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drm: Use mode_valid() in atomic modeset

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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 <joabreu@synopsys.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Cc: Carlos Palminha <palminha@synopsys.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Dave Airlie <airlied@linux.ie>
Cc: Andrzej Hajda <a.hajda@samsung.com>
Cc: Archit Taneja <architt@codeaurora.org>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

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 <joabreu@synopsys.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/a457d6a69ad07b3936304653c919068c430c0857.1495720737.git.joabreu@synopsys.com
This commit is contained in:
Jose Abreu 2017-05-25 15:19:16 +01:00 committed by Daniel Vetter
parent 97f973d652
commit faf94a0883
1 changed files with 73 additions and 3 deletions
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76
drivers/gpu/drm/drm_atomic_helper.c
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@ -32,6 +32,7 @@
#include <drm/drm_atomic_helper.h>
#include <linux/dma-fence.h>
#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);