From c369cb27c267fe3020f3b059618743532f73503b Mon Sep 17 00:00:00 2001 From: Paul Cercueil Date: Thu, 16 Jul 2020 18:38:45 +0200 Subject: [PATCH] drm/ingenic: Support multiple panels/bridges Support multiple panels or bridges connected to the same DPI output of the SoC. This setup can be found for instance on the GCW Zero, where the same DPI output interfaces the internal 320x240 TFT panel, and the ITE IT6610 HDMI chip. v2: No change v3: Allow > 80-char lines where it makes sense Signed-off-by: Paul Cercueil Reviewed-by: Sam Ravnborg Link: https://patchwork.freedesktop.org/patch/msgid/20200716163846.174790-11-paul@crapouillou.net --- drivers/gpu/drm/ingenic/ingenic-drm-drv.c | 71 +++++++++++++---------- 1 file changed, 40 insertions(+), 31 deletions(-) diff --git a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c index bc2a7e9bab07..c755bdd5563b 100644 --- a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c +++ b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c @@ -57,7 +57,6 @@ struct ingenic_drm { */ struct drm_plane f0, f1, *ipu_plane; struct drm_crtc crtc; - struct drm_encoder encoder; struct device *dev; struct regmap *map; @@ -112,12 +111,6 @@ static inline struct ingenic_drm *drm_crtc_get_priv(struct drm_crtc *crtc) return container_of(crtc, struct ingenic_drm, crtc); } -static inline struct ingenic_drm * -drm_encoder_get_priv(struct drm_encoder *encoder) -{ - return container_of(encoder, struct ingenic_drm, encoder); -} - static void ingenic_drm_crtc_atomic_enable(struct drm_crtc *crtc, struct drm_crtc_state *state) { @@ -468,7 +461,7 @@ static void ingenic_drm_encoder_atomic_mode_set(struct drm_encoder *encoder, struct drm_crtc_state *crtc_state, struct drm_connector_state *conn_state) { - struct ingenic_drm *priv = drm_encoder_get_priv(encoder); + struct ingenic_drm *priv = drm_device_get_priv(encoder->dev); struct drm_display_mode *mode = &crtc_state->adjusted_mode; struct drm_connector *conn = conn_state->connector; struct drm_display_info *info = &conn->display_info; @@ -688,9 +681,11 @@ static int ingenic_drm_bind(struct device *dev) struct clk *parent_clk; struct drm_bridge *bridge; struct drm_panel *panel; + struct drm_encoder *encoder; struct drm_device *drm; void __iomem *base; long parent_rate; + unsigned int i, clone_mask = 0; int ret, irq; soc_info = of_device_get_match_data(dev); @@ -752,17 +747,6 @@ static int ingenic_drm_bind(struct device *dev) return PTR_ERR(priv->pix_clk); } - ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &panel, &bridge); - if (ret) { - if (ret != -EPROBE_DEFER) - dev_err(dev, "Failed to get panel handle\n"); - return ret; - } - - if (panel) - bridge = devm_drm_panel_bridge_add_typed(dev, panel, - DRM_MODE_CONNECTOR_DPI); - priv->dma_hwdesc_f1 = dmam_alloc_coherent(dev, sizeof(*priv->dma_hwdesc_f1), &priv->dma_hwdesc_phys_f1, GFP_KERNEL); @@ -844,22 +828,47 @@ static int ingenic_drm_bind(struct device *dev) } } - priv->encoder.possible_crtcs = 1; + for (i = 0; ; i++) { + ret = drm_of_find_panel_or_bridge(dev->of_node, 0, i, &panel, &bridge); + if (ret) { + if (ret == -ENODEV) + break; /* we're done */ + if (ret != -EPROBE_DEFER) + dev_err(dev, "Failed to get bridge handle\n"); + return ret; + } - drm_encoder_helper_add(&priv->encoder, - &ingenic_drm_encoder_helper_funcs); + if (panel) + bridge = devm_drm_panel_bridge_add_typed(dev, panel, + DRM_MODE_CONNECTOR_DPI); - ret = drm_simple_encoder_init(drm, &priv->encoder, - DRM_MODE_ENCODER_DPI); - if (ret) { - dev_err(dev, "Failed to init encoder: %i\n", ret); - return ret; + encoder = devm_kzalloc(dev, sizeof(*encoder), GFP_KERNEL); + if (!encoder) + return -ENOMEM; + + encoder->possible_crtcs = 1; + + drm_encoder_helper_add(encoder, &ingenic_drm_encoder_helper_funcs); + + ret = drm_simple_encoder_init(drm, encoder, DRM_MODE_ENCODER_DPI); + if (ret) { + dev_err(dev, "Failed to init encoder: %d\n", ret); + return ret; + } + + ret = drm_bridge_attach(encoder, bridge, NULL, 0); + if (ret) { + dev_err(dev, "Unable to attach bridge\n"); + return ret; + } } - ret = drm_bridge_attach(&priv->encoder, bridge, NULL, 0); - if (ret) { - dev_err(dev, "Unable to attach bridge\n"); - return ret; + drm_for_each_encoder(encoder, drm) { + clone_mask |= BIT(drm_encoder_index(encoder)); + } + + drm_for_each_encoder(encoder, drm) { + encoder->possible_clones = clone_mask; } ret = drm_irq_install(drm, irq);