This is required to properly handle failing dpms calls. When making a wait in i915 interruptible, I've noticed that the dpms sequence could fail with -ERESTARTSYS because it was waiting interruptibly for flips. So from now on allow drivers to fail in their connector dpms callback.
Encoder and crtc dpms callbacks are unaffected.
Signed-off-by: Maarten Lankhorst maarten.lankhorst@linux.intel.com --- drivers/gpu/drm/drm_atomic_helper.c | 25 +++++++++++++------------ drivers/gpu/drm/drm_crtc.c | 4 ++-- drivers/gpu/drm/drm_crtc_helper.c | 6 +++--- drivers/gpu/drm/nouveau/nouveau_connector.c | 4 ++-- drivers/gpu/drm/radeon/radeon_dp_mst.c | 3 ++- drivers/gpu/drm/tegra/dsi.c | 3 ++- drivers/gpu/drm/tegra/hdmi.c | 5 +++-- drivers/gpu/drm/tegra/rgb.c | 5 +++-- drivers/gpu/drm/tegra/sor.c | 3 ++- drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 3 ++- drivers/gpu/drm/vmwgfx/vmwgfx_kms.h | 2 +- include/drm/drm_atomic_helper.h | 4 ++-- include/drm/drm_crtc.h | 2 +- include/drm/drm_crtc_helper.h | 2 +- 14 files changed, 39 insertions(+), 32 deletions(-)
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index d5eba80dc39f..7eb6f751445c 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -1958,8 +1958,8 @@ EXPORT_SYMBOL(drm_atomic_helper_page_flip); * ->active state for the corresponding CRTC (if the connector is enabled) and * updates it. */ -void drm_atomic_helper_connector_dpms(struct drm_connector *connector, - int mode) +int drm_atomic_helper_connector_dpms(struct drm_connector *connector, + int mode) { struct drm_mode_config *config = &connector->dev->mode_config; struct drm_atomic_state *state; @@ -1968,6 +1968,7 @@ void drm_atomic_helper_connector_dpms(struct drm_connector *connector, struct drm_connector *tmp_connector; int ret; bool active = false; + int old_mode = connector->dpms;
if (mode != DRM_MODE_DPMS_ON) mode = DRM_MODE_DPMS_OFF; @@ -1976,18 +1977,19 @@ void drm_atomic_helper_connector_dpms(struct drm_connector *connector, crtc = connector->state->crtc;
if (!crtc) - return; + return 0;
- /* FIXME: ->dpms has no return value so can't forward the -ENOMEM. */ state = drm_atomic_state_alloc(connector->dev); if (!state) - return; + return -ENOMEM;
state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); retry: crtc_state = drm_atomic_get_crtc_state(state, crtc); - if (IS_ERR(crtc_state)) - return; + if (IS_ERR(crtc_state)) { + ret = PTR_ERR(crtc_state); + goto fail; + }
WARN_ON(!drm_modeset_is_locked(&config->connection_mutex));
@@ -2006,17 +2008,16 @@ retry: if (ret != 0) goto fail;
- /* Driver takes ownership of state on successful async commit. */ - return; + /* Driver takes ownership of state on successful commit. */ + return 0; fail: if (ret == -EDEADLK) goto backoff;
+ connector->dpms = old_mode; drm_atomic_state_free(state);
- WARN(1, "Driver bug: Changing ->active failed with ret=%i\n", ret); - - return; + return ret; backoff: drm_atomic_state_clear(state); drm_atomic_legacy_backoff(state); diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index a717d18e7a97..5c11083dd186 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -4869,9 +4869,9 @@ static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj,
/* Do DPMS ourselves */ if (property == connector->dev->mode_config.dpms_property) { - if (connector->funcs->dpms) - (*connector->funcs->dpms)(connector, (int)value); ret = 0; + if (connector->funcs->dpms) + ret = (*connector->funcs->dpms)(connector, (int)value); } else if (connector->funcs->set_property) ret = connector->funcs->set_property(connector, property, value);
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c index d3dfb0ebbeb2..ae5e52f8f5b3 100644 --- a/drivers/gpu/drm/drm_crtc_helper.c +++ b/drivers/gpu/drm/drm_crtc_helper.c @@ -763,14 +763,14 @@ static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc) * state for all encoders and crtcs in the output mesh and calls the ->dpms() * callback provided by the driver appropriately. */ -void drm_helper_connector_dpms(struct drm_connector *connector, int mode) +int drm_helper_connector_dpms(struct drm_connector *connector, int mode) { struct drm_encoder *encoder = connector->encoder; struct drm_crtc *crtc = encoder ? encoder->crtc : NULL; int old_dpms, encoder_dpms = DRM_MODE_DPMS_OFF;
if (mode == connector->dpms) - return; + return 0;
old_dpms = connector->dpms; connector->dpms = mode; @@ -802,7 +802,7 @@ void drm_helper_connector_dpms(struct drm_connector *connector, int mode) } }
- return; + return 0; } EXPORT_SYMBOL(drm_helper_connector_dpms);
diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c index 3162040bc314..1f26eba245d1 100644 --- a/drivers/gpu/drm/nouveau/nouveau_connector.c +++ b/drivers/gpu/drm/nouveau/nouveau_connector.c @@ -919,7 +919,7 @@ nouveau_connector_funcs_lvds = { .force = nouveau_connector_force };
-static void +static int nouveau_connector_dp_dpms(struct drm_connector *connector, int mode) { struct nouveau_encoder *nv_encoder = NULL; @@ -938,7 +938,7 @@ nouveau_connector_dp_dpms(struct drm_connector *connector, int mode) } }
- drm_helper_connector_dpms(connector, mode); + return drm_helper_connector_dpms(connector, mode); }
static const struct drm_connector_funcs diff --git a/drivers/gpu/drm/radeon/radeon_dp_mst.c b/drivers/gpu/drm/radeon/radeon_dp_mst.c index 257b10be5cda..983afb4b856c 100644 --- a/drivers/gpu/drm/radeon/radeon_dp_mst.c +++ b/drivers/gpu/drm/radeon/radeon_dp_mst.c @@ -246,9 +246,10 @@ radeon_dp_mst_connector_destroy(struct drm_connector *connector) kfree(radeon_connector); }
-static void radeon_connector_dpms(struct drm_connector *connector, int mode) +static int radeon_connector_dpms(struct drm_connector *connector, int mode) { DRM_DEBUG_KMS("\n"); + return 0; }
static const struct drm_connector_funcs radeon_dp_mst_connector_funcs = { diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c index ed970f622903..dc97c0b3681d 100644 --- a/drivers/gpu/drm/tegra/dsi.c +++ b/drivers/gpu/drm/tegra/dsi.c @@ -726,8 +726,9 @@ static void tegra_dsi_soft_reset(struct tegra_dsi *dsi) tegra_dsi_soft_reset(dsi->slave); }
-static void tegra_dsi_connector_dpms(struct drm_connector *connector, int mode) +static int tegra_dsi_connector_dpms(struct drm_connector *connector, int mode) { + return 0; }
static void tegra_dsi_connector_reset(struct drm_connector *connector) diff --git a/drivers/gpu/drm/tegra/hdmi.c b/drivers/gpu/drm/tegra/hdmi.c index 06ab1783bba1..fe4008a7ddba 100644 --- a/drivers/gpu/drm/tegra/hdmi.c +++ b/drivers/gpu/drm/tegra/hdmi.c @@ -772,9 +772,10 @@ static bool tegra_output_is_hdmi(struct tegra_output *output) return drm_detect_hdmi_monitor(edid); }
-static void tegra_hdmi_connector_dpms(struct drm_connector *connector, - int mode) +static int tegra_hdmi_connector_dpms(struct drm_connector *connector, + int mode) { + return 0; }
static const struct drm_connector_funcs tegra_hdmi_connector_funcs = { diff --git a/drivers/gpu/drm/tegra/rgb.c b/drivers/gpu/drm/tegra/rgb.c index 7cd833f5b5b5..9a99d213e1b1 100644 --- a/drivers/gpu/drm/tegra/rgb.c +++ b/drivers/gpu/drm/tegra/rgb.c @@ -88,9 +88,10 @@ static void tegra_dc_write_regs(struct tegra_dc *dc, tegra_dc_writel(dc, table[i].value, table[i].offset); }
-static void tegra_rgb_connector_dpms(struct drm_connector *connector, - int mode) +static int tegra_rgb_connector_dpms(struct drm_connector *connector, + int mode) { + return 0; }
static const struct drm_connector_funcs tegra_rgb_connector_funcs = { diff --git a/drivers/gpu/drm/tegra/sor.c b/drivers/gpu/drm/tegra/sor.c index 7591d8901f9a..ee8ad0d4a0f2 100644 --- a/drivers/gpu/drm/tegra/sor.c +++ b/drivers/gpu/drm/tegra/sor.c @@ -866,8 +866,9 @@ static void tegra_sor_debugfs_exit(struct tegra_sor *sor) sor->debugfs_files = NULL; }
-static void tegra_sor_connector_dpms(struct drm_connector *connector, int mode) +static int tegra_sor_connector_dpms(struct drm_connector *connector, int mode) { + return 0; }
static enum drm_connector_status diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c index 07cda8cbbddb..2adc11bc0920 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c @@ -1808,8 +1808,9 @@ void vmw_du_crtc_gamma_set(struct drm_crtc *crtc, } }
-void vmw_du_connector_dpms(struct drm_connector *connector, int mode) +int vmw_du_connector_dpms(struct drm_connector *connector, int mode) { + return 0; }
void vmw_du_connector_save(struct drm_connector *connector) diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.h b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.h index 8d038c36bd57..f1a324cfb4c3 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.h +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.h @@ -133,7 +133,7 @@ void vmw_du_crtc_gamma_set(struct drm_crtc *crtc, int vmw_du_crtc_cursor_set(struct drm_crtc *crtc, struct drm_file *file_priv, uint32_t handle, uint32_t width, uint32_t height); int vmw_du_crtc_cursor_move(struct drm_crtc *crtc, int x, int y); -void vmw_du_connector_dpms(struct drm_connector *connector, int mode); +int vmw_du_connector_dpms(struct drm_connector *connector, int mode); void vmw_du_connector_save(struct drm_connector *connector); void vmw_du_connector_restore(struct drm_connector *connector); enum drm_connector_status diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h index cc1fee8a12d0..11266d147a29 100644 --- a/include/drm/drm_atomic_helper.h +++ b/include/drm/drm_atomic_helper.h @@ -87,8 +87,8 @@ int drm_atomic_helper_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb, struct drm_pending_vblank_event *event, uint32_t flags); -void drm_atomic_helper_connector_dpms(struct drm_connector *connector, - int mode); +int drm_atomic_helper_connector_dpms(struct drm_connector *connector, + int mode);
/* default implementations for state handling */ void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc); diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 57ca8cc383a6..8159a0627b6b 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -525,7 +525,7 @@ struct drm_connector_state { * etc. */ struct drm_connector_funcs { - void (*dpms)(struct drm_connector *connector, int mode); + int (*dpms)(struct drm_connector *connector, int mode); void (*save)(struct drm_connector *connector); void (*restore)(struct drm_connector *connector); void (*reset)(struct drm_connector *connector); diff --git a/include/drm/drm_crtc_helper.h b/include/drm/drm_crtc_helper.h index c8fc187061de..4562bd12bb4a 100644 --- a/include/drm/drm_crtc_helper.h +++ b/include/drm/drm_crtc_helper.h @@ -187,7 +187,7 @@ extern bool drm_crtc_helper_set_mode(struct drm_crtc *crtc, extern bool drm_helper_crtc_in_use(struct drm_crtc *crtc); extern bool drm_helper_encoder_in_use(struct drm_encoder *encoder);
-extern void drm_helper_connector_dpms(struct drm_connector *connector, int mode); +extern int drm_helper_connector_dpms(struct drm_connector *connector, int mode);
extern void drm_helper_move_panel_connectors_to_head(struct drm_device *);