[PATCH v2 3/9] drm: Add drm_connector_for_each_possible_encoder()
Daniel Vetter
daniel at ffwll.ch
Thu Jun 28 16:56:40 UTC 2018
On Thu, Jun 28, 2018 at 04:13:09PM +0300, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
> Add a convenience macro for iterating connector->encoder_ids[].
> Isolates the users from the implementation details.
>
> Note that we don't seem to pass the file_priv down to drm_encoder_find()
> because encoders apparently don't get leased. No idea why
> drm_encoder_finc() even takes the file_priv actually.
>
> Also use ARRAY_SIZE() when populating the array to avoid spreading
> knowledge about the array size all over.
>
> v2: Hide the drm_encoder_find() in the macro, and
> rename the macro appropriately (Daniel)
>
> Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
> Reviewed-by: Alex Deucher <alexander.deucher at amd.com> #v1
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> ---
> drivers/gpu/drm/drm_connector.c | 21 +++++++++------------
> drivers/gpu/drm/drm_fb_helper.c | 11 ++---------
> drivers/gpu/drm/drm_probe_helper.c | 10 +++-------
> include/drm/drm_connector.h | 13 +++++++++++++
> 4 files changed, 27 insertions(+), 28 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
> index 2f9ebddd178e..186febcf4e55 100644
> --- a/drivers/gpu/drm/drm_connector.c
> +++ b/drivers/gpu/drm/drm_connector.c
> @@ -321,7 +321,7 @@ int drm_mode_connector_attach_encoder(struct drm_connector *connector,
> if (WARN_ON(connector->encoder))
> return -EINVAL;
>
> - for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
> + for (i = 0; i < ARRAY_SIZE(connector->encoder_ids); i++) {
> if (connector->encoder_ids[i] == 0) {
> connector->encoder_ids[i] = encoder->base.id;
> return 0;
> @@ -1708,22 +1708,19 @@ int drm_mode_getconnector(struct drm_device *dev, void *data,
> if (!connector)
> return -ENOENT;
>
> - for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++)
> - if (connector->encoder_ids[i] != 0)
> - encoders_count++;
> + drm_connector_for_each_possible_encoder(connector, encoder, i)
> + encoders_count++;
>
> if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
> copied = 0;
> encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
> - for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
> - if (connector->encoder_ids[i] != 0) {
> - if (put_user(connector->encoder_ids[i],
> - encoder_ptr + copied)) {
> - ret = -EFAULT;
> - goto out;
> - }
> - copied++;
> +
> + drm_connector_for_each_possible_encoder(connector, encoder, i) {
> + if (put_user(encoder->base.id, encoder_ptr + copied)) {
> + ret = -EFAULT;
> + goto out;
> }
> + copied++;
> }
> }
> out_resp->count_encoders = encoders_count;
> diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
> index b37f06317d51..d697c1c4a067 100644
> --- a/drivers/gpu/drm/drm_fb_helper.c
> +++ b/drivers/gpu/drm/drm_fb_helper.c
> @@ -2326,17 +2326,10 @@ static bool drm_target_preferred(struct drm_fb_helper *fb_helper,
> static bool connector_has_possible_crtc(struct drm_connector *connector,
> struct drm_crtc *crtc)
> {
> + struct drm_encoder *encoder;
> int i;
>
> - for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
> - struct drm_encoder *encoder;
> -
> - if (connector->encoder_ids[i] == 0)
> - break;
> -
> - encoder = drm_encoder_find(connector->dev, NULL,
> - connector->encoder_ids[i]);
> -
> + drm_connector_for_each_possible_encoder(connector, encoder, i) {
> if (encoder->possible_crtcs & drm_crtc_mask(crtc))
> return true;
> }
> diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c
> index 527743394150..1a901fe9e23e 100644
> --- a/drivers/gpu/drm/drm_probe_helper.c
> +++ b/drivers/gpu/drm/drm_probe_helper.c
> @@ -88,9 +88,9 @@ drm_mode_validate_pipeline(struct drm_display_mode *mode,
> struct drm_connector *connector)
> {
> struct drm_device *dev = connector->dev;
> - uint32_t *ids = connector->encoder_ids;
> enum drm_mode_status ret = MODE_OK;
> - unsigned int i;
> + struct drm_encoder *encoder;
> + int i;
>
> /* Step 1: Validate against connector */
> ret = drm_connector_mode_valid(connector, mode);
> @@ -98,13 +98,9 @@ drm_mode_validate_pipeline(struct drm_display_mode *mode,
> return ret;
>
> /* Step 2: Validate against encoders and crtcs */
> - for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
> - struct drm_encoder *encoder = drm_encoder_find(dev, NULL, ids[i]);
> + drm_connector_for_each_possible_encoder(connector, encoder, i) {
> struct drm_crtc *crtc;
>
> - if (!encoder)
> - continue;
> -
> ret = drm_encoder_mode_valid(encoder, mode);
> if (ret != MODE_OK) {
> /* No point in continuing for crtc check as this encoder
> diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
> index 14ab58ade87f..8de3a3aa516a 100644
> --- a/include/drm/drm_connector.h
> +++ b/include/drm/drm_connector.h
> @@ -1193,4 +1193,17 @@ void drm_connector_list_iter_end(struct drm_connector_list_iter *iter);
> #define drm_for_each_connector_iter(connector, iter) \
> while ((connector = drm_connector_list_iter_next(iter)))
>
> +/**
> + * drm_connector_for_each_possible_encoder - iterate connector's possible encoders
> + * @connector: &struct drm_connector pointer used as cursor
> + * @encoder: the encoder
Isn't this the other way round? encoder is the cursor, connector is _the_
connector?
Otherwise Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch> and ack from
me on the entire series. Much prettier!
-Daniel
> + * @__i: int iteration cursor, for macro-internal use
> + */
> +#define drm_connector_for_each_possible_encoder(connector, encoder, __i) \
> + for ((__i) = 0; (__i) < ARRAY_SIZE((connector)->encoder_ids) && \
> + (connector)->encoder_ids[(__i)] != 0; (__i)++) \
> + for_each_if((encoder) = \
> + drm_encoder_find((connector)->dev, NULL, \
> + (connector)->encoder_ids[(__i)])) \
> +
> #endif
> --
> 2.16.4
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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