS_PCH_SPLIT(display)) { intel_dp->aux_ch_ctl_reg = ilk_aux_ctl_reg; intel_dp->aux_ch_data_reg = ilk_aux_data_reg; - } else if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915)) { + } else if (display->platform.valleyview || display->platform.cherryview) { intel_dp->aux_ch_ctl_reg = vlv_aux_ctl_reg; intel_dp->aux_ch_data_reg = vlv_aux_data_reg; } else { @@ -800,9 +826,9 @@ void intel_dp_aux_init(struct intel_dp *intel_dp) if (DISPLAY_VER(display) >= 9) intel_dp->get_aux_clock_divider = skl_get_aux_clock_divider; - else if (IS_BROADWELL(i915) || IS_HASWELL(i915)) + else if (display->platform.broadwell || display->platform.haswell) intel_dp->get_aux_clock_divider = hsw_get_aux_clock_divider; - else if (HAS_PCH_SPLIT(i915)) + else if (HAS_PCH_SPLIT(display)) intel_dp->get_aux_clock_divider = ilk_get_aux_clock_divider; else intel_dp->get_aux_clock_divider = g4x_get_aux_clock_divider; @@ -822,6 +848,8 @@ void intel_dp_aux_init(struct intel_dp *intel_dp) intel_dp->aux.transfer = intel_dp_aux_transfer; cpu_latency_qos_add_request(&intel_dp->pm_qos, PM_QOS_DEFAULT_VALUE); + + intel_dp_dpcd_set_probe(intel_dp, true); } static enum aux_ch default_aux_ch(struct intel_encoder *encoder) |