From 9bdbd0b911086d03a27e1fe9531b41f5411ccfac Mon Sep 17 00:00:00 2001 From: Ander Conselvan de Oliveira Date: Fri, 10 Apr 2015 10:59:10 +0300 Subject: [PATCH] drm/i915: Allocate connector state together with the connectors Connector states were being allocated in intel_setup_outputs() in loop over all connectors. That meant hot-added connectors would have a NULL state. Since the change to use a struct drm_atomic_state for the legacy modeset, connector states are necessary for the i915 driver to function properly, so that would lead to oopses. v2: Fix test for intel_connector_init() success in lvds and sdvo (PRTS) Signed-off-by: Ander Conselvan de Oliveira Reported-and-tested-by: Nicolas Kalkhof Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_crt.c | 2 +- drivers/gpu/drm/i915/intel_ddi.c | 4 +- drivers/gpu/drm/i915/intel_display.c | 62 +++++++++++++--------------- drivers/gpu/drm/i915/intel_dp.c | 2 +- drivers/gpu/drm/i915/intel_dp_mst.c | 2 +- drivers/gpu/drm/i915/intel_drv.h | 2 + drivers/gpu/drm/i915/intel_dsi.c | 2 +- drivers/gpu/drm/i915/intel_dvo.c | 2 +- drivers/gpu/drm/i915/intel_hdmi.c | 2 +- drivers/gpu/drm/i915/intel_lvds.c | 6 +++ drivers/gpu/drm/i915/intel_sdvo.c | 22 ++++++++-- drivers/gpu/drm/i915/intel_tv.c | 2 +- 12 files changed, 64 insertions(+), 46 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c index fa5699c8452b..93bb5159d093 100644 --- a/drivers/gpu/drm/i915/intel_crt.c +++ b/drivers/gpu/drm/i915/intel_crt.c @@ -851,7 +851,7 @@ void intel_crt_init(struct drm_device *dev) if (!crt) return; - intel_connector = kzalloc(sizeof(*intel_connector), GFP_KERNEL); + intel_connector = intel_connector_alloc(); if (!intel_connector) { kfree(crt); return; diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index 8c692d8a3ef6..486f6fa68db1 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -2101,7 +2101,7 @@ intel_ddi_init_dp_connector(struct intel_digital_port *intel_dig_port) struct intel_connector *connector; enum port port = intel_dig_port->port; - connector = kzalloc(sizeof(*connector), GFP_KERNEL); + connector = intel_connector_alloc(); if (!connector) return NULL; @@ -2120,7 +2120,7 @@ intel_ddi_init_hdmi_connector(struct intel_digital_port *intel_dig_port) struct intel_connector *connector; enum port port = intel_dig_port->port; - connector = kzalloc(sizeof(*connector), GFP_KERNEL); + connector = intel_connector_alloc(); if (!connector) return NULL; diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index a0be6ab7ba7b..4a074aa685e6 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -5685,6 +5685,34 @@ static void intel_connector_check_state(struct intel_connector *connector) } } +int intel_connector_init(struct intel_connector *connector) +{ + struct drm_connector_state *connector_state; + + connector_state = kzalloc(sizeof *connector_state, GFP_KERNEL); + if (!connector_state) + return -ENOMEM; + + connector->base.state = connector_state; + return 0; +} + +struct intel_connector *intel_connector_alloc(void) +{ + struct intel_connector *connector; + + connector = kzalloc(sizeof *connector, GFP_KERNEL); + if (!connector) + return NULL; + + if (intel_connector_init(connector) < 0) { + kfree(connector); + return NULL; + } + + return connector; +} + /* Even simpler default implementation, if there's really no special case to * consider. */ void intel_connector_dpms(struct drm_connector *connector, int mode) @@ -13187,7 +13215,6 @@ static void intel_setup_outputs(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct intel_encoder *encoder; - struct drm_connector *connector; bool dpd_is_edp = false; intel_lvds_init(dev); @@ -13323,39 +13350,6 @@ static void intel_setup_outputs(struct drm_device *dev) if (SUPPORTS_TV(dev)) intel_tv_init(dev); - /* - * FIXME: We don't have full atomic support yet, but we want to be - * able to enable/test plane updates via the atomic interface in the - * meantime. However as soon as we flip DRIVER_ATOMIC on, the DRM core - * will take some atomic codepaths to lookup properties during - * drmModeGetConnector() that unconditionally dereference - * connector->state. - * - * We create a dummy connector state here for each connector to ensure - * the DRM core doesn't try to dereference a NULL connector->state. - * The actual connector properties will never be updated or contain - * useful information, but since we're doing this specifically for - * testing/debug of the plane operations (and only when a specific - * kernel module option is given), that shouldn't really matter. - * - * We are also relying on these states to convert the legacy mode set - * to use a drm_atomic_state struct. The states are kept consistent - * with actual state, so that it is safe to rely on that instead of - * the staged config. - * - * Once atomic support for crtc's + connectors lands, this loop should - * be removed since we'll be setting up real connector state, which - * will contain Intel-specific properties. - */ - list_for_each_entry(connector, - &dev->mode_config.connector_list, - head) { - if (!WARN_ON(connector->state)) { - connector->state = kzalloc(sizeof(*connector->state), - GFP_KERNEL); - } - } - intel_psr_init(dev); for_each_intel_encoder(dev, encoder) { diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 1b87969536ff..589cd92d5c30 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -5602,7 +5602,7 @@ intel_dp_init(struct drm_device *dev, int output_reg, enum port port) if (!intel_dig_port) return; - intel_connector = kzalloc(sizeof(*intel_connector), GFP_KERNEL); + intel_connector = intel_connector_alloc(); if (!intel_connector) { kfree(intel_dig_port); return; diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c index adcc5e641347..73350894e2c9 100644 --- a/drivers/gpu/drm/i915/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/intel_dp_mst.c @@ -415,7 +415,7 @@ static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topolo struct drm_connector *connector; int i; - intel_connector = kzalloc(sizeof(*intel_connector), GFP_KERNEL); + intel_connector = intel_connector_alloc(); if (!intel_connector) return NULL; diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 7a0aa2431bc0..638024fcc8ff 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -928,6 +928,8 @@ void intel_crtc_restore_mode(struct drm_crtc *crtc); void intel_crtc_control(struct drm_crtc *crtc, bool enable); void intel_crtc_update_dpms(struct drm_crtc *crtc); void intel_encoder_destroy(struct drm_encoder *encoder); +int intel_connector_init(struct intel_connector *); +struct intel_connector *intel_connector_alloc(void); void intel_connector_dpms(struct drm_connector *, int mode); bool intel_connector_get_hw_state(struct intel_connector *connector); void intel_modeset_check_state(struct drm_device *dev); diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c index 572251e9810b..51966426addf 100644 --- a/drivers/gpu/drm/i915/intel_dsi.c +++ b/drivers/gpu/drm/i915/intel_dsi.c @@ -1007,7 +1007,7 @@ void intel_dsi_init(struct drm_device *dev) if (!intel_dsi) return; - intel_connector = kzalloc(sizeof(*intel_connector), GFP_KERNEL); + intel_connector = intel_connector_alloc(); if (!intel_connector) { kfree(intel_dsi); return; diff --git a/drivers/gpu/drm/i915/intel_dvo.c b/drivers/gpu/drm/i915/intel_dvo.c index 9a27ec7100ef..7c9f85285aea 100644 --- a/drivers/gpu/drm/i915/intel_dvo.c +++ b/drivers/gpu/drm/i915/intel_dvo.c @@ -469,7 +469,7 @@ void intel_dvo_init(struct drm_device *dev) if (!intel_dvo) return; - intel_connector = kzalloc(sizeof(*intel_connector), GFP_KERNEL); + intel_connector = intel_connector_alloc(); if (!intel_connector) { kfree(intel_dvo); return; diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c index 26222e6c1ff3..02252d9a0cc3 100644 --- a/drivers/gpu/drm/i915/intel_hdmi.c +++ b/drivers/gpu/drm/i915/intel_hdmi.c @@ -1755,7 +1755,7 @@ void intel_hdmi_init(struct drm_device *dev, int hdmi_reg, enum port port) if (!intel_dig_port) return; - intel_connector = kzalloc(sizeof(*intel_connector), GFP_KERNEL); + intel_connector = intel_connector_alloc(); if (!intel_connector) { kfree(intel_dig_port); return; diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c index 314a5d56ace2..9a9df0fa67f9 100644 --- a/drivers/gpu/drm/i915/intel_lvds.c +++ b/drivers/gpu/drm/i915/intel_lvds.c @@ -946,6 +946,12 @@ void intel_lvds_init(struct drm_device *dev) return; } + if (intel_connector_init(&lvds_connector->base) < 0) { + kfree(lvds_connector); + kfree(lvds_encoder); + return; + } + lvds_encoder->attached_connector = lvds_connector; intel_encoder = &lvds_encoder->base; diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c index b121796c86aa..10cd33252838 100644 --- a/drivers/gpu/drm/i915/intel_sdvo.c +++ b/drivers/gpu/drm/i915/intel_sdvo.c @@ -2427,6 +2427,22 @@ intel_sdvo_add_hdmi_properties(struct intel_sdvo *intel_sdvo, } } +static struct intel_sdvo_connector *intel_sdvo_connector_alloc(void) +{ + struct intel_sdvo_connector *sdvo_connector; + + sdvo_connector = kzalloc(sizeof(*sdvo_connector), GFP_KERNEL); + if (!sdvo_connector) + return NULL; + + if (intel_connector_init(&sdvo_connector->base) < 0) { + kfree(sdvo_connector); + return NULL; + } + + return sdvo_connector; +} + static bool intel_sdvo_dvi_init(struct intel_sdvo *intel_sdvo, int device) { @@ -2438,7 +2454,7 @@ intel_sdvo_dvi_init(struct intel_sdvo *intel_sdvo, int device) DRM_DEBUG_KMS("initialising DVI device %d\n", device); - intel_sdvo_connector = kzalloc(sizeof(*intel_sdvo_connector), GFP_KERNEL); + intel_sdvo_connector = intel_sdvo_connector_alloc(); if (!intel_sdvo_connector) return false; @@ -2492,7 +2508,7 @@ intel_sdvo_tv_init(struct intel_sdvo *intel_sdvo, int type) DRM_DEBUG_KMS("initialising TV type %d\n", type); - intel_sdvo_connector = kzalloc(sizeof(*intel_sdvo_connector), GFP_KERNEL); + intel_sdvo_connector = intel_sdvo_connector_alloc(); if (!intel_sdvo_connector) return false; @@ -2571,7 +2587,7 @@ intel_sdvo_lvds_init(struct intel_sdvo *intel_sdvo, int device) DRM_DEBUG_KMS("initialising LVDS device %d\n", device); - intel_sdvo_connector = kzalloc(sizeof(*intel_sdvo_connector), GFP_KERNEL); + intel_sdvo_connector = intel_sdvo_connector_alloc(); if (!intel_sdvo_connector) return false; diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c index bc1d9d740904..8b9d325bda3c 100644 --- a/drivers/gpu/drm/i915/intel_tv.c +++ b/drivers/gpu/drm/i915/intel_tv.c @@ -1621,7 +1621,7 @@ intel_tv_init(struct drm_device *dev) return; } - intel_connector = kzalloc(sizeof(*intel_connector), GFP_KERNEL); + intel_connector = intel_connector_alloc(); if (!intel_connector) { kfree(intel_tv); return; -- 2.20.1