From: Chandan Uddaraju chandanu@codeaurora.org
Current DSI driver uses two connectors for dual DSI case even though we only have one panel. Fix this by implementing one connector/bridge for dual DSI use case. Use master DSI controllers to register one connector/bridge.
Changes in v3: - None
Reviewed-by: Archit Taneja architt@codeaurora.org Signed-off-by: Chandan Uddaraju chandanu@codeaurora.org [seanpaul removed unused local var causing a build warning] Signed-off-by: Sean Paul seanpaul@chromium.org --- drivers/gpu/drm/msm/dsi/dsi.c | 3 + drivers/gpu/drm/msm/dsi/dsi.h | 1 + drivers/gpu/drm/msm/dsi/dsi_manager.c | 112 ++++++-------------------- 3 files changed, 30 insertions(+), 86 deletions(-)
diff --git a/drivers/gpu/drm/msm/dsi/dsi.c b/drivers/gpu/drm/msm/dsi/dsi.c index b744bcc7d8ad..ff8164cc6738 100644 --- a/drivers/gpu/drm/msm/dsi/dsi.c +++ b/drivers/gpu/drm/msm/dsi/dsi.c @@ -208,6 +208,9 @@ int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev, goto fail; }
+ if (!msm_dsi_manager_validate_current_config(msm_dsi->id)) + goto fail; + msm_dsi->encoder = encoder;
msm_dsi->bridge = msm_dsi_manager_bridge_init(msm_dsi->id); diff --git a/drivers/gpu/drm/msm/dsi/dsi.h b/drivers/gpu/drm/msm/dsi/dsi.h index d3f613c76ffa..08f3fc6771b7 100644 --- a/drivers/gpu/drm/msm/dsi/dsi.h +++ b/drivers/gpu/drm/msm/dsi/dsi.h @@ -100,6 +100,7 @@ bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len); void msm_dsi_manager_attach_dsi_device(int id, u32 device_flags); int msm_dsi_manager_register(struct msm_dsi *msm_dsi); void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi); +bool msm_dsi_manager_validate_current_config(u8 id);
/* msm dsi */ static inline bool msm_dsi_device_connected(struct msm_dsi *msm_dsi) diff --git a/drivers/gpu/drm/msm/dsi/dsi_manager.c b/drivers/gpu/drm/msm/dsi/dsi_manager.c index 3bb506b44a4b..000721fe5ab4 100644 --- a/drivers/gpu/drm/msm/dsi/dsi_manager.c +++ b/drivers/gpu/drm/msm/dsi/dsi_manager.c @@ -306,102 +306,25 @@ static void dsi_mgr_connector_destroy(struct drm_connector *connector) kfree(dsi_connector); }
-static void dsi_dual_connector_fix_modes(struct drm_connector *connector) -{ - struct drm_display_mode *mode, *m; - - /* Only support left-right mode */ - list_for_each_entry_safe(mode, m, &connector->probed_modes, head) { - mode->clock >>= 1; - mode->hdisplay >>= 1; - mode->hsync_start >>= 1; - mode->hsync_end >>= 1; - mode->htotal >>= 1; - drm_mode_set_name(mode); - } -} - -static int dsi_dual_connector_tile_init( - struct drm_connector *connector, int id) -{ - struct drm_display_mode *mode; - /* Fake topology id */ - char topo_id[8] = {'M', 'S', 'M', 'D', 'U', 'D', 'S', 'I'}; - - if (connector->tile_group) { - DBG("Tile property has been initialized"); - return 0; - } - - /* Use the first mode only for now */ - mode = list_first_entry(&connector->probed_modes, - struct drm_display_mode, - head); - if (!mode) - return -EINVAL; - - connector->tile_group = drm_mode_get_tile_group( - connector->dev, topo_id); - if (!connector->tile_group) - connector->tile_group = drm_mode_create_tile_group( - connector->dev, topo_id); - if (!connector->tile_group) { - pr_err("%s: failed to create tile group\n", __func__); - return -ENOMEM; - } - - connector->has_tile = true; - connector->tile_is_single_monitor = true; - - /* mode has been fixed */ - connector->tile_h_size = mode->hdisplay; - connector->tile_v_size = mode->vdisplay; - - /* Only support left-right mode */ - connector->num_h_tile = 2; - connector->num_v_tile = 1; - - connector->tile_v_loc = 0; - connector->tile_h_loc = (id == DSI_RIGHT) ? 1 : 0; - - return 0; -} - static int dsi_mgr_connector_get_modes(struct drm_connector *connector) { int id = dsi_mgr_connector_get_id(connector); struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); struct drm_panel *panel = msm_dsi->panel; - int ret, num; + int num;
if (!panel) return 0;
- /* Since we have 2 connectors, but only 1 drm_panel in dual DSI mode, - * panel should not attach to any connector. - * Only temporarily attach panel to the current connector here, - * to let panel set mode to this connector. + /* + * In dual DSI mode, we have one connector that can be + * attached to the drm_panel. */ drm_panel_attach(panel, connector); num = drm_panel_get_modes(panel); - drm_panel_detach(panel); if (!num) return 0;
- if (IS_DUAL_DSI()) { - /* report half resolution to user */ - dsi_dual_connector_fix_modes(connector); - ret = dsi_dual_connector_tile_init(connector, id); - if (ret) - return ret; - ret = drm_mode_connector_set_tile_property(connector); - if (ret) { - pr_err("%s: set tile property failed, %d\n", - __func__, ret); - return ret; - } - } - return num; }
@@ -455,8 +378,8 @@ static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge) if (ret) goto phy_en_fail;
- /* Do nothing with the host if it is DSI 1 in case of dual DSI */ - if (is_dual_dsi && (DSI_1 == id)) + /* Do nothing with the host if it is slave-DSI in case of dual DSI */ + if (is_dual_dsi && !IS_MASTER_DSI_LINK(id)) return;
ret = msm_dsi_host_power_on(host, &phy_shared_timings[id], is_dual_dsi); @@ -557,11 +480,11 @@ static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge) return;
/* - * Do nothing with the host if it is DSI 1 in case of dual DSI. + * Do nothing with the host if it is slave-DSI in case of dual DSI. * It is safe to call dsi_mgr_phy_disable() here because a single PHY * won't be diabled until both PHYs request disable. */ - if (is_dual_dsi && (DSI_1 == id)) + if (is_dual_dsi && !IS_MASTER_DSI_LINK(id)) goto disable_phy;
if (panel) { @@ -622,7 +545,7 @@ static void dsi_mgr_bridge_mode_set(struct drm_bridge *bridge, mode->vsync_end, mode->vtotal, mode->type, mode->flags);
- if (is_dual_dsi && (DSI_1 == id)) + if (is_dual_dsi && !IS_MASTER_DSI_LINK(id)) return;
msm_dsi_host_set_display_mode(host, adjusted_mode); @@ -690,6 +613,23 @@ struct drm_connector *msm_dsi_manager_connector_init(u8 id) return connector; }
+bool msm_dsi_manager_validate_current_config(u8 id) +{ + bool is_dual_dsi = IS_DUAL_DSI(); + + /* + * For dual DSI, we only have one drm panel. For this + * use case, we register only one bridge/connector. + * Skip bridge/connector initialisation if it is + * slave-DSI for dual DSI configuration. + */ + if (is_dual_dsi && !IS_MASTER_DSI_LINK(id)) { + DBG("Skip bridge registration for slave DSI->id: %d\n", id); + return false; + } + return true; +} + /* initialize bridge */ struct drm_bridge *msm_dsi_manager_bridge_init(u8 id) {