From a62b749390630fd02525ed8abd29323319f9096e Mon Sep 17 00:00:00 2001 From: Ben Skeggs Date: Wed, 1 Jun 2022 20:46:34 +1000 Subject: drm/nouveau/disp: add method to control DPAUX pad power This removes the need for NVKM to track DP HPD events, as the KMS driver follows them already, and has better information available. Signed-off-by: Ben Skeggs Reviewed-by: Lyude Paul --- drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c | 90 +++++++++++------------- drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.h | 1 + drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.h | 4 +- drivers/gpu/drm/nouveau/nvkm/engine/disp/uoutp.c | 15 ++++ 4 files changed, 61 insertions(+), 49 deletions(-) (limited to 'drivers/gpu/drm/nouveau/nvkm/engine/disp') diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c index f1887b58f472..92c9faecffae 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c +++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.c @@ -612,18 +612,38 @@ nvkm_dp_enable_supported_link_rates(struct nvkm_outp *outp) return outp->dp.rates != 0; } -static bool -nvkm_dp_enable(struct nvkm_outp *outp, bool enable) +void +nvkm_dp_enable(struct nvkm_outp *outp, bool auxpwr) { + struct nvkm_gpio *gpio = outp->disp->engine.subdev.device->gpio; struct nvkm_i2c_aux *aux = outp->dp.aux; - if (enable) { - if (!outp->dp.present) { - OUTP_DBG(outp, "aux power -> always"); - nvkm_i2c_aux_monitor(aux, true); - outp->dp.present = true; + if (auxpwr && !outp->dp.aux_pwr) { + /* eDP panels need powering on by us (if the VBIOS doesn't default it + * to on) before doing any AUX channel transactions. LVDS panel power + * is handled by the SOR itself, and not required for LVDS DDC. + */ + if (outp->conn->info.type == DCB_CONNECTOR_eDP) { + int power = nvkm_gpio_get(gpio, 0, DCB_GPIO_PANEL_POWER, 0xff); + if (power == 0) { + nvkm_gpio_set(gpio, 0, DCB_GPIO_PANEL_POWER, 0xff, 1); + outp->dp.aux_pwr_pu = true; + } + + /* We delay here unconditionally, even if already powered, + * because some laptop panels having a significant resume + * delay before the panel begins responding. + * + * This is likely a bit of a hack, but no better idea for + * handling this at the moment. + */ + msleep(300); } + OUTP_DBG(outp, "aux power -> always"); + nvkm_i2c_aux_monitor(aux, true); + outp->dp.aux_pwr = true; + /* Detect any LTTPRs before reading DPCD receiver caps. */ if (!nvkm_rdaux(aux, DPCD_LTTPR_REV, outp->dp.lttpr, sizeof(outp->dp.lttpr)) && outp->dp.lttpr[0] >= 0x14 && outp->dp.lttpr[2]) { @@ -676,19 +696,24 @@ nvkm_dp_enable(struct nvkm_outp *outp, bool enable) outp->dp.rates++; } } - - return true; } - } - - if (outp->dp.present) { + } else + if (!auxpwr && outp->dp.aux_pwr) { OUTP_DBG(outp, "aux power -> demand"); nvkm_i2c_aux_monitor(aux, false); - outp->dp.present = false; - } + outp->dp.aux_pwr = false; + atomic_set(&outp->dp.lt.done, 0); - atomic_set(&outp->dp.lt.done, 0); - return false; + /* Restore eDP panel GPIO to its prior state if we changed it, as + * it could potentially interfere with other outputs. + */ + if (outp->conn->info.type == DCB_CONNECTOR_eDP) { + if (outp->dp.aux_pwr_pu) { + nvkm_gpio_set(gpio, 0, DCB_GPIO_PANEL_POWER, 0xff, 0); + outp->dp.aux_pwr_pu = false; + } + } + } } static int @@ -705,8 +730,6 @@ nvkm_dp_hpd(struct nvkm_notify *notify) if (atomic_read(&outp->dp.lt.done)) outp->func->acquire(outp); rep.mask |= NVIF_NOTIFY_CONN_V0_IRQ; - } else { - nvkm_dp_enable(outp, true); } if (line->mask & NVKM_I2C_UNPLUG) @@ -728,37 +751,8 @@ nvkm_dp_fini(struct nvkm_outp *outp) static void nvkm_dp_init(struct nvkm_outp *outp) { - struct nvkm_gpio *gpio = outp->disp->engine.subdev.device->gpio; - + nvkm_dp_enable(outp, outp->dp.enabled); nvkm_notify_put(&outp->conn->hpd); - - /* eDP panels need powering on by us (if the VBIOS doesn't default it - * to on) before doing any AUX channel transactions. LVDS panel power - * is handled by the SOR itself, and not required for LVDS DDC. - */ - if (outp->conn->info.type == DCB_CONNECTOR_eDP) { - int power = nvkm_gpio_get(gpio, 0, DCB_GPIO_PANEL_POWER, 0xff); - if (power == 0) - nvkm_gpio_set(gpio, 0, DCB_GPIO_PANEL_POWER, 0xff, 1); - - /* We delay here unconditionally, even if already powered, - * because some laptop panels having a significant resume - * delay before the panel begins responding. - * - * This is likely a bit of a hack, but no better idea for - * handling this at the moment. - */ - msleep(300); - - /* If the eDP panel can't be detected, we need to restore - * the panel power GPIO to avoid breaking another output. - */ - if (!nvkm_dp_enable(outp, true) && power == 0) - nvkm_gpio_set(gpio, 0, DCB_GPIO_PANEL_POWER, 0xff, 0); - } else { - nvkm_dp_enable(outp, true); - } - nvkm_notify_get(&outp->dp.hpd); } diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.h b/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.h index 1d86baa6a424..9a6be43916bc 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.h +++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/dp.h @@ -6,6 +6,7 @@ int nvkm_dp_new(struct nvkm_disp *, int index, struct dcb_output *, struct nvkm_outp **); void nvkm_dp_disable(struct nvkm_outp *, struct nvkm_ior *); +void nvkm_dp_enable(struct nvkm_outp *, bool auxpwr); /* DPCD Receiver Capabilities */ #define DPCD_RC00_DPCD_REV 0x00000 diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.h b/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.h index d7c989e1cd01..66def8ae3165 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.h +++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/outp.h @@ -39,7 +39,9 @@ struct nvkm_outp { struct nvkm_i2c_aux *aux; struct nvkm_notify hpd; - bool present; + bool enabled; + bool aux_pwr; + bool aux_pwr_pu; u8 lttpr[6]; u8 lttprs; u8 dpcd[16]; diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/uoutp.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/uoutp.c index 61d41b326f43..3bfc3e39778e 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/uoutp.c +++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/uoutp.c @@ -21,11 +21,25 @@ */ #define nvkm_uoutp(p) container_of((p), struct nvkm_outp, object) #include "outp.h" +#include "dp.h" #include "head.h" #include "ior.h" #include +static int +nvkm_uoutp_mthd_dp_aux_pwr(struct nvkm_outp *outp, void *argv, u32 argc) +{ + union nvif_outp_dp_aux_pwr_args *args = argv; + + if (argc != sizeof(args->v0) || args->v0.version != 0) + return -ENOSYS; + + outp->dp.enabled = !!args->v0.state; + nvkm_dp_enable(outp, outp->dp.enabled); + return 0; +} + static int nvkm_uoutp_mthd_hda_eld(struct nvkm_outp *outp, void *argv, u32 argc) { @@ -250,6 +264,7 @@ nvkm_uoutp_mthd_noacquire(struct nvkm_outp *outp, u32 mthd, void *argv, u32 argc switch (mthd) { case NVIF_OUTP_V0_LOAD_DETECT: return nvkm_uoutp_mthd_load_detect(outp, argv, argc); case NVIF_OUTP_V0_ACQUIRE : return nvkm_uoutp_mthd_acquire (outp, argv, argc); + case NVIF_OUTP_V0_DP_AUX_PWR : return nvkm_uoutp_mthd_dp_aux_pwr (outp, argv, argc); default: break; } -- cgit v1.2.3