From: Jose Abreu Date: Thu, 25 May 2017 14:19:16 +0000 (+0100) Subject: drm: Use mode_valid() in atomic modeset X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=faf94a0883cedce892ef10a258c9388929462525;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git drm: Use mode_valid() in atomic modeset This patches makes use of the new mode_valid() callbacks introduced previously to validate the full video pipeline when modesetting. This calls the connector->mode_valid(), encoder->mode_valid(), bridge->mode_valid() and crtc->mode_valid() so that we can make sure that the mode will be accepted in every components. Signed-off-by: Jose Abreu Reviewed-by: Daniel Vetter Reviewed-by: Andrzej Hajda Cc: Carlos Palminha Cc: Ville Syrjälä Cc: Daniel Vetter Cc: Dave Airlie Cc: Andrzej Hajda Cc: Archit Taneja Cc: Laurent Pinchart Changes v1->v2: - Removed call to connector->mode_valid (Ville, Daniel) - Changed function name (Ville) - Use for_each_new_connector_in_state (Ville) - Do not validate if connector and mode didn't change (Ville) - Use new helpers to call mode_valid Signed-off-by: Jose Abreu Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/a457d6a69ad07b3936304653c919068c430c0857.1495720737.git.joabreu@synopsys.com --- diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index 636e561486a8..93b0221d5d0f 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -32,6 +32,7 @@ #include #include +#include "drm_crtc_helper_internal.h" #include "drm_crtc_internal.h" /** @@ -452,6 +453,69 @@ mode_fixup(struct drm_atomic_state *state) return 0; } +static enum drm_mode_status mode_valid_path(struct drm_connector *connector, + struct drm_encoder *encoder, + struct drm_crtc *crtc, + struct drm_display_mode *mode) +{ + enum drm_mode_status ret; + + ret = drm_encoder_mode_valid(encoder, mode); + if (ret != MODE_OK) { + DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] mode_valid() failed\n", + encoder->base.id, encoder->name); + return ret; + } + + ret = drm_bridge_mode_valid(encoder->bridge, mode); + if (ret != MODE_OK) { + DRM_DEBUG_ATOMIC("[BRIDGE] mode_valid() failed\n"); + return ret; + } + + ret = drm_crtc_mode_valid(crtc, mode); + if (ret != MODE_OK) { + DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode_valid() failed\n", + crtc->base.id, crtc->name); + return ret; + } + + return ret; +} + +static int +mode_valid(struct drm_atomic_state *state) +{ + struct drm_connector_state *conn_state; + struct drm_connector *connector; + int i; + + for_each_new_connector_in_state(state, connector, conn_state, i) { + struct drm_encoder *encoder = conn_state->best_encoder; + struct drm_crtc *crtc = conn_state->crtc; + struct drm_crtc_state *crtc_state; + enum drm_mode_status mode_status; + struct drm_display_mode *mode; + + if (!crtc || !encoder) + continue; + + crtc_state = drm_atomic_get_new_crtc_state(state, crtc); + if (!crtc_state) + continue; + if (!crtc_state->mode_changed && !crtc_state->connectors_changed) + continue; + + mode = &crtc_state->mode; + + mode_status = mode_valid_path(connector, encoder, crtc, mode); + if (mode_status != MODE_OK) + return -EINVAL; + } + + return 0; +} + /** * drm_atomic_helper_check_modeset - validate state object for modeset changes * @dev: DRM device @@ -466,13 +530,15 @@ mode_fixup(struct drm_atomic_state *state) * 2. &drm_connector_helper_funcs.atomic_check to validate the connector state. * 3. If it's determined a modeset is needed then all connectors on the affected crtc * crtc are added and &drm_connector_helper_funcs.atomic_check is run on them. - * 4. &drm_bridge_funcs.mode_fixup is called on all encoder bridges. - * 5. &drm_encoder_helper_funcs.atomic_check is called to validate any encoder state. + * 4. &drm_encoder_helper_funcs.mode_valid, &drm_bridge_funcs.mode_valid and + * &drm_crtc_helper_funcs.mode_valid are called on the affected components. + * 5. &drm_bridge_funcs.mode_fixup is called on all encoder bridges. + * 6. &drm_encoder_helper_funcs.atomic_check is called to validate any encoder state. * This function is only called when the encoder will be part of a configured crtc, * it must not be used for implementing connector property validation. * If this function is NULL, &drm_atomic_encoder_helper_funcs.mode_fixup is called * instead. - * 6. &drm_crtc_helper_funcs.mode_fixup is called last, to fix up the mode with crtc constraints. + * 7. &drm_crtc_helper_funcs.mode_fixup is called last, to fix up the mode with crtc constraints. * * &drm_crtc_state.mode_changed is set when the input mode is changed. * &drm_crtc_state.connectors_changed is set when a connector is added or @@ -617,6 +683,10 @@ drm_atomic_helper_check_modeset(struct drm_device *dev, return ret; } + ret = mode_valid(state); + if (ret) + return ret; + return mode_fixup(state); } EXPORT_SYMBOL(drm_atomic_helper_check_modeset);