[PATCH AUTOSEL 5.4 006/130] drm/amd/display: Do not silently accept DCC for multiplane formats.

[PATCH AUTOSEL 5.4 006/130] drm/amd/display: Do not silently accept DCC for multiplane formats.

[Sasha Levin]

From: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

[ Upstream commit b35ce7b364ec80b54f48a8fdf9fb74667774d2da ]

Silently accepting it could result in corruption.

Signed-off-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index d2dd387c95d86..ce70c42a2c3ec 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2734,7 +2734,7 @@ fill_plane_dcc_attributes(struct amdgpu_device *adev,
 		return 0;
 
 	if (format >= SURFACE_PIXEL_FORMAT_VIDEO_BEGIN)
-		return 0;
+		return -EINVAL;
 
 	if (!dc->cap_funcs.get_dcc_compression_cap)
 		return -EINVAL;
-- 
2.27.0

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Re: [PATCH AUTOSEL 5.4 006/130] drm/amd/display: Do not silently accept DCC for multiplane formats.

[Deucher, Alexander]

[-- Attachment #1.1: Type: text/plain, Size: 2554 bytes --]

[AMD Public Use]

I don't know if these fixes related to modifiers make sense in the pre-modifier code base.  Bas, Nick?

Alex
________________________________
From: amd-gfx <amd-gfx-bounces@lists.freedesktop.org> on behalf of Sasha Levin <sashal@kernel.org>
Sent: Tuesday, December 22, 2020 9:16 PM
To: linux-kernel@vger.kernel.org <linux-kernel@vger.kernel.org>; stable@vger.kernel.org <stable@vger.kernel.org>
Cc: Sasha Levin <sashal@kernel.org>; dri-devel@lists.freedesktop.org <dri-devel@lists.freedesktop.org>; amd-gfx@lists.freedesktop.org <amd-gfx@lists.freedesktop.org>; Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>; Deucher, Alexander <Alexander.Deucher@amd.com>; Kazlauskas, Nicholas <Nicholas.Kazlauskas@amd.com>
Subject: [PATCH AUTOSEL 5.4 006/130] drm/amd/display: Do not silently accept DCC for multiplane formats.

From: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

[ Upstream commit b35ce7b364ec80b54f48a8fdf9fb74667774d2da ]

Silently accepting it could result in corruption.

Signed-off-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index d2dd387c95d86..ce70c42a2c3ec 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2734,7 +2734,7 @@ fill_plane_dcc_attributes(struct amdgpu_device *adev,
                 return 0;

         if (format >= SURFACE_PIXEL_FORMAT_VIDEO_BEGIN)
-               return 0;
+               return -EINVAL;

         if (!dc->cap_funcs.get_dcc_compression_cap)
                 return -EINVAL;
--
2.27.0

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Re: [PATCH AUTOSEL 5.4 006/130] drm/amd/display: Do not silently accept DCC for multiplane formats.

[Kazlauskas, Nicholas]

On 2020-12-29 9:54 a.m., Deucher, Alexander wrote:
> [AMD Public Use]
> 
> 
> I don't know if these fixes related to modifiers make sense in the 
> pre-modifier code base.  Bas, Nick?
> 
> Alex

Mesa should be the only userspace trying to make use of DCC and it 
doesn't do it for video formats. From the kernel side of things we've 
also never supported this and you'd get corruption on the screen if you 
tried.

It's a "fix" for both pre-modifiers and post-modifiers code.

Regards,
Nicholas Kazlauskas

> ------------------------------------------------------------------------
> *From:* amd-gfx <amd-gfx-bounces@lists.freedesktop.org> on behalf of 
> Sasha Levin <sashal@kernel.org>
> *Sent:* Tuesday, December 22, 2020 9:16 PM
> *To:* linux-kernel@vger.kernel.org <linux-kernel@vger.kernel.org>; 
> stable@vger.kernel.org <stable@vger.kernel.org>
> *Cc:* Sasha Levin <sashal@kernel.org>; dri-devel@lists.freedesktop.org 
> <dri-devel@lists.freedesktop.org>; amd-gfx@lists.freedesktop.org 
> <amd-gfx@lists.freedesktop.org>; Bas Nieuwenhuizen 
> <bas@basnieuwenhuizen.nl>; Deucher, Alexander 
> <Alexander.Deucher@amd.com>; Kazlauskas, Nicholas 
> <Nicholas.Kazlauskas@amd.com>
> *Subject:* [PATCH AUTOSEL 5.4 006/130] drm/amd/display: Do not silently 
> accept DCC for multiplane formats.
> From: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
> 
> [ Upstream commit b35ce7b364ec80b54f48a8fdf9fb74667774d2da ]
> 
> Silently accepting it could result in corruption.
> 
> Signed-off-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
> Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
> Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
> Signed-off-by: Sasha Levin <sashal@kernel.org>
> ---
>   drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c 
> b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> index d2dd387c95d86..ce70c42a2c3ec 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> @@ -2734,7 +2734,7 @@ fill_plane_dcc_attributes(struct amdgpu_device *adev,
>                   return 0;
> 
>           if (format >= SURFACE_PIXEL_FORMAT_VIDEO_BEGIN)
> -               return 0;
> +               return -EINVAL;
> 
>           if (!dc->cap_funcs.get_dcc_compression_cap)
>                   return -EINVAL;
> -- 
> 2.27.0
> 
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> amd-gfx@lists.freedesktop.org
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[PATCH AUTOSEL 5.4 007/130] drm/msm: Fix race condition in msm driver with async layer updates

[Sasha Levin]

From: Krishna Manikandan <mkrishn@codeaurora.org>

[ Upstream commit b3d91800d9ac35014e0349292273a6fa7938d402 ]

When there are back to back commits with async cursor update,
there is a case where second commit can program the DPU hw
blocks while first didn't complete flushing config to HW.

Synchronize the compositions such that second commit waits
until first commit flushes the composition.

This change also introduces per crtc commit lock, such that
commits on different crtcs are not blocked by each other.

Changes in v2:
	- Use an array of mutexes in kms to handle commit
	  lock per crtc. (Rob Clark)

Changes in v3:
	- Add wrapper functions to handle lock and unlock of
	  commit_lock for each crtc. (Rob Clark)

Signed-off-by: Krishna Manikandan <mkrishn@codeaurora.org>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/msm/msm_atomic.c | 37 +++++++++++++++++++++-----------
 drivers/gpu/drm/msm/msm_kms.h    |  6 ++++--
 2 files changed, 28 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c
index 561bfa48841c3..575e9af9b6fc9 100644
--- a/drivers/gpu/drm/msm/msm_atomic.c
+++ b/drivers/gpu/drm/msm/msm_atomic.c
@@ -55,16 +55,32 @@ static void vblank_put(struct msm_kms *kms, unsigned crtc_mask)
 	}
 }
 
+static void lock_crtcs(struct msm_kms *kms, unsigned int crtc_mask)
+{
+	struct drm_crtc *crtc;
+
+	for_each_crtc_mask(kms->dev, crtc, crtc_mask)
+		mutex_lock(&kms->commit_lock[drm_crtc_index(crtc)]);
+}
+
+static void unlock_crtcs(struct msm_kms *kms, unsigned int crtc_mask)
+{
+	struct drm_crtc *crtc;
+
+	for_each_crtc_mask(kms->dev, crtc, crtc_mask)
+		mutex_unlock(&kms->commit_lock[drm_crtc_index(crtc)]);
+}
+
 static void msm_atomic_async_commit(struct msm_kms *kms, int crtc_idx)
 {
 	unsigned crtc_mask = BIT(crtc_idx);
 
 	trace_msm_atomic_async_commit_start(crtc_mask);
 
-	mutex_lock(&kms->commit_lock);
+	lock_crtcs(kms, crtc_mask);
 
 	if (!(kms->pending_crtc_mask & crtc_mask)) {
-		mutex_unlock(&kms->commit_lock);
+		unlock_crtcs(kms, crtc_mask);
 		goto out;
 	}
 
@@ -79,7 +95,6 @@ static void msm_atomic_async_commit(struct msm_kms *kms, int crtc_idx)
 	 */
 	trace_msm_atomic_flush_commit(crtc_mask);
 	kms->funcs->flush_commit(kms, crtc_mask);
-	mutex_unlock(&kms->commit_lock);
 
 	/*
 	 * Wait for flush to complete:
@@ -90,9 +105,8 @@ static void msm_atomic_async_commit(struct msm_kms *kms, int crtc_idx)
 
 	vblank_put(kms, crtc_mask);
 
-	mutex_lock(&kms->commit_lock);
 	kms->funcs->complete_commit(kms, crtc_mask);
-	mutex_unlock(&kms->commit_lock);
+	unlock_crtcs(kms, crtc_mask);
 	kms->funcs->disable_commit(kms);
 
 out:
@@ -189,12 +203,11 @@ void msm_atomic_commit_tail(struct drm_atomic_state *state)
 	 * Ensure any previous (potentially async) commit has
 	 * completed:
 	 */
+	lock_crtcs(kms, crtc_mask);
 	trace_msm_atomic_wait_flush_start(crtc_mask);
 	kms->funcs->wait_flush(kms, crtc_mask);
 	trace_msm_atomic_wait_flush_finish(crtc_mask);
 
-	mutex_lock(&kms->commit_lock);
-
 	/*
 	 * Now that there is no in-progress flush, prepare the
 	 * current update:
@@ -232,8 +245,7 @@ void msm_atomic_commit_tail(struct drm_atomic_state *state)
 		}
 
 		kms->funcs->disable_commit(kms);
-		mutex_unlock(&kms->commit_lock);
-
+		unlock_crtcs(kms, crtc_mask);
 		/*
 		 * At this point, from drm core's perspective, we
 		 * are done with the atomic update, so we can just
@@ -260,8 +272,7 @@ void msm_atomic_commit_tail(struct drm_atomic_state *state)
 	 */
 	trace_msm_atomic_flush_commit(crtc_mask);
 	kms->funcs->flush_commit(kms, crtc_mask);
-	mutex_unlock(&kms->commit_lock);
-
+	unlock_crtcs(kms, crtc_mask);
 	/*
 	 * Wait for flush to complete:
 	 */
@@ -271,9 +282,9 @@ void msm_atomic_commit_tail(struct drm_atomic_state *state)
 
 	vblank_put(kms, crtc_mask);
 
-	mutex_lock(&kms->commit_lock);
+	lock_crtcs(kms, crtc_mask);
 	kms->funcs->complete_commit(kms, crtc_mask);
-	mutex_unlock(&kms->commit_lock);
+	unlock_crtcs(kms, crtc_mask);
 	kms->funcs->disable_commit(kms);
 
 	drm_atomic_helper_commit_hw_done(state);
diff --git a/drivers/gpu/drm/msm/msm_kms.h b/drivers/gpu/drm/msm/msm_kms.h
index 1cbef6b200b70..2049847b66428 100644
--- a/drivers/gpu/drm/msm/msm_kms.h
+++ b/drivers/gpu/drm/msm/msm_kms.h
@@ -155,7 +155,7 @@ struct msm_kms {
 	 * For async commit, where ->flush_commit() and later happens
 	 * from the crtc's pending_timer close to end of the frame:
 	 */
-	struct mutex commit_lock;
+	struct mutex commit_lock[MAX_CRTCS];
 	unsigned pending_crtc_mask;
 	struct msm_pending_timer pending_timers[MAX_CRTCS];
 };
@@ -165,7 +165,9 @@ static inline void msm_kms_init(struct msm_kms *kms,
 {
 	unsigned i;
 
-	mutex_init(&kms->commit_lock);
+	for (i = 0; i < ARRAY_SIZE(kms->commit_lock); i++)
+		mutex_init(&kms->commit_lock[i]);
+
 	kms->funcs = funcs;
 
 	for (i = 0; i < ARRAY_SIZE(kms->pending_timers); i++)
-- 
2.27.0

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[PATCH AUTOSEL 5.4 024/130] drm: panel: simple: add missing platform_driver_unregister() in panel_simple_init

[Sasha Levin]

From: Qinglang Miao <miaoqinglang@huawei.com>

[ Upstream commit f2e66f212a9de04afc2caa5ec79057c0ac75c728 ]

Add the missing platform_driver_unregister() before return
from panel_simple_init in the error handling case when failed
to register panel_simple_dsi_driver with CONFIG_DRM_MIPI_DSI
enabled.

Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20201031011856.137307-1-miaoqinglang@huawei.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/panel/panel-simple.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index f0ea782df836d..579d53e9a769c 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -3777,8 +3777,10 @@ static int __init panel_simple_init(void)
 
 	if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) {
 		err = mipi_dsi_driver_register(&panel_simple_dsi_driver);
-		if (err < 0)
+		if (err < 0) {
+			platform_driver_unregister(&panel_simple_platform_driver);
 			return err;
+		}
 	}
 
 	return 0;
-- 
2.27.0

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[PATCH AUTOSEL 5.4 025/130] drm/ast: Fixed 1920x1080 sync. polarity issue

[Sasha Levin]

From: KuoHsiang Chou <kuohsiang_chou@aspeedtech.com>

[ Upstream commit 2d26123dd9075df82f217364f585a3a6aab5412d ]

[Bug] Change the vertical synchroous polary of 1920x1080 @60Hz
      from  Negtive to Positive

Signed-off-by: KuoHsiang Chou <kuohsiang_chou@aspeedtech.com>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20201105094729.106059-1-kuohsiang_chou@aspeedtech.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/ast/ast_tables.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/ast/ast_tables.h b/drivers/gpu/drm/ast/ast_tables.h
index d665dd5af5dd8..dbe1cc620f6e6 100644
--- a/drivers/gpu/drm/ast/ast_tables.h
+++ b/drivers/gpu/drm/ast/ast_tables.h
@@ -293,10 +293,10 @@ static const struct ast_vbios_enhtable res_1600x900[] = {
 
 static const struct ast_vbios_enhtable res_1920x1080[] = {
 	{2200, 1920, 88, 44, 1125, 1080, 4, 5, VCLK148_5,	/* 60Hz */
-	 (SyncNP | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo |
+	 (SyncPP | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo |
 	  AST2500PreCatchCRT), 60, 1, 0x38 },
 	{2200, 1920, 88, 44, 1125, 1080, 4, 5, VCLK148_5,	/* 60Hz */
-	 (SyncNP | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo |
+	 (SyncPP | Charx8Dot | LineCompareOff | WideScreenMode | NewModeInfo |
 	  AST2500PreCatchCRT), 0xFF, 1, 0x38 },
 };
 
-- 
2.27.0

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[PATCH AUTOSEL 5.4 030/130] drm/omap: Fix runtime PM imbalance on error

[Sasha Levin]

From: Dinghao Liu <dinghao.liu@zju.edu.cn>

[ Upstream commit a5d704d33245b0799947a3008f9f376dba4d5c91 ]

pm_runtime_get_sync() increments the runtime PM usage counter
even when it returns an error code. However, users of its
direct wrappers in omapdrm assume that PM usage counter will
not change on error. Thus a pairing decrement is needed on
the error handling path for these wrappers to keep the counter
balanced.

Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200822065743.13671-1-dinghao.liu@zju.edu.cn
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/omapdrm/dss/dispc.c | 7 +++++--
 drivers/gpu/drm/omapdrm/dss/dsi.c   | 7 +++++--
 drivers/gpu/drm/omapdrm/dss/dss.c   | 7 +++++--
 drivers/gpu/drm/omapdrm/dss/hdmi4.c | 6 +++---
 drivers/gpu/drm/omapdrm/dss/hdmi5.c | 6 +++---
 drivers/gpu/drm/omapdrm/dss/venc.c  | 7 +++++--
 6 files changed, 26 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/dss/dispc.c b/drivers/gpu/drm/omapdrm/dss/dispc.c
index ed0ccbeed70f2..d31ce81f03e7c 100644
--- a/drivers/gpu/drm/omapdrm/dss/dispc.c
+++ b/drivers/gpu/drm/omapdrm/dss/dispc.c
@@ -664,8 +664,11 @@ int dispc_runtime_get(struct dispc_device *dispc)
 	DSSDBG("dispc_runtime_get\n");
 
 	r = pm_runtime_get_sync(&dispc->pdev->dev);
-	WARN_ON(r < 0);
-	return r < 0 ? r : 0;
+	if (WARN_ON(r < 0)) {
+		pm_runtime_put_noidle(&dispc->pdev->dev);
+		return r;
+	}
+	return 0;
 }
 
 void dispc_runtime_put(struct dispc_device *dispc)
diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c
index b30fcaa2d0f55..a821359879922 100644
--- a/drivers/gpu/drm/omapdrm/dss/dsi.c
+++ b/drivers/gpu/drm/omapdrm/dss/dsi.c
@@ -1112,8 +1112,11 @@ static int dsi_runtime_get(struct dsi_data *dsi)
 	DSSDBG("dsi_runtime_get\n");
 
 	r = pm_runtime_get_sync(dsi->dev);
-	WARN_ON(r < 0);
-	return r < 0 ? r : 0;
+	if (WARN_ON(r < 0)) {
+		pm_runtime_put_noidle(dsi->dev);
+		return r;
+	}
+	return 0;
 }
 
 static void dsi_runtime_put(struct dsi_data *dsi)
diff --git a/drivers/gpu/drm/omapdrm/dss/dss.c b/drivers/gpu/drm/omapdrm/dss/dss.c
index ac93dae2a9c84..f4fedaa7b6b33 100644
--- a/drivers/gpu/drm/omapdrm/dss/dss.c
+++ b/drivers/gpu/drm/omapdrm/dss/dss.c
@@ -858,8 +858,11 @@ int dss_runtime_get(struct dss_device *dss)
 	DSSDBG("dss_runtime_get\n");
 
 	r = pm_runtime_get_sync(&dss->pdev->dev);
-	WARN_ON(r < 0);
-	return r < 0 ? r : 0;
+	if (WARN_ON(r < 0)) {
+		pm_runtime_put_noidle(&dss->pdev->dev);
+		return r;
+	}
+	return 0;
 }
 
 void dss_runtime_put(struct dss_device *dss)
diff --git a/drivers/gpu/drm/omapdrm/dss/hdmi4.c b/drivers/gpu/drm/omapdrm/dss/hdmi4.c
index 0f557fad4513f..6564285a4a2f7 100644
--- a/drivers/gpu/drm/omapdrm/dss/hdmi4.c
+++ b/drivers/gpu/drm/omapdrm/dss/hdmi4.c
@@ -41,10 +41,10 @@ static int hdmi_runtime_get(struct omap_hdmi *hdmi)
 	DSSDBG("hdmi_runtime_get\n");
 
 	r = pm_runtime_get_sync(&hdmi->pdev->dev);
-	WARN_ON(r < 0);
-	if (r < 0)
+	if (WARN_ON(r < 0)) {
+		pm_runtime_put_noidle(&hdmi->pdev->dev);
 		return r;
-
+	}
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/omapdrm/dss/hdmi5.c b/drivers/gpu/drm/omapdrm/dss/hdmi5.c
index d9463b3325543..0d7267e25681e 100644
--- a/drivers/gpu/drm/omapdrm/dss/hdmi5.c
+++ b/drivers/gpu/drm/omapdrm/dss/hdmi5.c
@@ -42,10 +42,10 @@ static int hdmi_runtime_get(struct omap_hdmi *hdmi)
 	DSSDBG("hdmi_runtime_get\n");
 
 	r = pm_runtime_get_sync(&hdmi->pdev->dev);
-	WARN_ON(r < 0);
-	if (r < 0)
+	if (WARN_ON(r < 0)) {
+		pm_runtime_put_noidle(&hdmi->pdev->dev);
 		return r;
-
+	}
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/omapdrm/dss/venc.c b/drivers/gpu/drm/omapdrm/dss/venc.c
index 596a297d58139..301c7c4b2ed2e 100644
--- a/drivers/gpu/drm/omapdrm/dss/venc.c
+++ b/drivers/gpu/drm/omapdrm/dss/venc.c
@@ -403,8 +403,11 @@ static int venc_runtime_get(struct venc_device *venc)
 	DSSDBG("venc_runtime_get\n");
 
 	r = pm_runtime_get_sync(&venc->pdev->dev);
-	WARN_ON(r < 0);
-	return r < 0 ? r : 0;
+	if (WARN_ON(r < 0)) {
+		pm_runtime_put_noidle(&venc->pdev->dev);
+		return r;
+	}
+	return 0;
 }
 
 static void venc_runtime_put(struct venc_device *venc)
-- 
2.27.0

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[PATCH AUTOSEL 5.4 032/130] drm/amd/amdgpu: Add rev_id workaround logic for SRIOV setup

[Sasha Levin]

From: Bokun Zhang <Bokun.Zhang@amd.com>

[ Upstream commit de21e4aeb2b26128dcc5be1bcb2fafa73d041e51 ]

- When we are under SRIOV setup, the rev_id cannot be read
  properly. Therefore, we will return default value for it

Signed-off-by: Bokun Zhang <Bokun.Zhang@amd.com>
Reviewed-by: Monk Liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c b/drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c
index c05d78d4efc66..56887affc13be 100644
--- a/drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c
+++ b/drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c
@@ -34,8 +34,17 @@
 
 static u32 nbio_v2_3_get_rev_id(struct amdgpu_device *adev)
 {
-	u32 tmp = RREG32_SOC15(NBIO, 0, mmRCC_DEV0_EPF0_STRAP0);
+	u32 tmp;
 
+	/*
+	 * guest vm gets 0xffffffff when reading RCC_DEV0_EPF0_STRAP0,
+	 * therefore we force rev_id to 0 (which is the default value)
+	 */
+	if (amdgpu_sriov_vf(adev)) {
+		return 0;
+	}
+
+	tmp = RREG32_SOC15(NBIO, 0, mmRCC_DEV0_EPF0_STRAP0);
 	tmp &= RCC_DEV0_EPF0_STRAP0__STRAP_ATI_REV_ID_DEV0_F0_MASK;
 	tmp >>= RCC_DEV0_EPF0_STRAP0__STRAP_ATI_REV_ID_DEV0_F0__SHIFT;
 
-- 
2.27.0

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[PATCH AUTOSEL 5.4 080/130] drm/amd/display: Update dram_clock_change_latency for DCN2.1

[Sasha Levin]

From: Sung Lee <sung.lee@amd.com>

[ Upstream commit 901c1ec05ef277ce9d43cb806a225b28b3efe89a ]

[WHY]
dram clock change latencies get updated using ddr4 latency table, but
does that update does not happen before validation. This value
should not be the default and should be number received from
df for better mode support.
This may cause a PState hang on high refresh panels with short vblanks
such as on 1080p 360hz or 300hz panels.

[HOW]
Update latency from 23.84 to 11.72.

Signed-off-by: Sung Lee <sung.lee@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
index bb7add5ea2273..a6d5beada6634 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
@@ -257,7 +257,7 @@ struct _vcs_dpi_soc_bounding_box_st dcn2_1_soc = {
 	.num_banks = 8,
 	.num_chans = 4,
 	.vmm_page_size_bytes = 4096,
-	.dram_clock_change_latency_us = 23.84,
+	.dram_clock_change_latency_us = 11.72,
 	.return_bus_width_bytes = 64,
 	.dispclk_dppclk_vco_speed_mhz = 3600,
 	.xfc_bus_transport_time_us = 4,
-- 
2.27.0

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[PATCH AUTOSEL 5.4 096/130] drm/amd/display: Revert DCN2.1 dram_clock_change_latency update

[Sasha Levin]

From: Michael Strauss <michael.strauss@amd.com>

[ Upstream commit 3abad347c432b9f5904cfad40f417d5cff90300c ]

[Why]
New value breaks VSR on high refresh panels, reverting until a fix is developed

Signed-off-by: Michael Strauss <michael.strauss@amd.com>
Signed-off-by: Sung Lee <sung.lee@amd.com>
Reviewed-by: Yongqiang Sun <yongqiang.sun@amd.com>
Acked-by: Eryk Brol <eryk.brol@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
index a6d5beada6634..bb7add5ea2273 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
@@ -257,7 +257,7 @@ struct _vcs_dpi_soc_bounding_box_st dcn2_1_soc = {
 	.num_banks = 8,
 	.num_chans = 4,
 	.vmm_page_size_bytes = 4096,
-	.dram_clock_change_latency_us = 11.72,
+	.dram_clock_change_latency_us = 23.84,
 	.return_bus_width_bytes = 64,
 	.dispclk_dppclk_vco_speed_mhz = 3600,
 	.xfc_bus_transport_time_us = 4,
-- 
2.27.0

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