From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Add a convenience macro for iterating connector->encoder_ids[].
Isolates the users from the implementation details.
Also use ARRAY_SIZE() when populating the array to avoid spreading
knowledge about the array size all over.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_connector.c | 22 ++++++++++------------
drivers/gpu/drm/drm_fb_helper.c | 6 +++---
drivers/gpu/drm/drm_probe_helper.c | 9 +++++----
include/drm/drm_connector.h | 11 +++++++++++
4 files changed, 29 insertions(+), 19 deletions(-)
diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 2f9ebddd178e..c43646cb8145 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;
@@ -1693,6 +1693,7 @@ int drm_mode_getconnector(struct drm_device *dev, void *data,
int encoders_count = 0;
int ret = 0;
int copied = 0;
+ u32 encoder_id;
int i;
struct drm_mode_modeinfo u_mode;
struct drm_mode_modeinfo __user *mode_ptr;
@@ -1708,22 +1709,19 @@ 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_for_each_connector_encoder_ids(connector, encoder_id, 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_for_each_connector_encoder_ids(connector, encoder_id, i) {
+ if (put_user(encoder_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 61c39cd75a27..e086b08748f4 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -2326,12 +2326,12 @@ static bool drm_target_preferred(struct drm_fb_helper *fb_helper,
static bool connector_crtc_ok(struct drm_connector *connector,
struct drm_crtc *crtc)
{
+ u32 encoder_id;
int i;
- for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
+ drm_for_each_connector_encoder_ids(connector, encoder_id, i) {
struct drm_encoder *encoder =
- drm_encoder_find(connector->dev, NULL,
- connector->encoder_ids[i]);
+ drm_encoder_find(connector->dev, NULL, encoder_id);
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..0239f76c52fb 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;
+ u32 encoder_id;
+ int i;
/* Step 1: Validate against connector */
ret = drm_connector_mode_valid(connector, mode);
@@ -98,8 +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_for_each_connector_encoder_ids(connector, encoder_id, i) {
+ struct drm_encoder *encoder =
+ drm_encoder_find(dev, NULL, encoder_id);
struct drm_crtc *crtc;
if (!encoder)
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index 14ab58ade87f..4a0363f7dd8c 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -1193,4 +1193,15 @@ 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_for_each_connector_encoder_ids - iterate connector encoder_ids[]
+ * @connector: &struct drm_connector pointer used as cursor
+ * @encoder_id: the encoder ID
+ * @__i: int iteration cursor, for macro-internal use
+ */
+#define drm_for_each_connector_encoder_ids(connector, encoder_id, __i) \
+ for ((__i) = 0; (__i) < ARRAY_SIZE((connector)->encoder_ids) && \
+ (connector)->encoder_ids[(__i)] != 0; (__i)++) \
+ for_each_if((encoder_id) = (connector)->encoder_ids[(__i)])
+
#endif
--
2.16.4
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