The patch below does not apply to the 6.7-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.7.y
git checkout FETCH_HEAD
git cherry-pick -x fcd94ef1b3e78f7dc76309c9611915018d2d62a3
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024012736-handwash-trade-ffab@gregkh' --subject-prefix 'PATCH 6.7.y' HEAD^..
Possible dependencies:
fcd94ef1b3e7 ("drm/amd/display: Remove min_dst_y_next_start check for Z8")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From fcd94ef1b3e78f7dc76309c9611915018d2d62a3 Mon Sep 17 00:00:00 2001
From: Nicholas Kazlauskas <nicholas.kazlauskas(a)amd.com>
Date: Wed, 8 Nov 2023 10:55:53 -0500
Subject: [PATCH] drm/amd/display: Remove min_dst_y_next_start check for Z8
[Why]
Flickering occurs on DRR supported panels when engaged in DRR due to
min_dst_y_next becoming larger than the frame size itself.
[How]
In general, we should be able to enter Z8 when this is engaged but it
might be a net power loss even if the calculation wasn't bugged.
Don't support enabling Z8 during the DRR region.
Cc: stable(a)vger.kernel.org # 6.1+
Reviewed-by: Syed Hassan <syed.hassan(a)amd.com>
Acked-by: Hamza Mahfooz <hamza.mahfooz(a)amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas(a)amd.com>
Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com>
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.c
index 7fc8b18096ba..ec77b2b41ba3 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn20/dcn20_fpu.c
@@ -950,10 +950,8 @@ static enum dcn_zstate_support_state decide_zstate_support(struct dc *dc, struc
{
int plane_count;
int i;
- unsigned int min_dst_y_next_start_us;
plane_count = 0;
- min_dst_y_next_start_us = 0;
for (i = 0; i < dc->res_pool->pipe_count; i++) {
if (context->res_ctx.pipe_ctx[i].plane_state)
plane_count++;
@@ -975,26 +973,15 @@ static enum dcn_zstate_support_state decide_zstate_support(struct dc *dc, struc
else if (context->stream_count == 1 && context->streams[0]->signal == SIGNAL_TYPE_EDP) {
struct dc_link *link = context->streams[0]->sink->link;
struct dc_stream_status *stream_status = &context->stream_status[0];
- struct dc_stream_state *current_stream = context->streams[0];
int minmum_z8_residency = dc->debug.minimum_z8_residency_time > 0 ? dc->debug.minimum_z8_residency_time : 1000;
bool allow_z8 = context->bw_ctx.dml.vba.StutterPeriod > (double)minmum_z8_residency;
bool is_pwrseq0 = link->link_index == 0;
- bool isFreesyncVideo;
-
- isFreesyncVideo = current_stream->adjust.v_total_min == current_stream->adjust.v_total_max;
- isFreesyncVideo = isFreesyncVideo && current_stream->timing.v_total < current_stream->adjust.v_total_min;
- for (i = 0; i < dc->res_pool->pipe_count; i++) {
- if (context->res_ctx.pipe_ctx[i].stream == current_stream && isFreesyncVideo) {
- min_dst_y_next_start_us = context->res_ctx.pipe_ctx[i].dlg_regs.min_dst_y_next_start_us;
- break;
- }
- }
/* Don't support multi-plane configurations */
if (stream_status->plane_count > 1)
return DCN_ZSTATE_SUPPORT_DISALLOW;
- if (is_pwrseq0 && (context->bw_ctx.dml.vba.StutterPeriod > 5000.0 || min_dst_y_next_start_us > 5000))
+ if (is_pwrseq0 && context->bw_ctx.dml.vba.StutterPeriod > 5000.0)
return DCN_ZSTATE_SUPPORT_ALLOW;
else if (is_pwrseq0 && link->psr_settings.psr_version == DC_PSR_VERSION_1 && !link->panel_config.psr.disable_psr)
return allow_z8 ? DCN_ZSTATE_SUPPORT_ALLOW_Z8_Z10_ONLY : DCN_ZSTATE_SUPPORT_ALLOW_Z10_ONLY;
The patch below does not apply to the 6.1-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y
git checkout FETCH_HEAD
git cherry-pick -x 7a6931a476d30f0d6bf70b01a925f76f92d23940
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024012721-lushly-eliminate-aa66@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^..
Possible dependencies:
7a6931a476d3 ("drm/amd/display: fix ABM disablement")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 7a6931a476d30f0d6bf70b01a925f76f92d23940 Mon Sep 17 00:00:00 2001
From: Hamza Mahfooz <hamza.mahfooz(a)amd.com>
Date: Wed, 22 Nov 2023 14:50:34 -0500
Subject: [PATCH] drm/amd/display: fix ABM disablement
On recent versions of DMUB firmware, if we want to completely disable
ABM we have to pass ABM_LEVEL_IMMEDIATE_DISABLE as the requested ABM
level to DMUB. Otherwise, LCD eDP displays are unable to reach their
maximum brightness levels. So, to fix this whenever the user requests an
ABM level of 0 pass ABM_LEVEL_IMMEDIATE_DISABLE to DMUB instead. Also,
to keep the user's experience consistent map ABM_LEVEL_IMMEDIATE_DISABLE
to 0 when a user tries to read the requested ABM level.
Cc: stable(a)vger.kernel.org # 6.1+
Reviewed-by: Harry Wentland <harry.wentland(a)amd.com>
Signed-off-by: Hamza Mahfooz <hamza.mahfooz(a)amd.com>
Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com>
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 2be64c593c87..39a4b47b6804 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -6248,7 +6248,7 @@ int amdgpu_dm_connector_atomic_set_property(struct drm_connector *connector,
dm_new_state->underscan_enable = val;
ret = 0;
} else if (property == adev->mode_info.abm_level_property) {
- dm_new_state->abm_level = val;
+ dm_new_state->abm_level = val ?: ABM_LEVEL_IMMEDIATE_DISABLE;
ret = 0;
}
@@ -6293,7 +6293,8 @@ int amdgpu_dm_connector_atomic_get_property(struct drm_connector *connector,
*val = dm_state->underscan_enable;
ret = 0;
} else if (property == adev->mode_info.abm_level_property) {
- *val = dm_state->abm_level;
+ *val = (dm_state->abm_level != ABM_LEVEL_IMMEDIATE_DISABLE) ?
+ dm_state->abm_level : 0;
ret = 0;
}
@@ -6366,7 +6367,8 @@ void amdgpu_dm_connector_funcs_reset(struct drm_connector *connector)
state->pbn = 0;
if (connector->connector_type == DRM_MODE_CONNECTOR_eDP)
- state->abm_level = amdgpu_dm_abm_level;
+ state->abm_level = amdgpu_dm_abm_level ?:
+ ABM_LEVEL_IMMEDIATE_DISABLE;
__drm_atomic_helper_connector_reset(connector, &state->base);
}
The patch below does not apply to the 6.6-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y
git checkout FETCH_HEAD
git cherry-pick -x 7a6931a476d30f0d6bf70b01a925f76f92d23940
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024012720-walnut-proofs-101c@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..
Possible dependencies:
7a6931a476d3 ("drm/amd/display: fix ABM disablement")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 7a6931a476d30f0d6bf70b01a925f76f92d23940 Mon Sep 17 00:00:00 2001
From: Hamza Mahfooz <hamza.mahfooz(a)amd.com>
Date: Wed, 22 Nov 2023 14:50:34 -0500
Subject: [PATCH] drm/amd/display: fix ABM disablement
On recent versions of DMUB firmware, if we want to completely disable
ABM we have to pass ABM_LEVEL_IMMEDIATE_DISABLE as the requested ABM
level to DMUB. Otherwise, LCD eDP displays are unable to reach their
maximum brightness levels. So, to fix this whenever the user requests an
ABM level of 0 pass ABM_LEVEL_IMMEDIATE_DISABLE to DMUB instead. Also,
to keep the user's experience consistent map ABM_LEVEL_IMMEDIATE_DISABLE
to 0 when a user tries to read the requested ABM level.
Cc: stable(a)vger.kernel.org # 6.1+
Reviewed-by: Harry Wentland <harry.wentland(a)amd.com>
Signed-off-by: Hamza Mahfooz <hamza.mahfooz(a)amd.com>
Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com>
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 2be64c593c87..39a4b47b6804 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -6248,7 +6248,7 @@ int amdgpu_dm_connector_atomic_set_property(struct drm_connector *connector,
dm_new_state->underscan_enable = val;
ret = 0;
} else if (property == adev->mode_info.abm_level_property) {
- dm_new_state->abm_level = val;
+ dm_new_state->abm_level = val ?: ABM_LEVEL_IMMEDIATE_DISABLE;
ret = 0;
}
@@ -6293,7 +6293,8 @@ int amdgpu_dm_connector_atomic_get_property(struct drm_connector *connector,
*val = dm_state->underscan_enable;
ret = 0;
} else if (property == adev->mode_info.abm_level_property) {
- *val = dm_state->abm_level;
+ *val = (dm_state->abm_level != ABM_LEVEL_IMMEDIATE_DISABLE) ?
+ dm_state->abm_level : 0;
ret = 0;
}
@@ -6366,7 +6367,8 @@ void amdgpu_dm_connector_funcs_reset(struct drm_connector *connector)
state->pbn = 0;
if (connector->connector_type == DRM_MODE_CONNECTOR_eDP)
- state->abm_level = amdgpu_dm_abm_level;
+ state->abm_level = amdgpu_dm_abm_level ?:
+ ABM_LEVEL_IMMEDIATE_DISABLE;
__drm_atomic_helper_connector_reset(connector, &state->base);
}
The patch below does not apply to the 6.7-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.7.y
git checkout FETCH_HEAD
git cherry-pick -x 7a6931a476d30f0d6bf70b01a925f76f92d23940
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024012719-rebuff-sterling-948d@gregkh' --subject-prefix 'PATCH 6.7.y' HEAD^..
Possible dependencies:
7a6931a476d3 ("drm/amd/display: fix ABM disablement")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 7a6931a476d30f0d6bf70b01a925f76f92d23940 Mon Sep 17 00:00:00 2001
From: Hamza Mahfooz <hamza.mahfooz(a)amd.com>
Date: Wed, 22 Nov 2023 14:50:34 -0500
Subject: [PATCH] drm/amd/display: fix ABM disablement
On recent versions of DMUB firmware, if we want to completely disable
ABM we have to pass ABM_LEVEL_IMMEDIATE_DISABLE as the requested ABM
level to DMUB. Otherwise, LCD eDP displays are unable to reach their
maximum brightness levels. So, to fix this whenever the user requests an
ABM level of 0 pass ABM_LEVEL_IMMEDIATE_DISABLE to DMUB instead. Also,
to keep the user's experience consistent map ABM_LEVEL_IMMEDIATE_DISABLE
to 0 when a user tries to read the requested ABM level.
Cc: stable(a)vger.kernel.org # 6.1+
Reviewed-by: Harry Wentland <harry.wentland(a)amd.com>
Signed-off-by: Hamza Mahfooz <hamza.mahfooz(a)amd.com>
Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com>
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 2be64c593c87..39a4b47b6804 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -6248,7 +6248,7 @@ int amdgpu_dm_connector_atomic_set_property(struct drm_connector *connector,
dm_new_state->underscan_enable = val;
ret = 0;
} else if (property == adev->mode_info.abm_level_property) {
- dm_new_state->abm_level = val;
+ dm_new_state->abm_level = val ?: ABM_LEVEL_IMMEDIATE_DISABLE;
ret = 0;
}
@@ -6293,7 +6293,8 @@ int amdgpu_dm_connector_atomic_get_property(struct drm_connector *connector,
*val = dm_state->underscan_enable;
ret = 0;
} else if (property == adev->mode_info.abm_level_property) {
- *val = dm_state->abm_level;
+ *val = (dm_state->abm_level != ABM_LEVEL_IMMEDIATE_DISABLE) ?
+ dm_state->abm_level : 0;
ret = 0;
}
@@ -6366,7 +6367,8 @@ void amdgpu_dm_connector_funcs_reset(struct drm_connector *connector)
state->pbn = 0;
if (connector->connector_type == DRM_MODE_CONNECTOR_eDP)
- state->abm_level = amdgpu_dm_abm_level;
+ state->abm_level = amdgpu_dm_abm_level ?:
+ ABM_LEVEL_IMMEDIATE_DISABLE;
__drm_atomic_helper_connector_reset(connector, &state->base);
}
The patch below does not apply to the 6.6-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y
git checkout FETCH_HEAD
git cherry-pick -x 4657b3e45683223b5d982ec13a6e2cd367004bb6
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024012745-stingy-busboy-80dc@gregkh' --subject-prefix 'PATCH 6.6.y' HEAD^..
Possible dependencies:
4657b3e45683 ("drm/amdgpu: Restrict extended wait to PSP v13.0.6")
d8c1925ba8cd ("drm/amdgpu: update retry times for psp BL wait")
fc5988907156 ("drm/amdgpu: update retry times for psp vmbx wait")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 4657b3e45683223b5d982ec13a6e2cd367004bb6 Mon Sep 17 00:00:00 2001
From: Lijo Lazar <lijo.lazar(a)amd.com>
Date: Wed, 29 Nov 2023 18:06:55 +0530
Subject: [PATCH] drm/amdgpu: Restrict extended wait to PSP v13.0.6
Only PSPv13.0.6 SOCs take a longer time to reach steady state. Other
PSPv13 based SOCs don't need extended wait. Also, reduce PSPv13.0.6 wait
time.
Cc: stable(a)vger.kernel.org
Fixes: fc5988907156 ("drm/amdgpu: update retry times for psp vmbx wait")
Fixes: d8c1925ba8cd ("drm/amdgpu: update retry times for psp BL wait")
Link: https://lore.kernel.org/amd-gfx/34dd4c66-f7bf-44aa-af8f-c82889dd652c@amd.co…
Signed-off-by: Lijo Lazar <lijo.lazar(a)amd.com>
Reviewed-by: Asad Kamal <asad.kamal(a)amd.com>
Reviewed-by: Mario Limonciello <mario.limonciello(a)amd.com>
Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/psp_v13_0.c b/drivers/gpu/drm/amd/amdgpu/psp_v13_0.c
index 5f46877f78cf..df1844d0800f 100644
--- a/drivers/gpu/drm/amd/amdgpu/psp_v13_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/psp_v13_0.c
@@ -60,7 +60,7 @@ MODULE_FIRMWARE("amdgpu/psp_14_0_0_ta.bin");
#define GFX_CMD_USB_PD_USE_LFB 0x480
/* Retry times for vmbx ready wait */
-#define PSP_VMBX_POLLING_LIMIT 20000
+#define PSP_VMBX_POLLING_LIMIT 3000
/* VBIOS gfl defines */
#define MBOX_READY_MASK 0x80000000
@@ -161,14 +161,18 @@ static int psp_v13_0_wait_for_vmbx_ready(struct psp_context *psp)
static int psp_v13_0_wait_for_bootloader(struct psp_context *psp)
{
struct amdgpu_device *adev = psp->adev;
- int retry_loop, ret;
+ int retry_loop, retry_cnt, ret;
+ retry_cnt =
+ (amdgpu_ip_version(adev, MP0_HWIP, 0) == IP_VERSION(13, 0, 6)) ?
+ PSP_VMBX_POLLING_LIMIT :
+ 10;
/* Wait for bootloader to signify that it is ready having bit 31 of
* C2PMSG_35 set to 1. All other bits are expected to be cleared.
* If there is an error in processing command, bits[7:0] will be set.
* This is applicable for PSP v13.0.6 and newer.
*/
- for (retry_loop = 0; retry_loop < PSP_VMBX_POLLING_LIMIT; retry_loop++) {
+ for (retry_loop = 0; retry_loop < retry_cnt; retry_loop++) {
ret = psp_wait_for(
psp, SOC15_REG_OFFSET(MP0, 0, regMP0_SMN_C2PMSG_35),
0x80000000, 0xffffffff, false);
The patch below does not apply to the 6.7-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.7.y
git checkout FETCH_HEAD
git cherry-pick -x 4657b3e45683223b5d982ec13a6e2cd367004bb6
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024012744-graceless-creamer-0fa6@gregkh' --subject-prefix 'PATCH 6.7.y' HEAD^..
Possible dependencies:
4657b3e45683 ("drm/amdgpu: Restrict extended wait to PSP v13.0.6")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 4657b3e45683223b5d982ec13a6e2cd367004bb6 Mon Sep 17 00:00:00 2001
From: Lijo Lazar <lijo.lazar(a)amd.com>
Date: Wed, 29 Nov 2023 18:06:55 +0530
Subject: [PATCH] drm/amdgpu: Restrict extended wait to PSP v13.0.6
Only PSPv13.0.6 SOCs take a longer time to reach steady state. Other
PSPv13 based SOCs don't need extended wait. Also, reduce PSPv13.0.6 wait
time.
Cc: stable(a)vger.kernel.org
Fixes: fc5988907156 ("drm/amdgpu: update retry times for psp vmbx wait")
Fixes: d8c1925ba8cd ("drm/amdgpu: update retry times for psp BL wait")
Link: https://lore.kernel.org/amd-gfx/34dd4c66-f7bf-44aa-af8f-c82889dd652c@amd.co…
Signed-off-by: Lijo Lazar <lijo.lazar(a)amd.com>
Reviewed-by: Asad Kamal <asad.kamal(a)amd.com>
Reviewed-by: Mario Limonciello <mario.limonciello(a)amd.com>
Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/psp_v13_0.c b/drivers/gpu/drm/amd/amdgpu/psp_v13_0.c
index 5f46877f78cf..df1844d0800f 100644
--- a/drivers/gpu/drm/amd/amdgpu/psp_v13_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/psp_v13_0.c
@@ -60,7 +60,7 @@ MODULE_FIRMWARE("amdgpu/psp_14_0_0_ta.bin");
#define GFX_CMD_USB_PD_USE_LFB 0x480
/* Retry times for vmbx ready wait */
-#define PSP_VMBX_POLLING_LIMIT 20000
+#define PSP_VMBX_POLLING_LIMIT 3000
/* VBIOS gfl defines */
#define MBOX_READY_MASK 0x80000000
@@ -161,14 +161,18 @@ static int psp_v13_0_wait_for_vmbx_ready(struct psp_context *psp)
static int psp_v13_0_wait_for_bootloader(struct psp_context *psp)
{
struct amdgpu_device *adev = psp->adev;
- int retry_loop, ret;
+ int retry_loop, retry_cnt, ret;
+ retry_cnt =
+ (amdgpu_ip_version(adev, MP0_HWIP, 0) == IP_VERSION(13, 0, 6)) ?
+ PSP_VMBX_POLLING_LIMIT :
+ 10;
/* Wait for bootloader to signify that it is ready having bit 31 of
* C2PMSG_35 set to 1. All other bits are expected to be cleared.
* If there is an error in processing command, bits[7:0] will be set.
* This is applicable for PSP v13.0.6 and newer.
*/
- for (retry_loop = 0; retry_loop < PSP_VMBX_POLLING_LIMIT; retry_loop++) {
+ for (retry_loop = 0; retry_loop < retry_cnt; retry_loop++) {
ret = psp_wait_for(
psp, SOC15_REG_OFFSET(MP0, 0, regMP0_SMN_C2PMSG_35),
0x80000000, 0xffffffff, false);
The patch below does not apply to the 6.7-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable(a)vger.kernel.org>.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.7.y
git checkout FETCH_HEAD
git cherry-pick -x a2020be69490ee8778c59a02e7b270dfeecffbd4
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024012714-quaintly-zoom-035c@gregkh' --subject-prefix 'PATCH 6.7.y' HEAD^..
Possible dependencies:
a2020be69490 ("drm/amd/display: Restore guard against default backlight value < 1 nit")
43b8ac4b34ec ("drm/amd/display: Simplify brightness initialization")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From a2020be69490ee8778c59a02e7b270dfeecffbd4 Mon Sep 17 00:00:00 2001
From: Mario Limonciello <mario.limonciello(a)amd.com>
Date: Wed, 6 Dec 2023 12:08:26 -0600
Subject: [PATCH] drm/amd/display: Restore guard against default backlight
value < 1 nit
Mark reports that brightness is not restored after Xorg dpms screen blank.
This behavior was introduced by commit d9e865826c20 ("drm/amd/display:
Simplify brightness initialization") which dropped the cached backlight
value in display code, but also removed code for when the default value
read back was less than 1 nit.
Restore this code so that the backlight brightness is restored to the
correct default value in this circumstance.
Reported-by: Mark Herbert <mark.herbert42(a)gmail.com>
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3031
Cc: stable(a)vger.kernel.org
Cc: Camille Cho <camille.cho(a)amd.com>
Cc: Krunoslav Kovac <krunoslav.kovac(a)amd.com>
Cc: Hamza Mahfooz <hamza.mahfooz(a)amd.com>
Fixes: d9e865826c20 ("drm/amd/display: Simplify brightness initialization")
Acked-by: Alex Deucher <alexander.deucher(a)amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello(a)amd.com>
Signed-off-by: Alex Deucher <alexander.deucher(a)amd.com>
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c
index ac0fa88b52a0..bf53a86ea817 100644
--- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c
@@ -287,8 +287,8 @@ bool set_default_brightness_aux(struct dc_link *link)
if (link && link->dpcd_sink_ext_caps.bits.oled == 1) {
if (!read_default_bl_aux(link, &default_backlight))
default_backlight = 150000;
- // if > 5000, it might be wrong readback
- if (default_backlight > 5000000)
+ // if < 1 nits or > 5000, it might be wrong readback
+ if (default_backlight < 1000 || default_backlight > 5000000)
default_backlight = 150000;
return edp_set_backlight_level_nits(link, true,