On 12/05/2022 02:15, Douglas Anderson wrote:
This reverts commit 7d8e9a90509f1bd1d193a0c93cb8d1dbad9049fb.
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@xxxxxxxxxxxxxxx
Fixes: 7d8e9a90509f ("drm/msm/dsi: move DSI host powerup to modeset time")
Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
---
Changes in v2:
- Remove the mud from my face.
As stated, I'm for this revert, but after getting the mentioned patchset
in. Will that work for you? If not, I'd prefer to land a patch adding
modparam to powerup the DSI during the mode_set or during the pre_enabel().
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,
--
With best wishes
Dmitry
