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* [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible
@ 2021-09-24  6:43 Fernando Ramos
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 01/17] drm: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN() Fernando Ramos
                   ` (17 more replies)
  0 siblings, 18 replies; 29+ messages in thread
From: Fernando Ramos @ 2021-09-24  6:43 UTC (permalink / raw)
  To: dri-devel
  Cc: linux-kernel, sean, linux-doc, amd-gfx, intel-gfx, linux-arm-msm,
	freedreno, nouveau, linux-renesas-soc, linux-tegra

Hi all,

One of the things in the DRM TODO list ("Documentation/gpu/todo.rst") was to
"use DRM_MODESET_LOCAL_ALL_* helpers instead of boilerplate". That's what this
patch series is about.

You will find two types of changes here:

  - Replacing "drm_modeset_lock_all_ctx()" (and surrounding boilerplate) with
    "DRM_MODESET_LOCK_ALL_BEGIN()/END()" in the remaining places (as it has
    already been done in previous commits such as b7ea04d2)

  - Replacing "drm_modeset_lock_all()" with "DRM_MODESET_LOCK_ALL_BEGIN()/END()"
    in the remaining places (as it has already been done in previous commits
    such as 57037094)
    
Most of the changes are straight forward, except for a few cases in the "amd"
and "i915" drivers where some extra dancing was needed to overcome the
limitation that the DRM_MODESET_LOCK_ALL_BEGIN()/END() macros can only be used
once inside the same function (the reason being that the macro expansion
includes *labels*, and you can not have two labels named the same inside one
function)

Notice that, even after this patch series, some places remain where
"drm_modeset_lock_all()" and "drm_modeset_lock_all_ctx()" are still present,
all inside drm core (which makes sense), except for two (in "amd" and "i915")
which cannot be replaced due to the way they are being used.

Changes in v2:

  - Fix commit message typo
  - Use the value returned by DRM_MODESET_LOCK_ALL_END when possible
  - Split drm/i915 patch into two simpler ones
  - Remove drm_modeset_(un)lock_all()
  - Fix build problems in non-x86 platforms

Fernando Ramos (17):
  drm: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm/i915: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm/msm: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() drm/vmwgfx: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm/tegra: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm/shmobile: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm/radeon: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm/omapdrm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm/nouveau: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm/msm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm/i915: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm/i915: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() part 2
  drm/gma500: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm/amd: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  drm: cleanup: remove drm_modeset_(un)lock_all()
  doc: drm: remove TODO entry regarding DRM_MODSET_LOCK_ALL cleanup

 Documentation/gpu/todo.rst                    | 17 ----
 Documentation/locking/ww-mutex-design.rst     |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_display.c   | 21 +++--
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 50 +++++-----
 .../amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 25 ++---
 drivers/gpu/drm/drm_client_modeset.c          | 14 ++-
 drivers/gpu/drm/drm_crtc_helper.c             | 18 ++--
 drivers/gpu/drm/drm_fb_helper.c               | 10 +-
 drivers/gpu/drm/drm_framebuffer.c             |  6 +-
 drivers/gpu/drm/drm_modeset_lock.c            | 94 +------------------
 drivers/gpu/drm/gma500/psb_device.c           | 18 ++--
 drivers/gpu/drm/i915/display/intel_audio.c    | 16 ++--
 drivers/gpu/drm/i915/display/intel_display.c  | 23 ++---
 .../drm/i915/display/intel_display_debugfs.c  | 46 +++++----
 drivers/gpu/drm/i915/display/intel_overlay.c  | 46 ++++-----
 drivers/gpu/drm/i915/display/intel_pipe_crc.c |  7 +-
 drivers/gpu/drm/i915/i915_drv.c               | 13 ++-
 drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c      | 10 +-
 .../gpu/drm/msm/disp/msm_disp_snapshot_util.c | 12 +--
 drivers/gpu/drm/nouveau/dispnv50/disp.c       | 15 ++-
 drivers/gpu/drm/omapdrm/omap_fb.c             |  9 +-
 drivers/gpu/drm/radeon/radeon_device.c        | 21 +++--
 drivers/gpu/drm/radeon/radeon_dp_mst.c        | 10 +-
 drivers/gpu/drm/shmobile/shmob_drm_drv.c      |  6 +-
 drivers/gpu/drm/tegra/dsi.c                   |  6 +-
 drivers/gpu/drm/tegra/hdmi.c                  |  6 +-
 drivers/gpu/drm/tegra/sor.c                   | 11 ++-
 drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c         | 11 ++-
 drivers/gpu/drm/vmwgfx/vmwgfx_kms.c           | 12 ++-
 include/drm/drm_modeset_lock.h                |  2 -
 30 files changed, 265 insertions(+), 292 deletions(-)


base-commit: 6880fa6c56601bb8ed59df6c30fd390cc5f6dd8f
-- 
2.33.0


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [Nouveau] [PATCH v2 01/17] drm: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()
  2021-09-24  6:43 [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible Fernando Ramos
@ 2021-09-24  6:43 ` Fernando Ramos
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 02/17] drm/i915: " Fernando Ramos
                   ` (16 subsequent siblings)
  17 siblings, 0 replies; 29+ messages in thread
From: Fernando Ramos @ 2021-09-24  6:43 UTC (permalink / raw)
  To: dri-devel
  Cc: linux-kernel, sean, linux-doc, amd-gfx, intel-gfx, linux-arm-msm,
	freedreno, nouveau, linux-renesas-soc, linux-tegra

As requested in Documentation/gpu/todo.rst, replace the boilerplate code
surrounding drm_modeset_lock_all_ctx() with DRM_MODESET_LOCK_ALL_BEGIN()
and DRM_MODESET_LOCK_ALL_END()

Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
---
 drivers/gpu/drm/drm_client_modeset.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/drm_client_modeset.c b/drivers/gpu/drm/drm_client_modeset.c
index ced09c7c06f9..5f5184f071ed 100644
--- a/drivers/gpu/drm/drm_client_modeset.c
+++ b/drivers/gpu/drm/drm_client_modeset.c
@@ -574,6 +574,7 @@ static bool drm_client_firmware_config(struct drm_client_dev *client,
 	int num_connectors_detected = 0;
 	int num_tiled_conns = 0;
 	struct drm_modeset_acquire_ctx ctx;
+	int err;
 
 	if (!drm_drv_uses_atomic_modeset(dev))
 		return false;
@@ -585,10 +586,7 @@ static bool drm_client_firmware_config(struct drm_client_dev *client,
 	if (!save_enabled)
 		return false;
 
-	drm_modeset_acquire_init(&ctx, 0);
-
-	while (drm_modeset_lock_all_ctx(dev, &ctx) != 0)
-		drm_modeset_backoff(&ctx);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, err);
 
 	memcpy(save_enabled, enabled, count);
 	mask = GENMASK(count - 1, 0);
@@ -743,8 +741,7 @@ static bool drm_client_firmware_config(struct drm_client_dev *client,
 		ret = false;
 	}
 
-	drm_modeset_drop_locks(&ctx);
-	drm_modeset_acquire_fini(&ctx);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, err);
 
 	kfree(save_enabled);
 	return ret;
-- 
2.33.0


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [Nouveau] [PATCH v2 02/17] drm/i915: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()
  2021-09-24  6:43 [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible Fernando Ramos
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 01/17] drm: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN() Fernando Ramos
@ 2021-09-24  6:43 ` Fernando Ramos
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 03/17] drm/msm: " Fernando Ramos
                   ` (15 subsequent siblings)
  17 siblings, 0 replies; 29+ messages in thread
From: Fernando Ramos @ 2021-09-24  6:43 UTC (permalink / raw)
  To: dri-devel
  Cc: linux-kernel, sean, linux-doc, amd-gfx, intel-gfx, linux-arm-msm,
	freedreno, nouveau, linux-renesas-soc, linux-tegra

As requested in Documentation/gpu/todo.rst, replace the boilerplate code
surrounding drm_modeset_lock_all_ctx() with DRM_MODESET_LOCK_ALL_BEGIN()
and DRM_MODESET_LOCK_ALL_END()

Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
Reviewed-by: Sean Paul <sean@poorly.run>
---
 drivers/gpu/drm/i915/display/intel_display.c | 18 +++++-------------
 1 file changed, 5 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 134a6acbd8fb..2bf01416d656 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -43,6 +43,7 @@
 #include <drm/drm_plane_helper.h>
 #include <drm/drm_probe_helper.h>
 #include <drm/drm_rect.h>
+#include <drm/drm_drv.h>
 
 #include "display/intel_audio.h"
 #include "display/intel_crt.h"
@@ -13476,22 +13477,13 @@ void intel_display_resume(struct drm_device *dev)
 	if (state)
 		state->acquire_ctx = &ctx;
 
-	drm_modeset_acquire_init(&ctx, 0);
-
-	while (1) {
-		ret = drm_modeset_lock_all_ctx(dev, &ctx);
-		if (ret != -EDEADLK)
-			break;
-
-		drm_modeset_backoff(&ctx);
-	}
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 
-	if (!ret)
-		ret = __intel_display_resume(dev, state, &ctx);
+	ret = __intel_display_resume(dev, state, &ctx);
 
 	intel_enable_ipc(dev_priv);
-	drm_modeset_drop_locks(&ctx);
-	drm_modeset_acquire_fini(&ctx);
+
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 
 	if (ret)
 		drm_err(&dev_priv->drm,
-- 
2.33.0


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [Nouveau] [PATCH v2 03/17] drm/msm: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()
  2021-09-24  6:43 [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible Fernando Ramos
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 01/17] drm: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN() Fernando Ramos
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 02/17] drm/i915: " Fernando Ramos
@ 2021-09-24  6:43 ` Fernando Ramos
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 04/17] drm: cleanup: drm_modeset_lock_all() " Fernando Ramos
                   ` (14 subsequent siblings)
  17 siblings, 0 replies; 29+ messages in thread
From: Fernando Ramos @ 2021-09-24  6:43 UTC (permalink / raw)
  To: dri-devel
  Cc: linux-kernel, sean, linux-doc, amd-gfx, intel-gfx, linux-arm-msm,
	freedreno, nouveau, linux-renesas-soc, linux-tegra

As requested in Documentation/gpu/todo.rst, replace the boilerplate code
surrounding drm_modeset_lock_all_ctx() with DRM_MODESET_LOCK_ALL_BEGIN()
and DRM_MODESET_LOCK_ALL_END()

Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
Reviewed-by: Sean Paul <sean@poorly.run>
Reported-by: kernel test robot <lkp@intel.com>
---
 drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c b/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c
index cabe15190ec1..abda52f09b09 100644
--- a/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c
+++ b/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c
@@ -5,6 +5,8 @@
 
 #define pr_fmt(fmt)	"[drm:%s:%d] " fmt, __func__, __LINE__
 
+#include <drm/drm_drv.h>
+
 #include "msm_disp_snapshot.h"
 
 static void msm_disp_state_dump_regs(u32 **reg, u32 aligned_len, void __iomem *base_addr)
@@ -99,20 +101,18 @@ static void msm_disp_capture_atomic_state(struct msm_disp_state *disp_state)
 {
 	struct drm_device *ddev;
 	struct drm_modeset_acquire_ctx ctx;
+	int ret;
 
 	disp_state->timestamp = ktime_get();
 
 	ddev = disp_state->drm_dev;
 
-	drm_modeset_acquire_init(&ctx, 0);
-
-	while (drm_modeset_lock_all_ctx(ddev, &ctx) != 0)
-		drm_modeset_backoff(&ctx);
+	DRM_MODESET_LOCK_ALL_BEGIN(ddev, ctx, 0, ret);
 
 	disp_state->atomic_state = drm_atomic_helper_duplicate_state(ddev,
 			&ctx);
-	drm_modeset_drop_locks(&ctx);
-	drm_modeset_acquire_fini(&ctx);
+
+	DRM_MODESET_LOCK_ALL_END(ddev, ctx, ret);
 }
 
 void msm_disp_snapshot_capture_state(struct msm_disp_state *disp_state)
-- 
2.33.0


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [Nouveau] [PATCH v2 04/17] drm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  2021-09-24  6:43 [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible Fernando Ramos
                   ` (2 preceding siblings ...)
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 03/17] drm/msm: " Fernando Ramos
@ 2021-09-24  6:43 ` Fernando Ramos
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 05/17] drm/vmwgfx: " Fernando Ramos
                   ` (13 subsequent siblings)
  17 siblings, 0 replies; 29+ messages in thread
From: Fernando Ramos @ 2021-09-24  6:43 UTC (permalink / raw)
  To: dri-devel
  Cc: linux-kernel, sean, linux-doc, amd-gfx, intel-gfx, linux-arm-msm,
	freedreno, nouveau, linux-renesas-soc, linux-tegra

As requested in Documentation/gpu/todo.rst, replace driver calls to
drm_modeset_lock_all() with DRM_MODESET_LOCK_ALL_BEGIN() and
DRM_MODESET_LOCK_ALL_END()

Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
Reviewed-by: Sean Paul <sean@poorly.run>
---
 drivers/gpu/drm/drm_client_modeset.c |  5 +++--
 drivers/gpu/drm/drm_crtc_helper.c    | 18 ++++++++++++------
 drivers/gpu/drm/drm_fb_helper.c      | 10 ++++++----
 drivers/gpu/drm/drm_framebuffer.c    |  6 ++++--
 4 files changed, 25 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/drm_client_modeset.c b/drivers/gpu/drm/drm_client_modeset.c
index 5f5184f071ed..43f772543d2a 100644
--- a/drivers/gpu/drm/drm_client_modeset.c
+++ b/drivers/gpu/drm/drm_client_modeset.c
@@ -1062,9 +1062,10 @@ static int drm_client_modeset_commit_legacy(struct drm_client_dev *client)
 	struct drm_device *dev = client->dev;
 	struct drm_mode_set *mode_set;
 	struct drm_plane *plane;
+	struct drm_modeset_acquire_ctx ctx;
 	int ret = 0;
 
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 	drm_for_each_plane(plane, dev) {
 		if (plane->type != DRM_PLANE_TYPE_PRIMARY)
 			drm_plane_force_disable(plane);
@@ -1093,7 +1094,7 @@ static int drm_client_modeset_commit_legacy(struct drm_client_dev *client)
 			goto out;
 	}
 out:
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 
 	return ret;
 }
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index bff917531f33..f3ce073dff79 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -218,11 +218,14 @@ static void __drm_helper_disable_unused_functions(struct drm_device *dev)
  */
 void drm_helper_disable_unused_functions(struct drm_device *dev)
 {
+	struct drm_modeset_acquire_ctx ctx;
+	int ret;
+
 	WARN_ON(drm_drv_uses_atomic_modeset(dev));
 
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 	__drm_helper_disable_unused_functions(dev);
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 }
 EXPORT_SYMBOL(drm_helper_disable_unused_functions);
 
@@ -942,12 +945,14 @@ void drm_helper_resume_force_mode(struct drm_device *dev)
 	struct drm_crtc *crtc;
 	struct drm_encoder *encoder;
 	const struct drm_crtc_helper_funcs *crtc_funcs;
+	struct drm_modeset_acquire_ctx ctx;
 	int encoder_dpms;
 	bool ret;
+	int err;
 
 	WARN_ON(drm_drv_uses_atomic_modeset(dev));
 
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, err);
 	drm_for_each_crtc(crtc, dev) {
 
 		if (!crtc->enabled)
@@ -982,7 +987,7 @@ void drm_helper_resume_force_mode(struct drm_device *dev)
 
 	/* disable the unused connectors while restoring the modesetting */
 	__drm_helper_disable_unused_functions(dev);
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, err);
 }
 EXPORT_SYMBOL(drm_helper_resume_force_mode);
 
@@ -1002,9 +1007,10 @@ EXPORT_SYMBOL(drm_helper_resume_force_mode);
 int drm_helper_force_disable_all(struct drm_device *dev)
 {
 	struct drm_crtc *crtc;
+	struct drm_modeset_acquire_ctx ctx;
 	int ret = 0;
 
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 	drm_for_each_crtc(crtc, dev)
 		if (crtc->enabled) {
 			struct drm_mode_set set = {
@@ -1016,7 +1022,7 @@ int drm_helper_force_disable_all(struct drm_device *dev)
 				goto out;
 		}
 out:
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 	return ret;
 }
 EXPORT_SYMBOL(drm_helper_force_disable_all);
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 3ab078321045..6860223f0068 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -940,10 +940,11 @@ static int setcmap_legacy(struct fb_cmap *cmap, struct fb_info *info)
 	struct drm_fb_helper *fb_helper = info->par;
 	struct drm_mode_set *modeset;
 	struct drm_crtc *crtc;
+	struct drm_modeset_acquire_ctx ctx;
 	u16 *r, *g, *b;
 	int ret = 0;
 
-	drm_modeset_lock_all(fb_helper->dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(fb_helper->dev, ctx, 0, ret);
 	drm_client_for_each_modeset(modeset, &fb_helper->client) {
 		crtc = modeset->crtc;
 		if (!crtc->funcs->gamma_set || !crtc->gamma_size) {
@@ -970,7 +971,7 @@ static int setcmap_legacy(struct fb_cmap *cmap, struct fb_info *info)
 			goto out;
 	}
 out:
-	drm_modeset_unlock_all(fb_helper->dev);
+	DRM_MODESET_LOCK_ALL_END(fb_helper->dev, ctx, ret);
 
 	return ret;
 }
@@ -1441,10 +1442,11 @@ static int pan_display_legacy(struct fb_var_screeninfo *var,
 	struct drm_fb_helper *fb_helper = info->par;
 	struct drm_client_dev *client = &fb_helper->client;
 	struct drm_mode_set *modeset;
+	struct drm_modeset_acquire_ctx ctx;
 	int ret = 0;
 
 	mutex_lock(&client->modeset_mutex);
-	drm_modeset_lock_all(fb_helper->dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(fb_helper->dev, ctx, 0, ret);
 	drm_client_for_each_modeset(modeset, client) {
 		modeset->x = var->xoffset;
 		modeset->y = var->yoffset;
@@ -1457,7 +1459,7 @@ static int pan_display_legacy(struct fb_var_screeninfo *var,
 			}
 		}
 	}
-	drm_modeset_unlock_all(fb_helper->dev);
+	DRM_MODESET_LOCK_ALL_END(fb_helper->dev, ctx, ret);
 	mutex_unlock(&client->modeset_mutex);
 
 	return ret;
diff --git a/drivers/gpu/drm/drm_framebuffer.c b/drivers/gpu/drm/drm_framebuffer.c
index 07f5abc875e9..205e9aa9a409 100644
--- a/drivers/gpu/drm/drm_framebuffer.c
+++ b/drivers/gpu/drm/drm_framebuffer.c
@@ -1059,8 +1059,10 @@ static void legacy_remove_fb(struct drm_framebuffer *fb)
 	struct drm_device *dev = fb->dev;
 	struct drm_crtc *crtc;
 	struct drm_plane *plane;
+	struct drm_modeset_acquire_ctx ctx;
+	int ret;
 
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 	/* remove from any CRTC */
 	drm_for_each_crtc(crtc, dev) {
 		if (crtc->primary->fb == fb) {
@@ -1082,7 +1084,7 @@ static void legacy_remove_fb(struct drm_framebuffer *fb)
 			drm_plane_force_disable(plane);
 		}
 	}
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 }
 
 /**
-- 
2.33.0


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [Nouveau] [PATCH v2 05/17] drm/vmwgfx: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  2021-09-24  6:43 [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible Fernando Ramos
                   ` (3 preceding siblings ...)
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 04/17] drm: cleanup: drm_modeset_lock_all() " Fernando Ramos
@ 2021-09-24  6:43 ` Fernando Ramos
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 06/17] drm/tegra: " Fernando Ramos
                   ` (12 subsequent siblings)
  17 siblings, 0 replies; 29+ messages in thread
From: Fernando Ramos @ 2021-09-24  6:43 UTC (permalink / raw)
  To: dri-devel
  Cc: linux-kernel, sean, linux-doc, amd-gfx, intel-gfx, linux-arm-msm,
	freedreno, nouveau, linux-renesas-soc, linux-tegra

As requested in Documentation/gpu/todo.rst, replace driver calls to
drm_modeset_lock_all() with DRM_MODESET_LOCK_ALL_BEGIN() and
DRM_MODESET_LOCK_ALL_END()

Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
Reviewed-by: Sean Paul <sean@poorly.run>
---
 drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c | 11 +++++++----
 drivers/gpu/drm/vmwgfx/vmwgfx_kms.c   | 12 ++++++++----
 2 files changed, 15 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c b/drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c
index 28af34ab6ed6..7df35c6f1458 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c
@@ -28,6 +28,7 @@
 #include "vmwgfx_drv.h"
 #include "vmwgfx_devcaps.h"
 #include <drm/vmwgfx_drm.h>
+#include <drm/drm_drv.h>
 #include "vmwgfx_kms.h"
 
 int vmw_getparam_ioctl(struct drm_device *dev, void *data,
@@ -172,6 +173,7 @@ int vmw_present_ioctl(struct drm_device *dev, void *data,
 	struct drm_vmw_rect __user *clips_ptr;
 	struct drm_vmw_rect *clips = NULL;
 	struct drm_framebuffer *fb;
+	struct drm_modeset_acquire_ctx ctx;
 	struct vmw_framebuffer *vfb;
 	struct vmw_resource *res;
 	uint32_t num_clips;
@@ -203,7 +205,7 @@ int vmw_present_ioctl(struct drm_device *dev, void *data,
 		goto out_no_copy;
 	}
 
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 
 	fb = drm_framebuffer_lookup(dev, file_priv, arg->fb_id);
 	if (!fb) {
@@ -231,7 +233,7 @@ int vmw_present_ioctl(struct drm_device *dev, void *data,
 out_no_surface:
 	drm_framebuffer_put(fb);
 out_no_fb:
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 out_no_copy:
 	kfree(clips);
 out_clips:
@@ -250,6 +252,7 @@ int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
 	struct drm_vmw_rect __user *clips_ptr;
 	struct drm_vmw_rect *clips = NULL;
 	struct drm_framebuffer *fb;
+	struct drm_modeset_acquire_ctx ctx;
 	struct vmw_framebuffer *vfb;
 	uint32_t num_clips;
 	int ret;
@@ -280,7 +283,7 @@ int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
 		goto out_no_copy;
 	}
 
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 
 	fb = drm_framebuffer_lookup(dev, file_priv, arg->fb_id);
 	if (!fb) {
@@ -303,7 +306,7 @@ int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
 out_no_ttm_lock:
 	drm_framebuffer_put(fb);
 out_no_fb:
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 out_no_copy:
 	kfree(clips);
 out_clips:
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index 74fa41909213..268095cb8c84 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -33,6 +33,7 @@
 #include <drm/drm_rect.h>
 #include <drm/drm_sysfs.h>
 #include <drm/drm_vblank.h>
+#include <drm/drm_drv.h>
 
 #include "vmwgfx_kms.h"
 
@@ -243,15 +244,17 @@ void vmw_kms_legacy_hotspot_clear(struct vmw_private *dev_priv)
 	struct drm_device *dev = &dev_priv->drm;
 	struct vmw_display_unit *du;
 	struct drm_crtc *crtc;
+	struct drm_modeset_acquire_ctx ctx;
+	int ret;
 
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 	drm_for_each_crtc(crtc, dev) {
 		du = vmw_crtc_to_du(crtc);
 
 		du->hotspot_x = 0;
 		du->hotspot_y = 0;
 	}
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 }
 
 void vmw_kms_cursor_post_execbuf(struct vmw_private *dev_priv)
@@ -1012,9 +1015,10 @@ static int vmw_framebuffer_bo_dirty(struct drm_framebuffer *framebuffer,
 	struct vmw_framebuffer_bo *vfbd =
 		vmw_framebuffer_to_vfbd(framebuffer);
 	struct drm_clip_rect norect;
+	struct drm_modeset_acquire_ctx ctx;
 	int ret, increment = 1;
 
-	drm_modeset_lock_all(&dev_priv->drm);
+	DRM_MODESET_LOCK_ALL_BEGIN((&dev_priv->drm), ctx, 0, ret);
 
 	if (!num_clips) {
 		num_clips = 1;
@@ -1040,7 +1044,7 @@ static int vmw_framebuffer_bo_dirty(struct drm_framebuffer *framebuffer,
 
 	vmw_cmd_flush(dev_priv, false);
 
-	drm_modeset_unlock_all(&dev_priv->drm);
+	DRM_MODESET_LOCK_ALL_END((&dev_priv->drm), ctx, ret);
 
 	return ret;
 }
-- 
2.33.0


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [Nouveau] [PATCH v2 06/17] drm/tegra: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  2021-09-24  6:43 [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible Fernando Ramos
                   ` (4 preceding siblings ...)
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 05/17] drm/vmwgfx: " Fernando Ramos
@ 2021-09-24  6:43 ` Fernando Ramos
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 07/17] drm/shmobile: " Fernando Ramos
                   ` (11 subsequent siblings)
  17 siblings, 0 replies; 29+ messages in thread
From: Fernando Ramos @ 2021-09-24  6:43 UTC (permalink / raw)
  To: dri-devel
  Cc: linux-kernel, sean, linux-doc, amd-gfx, intel-gfx, linux-arm-msm,
	freedreno, nouveau, linux-renesas-soc, linux-tegra

As requested in Documentation/gpu/todo.rst, replace driver calls to
drm_modeset_lock_all() with DRM_MODESET_LOCK_ALL_BEGIN() and
DRM_MODESET_LOCK_ALL_END()

Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
Reviewed-by: Sean Paul <sean@poorly.run>
Reported-by: kernel test robot <lkp@intel.com>
---
 drivers/gpu/drm/tegra/dsi.c  |  6 ++++--
 drivers/gpu/drm/tegra/hdmi.c |  6 ++++--
 drivers/gpu/drm/tegra/sor.c  | 11 +++++++----
 3 files changed, 15 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c
index f46d377f0c30..28050c188c1c 100644
--- a/drivers/gpu/drm/tegra/dsi.c
+++ b/drivers/gpu/drm/tegra/dsi.c
@@ -23,6 +23,7 @@
 #include <drm/drm_mipi_dsi.h>
 #include <drm/drm_panel.h>
 #include <drm/drm_simple_kms_helper.h>
+#include <drm/drm_drv.h>
 
 #include "dc.h"
 #include "drm.h"
@@ -202,10 +203,11 @@ static int tegra_dsi_show_regs(struct seq_file *s, void *data)
 	struct tegra_dsi *dsi = node->info_ent->data;
 	struct drm_crtc *crtc = dsi->output.encoder.crtc;
 	struct drm_device *drm = node->minor->dev;
+	struct drm_modeset_acquire_ctx ctx;
 	unsigned int i;
 	int err = 0;
 
-	drm_modeset_lock_all(drm);
+	DRM_MODESET_LOCK_ALL_BEGIN(drm, ctx, 0, err);
 
 	if (!crtc || !crtc->state->active) {
 		err = -EBUSY;
@@ -220,7 +222,7 @@ static int tegra_dsi_show_regs(struct seq_file *s, void *data)
 	}
 
 unlock:
-	drm_modeset_unlock_all(drm);
+	DRM_MODESET_LOCK_ALL_END(drm, ctx, err);
 	return err;
 }
 
diff --git a/drivers/gpu/drm/tegra/hdmi.c b/drivers/gpu/drm/tegra/hdmi.c
index e5d2a4026028..a62de7f92414 100644
--- a/drivers/gpu/drm/tegra/hdmi.c
+++ b/drivers/gpu/drm/tegra/hdmi.c
@@ -22,6 +22,7 @@
 #include <drm/drm_fourcc.h>
 #include <drm/drm_probe_helper.h>
 #include <drm/drm_simple_kms_helper.h>
+#include <drm/drm_drv.h>
 
 #include "hda.h"
 #include "hdmi.h"
@@ -1031,10 +1032,11 @@ static int tegra_hdmi_show_regs(struct seq_file *s, void *data)
 	struct tegra_hdmi *hdmi = node->info_ent->data;
 	struct drm_crtc *crtc = hdmi->output.encoder.crtc;
 	struct drm_device *drm = node->minor->dev;
+	struct drm_modeset_acquire_ctx ctx;
 	unsigned int i;
 	int err = 0;
 
-	drm_modeset_lock_all(drm);
+	DRM_MODESET_LOCK_ALL_BEGIN(drm, ctx, 0, err);
 
 	if (!crtc || !crtc->state->active) {
 		err = -EBUSY;
@@ -1049,7 +1051,7 @@ static int tegra_hdmi_show_regs(struct seq_file *s, void *data)
 	}
 
 unlock:
-	drm_modeset_unlock_all(drm);
+	DRM_MODESET_LOCK_ALL_END(drm, ctx, err);
 	return err;
 }
 
diff --git a/drivers/gpu/drm/tegra/sor.c b/drivers/gpu/drm/tegra/sor.c
index 0ea320c1092b..3d1c8b3d1358 100644
--- a/drivers/gpu/drm/tegra/sor.c
+++ b/drivers/gpu/drm/tegra/sor.c
@@ -23,6 +23,7 @@
 #include <drm/drm_panel.h>
 #include <drm/drm_scdc_helper.h>
 #include <drm/drm_simple_kms_helper.h>
+#include <drm/drm_drv.h>
 
 #include "dc.h"
 #include "dp.h"
@@ -1490,10 +1491,11 @@ static int tegra_sor_show_crc(struct seq_file *s, void *data)
 	struct tegra_sor *sor = node->info_ent->data;
 	struct drm_crtc *crtc = sor->output.encoder.crtc;
 	struct drm_device *drm = node->minor->dev;
+	struct drm_modeset_acquire_ctx ctx;
 	int err = 0;
 	u32 value;
 
-	drm_modeset_lock_all(drm);
+	DRM_MODESET_LOCK_ALL_BEGIN(drm, ctx, 0, err);
 
 	if (!crtc || !crtc->state->active) {
 		err = -EBUSY;
@@ -1522,7 +1524,7 @@ static int tegra_sor_show_crc(struct seq_file *s, void *data)
 	seq_printf(s, "%08x\n", value);
 
 unlock:
-	drm_modeset_unlock_all(drm);
+	DRM_MODESET_LOCK_ALL_END(drm, ctx, err);
 	return err;
 }
 
@@ -1652,10 +1654,11 @@ static int tegra_sor_show_regs(struct seq_file *s, void *data)
 	struct tegra_sor *sor = node->info_ent->data;
 	struct drm_crtc *crtc = sor->output.encoder.crtc;
 	struct drm_device *drm = node->minor->dev;
+	struct drm_modeset_acquire_ctx ctx;
 	unsigned int i;
 	int err = 0;
 
-	drm_modeset_lock_all(drm);
+	DRM_MODESET_LOCK_ALL_BEGIN(drm, ctx, 0, err);
 
 	if (!crtc || !crtc->state->active) {
 		err = -EBUSY;
@@ -1670,7 +1673,7 @@ static int tegra_sor_show_regs(struct seq_file *s, void *data)
 	}
 
 unlock:
-	drm_modeset_unlock_all(drm);
+	DRM_MODESET_LOCK_ALL_END(drm, ctx, err);
 	return err;
 }
 
-- 
2.33.0


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [Nouveau] [PATCH v2 07/17] drm/shmobile: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  2021-09-24  6:43 [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible Fernando Ramos
                   ` (5 preceding siblings ...)
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 06/17] drm/tegra: " Fernando Ramos
@ 2021-09-24  6:43 ` Fernando Ramos
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 08/17] drm/radeon: " Fernando Ramos
                   ` (10 subsequent siblings)
  17 siblings, 0 replies; 29+ messages in thread
From: Fernando Ramos @ 2021-09-24  6:43 UTC (permalink / raw)
  To: dri-devel
  Cc: linux-kernel, sean, linux-doc, amd-gfx, intel-gfx, linux-arm-msm,
	freedreno, nouveau, linux-renesas-soc, linux-tegra

As requested in Documentation/gpu/todo.rst, replace driver calls to
drm_modeset_lock_all() with DRM_MODESET_LOCK_ALL_BEGIN() and
DRM_MODESET_LOCK_ALL_END()

Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
Reviewed-by: Sean Paul <sean@poorly.run>
---
 drivers/gpu/drm/shmobile/shmob_drm_drv.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/shmobile/shmob_drm_drv.c b/drivers/gpu/drm/shmobile/shmob_drm_drv.c
index 7db01904d18d..8ee215ab614e 100644
--- a/drivers/gpu/drm/shmobile/shmob_drm_drv.c
+++ b/drivers/gpu/drm/shmobile/shmob_drm_drv.c
@@ -156,10 +156,12 @@ static int shmob_drm_pm_suspend(struct device *dev)
 static int shmob_drm_pm_resume(struct device *dev)
 {
 	struct shmob_drm_device *sdev = dev_get_drvdata(dev);
+	struct drm_modeset_acquire_ctx ctx;
+	int ret;
 
-	drm_modeset_lock_all(sdev->ddev);
+	DRM_MODESET_LOCK_ALL_BEGIN(sdev->ddev, ctx, 0, ret);
 	shmob_drm_crtc_resume(&sdev->crtc);
-	drm_modeset_unlock_all(sdev->ddev);
+	DRM_MODESET_LOCK_ALL_END(sdev->ddev, ctx, ret);
 
 	drm_kms_helper_poll_enable(sdev->ddev);
 	return 0;
-- 
2.33.0


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [Nouveau] [PATCH v2 08/17] drm/radeon: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  2021-09-24  6:43 [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible Fernando Ramos
                   ` (6 preceding siblings ...)
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 07/17] drm/shmobile: " Fernando Ramos
@ 2021-09-24  6:43 ` Fernando Ramos
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 09/17] drm/omapdrm: " Fernando Ramos
                   ` (9 subsequent siblings)
  17 siblings, 0 replies; 29+ messages in thread
From: Fernando Ramos @ 2021-09-24  6:43 UTC (permalink / raw)
  To: dri-devel
  Cc: linux-kernel, sean, linux-doc, amd-gfx, intel-gfx, linux-arm-msm,
	freedreno, nouveau, linux-renesas-soc, linux-tegra

As requested in Documentation/gpu/todo.rst, replace driver calls to
drm_modeset_lock_all() with DRM_MODESET_LOCK_ALL_BEGIN() and
DRM_MODESET_LOCK_ALL_END()

Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
---
 drivers/gpu/drm/radeon/radeon_device.c | 21 +++++++++++++++------
 drivers/gpu/drm/radeon/radeon_dp_mst.c | 10 ++++++----
 2 files changed, 21 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index 4f0fbf667431..7e31e5ce7f61 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -37,6 +37,7 @@
 #include <drm/drm_cache.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_device.h>
+#include <drm/drm_drv.h>
 #include <drm/drm_file.h>
 #include <drm/drm_probe_helper.h>
 #include <drm/radeon_drm.h>
@@ -1559,7 +1560,8 @@ int radeon_suspend_kms(struct drm_device *dev, bool suspend,
 	struct pci_dev *pdev;
 	struct drm_crtc *crtc;
 	struct drm_connector *connector;
-	int i, r;
+	struct drm_modeset_acquire_ctx ctx;
+	int i, r, ret;
 
 	if (dev == NULL || dev->dev_private == NULL) {
 		return -ENODEV;
@@ -1573,12 +1575,15 @@ int radeon_suspend_kms(struct drm_device *dev, bool suspend,
 
 	drm_kms_helper_poll_disable(dev);
 
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 	/* turn off display hw */
 	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 		drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
 	}
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
+
+	if (ret)
+		return ret;
 
 	/* unpin the front buffers and cursors */
 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
@@ -1663,7 +1668,8 @@ int radeon_resume_kms(struct drm_device *dev, bool resume, bool fbcon)
 	struct radeon_device *rdev = dev->dev_private;
 	struct pci_dev *pdev = to_pci_dev(dev->dev);
 	struct drm_crtc *crtc;
-	int r;
+	struct drm_modeset_acquire_ctx ctx;
+	int r, ret;
 
 	if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 		return 0;
@@ -1741,11 +1747,14 @@ int radeon_resume_kms(struct drm_device *dev, bool resume, bool fbcon)
 	if (fbcon) {
 		drm_helper_resume_force_mode(dev);
 		/* turn on display hw */
-		drm_modeset_lock_all(dev);
+		DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 		list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 			drm_helper_connector_dpms(connector, DRM_MODE_DPMS_ON);
 		}
-		drm_modeset_unlock_all(dev);
+		DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
+
+		if (ret)
+			return ret;
 	}
 
 	drm_kms_helper_poll_enable(dev);
diff --git a/drivers/gpu/drm/radeon/radeon_dp_mst.c b/drivers/gpu/drm/radeon/radeon_dp_mst.c
index ec867fa880a4..3f83ee75b100 100644
--- a/drivers/gpu/drm/radeon/radeon_dp_mst.c
+++ b/drivers/gpu/drm/radeon/radeon_dp_mst.c
@@ -4,6 +4,7 @@
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_file.h>
 #include <drm/drm_probe_helper.h>
+#include <drm/drm_drv.h>
 
 #include "atom.h"
 #include "ni_reg.h"
@@ -737,11 +738,12 @@ static int radeon_debugfs_mst_info_show(struct seq_file *m, void *unused)
 	struct radeon_device *rdev = (struct radeon_device *)m->private;
 	struct drm_device *dev = rdev->ddev;
 	struct drm_connector *connector;
+	struct drm_modeset_acquire_ctx ctx;
 	struct radeon_connector *radeon_connector;
 	struct radeon_connector_atom_dig *dig_connector;
-	int i;
+	int i, ret;
 
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 		if (connector->connector_type != DRM_MODE_CONNECTOR_DisplayPort)
 			continue;
@@ -759,8 +761,8 @@ static int radeon_debugfs_mst_info_show(struct seq_file *m, void *unused)
 				   radeon_connector->cur_stream_attribs[i].fe,
 				   radeon_connector->cur_stream_attribs[i].slots);
 	}
-	drm_modeset_unlock_all(dev);
-	return 0;
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
+	return ret;
 }
 
 DEFINE_SHOW_ATTRIBUTE(radeon_debugfs_mst_info);
-- 
2.33.0


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [Nouveau] [PATCH v2 09/17] drm/omapdrm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  2021-09-24  6:43 [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible Fernando Ramos
                   ` (7 preceding siblings ...)
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 08/17] drm/radeon: " Fernando Ramos
@ 2021-09-24  6:43 ` Fernando Ramos
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 10/17] drm/nouveau: " Fernando Ramos
                   ` (8 subsequent siblings)
  17 siblings, 0 replies; 29+ messages in thread
From: Fernando Ramos @ 2021-09-24  6:43 UTC (permalink / raw)
  To: dri-devel
  Cc: linux-kernel, sean, linux-doc, amd-gfx, intel-gfx, linux-arm-msm,
	freedreno, nouveau, linux-renesas-soc, linux-tegra

As requested in Documentation/gpu/todo.rst, replace driver calls to
drm_modeset_lock_all() with DRM_MODESET_LOCK_ALL_BEGIN() and
DRM_MODESET_LOCK_ALL_END()

Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
Reviewed-by: Sean Paul <sean@poorly.run>
---
 drivers/gpu/drm/omapdrm/omap_fb.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/omap_fb.c b/drivers/gpu/drm/omapdrm/omap_fb.c
index 190afc564914..fa7636c13c19 100644
--- a/drivers/gpu/drm/omapdrm/omap_fb.c
+++ b/drivers/gpu/drm/omapdrm/omap_fb.c
@@ -9,6 +9,7 @@
 #include <drm/drm_modeset_helper.h>
 #include <drm/drm_fourcc.h>
 #include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_drv.h>
 
 #include "omap_dmm_tiler.h"
 #include "omap_drv.h"
@@ -62,15 +63,17 @@ static int omap_framebuffer_dirty(struct drm_framebuffer *fb,
 				  unsigned num_clips)
 {
 	struct drm_crtc *crtc;
+	struct drm_modeset_acquire_ctx ctx;
+	int ret;
 
-	drm_modeset_lock_all(fb->dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(fb->dev, ctx, 0, ret);
 
 	drm_for_each_crtc(crtc, fb->dev)
 		omap_crtc_flush(crtc);
 
-	drm_modeset_unlock_all(fb->dev);
+	DRM_MODESET_LOCK_ALL_END(fb->dev, ctx, ret);
 
-	return 0;
+	return ret;
 }
 
 static const struct drm_framebuffer_funcs omap_framebuffer_funcs = {
-- 
2.33.0


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [Nouveau] [PATCH v2 10/17] drm/nouveau: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  2021-09-24  6:43 [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible Fernando Ramos
                   ` (8 preceding siblings ...)
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 09/17] drm/omapdrm: " Fernando Ramos
@ 2021-09-24  6:43 ` Fernando Ramos
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 11/17] drm/msm: " Fernando Ramos
                   ` (7 subsequent siblings)
  17 siblings, 0 replies; 29+ messages in thread
From: Fernando Ramos @ 2021-09-24  6:43 UTC (permalink / raw)
  To: dri-devel
  Cc: linux-kernel, sean, linux-doc, amd-gfx, intel-gfx, linux-arm-msm,
	freedreno, nouveau, linux-renesas-soc, linux-tegra

As requested in Documentation/gpu/todo.rst, replace driver calls to
drm_modeset_lock_all() with DRM_MODESET_LOCK_ALL_BEGIN() and
DRM_MODESET_LOCK_ALL_END()

Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
Reviewed-by: Sean Paul <sean@poorly.run>
---
 drivers/gpu/drm/nouveau/dispnv50/disp.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
index d7b9f7f8c9e3..86e18a844953 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -42,6 +42,7 @@
 #include <drm/drm_probe_helper.h>
 #include <drm/drm_scdc_helper.h>
 #include <drm/drm_vblank.h>
+#include <drm/drm_drv.h>
 
 #include <nvif/push507c.h>
 
@@ -667,16 +668,18 @@ nv50_audio_component_bind(struct device *kdev, struct device *hda_kdev,
 	struct drm_device *drm_dev = dev_get_drvdata(kdev);
 	struct nouveau_drm *drm = nouveau_drm(drm_dev);
 	struct drm_audio_component *acomp = data;
+	struct drm_modeset_acquire_ctx ctx;
+	int ret;
 
 	if (WARN_ON(!device_link_add(hda_kdev, kdev, DL_FLAG_STATELESS)))
 		return -ENOMEM;
 
-	drm_modeset_lock_all(drm_dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(drm_dev, ctx, 0, ret);
 	acomp->ops = &nv50_audio_component_ops;
 	acomp->dev = kdev;
 	drm->audio.component = acomp;
-	drm_modeset_unlock_all(drm_dev);
-	return 0;
+	DRM_MODESET_LOCK_ALL_END(drm_dev, ctx, ret);
+	return ret;
 }
 
 static void
@@ -686,12 +689,14 @@ nv50_audio_component_unbind(struct device *kdev, struct device *hda_kdev,
 	struct drm_device *drm_dev = dev_get_drvdata(kdev);
 	struct nouveau_drm *drm = nouveau_drm(drm_dev);
 	struct drm_audio_component *acomp = data;
+	struct drm_modeset_acquire_ctx ctx;
+	int ret;
 
-	drm_modeset_lock_all(drm_dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(drm_dev, ctx, 0, ret);
 	drm->audio.component = NULL;
 	acomp->ops = NULL;
 	acomp->dev = NULL;
-	drm_modeset_unlock_all(drm_dev);
+	DRM_MODESET_LOCK_ALL_END(drm_dev, ctx, ret);
 }
 
 static const struct component_ops nv50_audio_component_bind_ops = {
-- 
2.33.0


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [Nouveau] [PATCH v2 11/17] drm/msm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  2021-09-24  6:43 [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible Fernando Ramos
                   ` (9 preceding siblings ...)
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 10/17] drm/nouveau: " Fernando Ramos
@ 2021-09-24  6:43 ` Fernando Ramos
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 12/17] drm/i915: " Fernando Ramos
                   ` (6 subsequent siblings)
  17 siblings, 0 replies; 29+ messages in thread
From: Fernando Ramos @ 2021-09-24  6:43 UTC (permalink / raw)
  To: dri-devel
  Cc: linux-kernel, sean, linux-doc, amd-gfx, intel-gfx, linux-arm-msm,
	freedreno, nouveau, linux-renesas-soc, linux-tegra

As requested in Documentation/gpu/todo.rst, replace driver calls to
drm_modeset_lock_all() with DRM_MODESET_LOCK_ALL_BEGIN() and
DRM_MODESET_LOCK_ALL_END()

Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index 768012243b44..b89687074890 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -18,6 +18,7 @@
 #include <drm/drm_probe_helper.h>
 #include <drm/drm_rect.h>
 #include <drm/drm_vblank.h>
+#include <drm/drm_drv.h>
 
 #include "dpu_kms.h"
 #include "dpu_hw_lm.h"
@@ -1172,14 +1173,15 @@ static int _dpu_debugfs_status_show(struct seq_file *s, void *data)
 	struct drm_display_mode *mode;
 	struct drm_framebuffer *fb;
 	struct drm_plane_state *state;
+	struct drm_modeset_acquire_ctx ctx;
 	struct dpu_crtc_state *cstate;
 
-	int i, out_width;
+	int i, out_width, ret;
 
 	dpu_crtc = s->private;
 	crtc = &dpu_crtc->base;
 
-	drm_modeset_lock_all(crtc->dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(crtc->dev, ctx, 0, ret);
 	cstate = to_dpu_crtc_state(crtc->state);
 
 	mode = &crtc->state->adjusted_mode;
@@ -1263,9 +1265,9 @@ static int _dpu_debugfs_status_show(struct seq_file *s, void *data)
 		dpu_crtc->vblank_cb_time = ktime_set(0, 0);
 	}
 
-	drm_modeset_unlock_all(crtc->dev);
+	DRM_MODESET_LOCK_ALL_END(crtc->dev, ctx, ret);
 
-	return 0;
+	return ret;
 }
 
 DEFINE_SHOW_ATTRIBUTE(_dpu_debugfs_status);
-- 
2.33.0


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [Nouveau] [PATCH v2 12/17] drm/i915: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  2021-09-24  6:43 [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible Fernando Ramos
                   ` (10 preceding siblings ...)
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 11/17] drm/msm: " Fernando Ramos
@ 2021-09-24  6:43 ` Fernando Ramos
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 13/17] drm/i915: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() part 2 Fernando Ramos
                   ` (5 subsequent siblings)
  17 siblings, 0 replies; 29+ messages in thread
From: Fernando Ramos @ 2021-09-24  6:43 UTC (permalink / raw)
  To: dri-devel
  Cc: linux-kernel, sean, linux-doc, amd-gfx, intel-gfx, linux-arm-msm,
	freedreno, nouveau, linux-renesas-soc, linux-tegra

As requested in Documentation/gpu/todo.rst, replace driver calls to
drm_modeset_lock_all() with DRM_MODESET_LOCK_ALL_BEGIN() and
DRM_MODESET_LOCK_ALL_END()

Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
---
 drivers/gpu/drm/i915/display/intel_audio.c    | 16 ++++---
 drivers/gpu/drm/i915/display/intel_display.c  |  5 +-
 .../drm/i915/display/intel_display_debugfs.c  | 46 ++++++++++++-------
 drivers/gpu/drm/i915/display/intel_overlay.c  |  6 ++-
 drivers/gpu/drm/i915/display/intel_pipe_crc.c |  7 ++-
 drivers/gpu/drm/i915/i915_drv.c               | 13 ++++--
 6 files changed, 61 insertions(+), 32 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_audio.c b/drivers/gpu/drm/i915/display/intel_audio.c
index 532237588511..c64f738cc062 100644
--- a/drivers/gpu/drm/i915/display/intel_audio.c
+++ b/drivers/gpu/drm/i915/display/intel_audio.c
@@ -26,6 +26,7 @@
 
 #include <drm/drm_edid.h>
 #include <drm/i915_component.h>
+#include <drm/drm_drv.h>
 
 #include "i915_drv.h"
 #include "intel_atomic.h"
@@ -1214,7 +1215,8 @@ static int i915_audio_component_bind(struct device *i915_kdev,
 {
 	struct i915_audio_component *acomp = data;
 	struct drm_i915_private *dev_priv = kdev_to_i915(i915_kdev);
-	int i;
+	struct drm_modeset_acquire_ctx ctx;
+	int i, ret;
 
 	if (drm_WARN_ON(&dev_priv->drm, acomp->base.ops || acomp->base.dev))
 		return -EEXIST;
@@ -1224,16 +1226,16 @@ static int i915_audio_component_bind(struct device *i915_kdev,
 					 DL_FLAG_STATELESS)))
 		return -ENOMEM;
 
-	drm_modeset_lock_all(&dev_priv->drm);
+	DRM_MODESET_LOCK_ALL_BEGIN((&dev_priv->drm), ctx, 0, ret);
 	acomp->base.ops = &i915_audio_component_ops;
 	acomp->base.dev = i915_kdev;
 	BUILD_BUG_ON(MAX_PORTS != I915_MAX_PORTS);
 	for (i = 0; i < ARRAY_SIZE(acomp->aud_sample_rate); i++)
 		acomp->aud_sample_rate[i] = 0;
 	dev_priv->audio_component = acomp;
-	drm_modeset_unlock_all(&dev_priv->drm);
+	DRM_MODESET_LOCK_ALL_END((&dev_priv->drm), ctx, ret);
 
-	return 0;
+	return ret;
 }
 
 static void i915_audio_component_unbind(struct device *i915_kdev,
@@ -1241,12 +1243,14 @@ static void i915_audio_component_unbind(struct device *i915_kdev,
 {
 	struct i915_audio_component *acomp = data;
 	struct drm_i915_private *dev_priv = kdev_to_i915(i915_kdev);
+	struct drm_modeset_acquire_ctx ctx;
+	int ret;
 
-	drm_modeset_lock_all(&dev_priv->drm);
+	DRM_MODESET_LOCK_ALL_BEGIN((&dev_priv->drm), ctx, 0, ret);
 	acomp->base.ops = NULL;
 	acomp->base.dev = NULL;
 	dev_priv->audio_component = NULL;
-	drm_modeset_unlock_all(&dev_priv->drm);
+	DRM_MODESET_LOCK_ALL_END((&dev_priv->drm), ctx, ret);
 
 	device_link_remove(hda_kdev, i915_kdev);
 
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 2bf01416d656..297359411c5f 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -12512,6 +12512,7 @@ int intel_modeset_init_noirq(struct drm_i915_private *i915)
 int intel_modeset_init_nogem(struct drm_i915_private *i915)
 {
 	struct drm_device *dev = &i915->drm;
+	struct drm_modeset_acquire_ctx ctx;
 	enum pipe pipe;
 	struct intel_crtc *crtc;
 	int ret;
@@ -12563,9 +12564,9 @@ int intel_modeset_init_nogem(struct drm_i915_private *i915)
 	intel_vga_disable(i915);
 	intel_setup_outputs(i915);
 
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 	intel_modeset_setup_hw_state(dev, dev->mode_config.acquire_ctx);
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 
 	for_each_intel_crtc(dev, crtc) {
 		struct intel_initial_plane_config plane_config = {};
diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
index 8fdacb252bb1..e0a6837996e7 100644
--- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
+++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
@@ -5,6 +5,7 @@
 
 #include <drm/drm_debugfs.h>
 #include <drm/drm_fourcc.h>
+#include <drm/drm_drv.h>
 
 #include "i915_debugfs.h"
 #include "intel_display_debugfs.h"
@@ -1057,11 +1058,13 @@ static int i915_display_info(struct seq_file *m, void *unused)
 	struct intel_crtc *crtc;
 	struct drm_connector *connector;
 	struct drm_connector_list_iter conn_iter;
+	struct drm_modeset_acquire_ctx ctx;
 	intel_wakeref_t wakeref;
+	int ret;
 
 	wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm);
 
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 
 	seq_printf(m, "CRTC info\n");
 	seq_printf(m, "---------\n");
@@ -1076,20 +1079,21 @@ static int i915_display_info(struct seq_file *m, void *unused)
 		intel_connector_info(m, connector);
 	drm_connector_list_iter_end(&conn_iter);
 
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 
 	intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
 
-	return 0;
+	return ret;
 }
 
 static int i915_shared_dplls_info(struct seq_file *m, void *unused)
 {
 	struct drm_i915_private *dev_priv = node_to_i915(m->private);
 	struct drm_device *dev = &dev_priv->drm;
-	int i;
+	struct drm_modeset_acquire_ctx ctx;
+	int i, ret;
 
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 
 	seq_printf(m, "PLL refclks: non-SSC: %d kHz, SSC: %d kHz\n",
 		   dev_priv->dpll.ref_clks.nssc,
@@ -1132,9 +1136,9 @@ static int i915_shared_dplls_info(struct seq_file *m, void *unused)
 		seq_printf(m, " mg_pll_tdc_coldst_bias: 0x%08x\n",
 			   pll->state.hw_state.mg_pll_tdc_coldst_bias);
 	}
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 
-	return 0;
+	return ret;
 }
 
 static int i915_ipc_status_show(struct seq_file *m, void *data)
@@ -1193,13 +1197,15 @@ static int i915_ddb_info(struct seq_file *m, void *unused)
 {
 	struct drm_i915_private *dev_priv = node_to_i915(m->private);
 	struct drm_device *dev = &dev_priv->drm;
+	struct drm_modeset_acquire_ctx ctx;
 	struct skl_ddb_entry *entry;
 	struct intel_crtc *crtc;
+	int ret;
 
 	if (DISPLAY_VER(dev_priv) < 9)
 		return -ENODEV;
 
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 
 	seq_printf(m, "%-15s%8s%8s%8s\n", "", "Start", "End", "Size");
 
@@ -1223,9 +1229,9 @@ static int i915_ddb_info(struct seq_file *m, void *unused)
 			   entry->end, skl_ddb_entry_size(entry));
 	}
 
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 
-	return 0;
+	return ret;
 }
 
 static void drrs_status_per_crtc(struct seq_file *m,
@@ -1303,10 +1309,12 @@ static int i915_drrs_status(struct seq_file *m, void *unused)
 {
 	struct drm_i915_private *dev_priv = node_to_i915(m->private);
 	struct drm_device *dev = &dev_priv->drm;
+	struct drm_modeset_acquire_ctx ctx;
 	struct intel_crtc *crtc;
 	int active_crtc_cnt = 0;
+	int ret;
 
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 	for_each_intel_crtc(dev, crtc) {
 		if (crtc->base.state->active) {
 			active_crtc_cnt++;
@@ -1315,7 +1323,7 @@ static int i915_drrs_status(struct seq_file *m, void *unused)
 			drrs_status_per_crtc(m, dev, crtc);
 		}
 	}
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 
 	if (!active_crtc_cnt)
 		seq_puts(m, "No active crtc found\n");
@@ -1607,8 +1615,10 @@ static void wm_latency_show(struct seq_file *m, const u16 wm[8])
 {
 	struct drm_i915_private *dev_priv = m->private;
 	struct drm_device *dev = &dev_priv->drm;
+	struct drm_modeset_acquire_ctx ctx;
 	int level;
 	int num_levels;
+	int ret;
 
 	if (IS_CHERRYVIEW(dev_priv))
 		num_levels = 3;
@@ -1619,7 +1629,7 @@ static void wm_latency_show(struct seq_file *m, const u16 wm[8])
 	else
 		num_levels = ilk_wm_max_level(dev_priv) + 1;
 
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 
 	for (level = 0; level < num_levels; level++) {
 		unsigned int latency = wm[level];
@@ -1640,7 +1650,7 @@ static void wm_latency_show(struct seq_file *m, const u16 wm[8])
 			   level, wm[level], latency / 10, latency % 10);
 	}
 
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 }
 
 static int pri_wm_latency_show(struct seq_file *m, void *data)
@@ -1724,6 +1734,7 @@ static ssize_t wm_latency_write(struct file *file, const char __user *ubuf,
 	struct seq_file *m = file->private_data;
 	struct drm_i915_private *dev_priv = m->private;
 	struct drm_device *dev = &dev_priv->drm;
+	struct drm_modeset_acquire_ctx ctx;
 	u16 new[8] = { 0 };
 	int num_levels;
 	int level;
@@ -1753,12 +1764,15 @@ static ssize_t wm_latency_write(struct file *file, const char __user *ubuf,
 	if (ret != num_levels)
 		return -EINVAL;
 
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 
 	for (level = 0; level < num_levels; level++)
 		wm[level] = new[level];
 
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
+
+	if (ret)
+		return ret;
 
 	return len;
 }
diff --git a/drivers/gpu/drm/i915/display/intel_overlay.c b/drivers/gpu/drm/i915/display/intel_overlay.c
index 7e3f5c6ca484..c0ee135e5499 100644
--- a/drivers/gpu/drm/i915/display/intel_overlay.c
+++ b/drivers/gpu/drm/i915/display/intel_overlay.c
@@ -27,6 +27,7 @@
  */
 
 #include <drm/drm_fourcc.h>
+#include <drm/drm_drv.h>
 
 #include "gem/i915_gem_pm.h"
 #include "gt/intel_gpu_commands.h"
@@ -1263,6 +1264,7 @@ int intel_overlay_attrs_ioctl(struct drm_device *dev, void *data,
 {
 	struct drm_intel_overlay_attrs *attrs = data;
 	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct drm_modeset_acquire_ctx ctx;
 	struct intel_overlay *overlay;
 	int ret;
 
@@ -1272,7 +1274,7 @@ int intel_overlay_attrs_ioctl(struct drm_device *dev, void *data,
 		return -ENODEV;
 	}
 
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 
 	ret = -EINVAL;
 	if (!(attrs->flags & I915_OVERLAY_UPDATE_ATTRS)) {
@@ -1329,7 +1331,7 @@ int intel_overlay_attrs_ioctl(struct drm_device *dev, void *data,
 
 	ret = 0;
 out_unlock:
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 
 	return ret;
 }
diff --git a/drivers/gpu/drm/i915/display/intel_pipe_crc.c b/drivers/gpu/drm/i915/display/intel_pipe_crc.c
index 8ac263f471be..d0bc74904b93 100644
--- a/drivers/gpu/drm/i915/display/intel_pipe_crc.c
+++ b/drivers/gpu/drm/i915/display/intel_pipe_crc.c
@@ -29,6 +29,8 @@
 #include <linux/debugfs.h>
 #include <linux/seq_file.h>
 
+#include <drm/drm_drv.h>
+
 #include "intel_atomic.h"
 #include "intel_de.h"
 #include "intel_display_types.h"
@@ -76,6 +78,7 @@ static int i9xx_pipe_crc_auto_source(struct drm_i915_private *dev_priv,
 				     enum intel_pipe_crc_source *source)
 {
 	struct drm_device *dev = &dev_priv->drm;
+	struct drm_modeset_acquire_ctx ctx;
 	struct intel_encoder *encoder;
 	struct intel_crtc *crtc;
 	struct intel_digital_port *dig_port;
@@ -83,7 +86,7 @@ static int i9xx_pipe_crc_auto_source(struct drm_i915_private *dev_priv,
 
 	*source = INTEL_PIPE_CRC_SOURCE_PIPE;
 
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 	for_each_intel_encoder(dev, encoder) {
 		if (!encoder->base.crtc)
 			continue;
@@ -120,7 +123,7 @@ static int i9xx_pipe_crc_auto_source(struct drm_i915_private *dev_priv,
 			break;
 		}
 	}
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 
 	return ret;
 }
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 59fb4c710c8c..e7b763ca6d10 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -44,6 +44,7 @@
 #include <drm/drm_ioctl.h>
 #include <drm/drm_managed.h>
 #include <drm/drm_probe_helper.h>
+#include <drm/drm_drv.h>
 
 #include "display/intel_acpi.h"
 #include "display/intel_bw.h"
@@ -1009,31 +1010,35 @@ static void i915_driver_postclose(struct drm_device *dev, struct drm_file *file)
 static void intel_suspend_encoders(struct drm_i915_private *dev_priv)
 {
 	struct drm_device *dev = &dev_priv->drm;
+	struct drm_modeset_acquire_ctx ctx;
 	struct intel_encoder *encoder;
+	int ret;
 
 	if (!HAS_DISPLAY(dev_priv))
 		return;
 
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 	for_each_intel_encoder(dev, encoder)
 		if (encoder->suspend)
 			encoder->suspend(encoder);
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 }
 
 static void intel_shutdown_encoders(struct drm_i915_private *dev_priv)
 {
 	struct drm_device *dev = &dev_priv->drm;
+	struct drm_modeset_acquire_ctx ctx;
 	struct intel_encoder *encoder;
+	int ret;
 
 	if (!HAS_DISPLAY(dev_priv))
 		return;
 
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 	for_each_intel_encoder(dev, encoder)
 		if (encoder->shutdown)
 			encoder->shutdown(encoder);
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 }
 
 void i915_driver_shutdown(struct drm_i915_private *i915)
-- 
2.33.0


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [Nouveau] [PATCH v2 13/17] drm/i915: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() part 2
  2021-09-24  6:43 [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible Fernando Ramos
                   ` (11 preceding siblings ...)
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 12/17] drm/i915: " Fernando Ramos
@ 2021-09-24  6:43 ` Fernando Ramos
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 14/17] drm/gma500: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() Fernando Ramos
                   ` (4 subsequent siblings)
  17 siblings, 0 replies; 29+ messages in thread
From: Fernando Ramos @ 2021-09-24  6:43 UTC (permalink / raw)
  To: dri-devel
  Cc: linux-kernel, sean, linux-doc, amd-gfx, intel-gfx, linux-arm-msm,
	freedreno, nouveau, linux-renesas-soc, linux-tegra

As requested in Documentation/gpu/todo.rst, replace driver calls to
drm_modeset_lock_all() with DRM_MODESET_LOCK_ALL_BEGIN() and
DRM_MODESET_LOCK_ALL_END()

While the previous commit was a simple "search and replace", this time I
had to do a bit of refactoring as only one call to
DRM_MODESET_LOCK_ALL_BEGIN() is allowed inside one same function.

Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
---
 drivers/gpu/drm/i915/display/intel_overlay.c | 40 ++++++++++----------
 1 file changed, 19 insertions(+), 21 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_overlay.c b/drivers/gpu/drm/i915/display/intel_overlay.c
index c0ee135e5499..c623738c59c8 100644
--- a/drivers/gpu/drm/i915/display/intel_overlay.c
+++ b/drivers/gpu/drm/i915/display/intel_overlay.c
@@ -1105,6 +1105,7 @@ int intel_overlay_put_image_ioctl(struct drm_device *dev, void *data,
 	struct drm_crtc *drmmode_crtc;
 	struct intel_crtc *crtc;
 	struct drm_i915_gem_object *new_bo;
+	struct drm_modeset_acquire_ctx ctx;
 	int ret;
 
 	overlay = dev_priv->overlay;
@@ -1113,24 +1114,24 @@ int intel_overlay_put_image_ioctl(struct drm_device *dev, void *data,
 		return -ENODEV;
 	}
 
-	if (!(params->flags & I915_OVERLAY_ENABLE)) {
-		drm_modeset_lock_all(dev);
-		ret = intel_overlay_switch_off(overlay);
-		drm_modeset_unlock_all(dev);
+	if (params->flags & I915_OVERLAY_ENABLE) {
 
-		return ret;
-	}
+		drmmode_crtc = drm_crtc_find(dev, file_priv, params->crtc_id);
+		if (!drmmode_crtc)
+			return -ENOENT;
+		crtc = to_intel_crtc(drmmode_crtc);
 
-	drmmode_crtc = drm_crtc_find(dev, file_priv, params->crtc_id);
-	if (!drmmode_crtc)
-		return -ENOENT;
-	crtc = to_intel_crtc(drmmode_crtc);
+		new_bo = i915_gem_object_lookup(file_priv, params->bo_handle);
+		if (!new_bo)
+			return -ENOENT;
+	}
 
-	new_bo = i915_gem_object_lookup(file_priv, params->bo_handle);
-	if (!new_bo)
-		return -ENOENT;
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 
-	drm_modeset_lock_all(dev);
+	if (!(params->flags & I915_OVERLAY_ENABLE)) {
+		ret = intel_overlay_switch_off(overlay);
+		goto out_unlock;
+	}
 
 	if (i915_gem_object_is_tiled(new_bo)) {
 		drm_dbg_kms(&dev_priv->drm,
@@ -1195,14 +1196,11 @@ int intel_overlay_put_image_ioctl(struct drm_device *dev, void *data,
 	if (ret != 0)
 		goto out_unlock;
 
-	drm_modeset_unlock_all(dev);
-	i915_gem_object_put(new_bo);
-
-	return 0;
-
 out_unlock:
-	drm_modeset_unlock_all(dev);
-	i915_gem_object_put(new_bo);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
+
+	if (params->flags & I915_OVERLAY_ENABLE)
+		i915_gem_object_put(new_bo);
 
 	return ret;
 }
-- 
2.33.0


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [Nouveau] [PATCH v2 14/17] drm/gma500: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  2021-09-24  6:43 [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible Fernando Ramos
                   ` (12 preceding siblings ...)
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 13/17] drm/i915: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() part 2 Fernando Ramos
@ 2021-09-24  6:43 ` Fernando Ramos
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 15/17] drm/amd: " Fernando Ramos
                   ` (3 subsequent siblings)
  17 siblings, 0 replies; 29+ messages in thread
From: Fernando Ramos @ 2021-09-24  6:43 UTC (permalink / raw)
  To: dri-devel
  Cc: linux-kernel, sean, linux-doc, amd-gfx, intel-gfx, linux-arm-msm,
	freedreno, nouveau, linux-renesas-soc, linux-tegra

As requested in Documentation/gpu/todo.rst, replace driver calls to
drm_modeset_lock_all() with DRM_MODESET_LOCK_ALL_BEGIN() and
DRM_MODESET_LOCK_ALL_END()

Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
---
 drivers/gpu/drm/gma500/psb_device.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/gma500/psb_device.c b/drivers/gpu/drm/gma500/psb_device.c
index 951725a0f7a3..98d06736dbaa 100644
--- a/drivers/gpu/drm/gma500/psb_device.c
+++ b/drivers/gpu/drm/gma500/psb_device.c
@@ -8,6 +8,7 @@
 #include <linux/backlight.h>
 
 #include <drm/drm.h>
+#include <drm/drm_drv.h>
 
 #include "gma_device.h"
 #include "intel_bios.h"
@@ -169,8 +170,10 @@ static int psb_save_display_registers(struct drm_device *dev)
 {
 	struct drm_psb_private *dev_priv = dev->dev_private;
 	struct drm_crtc *crtc;
+	struct drm_modeset_acquire_ctx ctx;
 	struct gma_connector *connector;
 	struct psb_state *regs = &dev_priv->regs.psb;
+	int ret;
 
 	/* Display arbitration control + watermarks */
 	regs->saveDSPARB = PSB_RVDC32(DSPARB);
@@ -183,7 +186,7 @@ static int psb_save_display_registers(struct drm_device *dev)
 	regs->saveCHICKENBIT = PSB_RVDC32(DSPCHICKENBIT);
 
 	/* Save crtc and output state */
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 		if (drm_helper_crtc_in_use(crtc))
 			dev_priv->ops->save_crtc(crtc);
@@ -193,8 +196,9 @@ static int psb_save_display_registers(struct drm_device *dev)
 		if (connector->save)
 			connector->save(&connector->base);
 
-	drm_modeset_unlock_all(dev);
-	return 0;
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
+
+	return ret;
 }
 
 /**
@@ -207,8 +211,10 @@ static int psb_restore_display_registers(struct drm_device *dev)
 {
 	struct drm_psb_private *dev_priv = dev->dev_private;
 	struct drm_crtc *crtc;
+	struct drm_modeset_acquire_ctx ctx;
 	struct gma_connector *connector;
 	struct psb_state *regs = &dev_priv->regs.psb;
+	int ret;
 
 	/* Display arbitration + watermarks */
 	PSB_WVDC32(regs->saveDSPARB, DSPARB);
@@ -223,7 +229,7 @@ static int psb_restore_display_registers(struct drm_device *dev)
 	/*make sure VGA plane is off. it initializes to on after reset!*/
 	PSB_WVDC32(0x80000000, VGACNTRL);
 
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
 		if (drm_helper_crtc_in_use(crtc))
 			dev_priv->ops->restore_crtc(crtc);
@@ -232,8 +238,8 @@ static int psb_restore_display_registers(struct drm_device *dev)
 		if (connector->restore)
 			connector->restore(&connector->base);
 
-	drm_modeset_unlock_all(dev);
-	return 0;
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
+	return ret;
 }
 
 static int psb_power_down(struct drm_device *dev)
-- 
2.33.0


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [Nouveau] [PATCH v2 15/17] drm/amd: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
  2021-09-24  6:43 [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible Fernando Ramos
                   ` (13 preceding siblings ...)
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 14/17] drm/gma500: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() Fernando Ramos
@ 2021-09-24  6:43 ` Fernando Ramos
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 16/17] drm: cleanup: remove drm_modeset_(un)lock_all() Fernando Ramos
                   ` (2 subsequent siblings)
  17 siblings, 0 replies; 29+ messages in thread
From: Fernando Ramos @ 2021-09-24  6:43 UTC (permalink / raw)
  To: dri-devel
  Cc: linux-kernel, sean, linux-doc, amd-gfx, intel-gfx, linux-arm-msm,
	freedreno, nouveau, linux-renesas-soc, linux-tegra

As requested in Documentation/gpu/todo.rst, replace driver calls to
drm_modeset_lock_all() with DRM_MODESET_LOCK_ALL_BEGIN() and
DRM_MODESET_LOCK_ALL_END()

Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_display.c   | 21 +++++---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 50 +++++++++----------
 .../amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 25 ++++++----
 3 files changed, 53 insertions(+), 43 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
index 7a7316731911..b07e845a2600 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
@@ -40,6 +40,7 @@
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_fourcc.h>
 #include <drm/drm_vblank.h>
+#include <drm/drm_drv.h>
 
 static void amdgpu_display_flip_callback(struct dma_fence *f,
 					 struct dma_fence_cb *cb)
@@ -1543,16 +1544,21 @@ int amdgpu_display_suspend_helper(struct amdgpu_device *adev)
 	struct drm_crtc *crtc;
 	struct drm_connector *connector;
 	struct drm_connector_list_iter iter;
-	int r;
+	struct drm_modeset_acquire_ctx ctx;
+	int r, ret;
 
 	/* turn off display hw */
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 	drm_connector_list_iter_begin(dev, &iter);
 	drm_for_each_connector_iter(connector, &iter)
 		drm_helper_connector_dpms(connector,
 					  DRM_MODE_DPMS_OFF);
 	drm_connector_list_iter_end(&iter);
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
+
+	if (ret)
+		return ret;
+
 	/* unpin the front buffers and cursors */
 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 		struct amdgpu_crtc *amdgpu_crtc = to_amdgpu_crtc(crtc);
@@ -1590,7 +1596,8 @@ int amdgpu_display_resume_helper(struct amdgpu_device *adev)
 	struct drm_connector *connector;
 	struct drm_connector_list_iter iter;
 	struct drm_crtc *crtc;
-	int r;
+	struct drm_modeset_acquire_ctx ctx;
+	int r, ret;
 
 	/* pin cursors */
 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
@@ -1612,7 +1619,7 @@ int amdgpu_display_resume_helper(struct amdgpu_device *adev)
 	drm_helper_resume_force_mode(dev);
 
 	/* turn on display hw */
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 
 	drm_connector_list_iter_begin(dev, &iter);
 	drm_for_each_connector_iter(connector, &iter)
@@ -1620,8 +1627,8 @@ int amdgpu_display_resume_helper(struct amdgpu_device *adev)
 					  DRM_MODE_DPMS_ON);
 	drm_connector_list_iter_end(&iter);
 
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 
-	return 0;
+	return ret;
 }
 
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 9b1fc54555ee..5196c1d26f87 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -80,6 +80,7 @@
 #include <drm/drm_edid.h>
 #include <drm/drm_vblank.h>
 #include <drm/drm_audio_component.h>
+#include <drm/drm_drv.h>
 
 #if defined(CONFIG_DRM_AMD_DC_DCN)
 #include "ivsrcid/dcn/irqsrcs_dcn_1_0.h"
@@ -2621,6 +2622,9 @@ static void handle_hpd_irq(void *param)
 #ifdef CONFIG_DRM_AMD_DC_HDCP
 	struct dm_connector_state *dm_con_state = to_dm_connector_state(connector->state);
 #endif
+	struct drm_modeset_acquire_ctx ctx;
+	int ret;
+
 
 	if (adev->dm.disable_hpd_irq)
 		return;
@@ -2646,14 +2650,6 @@ static void handle_hpd_irq(void *param)
 	if (aconnector->base.force && new_connection_type == dc_connection_none) {
 		emulated_link_detect(aconnector->dc_link);
 
-
-		drm_modeset_lock_all(dev);
-		dm_restore_drm_connector_state(dev, connector);
-		drm_modeset_unlock_all(dev);
-
-		if (aconnector->base.force == DRM_FORCE_UNSPECIFIED)
-			drm_kms_helper_hotplug_event(dev);
-
 	} else if (dc_link_detect(aconnector->dc_link, DETECT_REASON_HPD)) {
 		if (new_connection_type == dc_connection_none &&
 		    aconnector->dc_link->type == dc_connection_none)
@@ -2661,13 +2657,18 @@ static void handle_hpd_irq(void *param)
 
 		amdgpu_dm_update_connector_after_detect(aconnector);
 
-		drm_modeset_lock_all(dev);
-		dm_restore_drm_connector_state(dev, connector);
-		drm_modeset_unlock_all(dev);
-
-		if (aconnector->base.force == DRM_FORCE_UNSPECIFIED)
-			drm_kms_helper_hotplug_event(dev);
+	} else {
+		goto out;
 	}
+
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
+	dm_restore_drm_connector_state(dev, connector);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
+
+	if (aconnector->base.force == DRM_FORCE_UNSPECIFIED)
+		drm_kms_helper_hotplug_event(dev);
+
+out:
 	mutex_unlock(&aconnector->hpd_lock);
 
 }
@@ -2756,12 +2757,14 @@ static void handle_hpd_rx_irq(void *param)
 	struct drm_connector *connector = &aconnector->base;
 	struct drm_device *dev = connector->dev;
 	struct dc_link *dc_link = aconnector->dc_link;
+	struct drm_modeset_acquire_ctx ctx;
 	bool is_mst_root_connector = aconnector->mst_mgr.mst_state;
 	bool result = false;
 	enum dc_connection_type new_connection_type = dc_connection_none;
 	struct amdgpu_device *adev = drm_to_adev(dev);
 	union hpd_irq_data hpd_irq_data;
 	bool lock_flag = 0;
+	int ret;
 
 	memset(&hpd_irq_data, 0, sizeof(hpd_irq_data));
 
@@ -2828,12 +2831,6 @@ static void handle_hpd_rx_irq(void *param)
 
 			amdgpu_dm_update_connector_after_detect(aconnector);
 
-
-			drm_modeset_lock_all(dev);
-			dm_restore_drm_connector_state(dev, connector);
-			drm_modeset_unlock_all(dev);
-
-			drm_kms_helper_hotplug_event(dev);
 		} else if (dc_link_detect(dc_link, DETECT_REASON_HPDRX)) {
 
 			if (aconnector->fake_enable)
@@ -2841,14 +2838,17 @@ static void handle_hpd_rx_irq(void *param)
 
 			amdgpu_dm_update_connector_after_detect(aconnector);
 
+		} else {
+			goto finish;
+		}
 
-			drm_modeset_lock_all(dev);
-			dm_restore_drm_connector_state(dev, connector);
-			drm_modeset_unlock_all(dev);
+		DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
+		dm_restore_drm_connector_state(dev, connector);
+		DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 
-			drm_kms_helper_hotplug_event(dev);
-		}
+		drm_kms_helper_hotplug_event(dev);
 	}
+finish:
 #ifdef CONFIG_DRM_AMD_DC_HDCP
 	if (hpd_irq_data.bytes.device_service_irq.bits.CP_IRQ) {
 		if (adev->dm.hdcp_workqueue)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
index 87daa78a32b8..fb7b56fa2673 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
@@ -24,6 +24,7 @@
  */
 
 #include <linux/uaccess.h>
+#include <drm/drm_drv.h>
 
 #include "dc.h"
 #include "amdgpu.h"
@@ -1191,12 +1192,14 @@ static ssize_t trigger_hotplug(struct file *f, const char __user *buf,
 	struct drm_connector *connector = &aconnector->base;
 	struct dc_link *link = NULL;
 	struct drm_device *dev = connector->dev;
+	struct drm_modeset_acquire_ctx ctx;
 	enum dc_connection_type new_connection_type = dc_connection_none;
 	char *wr_buf = NULL;
 	uint32_t wr_buf_size = 42;
 	int max_param_num = 1;
 	long param[1] = {0};
 	uint8_t param_nums = 0;
+	int ret;
 
 	if (!aconnector || !aconnector->dc_link)
 		return -EINVAL;
@@ -1236,12 +1239,6 @@ static ssize_t trigger_hotplug(struct file *f, const char __user *buf,
 			goto unlock;
 
 		amdgpu_dm_update_connector_after_detect(aconnector);
-
-		drm_modeset_lock_all(dev);
-		dm_restore_drm_connector_state(dev, connector);
-		drm_modeset_unlock_all(dev);
-
-		drm_kms_helper_hotplug_event(dev);
 	} else if (param[0] == 0) {
 		if (!aconnector->dc_link)
 			goto unlock;
@@ -1259,13 +1256,19 @@ static ssize_t trigger_hotplug(struct file *f, const char __user *buf,
 
 		amdgpu_dm_update_connector_after_detect(aconnector);
 
-		drm_modeset_lock_all(dev);
-		dm_restore_drm_connector_state(dev, connector);
-		drm_modeset_unlock_all(dev);
-
-		drm_kms_helper_hotplug_event(dev);
+	} else {
+		goto unlock;
 	}
 
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
+	dm_restore_drm_connector_state(dev, connector);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
+
+	if (ret)
+		return ret;
+
+	drm_kms_helper_hotplug_event(dev);
+
 unlock:
 	mutex_unlock(&aconnector->hpd_lock);
 
-- 
2.33.0


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [Nouveau] [PATCH v2 16/17] drm: cleanup: remove drm_modeset_(un)lock_all()
  2021-09-24  6:43 [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible Fernando Ramos
                   ` (14 preceding siblings ...)
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 15/17] drm/amd: " Fernando Ramos
@ 2021-09-24  6:43 ` Fernando Ramos
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 17/17] doc: drm: remove TODO entry regarding DRM_MODSET_LOCK_ALL cleanup Fernando Ramos
  2021-10-01 18:36 ` [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible Sean Paul
  17 siblings, 0 replies; 29+ messages in thread
From: Fernando Ramos @ 2021-09-24  6:43 UTC (permalink / raw)
  To: dri-devel
  Cc: linux-kernel, sean, linux-doc, amd-gfx, intel-gfx, linux-arm-msm,
	freedreno, nouveau, linux-renesas-soc, linux-tegra

Functions drm_modeset_lock_all() and drm_modeset_unlock_all() are no
longer used anywhere and can be removed.

Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
---
 drivers/gpu/drm/drm_modeset_lock.c | 94 +-----------------------------
 include/drm/drm_modeset_lock.h     |  2 -
 2 files changed, 3 insertions(+), 93 deletions(-)

diff --git a/drivers/gpu/drm/drm_modeset_lock.c b/drivers/gpu/drm/drm_modeset_lock.c
index fcfe1a03c4a1..afd1351749a5 100644
--- a/drivers/gpu/drm/drm_modeset_lock.c
+++ b/drivers/gpu/drm/drm_modeset_lock.c
@@ -77,93 +77,6 @@
 
 static DEFINE_WW_CLASS(crtc_ww_class);
 
-/**
- * drm_modeset_lock_all - take all modeset locks
- * @dev: DRM device
- *
- * This function takes all modeset locks, suitable where a more fine-grained
- * scheme isn't (yet) implemented. Locks must be dropped by calling the
- * drm_modeset_unlock_all() function.
- *
- * This function is deprecated. It allocates a lock acquisition context and
- * stores it in &drm_device.mode_config. This facilitate conversion of
- * existing code because it removes the need to manually deal with the
- * acquisition context, but it is also brittle because the context is global
- * and care must be taken not to nest calls. New code should use the
- * drm_modeset_lock_all_ctx() function and pass in the context explicitly.
- */
-void drm_modeset_lock_all(struct drm_device *dev)
-{
-	struct drm_mode_config *config = &dev->mode_config;
-	struct drm_modeset_acquire_ctx *ctx;
-	int ret;
-
-	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL | __GFP_NOFAIL);
-	if (WARN_ON(!ctx))
-		return;
-
-	mutex_lock(&config->mutex);
-
-	drm_modeset_acquire_init(ctx, 0);
-
-retry:
-	ret = drm_modeset_lock_all_ctx(dev, ctx);
-	if (ret < 0) {
-		if (ret == -EDEADLK) {
-			drm_modeset_backoff(ctx);
-			goto retry;
-		}
-
-		drm_modeset_acquire_fini(ctx);
-		kfree(ctx);
-		return;
-	}
-	ww_acquire_done(&ctx->ww_ctx);
-
-	WARN_ON(config->acquire_ctx);
-
-	/*
-	 * We hold the locks now, so it is safe to stash the acquisition
-	 * context for drm_modeset_unlock_all().
-	 */
-	config->acquire_ctx = ctx;
-
-	drm_warn_on_modeset_not_all_locked(dev);
-}
-EXPORT_SYMBOL(drm_modeset_lock_all);
-
-/**
- * drm_modeset_unlock_all - drop all modeset locks
- * @dev: DRM device
- *
- * This function drops all modeset locks taken by a previous call to the
- * drm_modeset_lock_all() function.
- *
- * This function is deprecated. It uses the lock acquisition context stored
- * in &drm_device.mode_config. This facilitates conversion of existing
- * code because it removes the need to manually deal with the acquisition
- * context, but it is also brittle because the context is global and care must
- * be taken not to nest calls. New code should pass the acquisition context
- * directly to the drm_modeset_drop_locks() function.
- */
-void drm_modeset_unlock_all(struct drm_device *dev)
-{
-	struct drm_mode_config *config = &dev->mode_config;
-	struct drm_modeset_acquire_ctx *ctx = config->acquire_ctx;
-
-	if (WARN_ON(!ctx))
-		return;
-
-	config->acquire_ctx = NULL;
-	drm_modeset_drop_locks(ctx);
-	drm_modeset_acquire_fini(ctx);
-
-	kfree(ctx);
-
-	mutex_unlock(&dev->mode_config.mutex);
-}
-EXPORT_SYMBOL(drm_modeset_unlock_all);
-
 /**
  * drm_warn_on_modeset_not_all_locked - check that all modeset locks are locked
  * @dev: device
@@ -380,10 +293,9 @@ EXPORT_SYMBOL(drm_modeset_unlock);
  * This function takes all modeset locks, suitable where a more fine-grained
  * scheme isn't (yet) implemented.
  *
- * Unlike drm_modeset_lock_all(), it doesn't take the &drm_mode_config.mutex
- * since that lock isn't required for modeset state changes. Callers which
- * need to grab that lock too need to do so outside of the acquire context
- * @ctx.
+ * It doesn't take the &drm_mode_config.mutex since that lock isn't required for
+ * modeset state changes. Callers which need to grab that lock too need to do so
+ * outside of the acquire context @ctx.
  *
  * Locks acquired with this function should be released by calling the
  * drm_modeset_drop_locks() function on @ctx.
diff --git a/include/drm/drm_modeset_lock.h b/include/drm/drm_modeset_lock.h
index aafd07388eb7..865e64bcc4cb 100644
--- a/include/drm/drm_modeset_lock.h
+++ b/include/drm/drm_modeset_lock.h
@@ -132,8 +132,6 @@ struct drm_device;
 struct drm_crtc;
 struct drm_plane;
 
-void drm_modeset_lock_all(struct drm_device *dev);
-void drm_modeset_unlock_all(struct drm_device *dev);
 void drm_warn_on_modeset_not_all_locked(struct drm_device *dev);
 
 int drm_modeset_lock_all_ctx(struct drm_device *dev,
-- 
2.33.0


^ permalink raw reply	[flat|nested] 29+ messages in thread

* [Nouveau] [PATCH v2 17/17] doc: drm: remove TODO entry regarding DRM_MODSET_LOCK_ALL cleanup
  2021-09-24  6:43 [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible Fernando Ramos
                   ` (15 preceding siblings ...)
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 16/17] drm: cleanup: remove drm_modeset_(un)lock_all() Fernando Ramos
@ 2021-09-24  6:43 ` Fernando Ramos
  2021-10-01 18:36 ` [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible Sean Paul
  17 siblings, 0 replies; 29+ messages in thread
From: Fernando Ramos @ 2021-09-24  6:43 UTC (permalink / raw)
  To: dri-devel
  Cc: linux-kernel, sean, linux-doc, amd-gfx, intel-gfx, linux-arm-msm,
	freedreno, nouveau, linux-renesas-soc, linux-tegra

The previous commits do exactly what this entry in the TODO file asks
for, thus we can remove it now as it is no longer applicable.

Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
Reviewed-by: Sean Paul <sean@poorly.run>
---
 Documentation/gpu/todo.rst                | 17 -----------------
 Documentation/locking/ww-mutex-design.rst |  2 +-
 2 files changed, 1 insertion(+), 18 deletions(-)

diff --git a/Documentation/gpu/todo.rst b/Documentation/gpu/todo.rst
index 12e61869939e..6613543955e9 100644
--- a/Documentation/gpu/todo.rst
+++ b/Documentation/gpu/todo.rst
@@ -353,23 +353,6 @@ converted, except for struct drm_driver.gem_prime_mmap.
 
 Level: Intermediate
 
-Use DRM_MODESET_LOCK_ALL_* helpers instead of boilerplate
----------------------------------------------------------
-
-For cases where drivers are attempting to grab the modeset locks with a local
-acquire context. Replace the boilerplate code surrounding
-drm_modeset_lock_all_ctx() with DRM_MODESET_LOCK_ALL_BEGIN() and
-DRM_MODESET_LOCK_ALL_END() instead.
-
-This should also be done for all places where drm_modeset_lock_all() is still
-used.
-
-As a reference, take a look at the conversions already completed in drm core.
-
-Contact: Sean Paul, respective driver maintainers
-
-Level: Starter
-
 Rename CMA helpers to DMA helpers
 ---------------------------------
 
diff --git a/Documentation/locking/ww-mutex-design.rst b/Documentation/locking/ww-mutex-design.rst
index 6a4d7319f8f0..6a8f8beb9ec4 100644
--- a/Documentation/locking/ww-mutex-design.rst
+++ b/Documentation/locking/ww-mutex-design.rst
@@ -60,7 +60,7 @@ Concepts
 Compared to normal mutexes two additional concepts/objects show up in the lock
 interface for w/w mutexes:
 
-Acquire context: To ensure eventual forward progress it is important the a task
+Acquire context: To ensure eventual forward progress it is important that a task
 trying to acquire locks doesn't grab a new reservation id, but keeps the one it
 acquired when starting the lock acquisition. This ticket is stored in the
 acquire context. Furthermore the acquire context keeps track of debugging state
-- 
2.33.0


^ permalink raw reply	[flat|nested] 29+ messages in thread

* Re: [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible
  2021-09-24  6:43 [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible Fernando Ramos
                   ` (16 preceding siblings ...)
  2021-09-24  6:43 ` [Nouveau] [PATCH v2 17/17] doc: drm: remove TODO entry regarding DRM_MODSET_LOCK_ALL cleanup Fernando Ramos
@ 2021-10-01 18:36 ` Sean Paul
  2021-10-01 19:00   ` Ville Syrjälä
  17 siblings, 1 reply; 29+ messages in thread
From: Sean Paul @ 2021-10-01 18:36 UTC (permalink / raw)
  To: Fernando Ramos
  Cc: dri-devel, linux-kernel, sean, linux-doc, amd-gfx, intel-gfx,
	linux-arm-msm, freedreno, nouveau, linux-renesas-soc,
	linux-tegra

On Fri, Sep 24, 2021 at 08:43:07AM +0200, Fernando Ramos wrote:
> Hi all,
> 
> One of the things in the DRM TODO list ("Documentation/gpu/todo.rst") was to
> "use DRM_MODESET_LOCAL_ALL_* helpers instead of boilerplate". That's what this
> patch series is about.
> 
> You will find two types of changes here:
> 
>   - Replacing "drm_modeset_lock_all_ctx()" (and surrounding boilerplate) with
>     "DRM_MODESET_LOCK_ALL_BEGIN()/END()" in the remaining places (as it has
>     already been done in previous commits such as b7ea04d2)
> 
>   - Replacing "drm_modeset_lock_all()" with "DRM_MODESET_LOCK_ALL_BEGIN()/END()"
>     in the remaining places (as it has already been done in previous commits
>     such as 57037094)
>     
> Most of the changes are straight forward, except for a few cases in the "amd"
> and "i915" drivers where some extra dancing was needed to overcome the
> limitation that the DRM_MODESET_LOCK_ALL_BEGIN()/END() macros can only be used
> once inside the same function (the reason being that the macro expansion
> includes *labels*, and you can not have two labels named the same inside one
> function)
> 
> Notice that, even after this patch series, some places remain where
> "drm_modeset_lock_all()" and "drm_modeset_lock_all_ctx()" are still present,
> all inside drm core (which makes sense), except for two (in "amd" and "i915")
> which cannot be replaced due to the way they are being used.
> 
> Changes in v2:
> 
>   - Fix commit message typo
>   - Use the value returned by DRM_MODESET_LOCK_ALL_END when possible
>   - Split drm/i915 patch into two simpler ones
>   - Remove drm_modeset_(un)lock_all()
>   - Fix build problems in non-x86 platforms
> 
> Fernando Ramos (17):
>   drm: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()
>   drm/i915: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()
>   drm/msm: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()
>   drm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() drm/vmwgfx: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
>   drm/tegra: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
>   drm/shmobile: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
>   drm/radeon: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
>   drm/omapdrm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
>   drm/nouveau: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
>   drm/msm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
>   drm/i915: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
>   drm/i915: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() part 2
>   drm/gma500: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
>   drm/amd: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
>   drm: cleanup: remove drm_modeset_(un)lock_all()
>   doc: drm: remove TODO entry regarding DRM_MODSET_LOCK_ALL cleanup
> 

Thank you for revising, Fernando! I've pushed the set to drm-misc-next (along
with the necessary drm-tip conflict resolutions).

Sean

>  Documentation/gpu/todo.rst                    | 17 ----
>  Documentation/locking/ww-mutex-design.rst     |  2 +-
>  drivers/gpu/drm/amd/amdgpu/amdgpu_display.c   | 21 +++--
>  .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 50 +++++-----
>  .../amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 25 ++---
>  drivers/gpu/drm/drm_client_modeset.c          | 14 ++-
>  drivers/gpu/drm/drm_crtc_helper.c             | 18 ++--
>  drivers/gpu/drm/drm_fb_helper.c               | 10 +-
>  drivers/gpu/drm/drm_framebuffer.c             |  6 +-
>  drivers/gpu/drm/drm_modeset_lock.c            | 94 +------------------
>  drivers/gpu/drm/gma500/psb_device.c           | 18 ++--
>  drivers/gpu/drm/i915/display/intel_audio.c    | 16 ++--
>  drivers/gpu/drm/i915/display/intel_display.c  | 23 ++---
>  .../drm/i915/display/intel_display_debugfs.c  | 46 +++++----
>  drivers/gpu/drm/i915/display/intel_overlay.c  | 46 ++++-----
>  drivers/gpu/drm/i915/display/intel_pipe_crc.c |  7 +-
>  drivers/gpu/drm/i915/i915_drv.c               | 13 ++-
>  drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c      | 10 +-
>  .../gpu/drm/msm/disp/msm_disp_snapshot_util.c | 12 +--
>  drivers/gpu/drm/nouveau/dispnv50/disp.c       | 15 ++-
>  drivers/gpu/drm/omapdrm/omap_fb.c             |  9 +-
>  drivers/gpu/drm/radeon/radeon_device.c        | 21 +++--
>  drivers/gpu/drm/radeon/radeon_dp_mst.c        | 10 +-
>  drivers/gpu/drm/shmobile/shmob_drm_drv.c      |  6 +-
>  drivers/gpu/drm/tegra/dsi.c                   |  6 +-
>  drivers/gpu/drm/tegra/hdmi.c                  |  6 +-
>  drivers/gpu/drm/tegra/sor.c                   | 11 ++-
>  drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c         | 11 ++-
>  drivers/gpu/drm/vmwgfx/vmwgfx_kms.c           | 12 ++-
>  include/drm/drm_modeset_lock.h                |  2 -
>  30 files changed, 265 insertions(+), 292 deletions(-)
> 
> 
> base-commit: 6880fa6c56601bb8ed59df6c30fd390cc5f6dd8f
> -- 
> 2.33.0
> 

-- 
Sean Paul, Software Engineer, Google / Chromium OS

^ permalink raw reply	[flat|nested] 29+ messages in thread

* Re: [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible
  2021-10-01 18:36 ` [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible Sean Paul
@ 2021-10-01 19:00   ` Ville Syrjälä
  2021-10-01 20:48     ` Sean Paul
  0 siblings, 1 reply; 29+ messages in thread
From: Ville Syrjälä @ 2021-10-01 19:00 UTC (permalink / raw)
  To: Sean Paul
  Cc: Fernando Ramos, dri-devel, linux-kernel, linux-doc, amd-gfx,
	intel-gfx, linux-arm-msm, freedreno, nouveau, linux-renesas-soc,
	linux-tegra

On Fri, Oct 01, 2021 at 02:36:55PM -0400, Sean Paul wrote:
> On Fri, Sep 24, 2021 at 08:43:07AM +0200, Fernando Ramos wrote:
> > Hi all,
> > 
> > One of the things in the DRM TODO list ("Documentation/gpu/todo.rst") was to
> > "use DRM_MODESET_LOCAL_ALL_* helpers instead of boilerplate". That's what this
> > patch series is about.
> > 
> > You will find two types of changes here:
> > 
> >   - Replacing "drm_modeset_lock_all_ctx()" (and surrounding boilerplate) with
> >     "DRM_MODESET_LOCK_ALL_BEGIN()/END()" in the remaining places (as it has
> >     already been done in previous commits such as b7ea04d2)
> > 
> >   - Replacing "drm_modeset_lock_all()" with "DRM_MODESET_LOCK_ALL_BEGIN()/END()"
> >     in the remaining places (as it has already been done in previous commits
> >     such as 57037094)
> >     
> > Most of the changes are straight forward, except for a few cases in the "amd"
> > and "i915" drivers where some extra dancing was needed to overcome the
> > limitation that the DRM_MODESET_LOCK_ALL_BEGIN()/END() macros can only be used
> > once inside the same function (the reason being that the macro expansion
> > includes *labels*, and you can not have two labels named the same inside one
> > function)
> > 
> > Notice that, even after this patch series, some places remain where
> > "drm_modeset_lock_all()" and "drm_modeset_lock_all_ctx()" are still present,
> > all inside drm core (which makes sense), except for two (in "amd" and "i915")
> > which cannot be replaced due to the way they are being used.
> > 
> > Changes in v2:
> > 
> >   - Fix commit message typo
> >   - Use the value returned by DRM_MODESET_LOCK_ALL_END when possible
> >   - Split drm/i915 patch into two simpler ones
> >   - Remove drm_modeset_(un)lock_all()
> >   - Fix build problems in non-x86 platforms
> > 
> > Fernando Ramos (17):
> >   drm: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()
> >   drm/i915: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()
> >   drm/msm: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()
> >   drm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() drm/vmwgfx: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> >   drm/tegra: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> >   drm/shmobile: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> >   drm/radeon: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> >   drm/omapdrm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> >   drm/nouveau: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> >   drm/msm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> >   drm/i915: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> >   drm/i915: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() part 2
> >   drm/gma500: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> >   drm/amd: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> >   drm: cleanup: remove drm_modeset_(un)lock_all()
> >   doc: drm: remove TODO entry regarding DRM_MODSET_LOCK_ALL cleanup
> > 
> 
> Thank you for revising, Fernando! I've pushed the set to drm-misc-next (along
> with the necessary drm-tip conflict resolutions).

Ugh. Did anyone actually review the locking changes this does?
I shot the previous i915 stuff down because the commit messages
did not address any of it.

-- 
Ville Syrjälä
Intel

^ permalink raw reply	[flat|nested] 29+ messages in thread

* Re: [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible
  2021-10-01 19:00   ` Ville Syrjälä
@ 2021-10-01 20:48     ` Sean Paul
  2021-10-01 22:05       ` Ville Syrjälä
  0 siblings, 1 reply; 29+ messages in thread
From: Sean Paul @ 2021-10-01 20:48 UTC (permalink / raw)
  To: Ville Syrjälä
  Cc: Sean Paul, Fernando Ramos, dri-devel, linux-kernel, linux-doc,
	amd-gfx, intel-gfx, linux-arm-msm, freedreno, nouveau,
	linux-renesas-soc, linux-tegra

On Fri, Oct 01, 2021 at 10:00:50PM +0300, Ville Syrjälä wrote:
> On Fri, Oct 01, 2021 at 02:36:55PM -0400, Sean Paul wrote:
> > On Fri, Sep 24, 2021 at 08:43:07AM +0200, Fernando Ramos wrote:
> > > Hi all,
> > > 
> > > One of the things in the DRM TODO list ("Documentation/gpu/todo.rst") was to
> > > "use DRM_MODESET_LOCAL_ALL_* helpers instead of boilerplate". That's what this
> > > patch series is about.
> > > 
> > > You will find two types of changes here:
> > > 
> > >   - Replacing "drm_modeset_lock_all_ctx()" (and surrounding boilerplate) with
> > >     "DRM_MODESET_LOCK_ALL_BEGIN()/END()" in the remaining places (as it has
> > >     already been done in previous commits such as b7ea04d2)
> > > 
> > >   - Replacing "drm_modeset_lock_all()" with "DRM_MODESET_LOCK_ALL_BEGIN()/END()"
> > >     in the remaining places (as it has already been done in previous commits
> > >     such as 57037094)
> > >     
> > > Most of the changes are straight forward, except for a few cases in the "amd"
> > > and "i915" drivers where some extra dancing was needed to overcome the
> > > limitation that the DRM_MODESET_LOCK_ALL_BEGIN()/END() macros can only be used
> > > once inside the same function (the reason being that the macro expansion
> > > includes *labels*, and you can not have two labels named the same inside one
> > > function)
> > > 
> > > Notice that, even after this patch series, some places remain where
> > > "drm_modeset_lock_all()" and "drm_modeset_lock_all_ctx()" are still present,
> > > all inside drm core (which makes sense), except for two (in "amd" and "i915")
> > > which cannot be replaced due to the way they are being used.
> > > 
> > > Changes in v2:
> > > 
> > >   - Fix commit message typo
> > >   - Use the value returned by DRM_MODESET_LOCK_ALL_END when possible
> > >   - Split drm/i915 patch into two simpler ones
> > >   - Remove drm_modeset_(un)lock_all()
> > >   - Fix build problems in non-x86 platforms
> > > 
> > > Fernando Ramos (17):
> > >   drm: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > >   drm/i915: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > >   drm/msm: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > >   drm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() drm/vmwgfx: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > >   drm/tegra: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > >   drm/shmobile: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > >   drm/radeon: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > >   drm/omapdrm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > >   drm/nouveau: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > >   drm/msm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > >   drm/i915: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > >   drm/i915: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() part 2
> > >   drm/gma500: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > >   drm/amd: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > >   drm: cleanup: remove drm_modeset_(un)lock_all()
> > >   doc: drm: remove TODO entry regarding DRM_MODSET_LOCK_ALL cleanup
> > > 
> > 
> > Thank you for revising, Fernando! I've pushed the set to drm-misc-next (along
> > with the necessary drm-tip conflict resolutions).
> 
> Ugh. Did anyone actually review the locking changes this does?
> I shot the previous i915 stuff down because the commit messages
> did not address any of it.

I reviewed the set on 9/17, I didn't see your feedback on that thread.

Sean

> 
> -- 
> Ville Syrjälä
> Intel

-- 
Sean Paul, Software Engineer, Google / Chromium OS

^ permalink raw reply	[flat|nested] 29+ messages in thread

* Re: [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible
  2021-10-01 20:48     ` Sean Paul
@ 2021-10-01 22:05       ` Ville Syrjälä
  2021-10-02  2:30         ` [Nouveau] [Intel-gfx] " Ville Syrjälä
  0 siblings, 1 reply; 29+ messages in thread
From: Ville Syrjälä @ 2021-10-01 22:05 UTC (permalink / raw)
  To: Sean Paul
  Cc: Fernando Ramos, dri-devel, linux-kernel, linux-doc, amd-gfx,
	intel-gfx, linux-arm-msm, freedreno, nouveau, linux-renesas-soc,
	linux-tegra

On Fri, Oct 01, 2021 at 04:48:15PM -0400, Sean Paul wrote:
> On Fri, Oct 01, 2021 at 10:00:50PM +0300, Ville Syrjälä wrote:
> > On Fri, Oct 01, 2021 at 02:36:55PM -0400, Sean Paul wrote:
> > > On Fri, Sep 24, 2021 at 08:43:07AM +0200, Fernando Ramos wrote:
> > > > Hi all,
> > > > 
> > > > One of the things in the DRM TODO list ("Documentation/gpu/todo.rst") was to
> > > > "use DRM_MODESET_LOCAL_ALL_* helpers instead of boilerplate". That's what this
> > > > patch series is about.
> > > > 
> > > > You will find two types of changes here:
> > > > 
> > > >   - Replacing "drm_modeset_lock_all_ctx()" (and surrounding boilerplate) with
> > > >     "DRM_MODESET_LOCK_ALL_BEGIN()/END()" in the remaining places (as it has
> > > >     already been done in previous commits such as b7ea04d2)
> > > > 
> > > >   - Replacing "drm_modeset_lock_all()" with "DRM_MODESET_LOCK_ALL_BEGIN()/END()"
> > > >     in the remaining places (as it has already been done in previous commits
> > > >     such as 57037094)
> > > >     
> > > > Most of the changes are straight forward, except for a few cases in the "amd"
> > > > and "i915" drivers where some extra dancing was needed to overcome the
> > > > limitation that the DRM_MODESET_LOCK_ALL_BEGIN()/END() macros can only be used
> > > > once inside the same function (the reason being that the macro expansion
> > > > includes *labels*, and you can not have two labels named the same inside one
> > > > function)
> > > > 
> > > > Notice that, even after this patch series, some places remain where
> > > > "drm_modeset_lock_all()" and "drm_modeset_lock_all_ctx()" are still present,
> > > > all inside drm core (which makes sense), except for two (in "amd" and "i915")
> > > > which cannot be replaced due to the way they are being used.
> > > > 
> > > > Changes in v2:
> > > > 
> > > >   - Fix commit message typo
> > > >   - Use the value returned by DRM_MODESET_LOCK_ALL_END when possible
> > > >   - Split drm/i915 patch into two simpler ones
> > > >   - Remove drm_modeset_(un)lock_all()
> > > >   - Fix build problems in non-x86 platforms
> > > > 
> > > > Fernando Ramos (17):
> > > >   drm: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > >   drm/i915: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > >   drm/msm: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > >   drm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() drm/vmwgfx: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > >   drm/tegra: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > >   drm/shmobile: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > >   drm/radeon: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > >   drm/omapdrm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > >   drm/nouveau: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > >   drm/msm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > >   drm/i915: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > >   drm/i915: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() part 2
> > > >   drm/gma500: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > >   drm/amd: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > >   drm: cleanup: remove drm_modeset_(un)lock_all()
> > > >   doc: drm: remove TODO entry regarding DRM_MODSET_LOCK_ALL cleanup
> > > > 
> > > 
> > > Thank you for revising, Fernando! I've pushed the set to drm-misc-next (along
> > > with the necessary drm-tip conflict resolutions).
> > 
> > Ugh. Did anyone actually review the locking changes this does?
> > I shot the previous i915 stuff down because the commit messages
> > did not address any of it.
> 
> I reviewed the set on 9/17, I didn't see your feedback on that thread.

It was much earlir than that.
https://lists.freedesktop.org/archives/dri-devel/2021-June/313193.html

And I think I might have also shot down a similar thing earlier.

I was actually half considering sending a patch to nuke that
misleading TODO item. I don't think anything which changes
which locks are taken should be considred a starter level task.
And the commit messages here don't seem to address any of it.

-- 
Ville Syrjälä
Intel

^ permalink raw reply	[flat|nested] 29+ messages in thread

* Re: [Nouveau] [Intel-gfx] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible
  2021-10-01 22:05       ` Ville Syrjälä
@ 2021-10-02  2:30         ` Ville Syrjälä
  2021-10-02  7:13           ` Fernando Ramos
  0 siblings, 1 reply; 29+ messages in thread
From: Ville Syrjälä @ 2021-10-02  2:30 UTC (permalink / raw)
  To: Sean Paul
  Cc: Fernando Ramos, dri-devel, linux-kernel, linux-doc, amd-gfx,
	intel-gfx, linux-arm-msm, freedreno, nouveau, linux-renesas-soc,
	linux-tegra

On Sat, Oct 02, 2021 at 01:05:47AM +0300, Ville Syrjälä wrote:
> On Fri, Oct 01, 2021 at 04:48:15PM -0400, Sean Paul wrote:
> > On Fri, Oct 01, 2021 at 10:00:50PM +0300, Ville Syrjälä wrote:
> > > On Fri, Oct 01, 2021 at 02:36:55PM -0400, Sean Paul wrote:
> > > > On Fri, Sep 24, 2021 at 08:43:07AM +0200, Fernando Ramos wrote:
> > > > > Hi all,
> > > > > 
> > > > > One of the things in the DRM TODO list ("Documentation/gpu/todo.rst") was to
> > > > > "use DRM_MODESET_LOCAL_ALL_* helpers instead of boilerplate". That's what this
> > > > > patch series is about.
> > > > > 
> > > > > You will find two types of changes here:
> > > > > 
> > > > >   - Replacing "drm_modeset_lock_all_ctx()" (and surrounding boilerplate) with
> > > > >     "DRM_MODESET_LOCK_ALL_BEGIN()/END()" in the remaining places (as it has
> > > > >     already been done in previous commits such as b7ea04d2)
> > > > > 
> > > > >   - Replacing "drm_modeset_lock_all()" with "DRM_MODESET_LOCK_ALL_BEGIN()/END()"
> > > > >     in the remaining places (as it has already been done in previous commits
> > > > >     such as 57037094)
> > > > >     
> > > > > Most of the changes are straight forward, except for a few cases in the "amd"
> > > > > and "i915" drivers where some extra dancing was needed to overcome the
> > > > > limitation that the DRM_MODESET_LOCK_ALL_BEGIN()/END() macros can only be used
> > > > > once inside the same function (the reason being that the macro expansion
> > > > > includes *labels*, and you can not have two labels named the same inside one
> > > > > function)
> > > > > 
> > > > > Notice that, even after this patch series, some places remain where
> > > > > "drm_modeset_lock_all()" and "drm_modeset_lock_all_ctx()" are still present,
> > > > > all inside drm core (which makes sense), except for two (in "amd" and "i915")
> > > > > which cannot be replaced due to the way they are being used.
> > > > > 
> > > > > Changes in v2:
> > > > > 
> > > > >   - Fix commit message typo
> > > > >   - Use the value returned by DRM_MODESET_LOCK_ALL_END when possible
> > > > >   - Split drm/i915 patch into two simpler ones
> > > > >   - Remove drm_modeset_(un)lock_all()
> > > > >   - Fix build problems in non-x86 platforms
> > > > > 
> > > > > Fernando Ramos (17):
> > > > >   drm: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > > >   drm/i915: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > > >   drm/msm: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > > >   drm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() drm/vmwgfx: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > > >   drm/tegra: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > > >   drm/shmobile: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > > >   drm/radeon: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > > >   drm/omapdrm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > > >   drm/nouveau: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > > >   drm/msm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > > >   drm/i915: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > > >   drm/i915: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() part 2
> > > > >   drm/gma500: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > > >   drm/amd: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()
> > > > >   drm: cleanup: remove drm_modeset_(un)lock_all()
> > > > >   doc: drm: remove TODO entry regarding DRM_MODSET_LOCK_ALL cleanup
> > > > > 
> > > > 
> > > > Thank you for revising, Fernando! I've pushed the set to drm-misc-next (along
> > > > with the necessary drm-tip conflict resolutions).
> > > 
> > > Ugh. Did anyone actually review the locking changes this does?
> > > I shot the previous i915 stuff down because the commit messages
> > > did not address any of it.
> > 
> > I reviewed the set on 9/17, I didn't see your feedback on that thread.
> 
> It was much earlir than that.
> https://lists.freedesktop.org/archives/dri-devel/2021-June/313193.html
> 
> And I think I might have also shot down a similar thing earlier.
> 
> I was actually half considering sending a patch to nuke that
> misleading TODO item. I don't think anything which changes
> which locks are taken should be considred a starter level task.
> And the commit messages here don't seem to address any of it.

And i915 is now broken :(

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10680/fi-bwr-2160/boot.html

-- 
Ville Syrjälä
Intel

^ permalink raw reply	[flat|nested] 29+ messages in thread

* Re: [Nouveau] [Intel-gfx] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible
  2021-10-02  2:30         ` [Nouveau] [Intel-gfx] " Ville Syrjälä
@ 2021-10-02  7:13           ` Fernando Ramos
  2021-10-02 17:28             ` Fernando Ramos
  2021-10-02 22:32             ` Fernando Ramos
  0 siblings, 2 replies; 29+ messages in thread
From: Fernando Ramos @ 2021-10-02  7:13 UTC (permalink / raw)
  To: Ville Syrjälä
  Cc: Sean Paul, dri-devel, linux-kernel, linux-doc, amd-gfx,
	intel-gfx, linux-arm-msm, freedreno, nouveau, linux-renesas-soc,
	linux-tegra

On 21/10/02 05:30AM, Ville Syrjälä wrote:
> On Sat, Oct 02, 2021 at 01:05:47AM +0300, Ville Syrjälä wrote:
> > On Fri, Oct 01, 2021 at 04:48:15PM -0400, Sean Paul wrote:
> > > On Fri, Oct 01, 2021 at 10:00:50PM +0300, Ville Syrjälä wrote:
> > > > On Fri, Oct 01, 2021 at 02:36:55PM -0400, Sean Paul wrote:
> > > > > 
> > > > > Thank you for revising, Fernando! I've pushed the set to drm-misc-next (along
> > > > > with the necessary drm-tip conflict resolutions).
> > > > 
> > > > Ugh. Did anyone actually review the locking changes this does?
> > > > I shot the previous i915 stuff down because the commit messages
> > > > did not address any of it.
> > > 
> > > I reviewed the set on 9/17, I didn't see your feedback on that thread.
> > 
> > It was much earlir than that.
> > https://lists.freedesktop.org/archives/dri-devel/2021-June/313193.html
> > 
> > And I think I might have also shot down a similar thing earlier.
> > 
> > I was actually half considering sending a patch to nuke that
> > misleading TODO item. I don't think anything which changes
> > which locks are taken should be considred a starter level task.
> > And the commit messages here don't seem to address any of it.
> 
> And i915 is now broken :(
> 
> https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_10680/fi-bwr-2160/boot.html

I completely overlooked the side effects of not having a global context anymore.
Sorry for all the trouble.

Sean, could you revert the whole patch series? I'll have a deeper look into the
patch set and come up with a v3 where all these issues will be addressed.

Thanks and sorry once again for the extra overhead this might have caused.



^ permalink raw reply	[flat|nested] 29+ messages in thread

* Re: [Nouveau] [Intel-gfx] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible
  2021-10-02  7:13           ` Fernando Ramos
@ 2021-10-02 17:28             ` Fernando Ramos
  2021-10-04  8:01               ` Ville Syrjälä
  2021-10-02 22:32             ` Fernando Ramos
  1 sibling, 1 reply; 29+ messages in thread
From: Fernando Ramos @ 2021-10-02 17:28 UTC (permalink / raw)
  To: Ville Syrjälä
  Cc: Sean Paul, dri-devel, linux-kernel, linux-doc, amd-gfx,
	intel-gfx, linux-arm-msm, freedreno, nouveau, linux-renesas-soc,
	linux-tegra

On 21/10/02 09:13AM, Fernando Ramos wrote:
> On 21/10/02 05:30AM, Ville Syrjälä wrote:
> > On Sat, Oct 02, 2021 at 01:05:47AM +0300, Ville Syrjälä wrote:
> > > On Fri, Oct 01, 2021 at 04:48:15PM -0400, Sean Paul wrote:
> > > > On Fri, Oct 01, 2021 at 10:00:50PM +0300, Ville Syrjälä wrote:
> > > > > On Fri, Oct 01, 2021 at 02:36:55PM -0400, Sean Paul wrote:
> > > > > > 
> > > > > > Thank you for revising, Fernando! I've pushed the set to drm-misc-next (along
> > > > > > with the necessary drm-tip conflict resolutions).
> > > > > 
> > > > > Ugh. Did anyone actually review the locking changes this does?
> > > > > I shot the previous i915 stuff down because the commit messages
> > > > > did not address any of it.
> > > > 
> > > > I reviewed the set on 9/17, I didn't see your feedback on that thread.
> > > 
> > > It was much earlir than that.
> > > https://lists.freedesktop.org/archives/dri-devel/2021-June/313193.html

Sorry, I'm new to this and it did not occur to me to search for similar patches
in the mailing list archives in case there were additional comments that applied
to my change set.

In case I had done that I would have found that, as you mentioned, you had
already raised two issues back in June:

    On Tue, Jun 29, 2021, Ville Syrjälä wrote:
    >
    > That looks wrong. You're using a private ctx here, but still
    > passing dev->mode_config.acquire_ctx to the lower level stuff.
    > 
    > Also DRM_MODESET_LOCK_ALL_{BEGIN,END}() do not seem to be
    > equivalent to drm_modeset_{lock,unlock}_all() when it comes to 
    > mode_config.mutex. So would need a proper review whether we
    > actually need that lock or not.

The first one was pointing out the same error I would later repeat in my patch
series (ups).

After further inspection of the code it looks to me that changing this:

    intel_modeset_setup_hw_state(dev, dev->mode_config.acquire_ctx);

...into this:

    intel_modeset_setup_hw_state(dev, &ctx);

...would be enough.

Why? The only difference between the old drm_modeset_{lock,unlock}_all()
functions and the new DRM_MODESET_LOCK_ALL_{BEGIN,END}() macros is that the
former use a global context stored in dev->mode_config.acquire_ctx while the
latter depend on a user provided one (typically in the stack).

In the old (working) code the global context structure is freed in
drm_modeset_unlock_all() thus we are sure no one is holding a reference to it at
that point. This means that as long as no one accesses the global
dev->mode_config.acquire_ctx context in the block that runs between lock/BEGIN
and unlock/END, the code should be equivalent before and after my changes.

In fact, now that my patch series removes the drm_modeset_{lock,unlock}_all()
functions, the acquire_ctx field of the drm_mode_config structure should be
deleted:

    /**
     * @acquire_ctx:
     *
     * Global implicit acquire context used by atomic drivers for legacy
     * IOCTLs. Deprecated, since implicit locking contexts make it
     * impossible to use driver-private &struct drm_modeset_lock. Users of
     * this must hold @mutex.
     */
    struct drm_modeset_acquire_ctx *acquire_ctx;

If I had done that (ie. removing this field) I would have detected the problem
when compiling.

There is another place (in the amdgpu driver) where this field is still being
referenced, but before I investigate that I would like to know if you agree that
this is a good path to follow.

Regarding the second issue you raised...

    > Also DRM_MODESET_LOCK_ALL_{BEGIN,END}() do not seem to be
    > equivalent to drm_modeset_{lock,unlock}_all() when it comes to 
    > mode_config.mutex. So would need a proper review whether we
    > actually need that lock or not.

...the only difference regarding mode_config.mutex I see is that in the new
macros the mutex is locked only under this condition:

    if (!drm_drv_uses_atomic_modeset(dev))

...which seems reasonable, right? Is this what you were referring to or is it
something else?

Please let me know what you think.

Thanks!




^ permalink raw reply	[flat|nested] 29+ messages in thread

* Re: [Nouveau] [Intel-gfx] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible
  2021-10-02  7:13           ` Fernando Ramos
  2021-10-02 17:28             ` Fernando Ramos
@ 2021-10-02 22:32             ` Fernando Ramos
  2021-10-04  8:19               ` Ville Syrjälä
  1 sibling, 1 reply; 29+ messages in thread
From: Fernando Ramos @ 2021-10-02 22:32 UTC (permalink / raw)
  To: Ville Syrjälä
  Cc: Sean Paul, dri-devel, linux-kernel, linux-doc, amd-gfx,
	intel-gfx, linux-arm-msm, freedreno, nouveau, linux-renesas-soc,
	linux-tegra

On 21/10/02 09:13AM, Fernando Ramos wrote:
> 
> Sean, could you revert the whole patch series? I'll have a deeper look into the
> patch set and come up with a v3 where all these issues will be addressed.
> 

Hi Sean,

I now understand the nature of the issue that caused the problem with i915 and
have proceed to remove the global context structure (which revealed a similar
issue in the amdgpu driver).

I have prepared a V3 version of the patch set where these issues should
hopefully be fixed for both the i915 and amdgpu drivers.

In order to prevent causing more disruption, could you tell me what the proper
way to proceed would be? In particular:

  1. Is there any place where I can push my changes so that they are tested
     on a i915 machine? (Some type of automated pool)

  2. I can test the amdgpu driver on my machine but, what about all the other
     architectures? What is the standard procedure? Should I simply publish V3
     and wait for feedback from the different vendors? (I would hate to cause a
     simular situation again)

  3. Should I post V3 on top of drm-next or drm-misc-next?

Thanks for your patience :)

^ permalink raw reply	[flat|nested] 29+ messages in thread

* Re: [Nouveau] [Intel-gfx] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible
  2021-10-02 17:28             ` Fernando Ramos
@ 2021-10-04  8:01               ` Ville Syrjälä
  0 siblings, 0 replies; 29+ messages in thread
From: Ville Syrjälä @ 2021-10-04  8:01 UTC (permalink / raw)
  To: Fernando Ramos
  Cc: Sean Paul, dri-devel, linux-kernel, linux-doc, amd-gfx,
	intel-gfx, linux-arm-msm, freedreno, nouveau, linux-renesas-soc,
	linux-tegra

On Sat, Oct 02, 2021 at 07:28:02PM +0200, Fernando Ramos wrote:
> On 21/10/02 09:13AM, Fernando Ramos wrote:
> > On 21/10/02 05:30AM, Ville Syrjälä wrote:
> > > On Sat, Oct 02, 2021 at 01:05:47AM +0300, Ville Syrjälä wrote:
> > > > On Fri, Oct 01, 2021 at 04:48:15PM -0400, Sean Paul wrote:
> > > > > On Fri, Oct 01, 2021 at 10:00:50PM +0300, Ville Syrjälä wrote:
> > > > > > On Fri, Oct 01, 2021 at 02:36:55PM -0400, Sean Paul wrote:
> > > > > > > 
> > > > > > > Thank you for revising, Fernando! I've pushed the set to drm-misc-next (along
> > > > > > > with the necessary drm-tip conflict resolutions).
> > > > > > 
> > > > > > Ugh. Did anyone actually review the locking changes this does?
> > > > > > I shot the previous i915 stuff down because the commit messages
> > > > > > did not address any of it.
> > > > > 
> > > > > I reviewed the set on 9/17, I didn't see your feedback on that thread.
> > > > 
> > > > It was much earlir than that.
> > > > https://lists.freedesktop.org/archives/dri-devel/2021-June/313193.html
> 
> Sorry, I'm new to this and it did not occur to me to search for similar patches
> in the mailing list archives in case there were additional comments that applied
> to my change set.
> 
> In case I had done that I would have found that, as you mentioned, you had
> already raised two issues back in June:
> 
>     On Tue, Jun 29, 2021, Ville Syrjälä wrote:
>     >
>     > That looks wrong. You're using a private ctx here, but still
>     > passing dev->mode_config.acquire_ctx to the lower level stuff.
>     > 
>     > Also DRM_MODESET_LOCK_ALL_{BEGIN,END}() do not seem to be
>     > equivalent to drm_modeset_{lock,unlock}_all() when it comes to 
>     > mode_config.mutex. So would need a proper review whether we
>     > actually need that lock or not.
> 
> The first one was pointing out the same error I would later repeat in my patch
> series (ups).
> 
> After further inspection of the code it looks to me that changing this:
> 
>     intel_modeset_setup_hw_state(dev, dev->mode_config.acquire_ctx);
> 
> ...into this:
> 
>     intel_modeset_setup_hw_state(dev, &ctx);
> 
> ...would be enough.

Yes.

> 
> Why? The only difference between the old drm_modeset_{lock,unlock}_all()
> functions and the new DRM_MODESET_LOCK_ALL_{BEGIN,END}() macros is that the
> former use a global context stored in dev->mode_config.acquire_ctx while the
> latter depend on a user provided one (typically in the stack).
> 
> In the old (working) code the global context structure is freed in
> drm_modeset_unlock_all() thus we are sure no one is holding a reference to it at
> that point. This means that as long as no one accesses the global
> dev->mode_config.acquire_ctx context in the block that runs between lock/BEGIN
> and unlock/END, the code should be equivalent before and after my changes.
> 
> In fact, now that my patch series removes the drm_modeset_{lock,unlock}_all()
> functions, the acquire_ctx field of the drm_mode_config structure should be
> deleted:
> 
>     /**
>      * @acquire_ctx:
>      *
>      * Global implicit acquire context used by atomic drivers for legacy
>      * IOCTLs. Deprecated, since implicit locking contexts make it
>      * impossible to use driver-private &struct drm_modeset_lock. Users of
>      * this must hold @mutex.
>      */
>     struct drm_modeset_acquire_ctx *acquire_ctx;
> 
> If I had done that (ie. removing this field) I would have detected the problem
> when compiling.
> 
> There is another place (in the amdgpu driver) where this field is still being
> referenced, but before I investigate that I would like to know if you agree that
> this is a good path to follow.

Yeah, removing the mode_config.acquire_ctx is a good idea if it's
no longer needed.

> 
> Regarding the second issue you raised...
> 
>     > Also DRM_MODESET_LOCK_ALL_{BEGIN,END}() do not seem to be
>     > equivalent to drm_modeset_{lock,unlock}_all() when it comes to 
>     > mode_config.mutex. So would need a proper review whether we
>     > actually need that lock or not.
> 
> ...the only difference regarding mode_config.mutex I see is that in the new
> macros the mutex is locked only under this condition:
> 
>     if (!drm_drv_uses_atomic_modeset(dev))
> 
> ...which seems reasonable, right? Is this what you were referring to or is it
> something else?

In order to eliminate the lock one first has to determine what that lock
might be protecting here, and then prove that such protection is not
actually needed.

-- 
Ville Syrjälä
Intel

^ permalink raw reply	[flat|nested] 29+ messages in thread

* Re: [Nouveau] [Intel-gfx] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible
  2021-10-02 22:32             ` Fernando Ramos
@ 2021-10-04  8:19               ` Ville Syrjälä
  2021-10-04  8:39                 ` Jani Nikula
  0 siblings, 1 reply; 29+ messages in thread
From: Ville Syrjälä @ 2021-10-04  8:19 UTC (permalink / raw)
  To: Fernando Ramos
  Cc: Sean Paul, dri-devel, linux-kernel, linux-doc, amd-gfx,
	intel-gfx, linux-arm-msm, freedreno, nouveau, linux-renesas-soc,
	linux-tegra

On Sun, Oct 03, 2021 at 12:32:14AM +0200, Fernando Ramos wrote:
> On 21/10/02 09:13AM, Fernando Ramos wrote:
> > 
> > Sean, could you revert the whole patch series? I'll have a deeper look into the
> > patch set and come up with a v3 where all these issues will be addressed.
> > 
> 
> Hi Sean,
> 
> I now understand the nature of the issue that caused the problem with i915 and
> have proceed to remove the global context structure (which revealed a similar
> issue in the amdgpu driver).
> 
> I have prepared a V3 version of the patch set where these issues should
> hopefully be fixed for both the i915 and amdgpu drivers.
> 
> In order to prevent causing more disruption, could you tell me what the proper
> way to proceed would be? In particular:
> 
>   1. Is there any place where I can push my changes so that they are tested
>      on a i915 machine? (Some type of automated pool)

cc:intel-gfx, which it looks like you did, _but_ your patches did
did not even apply against drm-tip so our CI rejected it. There was
a reply to the patches from CI indicating that. And that is one
reason I probably just ignored the whole thing. If it doesn't
even apply/build it's not worth my time to read.

> 
>   2. I can test the amdgpu driver on my machine but, what about all the other
>      architectures? What is the standard procedure? Should I simply publish V3
>      and wait for feedback from the different vendors? (I would hate to cause a
>      simular situation again)
> 
>   3. Should I post V3 on top of drm-next or drm-misc-next?

The normal rule is: always work on drm-tip. That is what gets
tested by our CI as well. Yes, it does mean a bit of extra hurdles
during development since drm-tip is a rebasing tree, but there are
tools like dim retip to help out here.

As for where to merge them. I would generally recommed against merging
i915 patches through drm-misc unless there is a very compelling reason
to do so. i915 is a fast moving target and if there are significant
changes coming in via drm-misc they usually will cause conflicts for
people during drm-tip rebuild. Also I would expect to see an ack
requested from i915 maintainers for merging anything significant via
drm-misc, which I don't think happened in this case.

-- 
Ville Syrjälä
Intel

^ permalink raw reply	[flat|nested] 29+ messages in thread

* Re: [Nouveau] [Intel-gfx] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible
  2021-10-04  8:19               ` Ville Syrjälä
@ 2021-10-04  8:39                 ` Jani Nikula
  0 siblings, 0 replies; 29+ messages in thread
From: Jani Nikula @ 2021-10-04  8:39 UTC (permalink / raw)
  To: Ville Syrjälä, Fernando Ramos
  Cc: Sean Paul, dri-devel, linux-kernel, linux-doc, amd-gfx,
	intel-gfx, linux-arm-msm, freedreno, nouveau, linux-renesas-soc,
	linux-tegra

On Mon, 04 Oct 2021, Ville Syrjälä <ville.syrjala@linux.intel.com> wrote:
> On Sun, Oct 03, 2021 at 12:32:14AM +0200, Fernando Ramos wrote:
>> On 21/10/02 09:13AM, Fernando Ramos wrote:
>> > 
>> > Sean, could you revert the whole patch series? I'll have a deeper look into the
>> > patch set and come up with a v3 where all these issues will be addressed.
>> > 
>> 
>> Hi Sean,
>> 
>> I now understand the nature of the issue that caused the problem with i915 and
>> have proceed to remove the global context structure (which revealed a similar
>> issue in the amdgpu driver).
>> 
>> I have prepared a V3 version of the patch set where these issues should
>> hopefully be fixed for both the i915 and amdgpu drivers.
>> 
>> In order to prevent causing more disruption, could you tell me what the proper
>> way to proceed would be? In particular:
>> 
>>   1. Is there any place where I can push my changes so that they are tested
>>      on a i915 machine? (Some type of automated pool)
>
> cc:intel-gfx, which it looks like you did, _but_ your patches did
> did not even apply against drm-tip so our CI rejected it. There was
> a reply to the patches from CI indicating that. And that is one
> reason I probably just ignored the whole thing. If it doesn't
> even apply/build it's not worth my time to read.
>
>> 
>>   2. I can test the amdgpu driver on my machine but, what about all the other
>>      architectures? What is the standard procedure? Should I simply publish V3
>>      and wait for feedback from the different vendors? (I would hate to cause a
>>      simular situation again)
>> 
>>   3. Should I post V3 on top of drm-next or drm-misc-next?
>
> The normal rule is: always work on drm-tip. That is what gets
> tested by our CI as well. Yes, it does mean a bit of extra hurdles
> during development since drm-tip is a rebasing tree, but there are
> tools like dim retip to help out here.
>
> As for where to merge them. I would generally recommed against merging
> i915 patches through drm-misc unless there is a very compelling reason
> to do so. i915 is a fast moving target and if there are significant
> changes coming in via drm-misc they usually will cause conflicts for
> people during drm-tip rebuild. Also I would expect to see an ack
> requested from i915 maintainers for merging anything significant via
> drm-misc, which I don't think happened in this case.

Indeed. All other things aside, it looks like it has enough conflict
potential to warrant merging via drm-intel anyway.

BR,
Jani.


-- 
Jani Nikula, Intel Open Source Graphics Center

^ permalink raw reply	[flat|nested] 29+ messages in thread

end of thread, other threads:[~2021-10-04  8:40 UTC | newest]

Thread overview: 29+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-09-24  6:43 [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible Fernando Ramos
2021-09-24  6:43 ` [Nouveau] [PATCH v2 01/17] drm: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN() Fernando Ramos
2021-09-24  6:43 ` [Nouveau] [PATCH v2 02/17] drm/i915: " Fernando Ramos
2021-09-24  6:43 ` [Nouveau] [PATCH v2 03/17] drm/msm: " Fernando Ramos
2021-09-24  6:43 ` [Nouveau] [PATCH v2 04/17] drm: cleanup: drm_modeset_lock_all() " Fernando Ramos
2021-09-24  6:43 ` [Nouveau] [PATCH v2 05/17] drm/vmwgfx: " Fernando Ramos
2021-09-24  6:43 ` [Nouveau] [PATCH v2 06/17] drm/tegra: " Fernando Ramos
2021-09-24  6:43 ` [Nouveau] [PATCH v2 07/17] drm/shmobile: " Fernando Ramos
2021-09-24  6:43 ` [Nouveau] [PATCH v2 08/17] drm/radeon: " Fernando Ramos
2021-09-24  6:43 ` [Nouveau] [PATCH v2 09/17] drm/omapdrm: " Fernando Ramos
2021-09-24  6:43 ` [Nouveau] [PATCH v2 10/17] drm/nouveau: " Fernando Ramos
2021-09-24  6:43 ` [Nouveau] [PATCH v2 11/17] drm/msm: " Fernando Ramos
2021-09-24  6:43 ` [Nouveau] [PATCH v2 12/17] drm/i915: " Fernando Ramos
2021-09-24  6:43 ` [Nouveau] [PATCH v2 13/17] drm/i915: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() part 2 Fernando Ramos
2021-09-24  6:43 ` [Nouveau] [PATCH v2 14/17] drm/gma500: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() Fernando Ramos
2021-09-24  6:43 ` [Nouveau] [PATCH v2 15/17] drm/amd: " Fernando Ramos
2021-09-24  6:43 ` [Nouveau] [PATCH v2 16/17] drm: cleanup: remove drm_modeset_(un)lock_all() Fernando Ramos
2021-09-24  6:43 ` [Nouveau] [PATCH v2 17/17] doc: drm: remove TODO entry regarding DRM_MODSET_LOCK_ALL cleanup Fernando Ramos
2021-10-01 18:36 ` [Nouveau] [PATCH v2 00/17] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers where possible Sean Paul
2021-10-01 19:00   ` Ville Syrjälä
2021-10-01 20:48     ` Sean Paul
2021-10-01 22:05       ` Ville Syrjälä
2021-10-02  2:30         ` [Nouveau] [Intel-gfx] " Ville Syrjälä
2021-10-02  7:13           ` Fernando Ramos
2021-10-02 17:28             ` Fernando Ramos
2021-10-04  8:01               ` Ville Syrjälä
2021-10-02 22:32             ` Fernando Ramos
2021-10-04  8:19               ` Ville Syrjälä
2021-10-04  8:39                 ` Jani Nikula

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