[PATCH v3 05/19] drm/msm/dsi: Use one connector for dual DSI mode
Sean Paul
seanpaul at chromium.org
Fri Jul 20 20:42:56 UTC 2018
From: Chandan Uddaraju <chandanu at 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 at codeaurora.org>
Signed-off-by: Chandan Uddaraju <chandanu at codeaurora.org>
[seanpaul removed unused local var causing a build warning]
Signed-off-by: Sean Paul <seanpaul at 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)
{
--
Sean Paul, Software Engineer, Google / Chromium OS
More information about the dri-devel
mailing list