And use it in drivers accessing the bridge->next field directly. This is part of our attempt to make the bridge chain a double-linked list based on the generic list helpers.
Signed-off-by: Boris Brezillon boris.brezillon@collabora.com Reviewed-by: Neil Armstrong narmstrong@baylibre.com Reviewed-by: Laurent Pinchart laurent.pinchart@ideasonboard.com --- Changes in v4: * Rename the helper * Add R-bs
Changes in v3: * Inline drm_bridge_chain_get_next_bridge() (Suggested by Laurent)
Changes in v2: * Kill the last/first helpers (they're not really needed) * Drop the !bridge || !bridge->encoder test --- drivers/gpu/drm/drm_encoder.c | 2 +- drivers/gpu/drm/mediatek/mtk_hdmi.c | 6 ++++-- drivers/gpu/drm/omapdrm/omap_drv.c | 4 ++-- drivers/gpu/drm/omapdrm/omap_encoder.c | 3 ++- include/drm/drm_bridge.h | 13 +++++++++++++ 5 files changed, 22 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/drm_encoder.c b/drivers/gpu/drm/drm_encoder.c index 80d88a55302e..fcd3af1ac432 100644 --- a/drivers/gpu/drm/drm_encoder.c +++ b/drivers/gpu/drm/drm_encoder.c @@ -171,7 +171,7 @@ void drm_encoder_cleanup(struct drm_encoder *encoder) struct drm_bridge *next;
while (bridge) { - next = bridge->next; + next = drm_bridge_get_next_bridge(bridge); drm_bridge_detach(bridge); bridge = next; } diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c index ee3a5e9c10c4..5e4a4dbda443 100644 --- a/drivers/gpu/drm/mediatek/mtk_hdmi.c +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c @@ -1238,16 +1238,18 @@ static int mtk_hdmi_conn_mode_valid(struct drm_connector *conn, struct drm_display_mode *mode) { struct mtk_hdmi *hdmi = hdmi_ctx_from_conn(conn); + struct drm_bridge *next_bridge;
dev_dbg(hdmi->dev, "xres=%d, yres=%d, refresh=%d, intl=%d clock=%d\n", mode->hdisplay, mode->vdisplay, mode->vrefresh, !!(mode->flags & DRM_MODE_FLAG_INTERLACE), mode->clock * 1000);
- if (hdmi->bridge.next) { + next_bridge = drm_bridge_get_next_bridge(&hdmi->bridge); + if (next_bridge) { struct drm_display_mode adjusted_mode;
drm_mode_copy(&adjusted_mode, mode); - if (!drm_bridge_chain_mode_fixup(hdmi->bridge.next, mode, + if (!drm_bridge_chain_mode_fixup(next_bridge, mode, &adjusted_mode)) return MODE_BAD; } diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c index b3e22c890c51..d2750f60f519 100644 --- a/drivers/gpu/drm/omapdrm/omap_drv.c +++ b/drivers/gpu/drm/omapdrm/omap_drv.c @@ -217,8 +217,8 @@ static int omap_display_id(struct omap_dss_device *output) } else if (output->bridge) { struct drm_bridge *bridge = output->bridge;
- while (bridge->next) - bridge = bridge->next; + while (drm_bridge_get_next_bridge(bridge)) + bridge = drm_bridge_get_next_bridge(bridge);
node = bridge->of_node; } else if (output->panel) { diff --git a/drivers/gpu/drm/omapdrm/omap_encoder.c b/drivers/gpu/drm/omapdrm/omap_encoder.c index 24bbe9f2a32e..4f2165a37795 100644 --- a/drivers/gpu/drm/omapdrm/omap_encoder.c +++ b/drivers/gpu/drm/omapdrm/omap_encoder.c @@ -126,7 +126,8 @@ static void omap_encoder_mode_set(struct drm_encoder *encoder, for (dssdev = output; dssdev; dssdev = dssdev->next) omap_encoder_update_videomode_flags(&vm, dssdev->bus_flags);
- for (bridge = output->bridge; bridge; bridge = bridge->next) { + for (bridge = output->bridge; bridge; + bridge = drm_bridge_get_next_bridge(bridge)) { if (!bridge->timings) continue;
diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h index 726435baf4ad..46fc17c63a44 100644 --- a/include/drm/drm_bridge.h +++ b/include/drm/drm_bridge.h @@ -409,6 +409,19 @@ struct drm_bridge *of_drm_find_bridge(struct device_node *np); int drm_bridge_attach(struct drm_encoder *encoder, struct drm_bridge *bridge, struct drm_bridge *previous);
+/** + * drm_bridge_get_next_bridge() - Get the next bridge in the chain + * @bridge: bridge object + * + * RETURNS: + * the next bridge in the chain after @bridge, or NULL if @bridge is the last. + */ +static inline struct drm_bridge * +drm_bridge_get_next_bridge(struct drm_bridge *bridge) +{ + return bridge->next; +} + bool drm_bridge_chain_mode_fixup(struct drm_bridge *bridge, const struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode);