[PATCH AUTOSEL 5.9 01/23] drm/tegra: sor: Don't warn on probe deferral

[PATCH AUTOSEL 5.9 01/23] drm/tegra: sor: Don't warn on probe deferral

[Sasha Levin]

From: Jon Hunter <jonathanh@nvidia.com>

[ Upstream commit cb7ff314e1d9f3d6c62fa2c392e41174721ed0b3 ]

Deferred probe is an expected return value for tegra_output_probe().
Given that the driver deals with it properly, there's no need to output
a warning that may potentially confuse users.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/tegra/sor.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/tegra/sor.c b/drivers/gpu/drm/tegra/sor.c
index 45b5258c77a29..5d9a7f008fc6c 100644
--- a/drivers/gpu/drm/tegra/sor.c
+++ b/drivers/gpu/drm/tegra/sor.c
@@ -3759,10 +3759,9 @@ static int tegra_sor_probe(struct platform_device *pdev)
 		return err;
 
 	err = tegra_output_probe(&sor->output);
-	if (err < 0) {
-		dev_err(&pdev->dev, "failed to probe output: %d\n", err);
-		return err;
-	}
+	if (err < 0)
+		return dev_err_probe(&pdev->dev, err,
+				     "failed to probe output\n");
 
 	if (sor->ops && sor->ops->probe) {
 		err = sor->ops->probe(sor);
-- 
2.27.0

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[PATCH AUTOSEL 5.9 02/23] drm/tegra: sor: Ensure regulators are disabled on teardown

[Sasha Levin]

From: Marc Zyngier <maz@kernel.org>

[ Upstream commit 5c1d644c09dbc13b2dc652435786e42b05ac1bb7 ]

The Tegra SOR driver uses the devm infrastructure to request regulators,
but enables them without registering them with the infrastructure.

This results in the following splat if probing fails for any odd resaon
(such as dependencies not being available):

[    8.974187] tegra-sor 15580000.sor: cannot get HDMI supply: -517
[    9.414403] tegra-sor 15580000.sor: failed to probe HDMI: -517
[    9.421240] ------------[ cut here ]------------
[    9.425879] WARNING: CPU: 1 PID: 164 at drivers/regulator/core.c:2089 _regulator_put.part.0+0x16c/0x174
[    9.435259] Modules linked in: tegra_drm(E+) cec(E) ahci_tegra(E) drm_kms_helper(E) drm(E) libahci_platform(E) libahci(E) max77620_regulator(E) xhci_tegra(E+) sdhci_tegra(E) xhci_hcd(E) libata(E) sdhci_pltfm(E) cqhci(E) fixed(E) usbcore(E) scsi_mod(E) sdhci(E) host1x(E)
[    9.459211] CPU: 1 PID: 164 Comm: systemd-udevd Tainted: G S    D W   E     5.9.0-rc7-00298-gf6337624c4fe #1980
[    9.469285] Hardware name: NVIDIA Jetson TX2 Developer Kit (DT)
[    9.475202] pstate: 80000005 (Nzcv daif -PAN -UAO BTYPE=--)
[    9.480784] pc : _regulator_put.part.0+0x16c/0x174
[    9.485581] lr : regulator_put+0x44/0x60
[    9.489501] sp : ffffffc011d837b0
[    9.492814] x29: ffffffc011d837b0 x28: ffffff81dd085900
[    9.498141] x27: ffffff81de1c8ec0 x26: ffffff81de1c8c10
[    9.503464] x25: ffffff81dd085800 x24: ffffffc008f2c6b0
[    9.508790] x23: ffffffc0117373f0 x22: 0000000000000005
[    9.514101] x21: ffffff81dd085900 x20: ffffffc01172b098
[    9.515822] ata1: SATA link down (SStatus 0 SControl 300)
[    9.519426] x19: ffffff81dd085100 x18: 0000000000000030
[    9.530122] x17: 0000000000000000 x16: 0000000000000000
[    9.535453] x15: 0000000000000000 x14: 000000000000038f
[    9.540777] x13: 0000000000000003 x12: 0000000000000040
[    9.546105] x11: ffffff81eb800000 x10: 0000000000000ae0
[    9.551417] x9 : ffffffc0106fea24 x8 : ffffff81de83e6c0
[    9.556728] x7 : 0000000000000018 x6 : 00000000000003c3
[    9.562064] x5 : 0000000000005660 x4 : 0000000000000000
[    9.567392] x3 : ffffffc01172b388 x2 : ffffff81de83db80
[    9.572702] x1 : 0000000000000000 x0 : 0000000000000001
[    9.578034] Call trace:
[    9.580494]  _regulator_put.part.0+0x16c/0x174
[    9.584940]  regulator_put+0x44/0x60
[    9.588522]  devm_regulator_release+0x20/0x2c
[    9.592885]  release_nodes+0x1c8/0x2c0
[    9.596636]  devres_release_all+0x44/0x6c
[    9.600649]  really_probe+0x1ec/0x504
[    9.604316]  driver_probe_device+0x100/0x170
[    9.608589]  device_driver_attach+0xcc/0xd4
[    9.612774]  __driver_attach+0xb0/0x17c
[    9.616614]  bus_for_each_dev+0x7c/0xd4
[    9.620450]  driver_attach+0x30/0x3c
[    9.624027]  bus_add_driver+0x154/0x250
[    9.627867]  driver_register+0x84/0x140
[    9.631719]  __platform_register_drivers+0xa0/0x180
[    9.636660]  host1x_drm_init+0x60/0x1000 [tegra_drm]
[    9.641629]  do_one_initcall+0x54/0x2d0
[    9.645490]  do_init_module+0x68/0x29c
[    9.649244]  load_module+0x2178/0x26c0
[    9.652997]  __do_sys_finit_module+0xb0/0x120
[    9.657356]  __arm64_sys_finit_module+0x2c/0x40
[    9.661902]  el0_svc_common.constprop.0+0x80/0x240
[    9.666701]  do_el0_svc+0x30/0xa0
[    9.670022]  el0_svc+0x18/0x50
[    9.673081]  el0_sync_handler+0x90/0x318
[    9.677006]  el0_sync+0x158/0x180
[    9.680324] ---[ end trace 90f6c89d62d85ff6 ]---

Instead, let's register a callback that will disable the regulators
on teardown. This allows for the removal of the .remove callbacks,
which are not needed anymore.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/tegra/sor.c | 59 +++++++++++++++----------------------
 1 file changed, 24 insertions(+), 35 deletions(-)

diff --git a/drivers/gpu/drm/tegra/sor.c b/drivers/gpu/drm/tegra/sor.c
index 5d9a7f008fc6c..f2a114f14a3db 100644
--- a/drivers/gpu/drm/tegra/sor.c
+++ b/drivers/gpu/drm/tegra/sor.c
@@ -397,7 +397,6 @@ struct tegra_sor;
 struct tegra_sor_ops {
 	const char *name;
 	int (*probe)(struct tegra_sor *sor);
-	int (*remove)(struct tegra_sor *sor);
 	void (*audio_enable)(struct tegra_sor *sor);
 	void (*audio_disable)(struct tegra_sor *sor);
 };
@@ -2942,6 +2941,24 @@ static const struct drm_encoder_helper_funcs tegra_sor_dp_helpers = {
 	.atomic_check = tegra_sor_encoder_atomic_check,
 };
 
+static void tegra_sor_disable_regulator(void *data)
+{
+	struct regulator *reg = data;
+
+	regulator_disable(reg);
+}
+
+static int tegra_sor_enable_regulator(struct tegra_sor *sor, struct regulator *reg)
+{
+	int err;
+
+	err = regulator_enable(reg);
+	if (err)
+		return err;
+
+	return devm_add_action_or_reset(sor->dev, tegra_sor_disable_regulator, reg);
+}
+
 static int tegra_sor_hdmi_probe(struct tegra_sor *sor)
 {
 	int err;
@@ -2953,7 +2970,7 @@ static int tegra_sor_hdmi_probe(struct tegra_sor *sor)
 		return PTR_ERR(sor->avdd_io_supply);
 	}
 
-	err = regulator_enable(sor->avdd_io_supply);
+	err = tegra_sor_enable_regulator(sor, sor->avdd_io_supply);
 	if (err < 0) {
 		dev_err(sor->dev, "failed to enable AVDD I/O supply: %d\n",
 			err);
@@ -2967,7 +2984,7 @@ static int tegra_sor_hdmi_probe(struct tegra_sor *sor)
 		return PTR_ERR(sor->vdd_pll_supply);
 	}
 
-	err = regulator_enable(sor->vdd_pll_supply);
+	err = tegra_sor_enable_regulator(sor, sor->vdd_pll_supply);
 	if (err < 0) {
 		dev_err(sor->dev, "failed to enable VDD PLL supply: %d\n",
 			err);
@@ -2981,7 +2998,7 @@ static int tegra_sor_hdmi_probe(struct tegra_sor *sor)
 		return PTR_ERR(sor->hdmi_supply);
 	}
 
-	err = regulator_enable(sor->hdmi_supply);
+	err = tegra_sor_enable_regulator(sor, sor->hdmi_supply);
 	if (err < 0) {
 		dev_err(sor->dev, "failed to enable HDMI supply: %d\n", err);
 		return err;
@@ -2992,19 +3009,9 @@ static int tegra_sor_hdmi_probe(struct tegra_sor *sor)
 	return 0;
 }
 
-static int tegra_sor_hdmi_remove(struct tegra_sor *sor)
-{
-	regulator_disable(sor->hdmi_supply);
-	regulator_disable(sor->vdd_pll_supply);
-	regulator_disable(sor->avdd_io_supply);
-
-	return 0;
-}
-
 static const struct tegra_sor_ops tegra_sor_hdmi_ops = {
 	.name = "HDMI",
 	.probe = tegra_sor_hdmi_probe,
-	.remove = tegra_sor_hdmi_remove,
 	.audio_enable = tegra_sor_hdmi_audio_enable,
 	.audio_disable = tegra_sor_hdmi_audio_disable,
 };
@@ -3017,7 +3024,7 @@ static int tegra_sor_dp_probe(struct tegra_sor *sor)
 	if (IS_ERR(sor->avdd_io_supply))
 		return PTR_ERR(sor->avdd_io_supply);
 
-	err = regulator_enable(sor->avdd_io_supply);
+	err = tegra_sor_enable_regulator(sor, sor->avdd_io_supply);
 	if (err < 0)
 		return err;
 
@@ -3025,25 +3032,16 @@ static int tegra_sor_dp_probe(struct tegra_sor *sor)
 	if (IS_ERR(sor->vdd_pll_supply))
 		return PTR_ERR(sor->vdd_pll_supply);
 
-	err = regulator_enable(sor->vdd_pll_supply);
+	err = tegra_sor_enable_regulator(sor, sor->vdd_pll_supply);
 	if (err < 0)
 		return err;
 
 	return 0;
 }
 
-static int tegra_sor_dp_remove(struct tegra_sor *sor)
-{
-	regulator_disable(sor->vdd_pll_supply);
-	regulator_disable(sor->avdd_io_supply);
-
-	return 0;
-}
-
 static const struct tegra_sor_ops tegra_sor_dp_ops = {
 	.name = "DP",
 	.probe = tegra_sor_dp_probe,
-	.remove = tegra_sor_dp_remove,
 };
 
 static int tegra_sor_init(struct host1x_client *client)
@@ -3768,7 +3766,7 @@ static int tegra_sor_probe(struct platform_device *pdev)
 		if (err < 0) {
 			dev_err(&pdev->dev, "failed to probe %s: %d\n",
 				sor->ops->name, err);
-			goto output;
+			goto remove;
 		}
 	}
 
@@ -3949,9 +3947,6 @@ unregister:
 rpm_disable:
 	pm_runtime_disable(&pdev->dev);
 remove:
-	if (sor->ops && sor->ops->remove)
-		sor->ops->remove(sor);
-output:
 	tegra_output_remove(&sor->output);
 	return err;
 }
@@ -3970,12 +3965,6 @@ static int tegra_sor_remove(struct platform_device *pdev)
 
 	pm_runtime_disable(&pdev->dev);
 
-	if (sor->ops && sor->ops->remove) {
-		err = sor->ops->remove(sor);
-		if (err < 0)
-			dev_err(&pdev->dev, "failed to remove SOR: %d\n", err);
-	}
-
 	tegra_output_remove(&sor->output);
 
 	return 0;
-- 
2.27.0

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[PATCH AUTOSEL 5.9 03/23] drm/tegra: replace idr_init() by idr_init_base()

[Sasha Levin]

From: Deepak R Varma <mh12gx2825@gmail.com>

[ Upstream commit 41f71629b4c432f8dd47d70ace813be5f79d4d75 ]

idr_init() uses base 0 which is an invalid identifier for this driver.
The new function idr_init_base allows IDR to set the ID lookup from
base 1. This avoids all lookups that otherwise starts from 0 since
0 is always unused.

References: commit 6ce711f27500 ("idr: Make 1-based IDRs more efficient")

Signed-off-by: Deepak R Varma <mh12gx2825@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/tegra/drm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
index ba9d1c3e7cacf..e4baf07992a4d 100644
--- a/drivers/gpu/drm/tegra/drm.c
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -90,7 +90,7 @@ static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
 	if (!fpriv)
 		return -ENOMEM;
 
-	idr_init(&fpriv->contexts);
+	idr_init_base(&fpriv->contexts, 1);
 	mutex_init(&fpriv->lock);
 	filp->driver_priv = fpriv;
 
-- 
2.27.0

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[PATCH AUTOSEL 5.9 08/23] drm/tegra: sor: Disable clocks on error in tegra_sor_init()

[Sasha Levin]

From: Qinglang Miao <miaoqinglang@huawei.com>

[ Upstream commit bf3a3cdcad40e5928a22ea0fd200d17fd6d6308d ]

Fix the missing clk_disable_unprepare() before return from
tegra_sor_init() in the error handling case.

Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/tegra/sor.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/tegra/sor.c b/drivers/gpu/drm/tegra/sor.c
index f2a114f14a3db..b83a46df00584 100644
--- a/drivers/gpu/drm/tegra/sor.c
+++ b/drivers/gpu/drm/tegra/sor.c
@@ -3143,6 +3143,7 @@ static int tegra_sor_init(struct host1x_client *client)
 		if (err < 0) {
 			dev_err(sor->dev, "failed to deassert SOR reset: %d\n",
 				err);
+			clk_disable_unprepare(sor->clk);
 			return err;
 		}
 
@@ -3150,12 +3151,17 @@ static int tegra_sor_init(struct host1x_client *client)
 	}
 
 	err = clk_prepare_enable(sor->clk_safe);
-	if (err < 0)
+	if (err < 0) {
+		clk_disable_unprepare(sor->clk);
 		return err;
+	}
 
 	err = clk_prepare_enable(sor->clk_dp);
-	if (err < 0)
+	if (err < 0) {
+		clk_disable_unprepare(sor->clk_safe);
+		clk_disable_unprepare(sor->clk);
 		return err;
+	}
 
 	return 0;
 }
-- 
2.27.0

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[PATCH AUTOSEL 5.9 20/23] drm/amd/display: Init clock value by current vbios CLKs

[Sasha Levin]

From: Brandon Syu <Brandon.Syu@amd.com>

[ Upstream commit 7e0b367db85ef7b91399006253759a024eab7653 ]

[Why]
While booting into OS, driver updates DPP/DISP CLKs.
But init clock value is zero which is invalid.

[How]
Get current clocks value to update init clocks.
To avoid underflow.

Signed-off-by: Brandon Syu <Brandon.Syu@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>
---
 .../drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c   | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c
index 2f8fee05547ac..c001307b0a59a 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c
@@ -163,8 +163,17 @@ void rn_update_clocks(struct clk_mgr *clk_mgr_base,
 			new_clocks->dppclk_khz = 100000;
 	}
 
-	if (should_set_clock(safe_to_lower, new_clocks->dppclk_khz, clk_mgr->base.clks.dppclk_khz)) {
-		if (clk_mgr->base.clks.dppclk_khz > new_clocks->dppclk_khz)
+	/*
+	 * Temporally ignore thew 0 cases for disp and dpp clks.
+	 * We may have a new feature that requires 0 clks in the future.
+	 */
+	if (new_clocks->dppclk_khz == 0 || new_clocks->dispclk_khz == 0) {
+		new_clocks->dppclk_khz = clk_mgr_base->clks.dppclk_khz;
+		new_clocks->dispclk_khz = clk_mgr_base->clks.dispclk_khz;
+	}
+
+	if (should_set_clock(safe_to_lower, new_clocks->dppclk_khz, clk_mgr_base->clks.dppclk_khz)) {
+		if (clk_mgr_base->clks.dppclk_khz > new_clocks->dppclk_khz)
 			dpp_clock_lowered = true;
 		clk_mgr_base->clks.dppclk_khz = new_clocks->dppclk_khz;
 		update_dppclk = true;
-- 
2.27.0

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