Hi Laurent, On 20/05/2021 07:50, Laurent Pinchart wrote: > Replace the manual panel handling with usage of the DRM panel bridge > helper. This simplifies the driver, and brings support for > DRM_BRIDGE_ATTACH_NO_CONNECTOR as an added bonus. > That's a lot of code removal. Excellent. Reviewed-by: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx> > Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx> > --- > drivers/gpu/drm/rcar-du/rcar_lvds.c | 120 +++------------------------- > 1 file changed, 12 insertions(+), 108 deletions(-) > > diff --git a/drivers/gpu/drm/rcar-du/rcar_lvds.c b/drivers/gpu/drm/rcar-du/rcar_lvds.c > index 70dbbe44bb23..1b360e06658c 100644 > --- a/drivers/gpu/drm/rcar-du/rcar_lvds.c > +++ b/drivers/gpu/drm/rcar-du/rcar_lvds.c > @@ -63,7 +63,6 @@ struct rcar_lvds { > struct drm_bridge bridge; > > struct drm_bridge *next_bridge; > - struct drm_connector connector; > struct drm_panel *panel; > > void __iomem *mmio; > @@ -80,73 +79,11 @@ struct rcar_lvds { > #define bridge_to_rcar_lvds(b) \ > container_of(b, struct rcar_lvds, bridge) > > -#define connector_to_rcar_lvds(c) \ > - container_of(c, struct rcar_lvds, connector) > - > static void rcar_lvds_write(struct rcar_lvds *lvds, u32 reg, u32 data) > { > iowrite32(data, lvds->mmio + reg); > } > > -/* ----------------------------------------------------------------------------- > - * Connector & Panel > - */ > - > -static int rcar_lvds_connector_get_modes(struct drm_connector *connector) > -{ > - struct rcar_lvds *lvds = connector_to_rcar_lvds(connector); > - > - return drm_panel_get_modes(lvds->panel, connector); > -} > - > -static int rcar_lvds_connector_atomic_check(struct drm_connector *connector, > - struct drm_atomic_state *state) > -{ > - struct rcar_lvds *lvds = connector_to_rcar_lvds(connector); > - const struct drm_display_mode *panel_mode; > - struct drm_connector_state *conn_state; > - struct drm_crtc_state *crtc_state; > - > - conn_state = drm_atomic_get_new_connector_state(state, connector); > - if (!conn_state->crtc) > - return 0; > - > - if (list_empty(&connector->modes)) { > - dev_dbg(lvds->dev, "connector: empty modes list\n"); > - return -EINVAL; > - } > - > - panel_mode = list_first_entry(&connector->modes, > - struct drm_display_mode, head); > - > - /* We're not allowed to modify the resolution. */ > - crtc_state = drm_atomic_get_crtc_state(state, conn_state->crtc); > - if (IS_ERR(crtc_state)) > - return PTR_ERR(crtc_state); > - > - if (crtc_state->mode.hdisplay != panel_mode->hdisplay || > - crtc_state->mode.vdisplay != panel_mode->vdisplay) > - return -EINVAL; > - > - /* The flat panel mode is fixed, just copy it to the adjusted mode. */ > - drm_mode_copy(&crtc_state->adjusted_mode, panel_mode); > - > - return 0; > -} > - > -static const struct drm_connector_helper_funcs rcar_lvds_conn_helper_funcs = { > - .get_modes = rcar_lvds_connector_get_modes, > - .atomic_check = rcar_lvds_connector_atomic_check, > -}; > - > -static const struct drm_connector_funcs rcar_lvds_conn_funcs = { > - .reset = drm_atomic_helper_connector_reset, > - .fill_modes = drm_helper_probe_single_connector_modes, > - .destroy = drm_connector_cleanup, > - .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, > - .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, > -}; > - > /* ----------------------------------------------------------------------------- > * PLL Setup > */ > @@ -583,11 +520,6 @@ static void __rcar_lvds_atomic_enable(struct drm_bridge *bridge, > /* Turn the output on. */ > lvdcr0 |= LVDCR0_LVRES; > rcar_lvds_write(lvds, LVDCR0, lvdcr0); > - > - if (lvds->panel) { > - drm_panel_prepare(lvds->panel); > - drm_panel_enable(lvds->panel); > - } > } > > static void rcar_lvds_atomic_enable(struct drm_bridge *bridge, > @@ -609,11 +541,6 @@ static void rcar_lvds_atomic_disable(struct drm_bridge *bridge, > { > struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge); > > - if (lvds->panel) { > - drm_panel_disable(lvds->panel); > - drm_panel_unprepare(lvds->panel); > - } > - > rcar_lvds_write(lvds, LVDCR0, 0); > rcar_lvds_write(lvds, LVDCR1, 0); > rcar_lvds_write(lvds, LVDPLLCR, 0); > @@ -648,45 +575,13 @@ static int rcar_lvds_attach(struct drm_bridge *bridge, > enum drm_bridge_attach_flags flags) > { > struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge); > - struct drm_connector *connector = &lvds->connector; > - struct drm_encoder *encoder = bridge->encoder; > - int ret; > > - /* If we have a next bridge just attach it. */ > - if (lvds->next_bridge) > - return drm_bridge_attach(bridge->encoder, lvds->next_bridge, > - bridge, flags); > - > - if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR) { > - DRM_ERROR("Fix bridge driver to make connector optional!"); > - return -EINVAL; > - } > - > - /* Otherwise if we have a panel, create a connector. */ > - if (!lvds->panel) > - return 0; > - > - ret = drm_connector_init(bridge->dev, connector, &rcar_lvds_conn_funcs, > - DRM_MODE_CONNECTOR_LVDS); > - if (ret < 0) > - return ret; > - > - drm_connector_helper_add(connector, &rcar_lvds_conn_helper_funcs); > - > - ret = drm_connector_attach_encoder(connector, encoder); > - if (ret < 0) > - return ret; > - > - return 0; > -} > - > -static void rcar_lvds_detach(struct drm_bridge *bridge) > -{ > + return drm_bridge_attach(bridge->encoder, lvds->next_bridge, bridge, > + flags); > } > > static const struct drm_bridge_funcs rcar_lvds_bridge_ops = { > .attach = rcar_lvds_attach, > - .detach = rcar_lvds_detach, > .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, > .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, > .atomic_reset = drm_atomic_helper_bridge_reset, > @@ -759,7 +654,7 @@ static int rcar_lvds_parse_dt_companion(struct rcar_lvds *lvds) > * that we are expected to generate even pixels from the primary > * encoder, and odd pixels from the companion encoder. > */ > - if (lvds->next_bridge && lvds->next_bridge->timings && > + if (lvds->next_bridge->timings && > lvds->next_bridge->timings->dual_link) > lvds->link_type = RCAR_LVDS_DUAL_LINK_EVEN_ODD_PIXELS; > else > @@ -811,6 +706,15 @@ static int rcar_lvds_parse_dt(struct rcar_lvds *lvds) > if (ret) > goto done; > > + if (lvds->panel) { > + lvds->next_bridge = devm_drm_panel_bridge_add(lvds->dev, > + lvds->panel); > + if (IS_ERR_OR_NULL(lvds->next_bridge)) { > + ret = -EINVAL; > + goto done; > + } > + } > + > if (lvds->info->quirks & RCAR_LVDS_QUIRK_DUAL_LINK) > ret = rcar_lvds_parse_dt_companion(lvds); > >