This reverts commit c7e4a2a72e696aa6aed2c8b651279f491bb096fe.

The patch causes sc7180 Chromebooks that use the parade-ps8640 bridge chip to fail to turn the display back on after it turns off.

Let's revert to get these devices back to a working state. It seems like the DSI powerup problem is somewhat common and probably we should land something more general like Dave Stevenson's series [1] that would give more flexibility.

[1] https://lore.kernel.org/r/cover.1646406653.git.dave.stevenson@raspberrypi.co...

Fixes: c7e4a2a72e69 ("FROMGIT: drm/msm/dsi: move DSI host powerup to modeset time") Signed-off-by: Douglas Anderson dianders@chromium.org ---

drivers/gpu/drm/msm/dsi/dsi_manager.c | 43 ++++++++------------------- 1 file changed, 12 insertions(+), 31 deletions(-)

diff --git a/drivers/gpu/drm/msm/dsi/dsi_manager.c b/drivers/gpu/drm/msm/dsi/dsi_manager.c index 50b987658b1f..8d51711a3417 100644 --- a/drivers/gpu/drm/msm/dsi/dsi_manager.c +++ b/drivers/gpu/drm/msm/dsi/dsi_manager.c @@ -315,12 +315,13 @@ dsi_mgr_connector_best_encoder(struct drm_connector *connector) return msm_dsi_get_encoder(msm_dsi); }

-static void dsi_mgr_bridge_power_on(struct drm_bridge *bridge) +static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge) { int id = dsi_mgr_bridge_get_id(bridge); struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1); struct mipi_dsi_host *host = msm_dsi->host; + struct drm_panel *panel = msm_dsi->panel; struct msm_dsi_phy_shared_timings phy_shared_timings[DSI_MAX]; bool is_bonded_dsi = IS_BONDED_DSI(); int ret; @@ -361,34 +362,6 @@ static void dsi_mgr_bridge_power_on(struct drm_bridge *bridge) if (is_bonded_dsi && msm_dsi1) msm_dsi_host_enable_irq(msm_dsi1->host);

- return; - -host1_on_fail: - msm_dsi_host_power_off(host); -host_on_fail: - dsi_mgr_phy_disable(id); -phy_en_fail: - return; -} - -static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge) -{ - int id = dsi_mgr_bridge_get_id(bridge); - struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); - struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1); - struct mipi_dsi_host *host = msm_dsi->host; - struct drm_panel *panel = msm_dsi->panel; - bool is_bonded_dsi = IS_BONDED_DSI(); - int ret; - - DBG("id=%d", id); - if (!msm_dsi_device_connected(msm_dsi)) - return; - - /* Do nothing with the host if it is slave-DSI in case of bonded DSI */ - if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id)) - return; - /* Always call panel functions once, because even for dual panels, * there is only one drm_panel instance. */ @@ -423,7 +396,17 @@ static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge) if (panel) drm_panel_unprepare(panel); panel_prep_fail: + msm_dsi_host_disable_irq(host); + if (is_bonded_dsi && msm_dsi1) + msm_dsi_host_disable_irq(msm_dsi1->host);

+ if (is_bonded_dsi && msm_dsi1) + msm_dsi_host_power_off(msm_dsi1->host); +host1_on_fail: + msm_dsi_host_power_off(host); +host_on_fail: + dsi_mgr_phy_disable(id); +phy_en_fail: return; }

@@ -569,8 +552,6 @@ static void dsi_mgr_bridge_mode_set(struct drm_bridge *bridge, msm_dsi_host_set_display_mode(host, adjusted_mode); if (is_bonded_dsi && other_dsi) msm_dsi_host_set_display_mode(other_dsi->host, adjusted_mode); - - dsi_mgr_bridge_power_on(bridge); }

static enum drm_mode_status dsi_mgr_bridge_mode_valid(struct drm_bridge *bridge,