From a99da3442b808bbe6feea3e62de752b46c1dcba4 Mon Sep 17 00:00:00 2001
From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Date: Thu, 25 Nov 2021 21:01:14 +0300
Subject: drm/msm/dsi: fix initialization in the bonded DSI case
Git-commit: 92cb1bedde9dba78d802fe2510949743a2581aed
Patch-mainline: v5.17-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
Commit 739b4e7756d3 ("drm/msm/dsi: Fix an error code in
msm_dsi_modeset_init()") changed msm_dsi_modeset_init() to return an
error code in case msm_dsi_manager_validate_current_config() returns
false. However this is not an error case, but a slave DSI of the bonded
DSI link. In this case msm_dsi_modeset_init() should return 0, but just
skip connector and bridge initialization.
To reduce possible confusion, drop the
msm_dsi_manager_validate_current_config() function, and specif 'bonded
&& !master' condition directly in the msm_dsi_modeset_init().
Fixes: 739b4e7756d3 ("drm/msm/dsi: Fix an error code in msm_dsi_modeset_init()")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Link: https://lore.kernel.org/r/20211125180114.561278-1-dmitry.baryshkov@linaro.org
Signed-off-by: Rob Clark <robdclark@chromium.org>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/msm/dsi/dsi.c | 10 +++++++---
drivers/gpu/drm/msm/dsi/dsi.h | 1 -
drivers/gpu/drm/msm/dsi/dsi_manager.c | 17 -----------------
3 files changed, 7 insertions(+), 21 deletions(-)
diff --git a/drivers/gpu/drm/msm/dsi/dsi.c b/drivers/gpu/drm/msm/dsi/dsi.c
index 9670e548b3e9..052548883d27 100644
--- a/drivers/gpu/drm/msm/dsi/dsi.c
+++ b/drivers/gpu/drm/msm/dsi/dsi.c
@@ -223,9 +223,13 @@ 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)) {
- ret = -EINVAL;
- goto fail;
+ if (msm_dsi_is_bonded_dsi(msm_dsi) &&
+ !msm_dsi_is_master_dsi(msm_dsi)) {
+ /*
+ * Do not return an eror here,
+ * Just skip creating encoder/connector for the slave-DSI.
+ */
+ return 0;
}
msm_dsi->encoder = encoder;
diff --git a/drivers/gpu/drm/msm/dsi/dsi.h b/drivers/gpu/drm/msm/dsi/dsi.h
index f46df52c6985..c8dedc95428c 100644
--- a/drivers/gpu/drm/msm/dsi/dsi.h
+++ b/drivers/gpu/drm/msm/dsi/dsi.h
@@ -82,7 +82,6 @@ int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg);
bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len);
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);
void msm_dsi_manager_tpg_enable(void);
/* msm dsi */
diff --git a/drivers/gpu/drm/msm/dsi/dsi_manager.c b/drivers/gpu/drm/msm/dsi/dsi_manager.c
index 681ca74fe410..f19bae475c96 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_manager.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_manager.c
@@ -645,23 +645,6 @@ struct drm_connector *msm_dsi_manager_connector_init(u8 id)
return ERR_PTR(ret);
}
-bool msm_dsi_manager_validate_current_config(u8 id)
-{
- bool is_bonded_dsi = IS_BONDED_DSI();
-
- /*
- * For bonded 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 bonded DSI configuration.
- */
- if (is_bonded_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)
{
--
2.38.1