[PATCH 09/11] drm: Add drm_atomic_set_mode_for_crtc
Daniel Vetter
daniel at ffwll.ch
Fri May 22 07:26:29 PDT 2015
On Fri, May 22, 2015 at 01:34:52PM +0100, Daniel Stone wrote:
> Add a new helper, to be used later for blob property management, that
> sets the mode for a CRTC state, as well as updating the CRTC enable/active
> state at the same time.
>
> Signed-off-by: Daniel Stone <daniels at collabora.com>
> Tested-by: Sean Paul <seanpaul at chromium.org>
A few small nits below.
-Daniel
> ---
> drivers/gpu/drm/drm_atomic.c | 42 ++++++++++++++++++++++++++++++++++++
> drivers/gpu/drm/drm_atomic_helper.c | 24 ++++++---------------
> drivers/gpu/drm/drm_crtc_helper.c | 6 +++---
> drivers/gpu/drm/i915/intel_display.c | 16 +++++++++-----
> include/drm/drm_atomic.h | 6 ++++++
> 5 files changed, 68 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
> index 3134f50..67c251f 100644
> --- a/drivers/gpu/drm/drm_atomic.c
> +++ b/drivers/gpu/drm/drm_atomic.c
> @@ -290,6 +290,48 @@ drm_atomic_get_crtc_state(struct drm_atomic_state *state,
> EXPORT_SYMBOL(drm_atomic_get_crtc_state);
>
> /**
> + * drm_atomic_set_mode_for_crtc - set mode for CRTC
> + * @state: the CRTC whose incoming state to update
> + * @mode: kernel-internal mode to use for the CRTC, or NULL to disable
> + *
> + * Set a mode (originating from the kernel) on the desired CRTC state, and
> + * update the CRTC state's enable and mode_changed parameters as necessary.
> + * If disabling, it will also set active to false.
Kerneldoc for return values is missing. Fairly important since many atomic
functions can return -EDEADLK, but this one doesn (even not when all the
patches are applied).
> + */
> +int drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state,
> + struct drm_display_mode *mode)
> +{
> + /* Early return for no change. */
> + if (!mode && !state->enable)
> + return 0;
> + if (mode && state->enable &&
> + memcmp(&state->mode, mode, sizeof(*mode)) == 0)
> + return 0;
> +
> + state->mode_changed = true;
Layering violation: ->mode_changed is purely something for the benefit of
drivers/helpers and not something the core manadates. Hence this should
get removed imo.
> +
> + if (mode) {
> + drm_mode_copy(&state->mode, mode);
> + state->enable = true;
> + } else {
> + memset(&state->mode, 0, sizeof(state->mode));
> + state->enable = false;
> + state->active = false;
> + }
> +
> + if (state->enable)
> + DRM_DEBUG_ATOMIC("Set [MODE:%s] for CRTC state %p\n",
> + mode->name, state);
> + else
> + DRM_DEBUG_ATOMIC("Set [NOMODE] for CRTC state %p\n",
> + state);
> +
> + return 0;
> +}
> +EXPORT_SYMBOL(drm_atomic_set_mode_for_crtc);
> +
> +
> +/**
> * drm_atomic_crtc_set_property - set property on CRTC
> * @crtc: the drm CRTC to set a property on
> * @state: the state object to update with the new property value
> diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
> index a64bacd..70ce243 100644
> --- a/drivers/gpu/drm/drm_atomic_helper.c
> +++ b/drivers/gpu/drm/drm_atomic_helper.c
> @@ -369,20 +369,6 @@ drm_atomic_helper_check_modeset(struct drm_device *dev,
> struct drm_connector_state *connector_state;
> int i, ret;
>
> - for_each_crtc_in_state(state, crtc, crtc_state, i) {
> - if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) {
> - DRM_DEBUG_ATOMIC("[CRTC:%d] mode changed\n",
> - crtc->base.id);
> - crtc_state->mode_changed = true;
> - }
> -
> - if (crtc->state->enable != crtc_state->enable) {
> - DRM_DEBUG_ATOMIC("[CRTC:%d] enable changed\n",
> - crtc->base.id);
> - crtc_state->mode_changed = true;
> - }
> - }
Ofc then this hunk here needs to stay.
> -
> for_each_connector_in_state(state, connector, connector_state, i) {
> /*
> * This only sets crtc->mode_changed for routing changes,
> @@ -1607,8 +1593,9 @@ retry:
> WARN_ON(set->fb);
> WARN_ON(set->num_connectors);
>
> - crtc_state->enable = false;
> - crtc_state->active = false;
> + ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL);
> + if (ret != 0)
> + goto fail;
>
> ret = drm_atomic_set_crtc_for_plane(primary_state, NULL);
> if (ret != 0)
> @@ -1622,9 +1609,10 @@ retry:
> WARN_ON(!set->fb);
> WARN_ON(!set->num_connectors);
>
> - crtc_state->enable = true;
> + ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode);
> + if (ret != 0)
> + goto fail;
> crtc_state->active = true;
> - drm_mode_copy(&crtc_state->mode, set->mode);
>
> ret = drm_atomic_set_crtc_for_plane(primary_state, crtc);
> if (ret != 0)
> diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
> index 9297a61..cc77a4f 100644
> --- a/drivers/gpu/drm/drm_crtc_helper.c
> +++ b/drivers/gpu/drm/drm_crtc_helper.c
> @@ -937,10 +937,10 @@ int drm_helper_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mod
> crtc_state->crtc = crtc;
> }
>
> - crtc_state->enable = true;
> crtc_state->planes_changed = true;
> - crtc_state->mode_changed = true;
> - drm_mode_copy(&crtc_state->mode, mode);
> + ret = drm_atomic_set_mode_for_crtc(crtc_state, mode);
> + if (ret)
> + goto out;
> drm_mode_copy(&crtc_state->adjusted_mode, adjusted_mode);
>
> if (crtc_funcs->atomic_check) {
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 240092a..7e31972 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -9896,7 +9896,9 @@ retry:
> if (ret)
> goto fail;
>
> - drm_mode_copy(&crtc_state->base.mode, mode);
> + ret = drm_atomic_set_mode_for_crtc(&crtc_state->base, mode);
> + if (ret)
> + goto fail;
>
> if (intel_set_mode(crtc, state)) {
> DRM_DEBUG_KMS("failed to set mode on load-detect pipe\n");
> @@ -12494,8 +12496,11 @@ void intel_crtc_restore_mode(struct drm_crtc *crtc)
>
> crtc_state->base.enable = intel_crtc->new_enabled;
>
> - if (&intel_crtc->base == crtc)
> - drm_mode_copy(&crtc_state->base.mode, &crtc->mode);
> + if (&intel_crtc->base == crtc) {
> + ret = drm_atomic_set_mode_for_crtc(&crtc_state->base,
> + &crtc->mode);
> + WARN_ON(ret);
> + }
> }
>
> intel_modeset_setup_plane_state(state, crtc, &crtc->mode,
> @@ -12633,8 +12638,9 @@ intel_modeset_stage_output_state(struct drm_device *dev,
> if (IS_ERR(crtc_state))
> return PTR_ERR(crtc_state);
>
> - if (set->mode)
> - drm_mode_copy(&crtc_state->mode, set->mode);
> + ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode);
> + if (ret)
> + return ret;
>
> if (set->num_connectors)
> crtc_state->active = true;
> diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h
> index e89db0c..55f4604 100644
> --- a/include/drm/drm_atomic.h
> +++ b/include/drm/drm_atomic.h
> @@ -110,6 +110,12 @@ drm_atomic_get_existing_connector_state(struct drm_atomic_state *state,
> }
>
> int __must_check
> +drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state,
> + struct drm_display_mode *mode);
> +int __must_check
> +drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state,
> + struct drm_property_blob *blob);
> +int __must_check
> drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state,
> struct drm_crtc *crtc);
> void drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state,
> --
> 2.4.1
>
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--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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