diff options
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_aux.c | 21 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_aux.h | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_catalog.c | 13 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_catalog.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_display.c | 2 |
5 files changed, 37 insertions, 3 deletions
diff --git a/drivers/gpu/drm/msm/dp/dp_aux.c b/drivers/gpu/drm/msm/dp/dp_aux.c index 6d36f63c3338..d030a93a08c3 100644 --- a/drivers/gpu/drm/msm/dp/dp_aux.c +++ b/drivers/gpu/drm/msm/dp/dp_aux.c @@ -34,6 +34,7 @@ struct dp_aux_private { bool no_send_addr; bool no_send_stop; bool initted; + bool is_edp; u32 offset; u32 segment; @@ -337,6 +338,22 @@ static ssize_t dp_aux_transfer(struct drm_dp_aux *dp_aux, goto exit; } + /* + * For eDP it's important to give a reasonably long wait here for HPD + * to be asserted. This is because the panel driver may have _just_ + * turned on the panel and then tried to do an AUX transfer. The panel + * driver has no way of knowing when the panel is ready, so it's up + * to us to wait. For DP we never get into this situation so let's + * avoid ever doing the extra long wait for DP. + */ + if (aux->is_edp) { + ret = dp_catalog_aux_wait_for_hpd_connect_state(aux->catalog); + if (ret) { + DRM_DEBUG_DP("Panel not ready for aux transactions\n"); + goto exit; + } + } + dp_aux_update_offset_and_segment(aux, msg); dp_aux_transfer_helper(aux, msg, true); @@ -491,7 +508,8 @@ void dp_aux_unregister(struct drm_dp_aux *dp_aux) drm_dp_aux_unregister(dp_aux); } -struct drm_dp_aux *dp_aux_get(struct device *dev, struct dp_catalog *catalog) +struct drm_dp_aux *dp_aux_get(struct device *dev, struct dp_catalog *catalog, + bool is_edp) { struct dp_aux_private *aux; @@ -506,6 +524,7 @@ struct drm_dp_aux *dp_aux_get(struct device *dev, struct dp_catalog *catalog) init_completion(&aux->comp); aux->cmd_busy = false; + aux->is_edp = is_edp; mutex_init(&aux->mutex); aux->dev = dev; diff --git a/drivers/gpu/drm/msm/dp/dp_aux.h b/drivers/gpu/drm/msm/dp/dp_aux.h index 82afc8d5210f..5a50c089df78 100644 --- a/drivers/gpu/drm/msm/dp/dp_aux.h +++ b/drivers/gpu/drm/msm/dp/dp_aux.h @@ -16,7 +16,8 @@ void dp_aux_init(struct drm_dp_aux *dp_aux); void dp_aux_deinit(struct drm_dp_aux *dp_aux); void dp_aux_reconfig(struct drm_dp_aux *dp_aux); -struct drm_dp_aux *dp_aux_get(struct device *dev, struct dp_catalog *catalog); +struct drm_dp_aux *dp_aux_get(struct device *dev, struct dp_catalog *catalog, + bool is_edp); void dp_aux_put(struct drm_dp_aux *aux); #endif /*__DP_AUX_H_*/ diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c index 5869901d8659..aff1e504f66f 100644 --- a/drivers/gpu/drm/msm/dp/dp_catalog.c +++ b/drivers/gpu/drm/msm/dp/dp_catalog.c @@ -245,6 +245,19 @@ void dp_catalog_aux_update_cfg(struct dp_catalog *dp_catalog) phy_calibrate(phy); } +int dp_catalog_aux_wait_for_hpd_connect_state(struct dp_catalog *dp_catalog) +{ + u32 state; + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + /* poll for hpd connected status every 2ms and timeout after 500ms */ + return readl_poll_timeout(catalog->io->dp_controller.aux.base + + REG_DP_DP_HPD_INT_STATUS, + state, state & DP_DP_HPD_STATE_STATUS_CONNECTED, + 2000, 500000); +} + static void dump_regs(void __iomem *base, int len) { int i; diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h index 1656f4daab4d..1f717f45c115 100644 --- a/drivers/gpu/drm/msm/dp/dp_catalog.h +++ b/drivers/gpu/drm/msm/dp/dp_catalog.h @@ -85,6 +85,7 @@ int dp_catalog_aux_clear_hw_interrupts(struct dp_catalog *dp_catalog); void dp_catalog_aux_reset(struct dp_catalog *dp_catalog); void dp_catalog_aux_enable(struct dp_catalog *dp_catalog, bool enable); void dp_catalog_aux_update_cfg(struct dp_catalog *dp_catalog); +int dp_catalog_aux_wait_for_hpd_connect_state(struct dp_catalog *dp_catalog); u32 dp_catalog_aux_get_irq(struct dp_catalog *dp_catalog); /* DP Controller APIs */ diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index d346107e3545..0e52c0ab2174 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -783,7 +783,7 @@ static int dp_init_sub_modules(struct dp_display_private *dp) goto error; } - dp->aux = dp_aux_get(dev, dp->catalog); + dp->aux = dp_aux_get(dev, dp->catalog, dp->dp_display.is_edp); if (IS_ERR(dp->aux)) { rc = PTR_ERR(dp->aux); DRM_ERROR("failed to initialize aux, rc = %d\n", rc); |