[PATCH v4 00/20] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers

[PATCH v4 00/20] drm: cleanup: Use DRM_MODESET_LOCK_ALL_* helpers

[Fernando Ramos]

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

Changes in v3:
  - Fix in drm/i915 driver to make sure global context is no longer used
  - Fix in drm/amdgpu driver to make sure global context is no longer used
  - Split amdgpu driver to make it easier to understand
  - Remove acquire_ctx from drm_mode_config 
  - Rebase on top of drm-tip
  - WARNING: There is some discussion going on regarding whether the new macros
    should be used (or not) in the i915 driver, as a different set of functions
    has been proposed in the past (see here:
    https://lore.kernel.org/dri-devel/YVriZxCeipBUgc8O@intel.com/).
    In that case I will need to create a v4 where i915 files are left unchanged.
    Let me know your thoughts regarding this.

Changes in v4:
  - Fix missing "Signed-off-by" in one commit
  - No extra comments received in one week
  - Rebase on top of drm-tip

Fernando Ramos (20):
  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/i915: cleanup: drm_modeset_lock_all() -->
    DRM_MODESET_LOCK_ALL_BEGIN() [part 3]
  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/amd: cleanup: drm_modeset_lock_all() -->
    DRM_MODESET_LOCK_ALL_BEGIN() [part 2]
  drm/amd: cleanup: drm_modeset_lock_all() -->
    DRM_MODESET_LOCK_ALL_BEGIN() [part 3]
  drm: cleanup: remove drm_modeset_(un)lock_all()
  drm: cleanup: remove acquire_ctx from drm_mode_config

 drivers/gpu/drm/amd/amdgpu/amdgpu_display.c   | 21 +++--
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 58 ++++++------
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h |  3 +-
 .../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  | 25 ++---
 .../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_mode_config.h                 | 10 --
 include/drm/drm_modeset_lock.h                |  2 -
 30 files changed, 272 insertions(+), 289 deletions(-)


base-commit: 3fdfa1de4774903b9cb4fb308102b5a2d762d829
-- 
2.33.0

[PATCH v4 01/20] drm: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()

[Fernando Ramos]

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

[PATCH v4 02/20] drm/i915: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()

[Fernando Ramos]

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 9cf987ee143d..c7d9a58f9f98 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"
@@ -11923,22 +11924,13 @@ 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

[PATCH v4 03/20] drm/msm: cleanup: drm_modeset_lock_all_ctx() --> DRM_MODESET_LOCK_ALL_BEGIN()

[Fernando Ramos]

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

[PATCH v4 04/20] drm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()

[Fernando Ramos]

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 8e7a124d6c5a..3b5661cf6c2b 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

[PATCH v4 05/20] drm/vmwgfx: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()

[Fernando Ramos]

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

[PATCH v4 06/20] drm/tegra: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()

[Fernando Ramos]

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

[PATCH v4 07/20] drm/shmobile: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()

[Fernando Ramos]

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 80078a9fd7f6..1877feff2e6b 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

[PATCH v4 08/20] drm/radeon: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()

[Fernando Ramos]

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

[PATCH v4 09/20] drm/omapdrm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()

[Fernando Ramos]

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

[PATCH v4 10/20] drm/nouveau: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()

[Fernando Ramos]

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

[PATCH v4 11/20] drm/msm: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()

[Fernando Ramos]

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

[PATCH v4 12/20] drm/i915: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()

[Fernando Ramos]

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 ++++---
 .../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 ++++--
 5 files changed, 58 insertions(+), 30 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_audio.c b/drivers/gpu/drm/i915/display/intel_audio.c
index 03e8c05a74f6..37699f13b21f 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"
@@ -1225,7 +1226,8 @@ 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;
@@ -1235,16 +1237,16 @@ 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,
@@ -1252,12 +1254,14 @@ 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_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
index bc5113589f0a..3205ceb0ab70 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_de.h"
@@ -1059,11 +1060,13 @@ 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");
@@ -1078,20 +1081,21 @@ 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,
@@ -1134,9 +1138,9 @@ 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)
@@ -1195,13 +1199,15 @@ 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");
 
@@ -1225,9 +1231,9 @@ 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,
@@ -1305,10 +1311,12 @@ 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++;
@@ -1317,7 +1325,7 @@ 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");
@@ -1594,8 +1602,10 @@ 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;
@@ -1606,7 +1616,7 @@ 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];
@@ -1627,7 +1637,7 @@ 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)
@@ -1711,6 +1721,7 @@ 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;
@@ -1740,12 +1751,15 @@ 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 c65c3742887a..298a5b12e882 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"
@@ -1010,31 +1011,35 @@ 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

[PATCH v4 13/20] drm/i915: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() [part 2]

[Fernando Ramos]

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()

NOTE:

I separated this change from the rest of modifications to the i915
driver to point out something special explained next.

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).

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.

The only place where I had to take special action to preserve this
condition was here, where I need to modify the old call to
intel_modeset_setup_hw_state() to use the new stack allocated context
structure instead of the global one.

Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
---
 drivers/gpu/drm/i915/display/intel_display.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index c7d9a58f9f98..75b45c01c573 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -10992,6 +10992,7 @@ 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;
@@ -11043,10 +11044,10 @@ int intel_modeset_init_nogem(struct drm_i915_private *i915)
 	intel_vga_disable(i915);
 	intel_setup_outputs(i915);
 
-	drm_modeset_lock_all(dev);
-	intel_modeset_setup_hw_state(dev, dev->mode_config.acquire_ctx);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
+	intel_modeset_setup_hw_state(dev, &ctx);
 	intel_acpi_assign_connector_fwnodes(i915);
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 
 	for_each_intel_crtc(dev, crtc) {
 		if (!to_intel_crtc_state(crtc->base.state)->uapi.active)
-- 
2.33.0

[PATCH v4 14/20] drm/i915: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() [part 3]

[Fernando Ramos]

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()

NOTE:

While the previous two commits were 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

[PATCH v4 15/20] drm/gma500: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()

[Fernando Ramos]

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 3030f18ba022..021a7238508f 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 = to_drm_psb_private(dev);
 	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 = to_drm_psb_private(dev);
 	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

[PATCH v4 16/20] drm/amd: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()

[Fernando Ramos]

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 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
index dc50c05f23fc..0ea7bdbc8482 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)
@@ -1574,16 +1575,21 @@ 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);
@@ -1621,7 +1627,8 @@ 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) {
@@ -1643,7 +1650,7 @@ 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)
@@ -1651,8 +1658,8 @@ 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;
 }
 
-- 
2.33.0

[PATCH v4 17/20] drm/amd: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() [part 2]

[Fernando Ramos]

Refactor places using drm_modeset_{lock,unlock}_all() so that they only
appear once per function.

This is needed so that in the next commit I can replace those functions
by the new macros (which use labels that can only appear once per
function).

Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 43 ++++++++-----------
 .../amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 18 +++-----
 2 files changed, 26 insertions(+), 35 deletions(-)

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 f35561b5a465..10ed1f8ad514 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2935,13 +2935,6 @@ static void handle_hpd_irq_helper(struct amdgpu_dm_connector *aconnector)
 	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 &&
@@ -2950,13 +2943,18 @@ static void handle_hpd_irq_helper(struct amdgpu_dm_connector *aconnector)
 
 		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(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);
+
+out:
 	mutex_unlock(&aconnector->hpd_lock);
 
 }
@@ -3144,12 +3142,6 @@ 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)
@@ -3157,14 +3149,17 @@ 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(dev);
+		dm_restore_drm_connector_state(dev, connector);
+		drm_modeset_unlock_all(dev);
 
-			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 814f67d86a3c..7751038d5788 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
@@ -1237,12 +1237,6 @@ 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;
@@ -1260,13 +1254,15 @@ 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(dev);
+	dm_restore_drm_connector_state(dev, connector);
+	drm_modeset_unlock_all(dev);
+	drm_kms_helper_hotplug_event(dev);
+
 unlock:
 	mutex_unlock(&aconnector->hpd_lock);
 
-- 
2.33.0

[PATCH v4 18/20] drm/amd: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN() [part 3]

[Fernando Ramos]

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()

NOTE:

While this change is similar to the one done two commits ago, it
contains an important extra nuances that I'm going to explain next.

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).

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.

Turns out that, while not obvious at first sight, the call to
dm_restore_drm_connector_state() done between drm_modset_lock_all() and
drm_modeset_unlock_all() ends up using that global context structure
stored in dev.

To fix this we need to update some function prototypes to accept the
new stack allocated variable as an argument.

Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 27 ++++++++++++-------
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h |  3 ++-
 .../amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 13 ++++++---
 3 files changed, 29 insertions(+), 14 deletions(-)

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 10ed1f8ad514..7a3c5def9fb9 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -81,6 +81,7 @@
 #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"
@@ -2906,6 +2907,8 @@ static void handle_hpd_irq_helper(struct amdgpu_dm_connector *aconnector)
 	struct amdgpu_device *adev = drm_to_adev(dev);
 	struct dm_connector_state *dm_con_state = to_dm_connector_state(connector->state);
 	struct dm_crtc_state *dm_crtc_state = NULL;
+	struct drm_modeset_acquire_ctx ctx;
+	int ret;
 
 	if (adev->dm.disable_hpd_irq)
 		return;
@@ -2947,9 +2950,9 @@ static void handle_hpd_irq_helper(struct amdgpu_dm_connector *aconnector)
 		goto out;
 	}
 
-	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, &ctx);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 
 	if (aconnector->base.force == DRM_FORCE_UNSPECIFIED)
 		drm_kms_helper_hotplug_event(dev);
@@ -3070,6 +3073,7 @@ 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;
@@ -3079,6 +3083,7 @@ static void handle_hpd_rx_irq(void *param)
 	bool has_left_work = false;
 	int idx = aconnector->base.index;
 	struct hpd_rx_irq_offload_work_queue *offload_wq = &adev->dm.hpd_rx_offload_wq[idx];
+	int ret;
 
 	memset(&hpd_irq_data, 0, sizeof(hpd_irq_data));
 
@@ -3153,9 +3158,9 @@ static void handle_hpd_rx_irq(void *param)
 			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, &ctx);
+		DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 
 		drm_kms_helper_hotplug_event(dev);
 	}
@@ -9703,7 +9708,8 @@ static void amdgpu_dm_atomic_commit_tail(struct drm_atomic_state *state)
 }
 
 
-static int dm_force_atomic_commit(struct drm_connector *connector)
+static int dm_force_atomic_commit(struct drm_connector *connector,
+				  struct drm_modeset_acquire_ctx *ctx)
 {
 	int ret = 0;
 	struct drm_device *ddev = connector->dev;
@@ -9717,7 +9723,7 @@ static int dm_force_atomic_commit(struct drm_connector *connector)
 	if (!state)
 		return -ENOMEM;
 
-	state->acquire_ctx = ddev->mode_config.acquire_ctx;
+	state->acquire_ctx = ctx;
 
 	/* Construct an atomic state to restore previous display setting */
 
@@ -9764,7 +9770,8 @@ static int dm_force_atomic_commit(struct drm_connector *connector)
  * same port and when running without usermode desktop manager supprot
  */
 void dm_restore_drm_connector_state(struct drm_device *dev,
-				    struct drm_connector *connector)
+				    struct drm_connector *connector,
+				    struct drm_modeset_acquire_ctx *ctx)
 {
 	struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
 	struct amdgpu_crtc *disconnected_acrtc;
@@ -9787,7 +9794,7 @@ void dm_restore_drm_connector_state(struct drm_device *dev,
 	 * to turn on the display, so we do it here
 	 */
 	if (acrtc_state->stream->sink != aconnector->dc_sink)
-		dm_force_atomic_commit(&aconnector->base);
+		dm_force_atomic_commit(&aconnector->base, ctx);
 }
 
 /*
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
index 37e61a88d49e..1a7c8fbf149a 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
@@ -706,7 +706,8 @@ enum drm_mode_status amdgpu_dm_connector_mode_valid(struct drm_connector *connec
 				   struct drm_display_mode *mode);
 
 void dm_restore_drm_connector_state(struct drm_device *dev,
-				    struct drm_connector *connector);
+				    struct drm_connector *connector,
+				    struct drm_modeset_acquire_ctx *ctx);
 
 void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
 					struct edid *edid);
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 7751038d5788..f4542760b006 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"
@@ -1192,12 +1193,14 @@ 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;
@@ -1258,9 +1261,13 @@ static ssize_t trigger_hotplug(struct file *f, const char __user *buf,
 		goto unlock;
 	}
 
-	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, &ctx);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
+
+	if (ret)
+		return ret;
+
 	drm_kms_helper_hotplug_event(dev);
 
 unlock:
-- 
2.33.0

[PATCH v4 19/20] drm: cleanup: remove drm_modeset_(un)lock_all()

[Fernando Ramos]

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 4d32b61fa1fd..b2b84ca2b738 100644
--- a/drivers/gpu/drm/drm_modeset_lock.c
+++ b/drivers/gpu/drm/drm_modeset_lock.c
@@ -117,93 +117,6 @@ static void __stack_depot_print(depot_stack_handle_t stack_depot)
 }
 #endif /* CONFIG_DRM_DEBUG_MODESET_LOCK */
 
-/**
- * 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
@@ -425,10 +338,9 @@ 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 b84693fbd2b5..96b853530120 100644
--- a/include/drm/drm_modeset_lock.h
+++ b/include/drm/drm_modeset_lock.h
@@ -140,8 +140,6 @@ 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

[PATCH v4 20/20] drm: cleanup: remove acquire_ctx from drm_mode_config

[Fernando Ramos]

The previous patch removed drm_modeset_{lock,unlock}_all, which were the
only users of this field inside the drm_mode_config structure.

Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
---
 include/drm/drm_mode_config.h | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h
index 48b7de80daf5..b214b07157f2 100644
--- a/include/drm/drm_mode_config.h
+++ b/include/drm/drm_mode_config.h
@@ -383,16 +383,6 @@ struct drm_mode_config {
 	 */
 	struct drm_modeset_lock connection_mutex;
 
-	/**
-	 * @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;
-
 	/**
 	 * @idr_mutex:
 	 *
-- 
2.33.0