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 | 452 |
1 files changed, 334 insertions, 118 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux.c b/drivers/gpu/drm/i915/display/intel_dp_aux.c index 7c048d2ecf43..809799f63e32 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_aux.c +++ b/drivers/gpu/drm/i915/display/intel_dp_aux.c @@ -3,14 +3,35 @@ * Copyright © 2020-2021 Intel Corporation */ -#include "i915_drv.h" -#include "i915_trace.h" +#include <drm/drm_print.h> + +#include "intel_de.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_pps.h" +#include "intel_quirks.h" #include "intel_tc.h" +#include "intel_uncore_trace.h" + +#define AUX_CH_NAME_BUFSIZE 6 + +static const char *aux_ch_name(struct intel_display *display, + char *buf, int size, enum aux_ch aux_ch) +{ + if (DISPLAY_VER(display) >= 13 && aux_ch >= AUX_CH_D_XELPD) + snprintf(buf, size, "%c", 'A' + aux_ch - AUX_CH_D_XELPD + AUX_CH_D); + else if (DISPLAY_VER(display) >= 12 && aux_ch >= AUX_CH_USBC1) + snprintf(buf, size, "USBC%c", '1' + aux_ch - AUX_CH_USBC1); + else + snprintf(buf, size, "%c", 'A' + aux_ch); + + return buf; +} -u32 intel_dp_pack_aux(const u8 *src, int src_bytes) +u32 intel_dp_aux_pack(const u8 *src, int src_bytes) { int i; u32 v = 0; @@ -22,7 +43,7 @@ u32 intel_dp_pack_aux(const u8 *src, int src_bytes) return v; } -static void intel_dp_unpack_aux(u32 src, u8 *dst, int dst_bytes) +static void intel_dp_aux_unpack(u32 src, u8 *dst, int dst_bytes) { int i; @@ -35,31 +56,27 @@ static void intel_dp_unpack_aux(u32 src, u8 *dst, int dst_bytes) static u32 intel_dp_aux_wait_done(struct intel_dp *intel_dp) { - struct drm_i915_private *i915 = dp_to_i915(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; u32 status; - bool done; - -#define C (((status = intel_uncore_read_notrace(&i915->uncore, ch_ctl)) & DP_AUX_CH_CTL_SEND_BUSY) == 0) - done = wait_event_timeout(i915->gmbus_wait_queue, C, - msecs_to_jiffies_timeout(timeout_ms)); + int ret; - /* just trace the final value */ - trace_i915_reg_rw(false, ch_ctl, status, sizeof(status), true); + ret = intel_de_wait_ms(display, ch_ctl, + DP_AUX_CH_CTL_SEND_BUSY, 0, + timeout_ms, &status); - if (!done) - drm_err(&i915->drm, + if (ret == -ETIMEDOUT) + drm_err(display->drm, "%s: did not complete or timeout within %ums (status 0x%08x)\n", intel_dp->aux.name, timeout_ms, status); -#undef C return status; } static u32 g4x_get_aux_clock_divider(struct intel_dp *intel_dp, int index) { - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); + struct intel_display *display = to_intel_display(intel_dp); if (index) return 0; @@ -68,12 +85,12 @@ static u32 g4x_get_aux_clock_divider(struct intel_dp *intel_dp, int index) * The clock divider is based off the hrawclk, and would like to run at * 2MHz. So, take the hrawclk value and divide by 2000 and use that */ - return DIV_ROUND_CLOSEST(RUNTIME_INFO(dev_priv)->rawclk_freq, 2000); + return DIV_ROUND_CLOSEST(DISPLAY_RUNTIME_INFO(display)->rawclk_freq, 2000); } static u32 ilk_get_aux_clock_divider(struct intel_dp *intel_dp, int index) { - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); + struct intel_display *display = to_intel_display(intel_dp); struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); u32 freq; @@ -86,18 +103,18 @@ static u32 ilk_get_aux_clock_divider(struct intel_dp *intel_dp, int index) * divide by 2000 and use that */ if (dig_port->aux_ch == AUX_CH_A) - freq = dev_priv->cdclk.hw.cdclk; + freq = display->cdclk.hw.cdclk; else - freq = RUNTIME_INFO(dev_priv)->rawclk_freq; + freq = DISPLAY_RUNTIME_INFO(display)->rawclk_freq; return DIV_ROUND_CLOSEST(freq, 2000); } static u32 hsw_get_aux_clock_divider(struct intel_dp *intel_dp, int index) { - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); + struct intel_display *display = to_intel_display(intel_dp); struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); - if (dig_port->aux_ch != AUX_CH_A && HAS_PCH_LPT_H(dev_priv)) { + if (dig_port->aux_ch != AUX_CH_A && HAS_PCH_LPT_H(display)) { /* Workaround for non-ULT HSW */ switch (index) { case 0: return 63; @@ -119,62 +136,100 @@ static u32 skl_get_aux_clock_divider(struct intel_dp *intel_dp, int index) return index ? 0 : 1; } +static int intel_dp_aux_sync_len(void) +{ + int precharge = 16; /* 10-16 */ + int preamble = 16; + + return precharge + preamble; +} + +int intel_dp_aux_fw_sync_len(struct intel_dp *intel_dp) +{ + int precharge = 10; /* 10-16 */ + int preamble = 8; + + /* + * We faced some glitches on Dell Precision 5490 MTL laptop with panel: + * "Manufacturer: AUO, Model: 63898" when using HW default 18. Using 20 + * is fixing these problems with the panel. It is still within range + * mentioned in eDP specification. Increasing Fast Wake sync length is + * causing problems with other panels: increase length as a quirk for + * this specific laptop. + */ + if (intel_has_dpcd_quirk(intel_dp, QUIRK_FW_SYNC_LEN)) + precharge += 2; + + return precharge + preamble; +} + +static int g4x_dp_aux_precharge_len(void) +{ + int precharge_min = 10; + int preamble = 16; + + /* HW wants the length of the extra precharge in 2us units */ + return (intel_dp_aux_sync_len() - + precharge_min - preamble) / 2; +} + 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 *dev_priv = - 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(dev_priv)) + if (display->platform.broadwell) timeout = DP_AUX_CH_CTL_TIME_OUT_600us; else timeout = DP_AUX_CH_CTL_TIME_OUT_400us; return DP_AUX_CH_CTL_SEND_BUSY | - DP_AUX_CH_CTL_DONE | - DP_AUX_CH_CTL_INTERRUPT | - DP_AUX_CH_CTL_TIME_OUT_ERROR | - timeout | - DP_AUX_CH_CTL_RECEIVE_ERROR | - (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) | - (3 << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) | - (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT); + DP_AUX_CH_CTL_DONE | + DP_AUX_CH_CTL_INTERRUPT | + DP_AUX_CH_CTL_TIME_OUT_ERROR | + timeout | + DP_AUX_CH_CTL_RECEIVE_ERROR | + DP_AUX_CH_CTL_MESSAGE_SIZE(send_bytes) | + DP_AUX_CH_CTL_PRECHARGE_2US(g4x_dp_aux_precharge_len()) | + DP_AUX_CH_CTL_BIT_CLOCK_2X(aux_clock_divider); } static u32 skl_get_aux_send_ctl(struct intel_dp *intel_dp, int send_bytes, u32 unused) { + struct intel_display *display = to_intel_display(intel_dp); struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); - struct drm_i915_private *i915 = - to_i915(dig_port->base.base.dev); - enum phy phy = intel_port_to_phy(i915, dig_port->base.port); u32 ret; /* * Max timeout values: * SKL-GLK: 1.6ms - * CNL: 3.2ms * ICL+: 4ms */ ret = DP_AUX_CH_CTL_SEND_BUSY | - DP_AUX_CH_CTL_DONE | - DP_AUX_CH_CTL_INTERRUPT | - DP_AUX_CH_CTL_TIME_OUT_ERROR | - DP_AUX_CH_CTL_TIME_OUT_MAX | - DP_AUX_CH_CTL_RECEIVE_ERROR | - (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) | - DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL(32) | - DP_AUX_CH_CTL_SYNC_PULSE_SKL(32); - - if (intel_phy_is_tc(i915, phy) && - dig_port->tc_mode == TC_PORT_TBT_ALT) + DP_AUX_CH_CTL_DONE | + DP_AUX_CH_CTL_INTERRUPT | + DP_AUX_CH_CTL_TIME_OUT_ERROR | + DP_AUX_CH_CTL_TIME_OUT_MAX | + DP_AUX_CH_CTL_RECEIVE_ERROR | + DP_AUX_CH_CTL_MESSAGE_SIZE(send_bytes) | + DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL(intel_dp_aux_fw_sync_len(intel_dp)) | + DP_AUX_CH_CTL_SYNC_PULSE_SKL(intel_dp_aux_sync_len()); + + if (intel_tc_port_in_tbt_alt_mode(dig_port)) ret |= DP_AUX_CH_CTL_TBT_IO; + /* + * Power request bit is already set during aux power well enable. + * Preserve the bit across aux transactions. + */ + if (DISPLAY_VER(display) >= 14) + ret |= XELPDP_DP_AUX_CH_CTL_POWER_REQUEST; + return ret; } @@ -184,17 +239,14 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp, u8 *recv, int recv_size, u32 aux_send_ctl_flags) { + struct intel_display *display = to_intel_display(intel_dp); 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_uncore *uncore = &i915->uncore; - enum phy phy = intel_port_to_phy(i915, dig_port->base.port); - bool is_tc_port = intel_phy_is_tc(i915, phy); + struct intel_encoder *encoder = &dig_port->base; 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; + intel_wakeref_t pps_wakeref = NULL; int i, ret, recv_bytes; int try, clock = 0; u32 status; @@ -204,13 +256,35 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp, for (i = 0; i < ARRAY_SIZE(ch_data); i++) ch_data[i] = intel_dp->aux_ch_data_reg(intel_dp, i); - if (is_tc_port) - intel_tc_port_lock(dig_port); + intel_digital_port_lock(encoder); + /* + * Abort transfers on a disconnected port as required by + * DP 1.4a link CTS 4.2.1.5, also avoiding the long AUX + * timeouts that would otherwise happen. + */ + if (!intel_dp_is_edp(intel_dp) && + !intel_digital_port_connected_locked(&dig_port->base)) { + ret = -ENXIO; + goto out_unlock; + } 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. @@ -229,9 +303,14 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp, intel_pps_check_power_unlocked(intel_dp); + /* + * FIXME PSR should be disabled here to prevent + * it using the same AUX CH simultaneously + */ + /* Try to wait for any previous AUX channel activity */ for (try = 0; try < 3; try++) { - status = intel_uncore_read_notrace(uncore, ch_ctl); + status = intel_de_read_notrace(display, ch_ctl); if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0) break; msleep(1); @@ -240,10 +319,10 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp, trace_i915_reg_rw(false, ch_ctl, status, sizeof(status), true); if (try == 3) { - const u32 status = intel_uncore_read(uncore, ch_ctl); + const u32 status = intel_de_read(display, ch_ctl); if (status != intel_dp->aux_busy_last_status) { - drm_WARN(&i915->drm, 1, + drm_WARN(display->drm, 1, "%s: not started (status 0x%08x)\n", intel_dp->aux.name, status); intel_dp->aux_busy_last_status = status; @@ -254,7 +333,7 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp, } /* Only 5 data registers! */ - if (drm_WARN_ON(&i915->drm, send_bytes > 20 || recv_size > 20)) { + if (drm_WARN_ON(display->drm, send_bytes > 20 || recv_size > 20)) { ret = -E2BIG; goto out; } @@ -270,23 +349,20 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp, for (try = 0; try < 5; try++) { /* Load the send data into the aux channel data registers */ for (i = 0; i < send_bytes; i += 4) - intel_uncore_write(uncore, - ch_data[i >> 2], - intel_dp_pack_aux(send + i, - send_bytes - i)); + intel_de_write(display, ch_data[i >> 2], + intel_dp_aux_pack(send + i, + send_bytes - i)); /* Send the command and wait for it to complete */ - intel_uncore_write(uncore, ch_ctl, send_ctl); + intel_de_write(display, ch_ctl, send_ctl); status = intel_dp_aux_wait_done(intel_dp); /* Clear done status and any errors */ - intel_uncore_write(uncore, - ch_ctl, - status | - DP_AUX_CH_CTL_DONE | - DP_AUX_CH_CTL_TIME_OUT_ERROR | - DP_AUX_CH_CTL_RECEIVE_ERROR); + intel_de_write(display, ch_ctl, + status | DP_AUX_CH_CTL_DONE | + DP_AUX_CH_CTL_TIME_OUT_ERROR | + DP_AUX_CH_CTL_RECEIVE_ERROR); /* * DP CTS 1.2 Core Rev 1.1, 4.2.1.1 & 4.2.1.2 @@ -307,7 +383,7 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp, } if ((status & DP_AUX_CH_CTL_DONE) == 0) { - drm_err(&i915->drm, "%s: not done (status 0x%08x)\n", + drm_err(display->drm, "%s: not done (status 0x%08x)\n", intel_dp->aux.name, status); ret = -EBUSY; goto out; @@ -319,7 +395,7 @@ done: * not connected. */ if (status & DP_AUX_CH_CTL_RECEIVE_ERROR) { - drm_err(&i915->drm, "%s: receive error (status 0x%08x)\n", + drm_err(display->drm, "%s: receive error (status 0x%08x)\n", intel_dp->aux.name, status); ret = -EIO; goto out; @@ -330,15 +406,14 @@ done: * -- don't fill the kernel log with these */ if (status & DP_AUX_CH_CTL_TIME_OUT_ERROR) { - drm_dbg_kms(&i915->drm, "%s: timeout (status 0x%08x)\n", + drm_dbg_kms(display->drm, "%s: timeout (status 0x%08x)\n", intel_dp->aux.name, status); ret = -ETIMEDOUT; goto out; } /* Unload any bytes sent back from the other side */ - recv_bytes = ((status & DP_AUX_CH_CTL_MESSAGE_SIZE_MASK) >> - DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT); + recv_bytes = REG_FIELD_GET(DP_AUX_CH_CTL_MESSAGE_SIZE_MASK, status); /* * By BSpec: "Message sizes of 0 or >20 are not allowed." @@ -346,7 +421,7 @@ done: * drm layer takes care for the necessary retries. */ if (recv_bytes == 0 || recv_bytes > 20) { - drm_dbg_kms(&i915->drm, + drm_dbg_kms(display->drm, "%s: Forbidden recv_bytes = %d on aux transaction\n", intel_dp->aux.name, recv_bytes); ret = -EBUSY; @@ -357,7 +432,7 @@ done: recv_bytes = recv_size; for (i = 0; i < recv_bytes; i += 4) - intel_dp_unpack_aux(intel_uncore_read(uncore, ch_data[i >> 2]), + intel_dp_aux_unpack(intel_de_read(display, ch_data[i >> 2]), recv + i, recv_bytes - i); ret = recv_bytes; @@ -367,11 +442,12 @@ 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); - if (is_tc_port) - intel_tc_port_unlock(dig_port); + intel_display_power_put_async(display, aux_domain, aux_wakeref); +out_unlock: + intel_digital_port_unlock(encoder); return ret; } @@ -407,7 +483,7 @@ static ssize_t intel_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg) { struct intel_dp *intel_dp = container_of(aux, struct intel_dp, aux); - struct drm_i915_private *i915 = dp_to_i915(intel_dp); + struct intel_display *display = to_intel_display(intel_dp); u8 txbuf[20], rxbuf[20]; size_t txsize, rxsize; u32 flags = intel_dp_aux_xfer_flags(msg); @@ -422,10 +498,10 @@ intel_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg) txsize = msg->size ? HEADER_SIZE + msg->size : BARE_ADDRESS_SIZE; rxsize = 2; /* 0 or 1 data bytes */ - if (drm_WARN_ON(&i915->drm, txsize > 20)) + if (drm_WARN_ON(display->drm, txsize > 20)) return -E2BIG; - drm_WARN_ON(&i915->drm, !msg->buffer != !msg->size); + drm_WARN_ON(display->drm, !msg->buffer != !msg->size); if (msg->buffer) memcpy(txbuf + HEADER_SIZE, msg->buffer, msg->size); @@ -450,7 +526,7 @@ intel_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg) txsize = msg->size ? HEADER_SIZE : BARE_ADDRESS_SIZE; rxsize = msg->size + 1; - if (drm_WARN_ON(&i915->drm, rxsize > 20)) + if (drm_WARN_ON(display->drm, rxsize > 20)) return -E2BIG; ret = intel_dp_aux_xfer(intel_dp, txbuf, txsize, @@ -476,9 +552,40 @@ intel_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg) return ret; } +static i915_reg_t vlv_aux_ctl_reg(struct intel_dp *intel_dp) +{ + struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); + enum aux_ch aux_ch = dig_port->aux_ch; + + switch (aux_ch) { + case AUX_CH_B: + case AUX_CH_C: + case AUX_CH_D: + return VLV_DP_AUX_CH_CTL(aux_ch); + default: + MISSING_CASE(aux_ch); + return VLV_DP_AUX_CH_CTL(AUX_CH_B); + } +} + +static i915_reg_t vlv_aux_data_reg(struct intel_dp *intel_dp, int index) +{ + struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); + enum aux_ch aux_ch = dig_port->aux_ch; + + switch (aux_ch) { + case AUX_CH_B: + case AUX_CH_C: + case AUX_CH_D: + return VLV_DP_AUX_CH_DATA(aux_ch, index); + default: + MISSING_CASE(aux_ch); + return VLV_DP_AUX_CH_DATA(AUX_CH_B, index); + } +} + static i915_reg_t g4x_aux_ctl_reg(struct intel_dp *intel_dp) { - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); enum aux_ch aux_ch = dig_port->aux_ch; @@ -495,7 +602,6 @@ static i915_reg_t g4x_aux_ctl_reg(struct intel_dp *intel_dp) static i915_reg_t g4x_aux_data_reg(struct intel_dp *intel_dp, int index) { - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); enum aux_ch aux_ch = dig_port->aux_ch; @@ -512,7 +618,6 @@ static i915_reg_t g4x_aux_data_reg(struct intel_dp *intel_dp, int index) static i915_reg_t ilk_aux_ctl_reg(struct intel_dp *intel_dp) { - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); enum aux_ch aux_ch = dig_port->aux_ch; @@ -531,7 +636,6 @@ static i915_reg_t ilk_aux_ctl_reg(struct intel_dp *intel_dp) static i915_reg_t ilk_aux_data_reg(struct intel_dp *intel_dp, int index) { - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); enum aux_ch aux_ch = dig_port->aux_ch; @@ -550,7 +654,6 @@ static i915_reg_t ilk_aux_data_reg(struct intel_dp *intel_dp, int index) static i915_reg_t skl_aux_ctl_reg(struct intel_dp *intel_dp) { - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); enum aux_ch aux_ch = dig_port->aux_ch; @@ -570,7 +673,6 @@ static i915_reg_t skl_aux_ctl_reg(struct intel_dp *intel_dp) static i915_reg_t skl_aux_data_reg(struct intel_dp *intel_dp, int index) { - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); enum aux_ch aux_ch = dig_port->aux_ch; @@ -590,7 +692,6 @@ static i915_reg_t skl_aux_data_reg(struct intel_dp *intel_dp, int index) static i915_reg_t tgl_aux_ctl_reg(struct intel_dp *intel_dp) { - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); enum aux_ch aux_ch = dig_port->aux_ch; @@ -613,7 +714,6 @@ static i915_reg_t tgl_aux_ctl_reg(struct intel_dp *intel_dp) static i915_reg_t tgl_aux_data_reg(struct intel_dp *intel_dp, int index) { - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); enum aux_ch aux_ch = dig_port->aux_ch; @@ -634,6 +734,46 @@ static i915_reg_t tgl_aux_data_reg(struct intel_dp *intel_dp, int index) } } +static i915_reg_t xelpdp_aux_ctl_reg(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); + enum aux_ch aux_ch = dig_port->aux_ch; + + switch (aux_ch) { + case AUX_CH_A: + case AUX_CH_B: + case AUX_CH_USBC1: + case AUX_CH_USBC2: + case AUX_CH_USBC3: + case AUX_CH_USBC4: + return XELPDP_DP_AUX_CH_CTL(display, aux_ch); + default: + MISSING_CASE(aux_ch); + return XELPDP_DP_AUX_CH_CTL(display, AUX_CH_A); + } +} + +static i915_reg_t xelpdp_aux_data_reg(struct intel_dp *intel_dp, int index) +{ + struct intel_display *display = to_intel_display(intel_dp); + struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); + enum aux_ch aux_ch = dig_port->aux_ch; + + switch (aux_ch) { + case AUX_CH_A: + case AUX_CH_B: + case AUX_CH_USBC1: + case AUX_CH_USBC2: + case AUX_CH_USBC3: + case AUX_CH_USBC4: + return XELPDP_DP_AUX_CH_DATA(display, aux_ch, index); + default: + MISSING_CASE(aux_ch); + return XELPDP_DP_AUX_CH_DATA(display, AUX_CH_A, index); + } +} + void intel_dp_aux_fini(struct intel_dp *intel_dp) { if (cpu_latency_qos_request_active(&intel_dp->pm_qos)) @@ -644,56 +784,132 @@ void intel_dp_aux_fini(struct intel_dp *intel_dp) void intel_dp_aux_init(struct intel_dp *intel_dp) { - struct drm_i915_private *dev_priv = dp_to_i915(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; enum aux_ch aux_ch = dig_port->aux_ch; + char buf[AUX_CH_NAME_BUFSIZE]; - if (DISPLAY_VER(dev_priv) >= 12) { + if (DISPLAY_VER(display) >= 14) { + intel_dp->aux_ch_ctl_reg = xelpdp_aux_ctl_reg; + intel_dp->aux_ch_data_reg = xelpdp_aux_data_reg; + } else if (DISPLAY_VER(display) >= 12) { intel_dp->aux_ch_ctl_reg = tgl_aux_ctl_reg; intel_dp->aux_ch_data_reg = tgl_aux_data_reg; - } else if (DISPLAY_VER(dev_priv) >= 9) { + } 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(dev_priv)) { + } 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 (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 { intel_dp->aux_ch_ctl_reg = g4x_aux_ctl_reg; intel_dp->aux_ch_data_reg = g4x_aux_data_reg; } - if (DISPLAY_VER(dev_priv) >= 9) + if (DISPLAY_VER(display) >= 9) intel_dp->get_aux_clock_divider = skl_get_aux_clock_divider; - else if (IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv)) + else if (display->platform.broadwell || display->platform.haswell) intel_dp->get_aux_clock_divider = hsw_get_aux_clock_divider; - else if (HAS_PCH_SPLIT(dev_priv)) + 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; - if (DISPLAY_VER(dev_priv) >= 9) + if (DISPLAY_VER(display) >= 9) intel_dp->get_aux_send_ctl = skl_get_aux_send_ctl; else intel_dp->get_aux_send_ctl = g4x_get_aux_send_ctl; - intel_dp->aux.drm_dev = &dev_priv->drm; + intel_dp->aux.drm_dev = display->drm; drm_dp_aux_init(&intel_dp->aux); /* Failure to allocate our preferred name is not critical */ - if (DISPLAY_VER(dev_priv) >= 13 && aux_ch >= AUX_CH_D_XELPD) - intel_dp->aux.name = kasprintf(GFP_KERNEL, "AUX %c/%s", - aux_ch_name(aux_ch - AUX_CH_D_XELPD + AUX_CH_D), - encoder->base.name); - else if (DISPLAY_VER(dev_priv) >= 12 && aux_ch >= AUX_CH_USBC1) - intel_dp->aux.name = kasprintf(GFP_KERNEL, "AUX USBC%c/%s", - aux_ch - AUX_CH_USBC1 + '1', - encoder->base.name); - else - intel_dp->aux.name = kasprintf(GFP_KERNEL, "AUX %c/%s", - aux_ch_name(aux_ch), - encoder->base.name); + intel_dp->aux.name = kasprintf(GFP_KERNEL, "AUX %s/%s", + aux_ch_name(display, buf, sizeof(buf), aux_ch), + encoder->base.name); 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) +{ + struct intel_display *display = to_intel_display(encoder); + + /* SKL has DDI E but no AUX E */ + if (DISPLAY_VER(display) == 9 && encoder->port == PORT_E) + return AUX_CH_A; + + return (enum aux_ch)encoder->port; +} + +static struct intel_encoder * +get_encoder_by_aux_ch(struct intel_encoder *encoder, + enum aux_ch aux_ch) +{ + struct intel_display *display = to_intel_display(encoder); + struct intel_encoder *other; + + for_each_intel_encoder(display->drm, other) { + if (other == encoder) + continue; + + if (!intel_encoder_is_dig_port(other)) + continue; + + if (enc_to_dig_port(other)->aux_ch == aux_ch) + return other; + } + + return NULL; +} + +enum aux_ch intel_dp_aux_ch(struct intel_encoder *encoder) +{ + struct intel_display *display = to_intel_display(encoder); + struct intel_encoder *other; + const char *source; + enum aux_ch aux_ch; + char buf[AUX_CH_NAME_BUFSIZE]; + + aux_ch = intel_bios_dp_aux_ch(encoder->devdata); + source = "VBT"; + + if (aux_ch == AUX_CH_NONE) { + aux_ch = default_aux_ch(encoder); + source = "platform default"; + } + + if (aux_ch == AUX_CH_NONE) + return AUX_CH_NONE; + + /* FIXME validate aux_ch against platform caps */ + + other = get_encoder_by_aux_ch(encoder, aux_ch); + if (other) { + drm_dbg_kms(display->drm, + "[ENCODER:%d:%s] AUX CH %s already claimed by [ENCODER:%d:%s]\n", + encoder->base.base.id, encoder->base.name, + aux_ch_name(display, buf, sizeof(buf), aux_ch), + other->base.base.id, other->base.name); + return AUX_CH_NONE; + } + + drm_dbg_kms(display->drm, + "[ENCODER:%d:%s] Using AUX CH %s (%s)\n", + encoder->base.base.id, encoder->base.name, + aux_ch_name(display, buf, sizeof(buf), aux_ch), source); + + return aux_ch; +} + +void intel_dp_aux_irq_handler(struct intel_display *display) +{ + wake_up_all(&display->gmbus.wait_queue); } |