[2/4] drm: Create a format/modifier blob

Submitted by Ben Widawsky on July 24, 2017, 3:46 a.m.

Details

Message ID 20170724034641.13369-3-ben@bwidawsk.net
State Accepted
Commit db1689aa61bd1efb5ce9b896e7aa860a85b7f1b6
Headers show
Series "Blobifiers (FKA GET_PLANE2)" ( rev: 3 ) in Intel GFX

Not browsing as part of any series.

Commit Message

Ben Widawsky July 24, 2017, 3:46 a.m.
Updated blob layout (Rob, Daniel, Kristian, xerpi)

v2:
* Removed __packed, and alignment (.+)
* Fix indent in drm_format_modifier fields (Liviu)
* Remove duplicated modifier > 64 check (Liviu)
* Change comment about modifier (Liviu)
* Remove arguments to blob creation, use plane instead (Liviu)
* Fix data types (Ben)
* Make the blob part of uapi (Daniel)

v3:
Remove unused ret field.
Change i, and j to unsigned int (Emil)

v4:
Use plane->modifier_count instead of recounting (Daniel)

v5:
Rename modifiers to modifiers_property (Ville)
Use sizeof(__u32) instead to reflect UAPI nature (Ville)
Make BUILD_BUG_ON for blob header size

Cc: Rob Clark <robdclark@gmail.com>
Cc: Kristian H. Kristensen <hoegsberg@gmail.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Daniel Stone <daniels@collabora.com> (v2)
Reviewed-by: Liviu Dudau <liviu@dudau.co.uk> (v2)
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com> (v3)
---
 drivers/gpu/drm/drm_mode_config.c |  7 ++++
 drivers/gpu/drm/drm_plane.c       | 84 +++++++++++++++++++++++++++++++++++++++
 include/drm/drm_mode_config.h     |  6 +++
 include/uapi/drm/drm_mode.h       | 50 +++++++++++++++++++++++
 4 files changed, 147 insertions(+)

Patch hide | download patch | download mbox

diff --git a/drivers/gpu/drm/drm_mode_config.c b/drivers/gpu/drm/drm_mode_config.c
index d9862259a2a7..74f6ff5df656 100644
--- a/drivers/gpu/drm/drm_mode_config.c
+++ b/drivers/gpu/drm/drm_mode_config.c
@@ -337,6 +337,13 @@  static int drm_mode_create_standard_properties(struct drm_device *dev)
 		return -ENOMEM;
 	dev->mode_config.gamma_lut_size_property = prop;
 
+	prop = drm_property_create(dev,
+				   DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB,
+				   "IN_FORMATS", 0);
+	if (!prop)
+		return -ENOMEM;
+	dev->mode_config.modifiers_property = prop;
+
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
index d3fc561d7b48..5c14beee52ff 100644
--- a/drivers/gpu/drm/drm_plane.c
+++ b/drivers/gpu/drm/drm_plane.c
@@ -62,6 +62,87 @@  static unsigned int drm_num_planes(struct drm_device *dev)
 	return num;
 }
 
+static inline u32 *
+formats_ptr(struct drm_format_modifier_blob *blob)
+{
+	return (u32 *)(((char *)blob) + blob->formats_offset);
+}
+
+static inline struct drm_format_modifier *
+modifiers_ptr(struct drm_format_modifier_blob *blob)
+{
+	return (struct drm_format_modifier *)(((char *)blob) + blob->modifiers_offset);
+}
+
+static int create_in_format_blob(struct drm_device *dev, struct drm_plane *plane)
+{
+	const struct drm_mode_config *config = &dev->mode_config;
+	struct drm_property_blob *blob;
+	struct drm_format_modifier *mod;
+	size_t blob_size, formats_size, modifiers_size;
+	struct drm_format_modifier_blob *blob_data;
+	unsigned int i, j;
+
+	formats_size = sizeof(__u32) * plane->format_count;
+	if (WARN_ON(!formats_size)) {
+		/* 0 formats are never expected */
+		return 0;
+	}
+
+	modifiers_size =
+		sizeof(struct drm_format_modifier) * plane->modifier_count;
+
+	blob_size = sizeof(struct drm_format_modifier_blob);
+	/* Modifiers offset is a pointer to a struct with a 64 bit field so it
+	 * should be naturally aligned to 8B.
+	 */
+	BUILD_BUG_ON(sizeof(struct drm_format_modifier_blob) % 8);
+	blob_size += ALIGN(formats_size, 8);
+	blob_size += modifiers_size;
+
+	blob = drm_property_create_blob(dev, blob_size, NULL);
+	if (IS_ERR(blob))
+		return -1;
+
+	blob_data = (struct drm_format_modifier_blob *)blob->data;
+	blob_data->version = FORMAT_BLOB_CURRENT;
+	blob_data->count_formats = plane->format_count;
+	blob_data->formats_offset = sizeof(struct drm_format_modifier_blob);
+	blob_data->count_modifiers = plane->modifier_count;
+
+	blob_data->modifiers_offset =
+		ALIGN(blob_data->formats_offset + formats_size, 8);
+
+	memcpy(formats_ptr(blob_data), plane->format_types, formats_size);
+
+	/* If we can't determine support, just bail */
+	if (!plane->funcs->format_mod_supported)
+		goto done;
+
+	mod = modifiers_ptr(blob_data);
+	for (i = 0; i < plane->modifier_count; i++) {
+		for (j = 0; j < plane->format_count; j++) {
+			if (plane->funcs->format_mod_supported(plane,
+							       plane->format_types[j],
+							       plane->modifiers[i])) {
+
+				mod->formats |= 1 << j;
+			}
+		}
+
+		mod->modifier = plane->modifiers[i];
+		mod->offset = 0;
+		mod->pad = 0;
+		mod++;
+	}
+
+done:
+	drm_object_attach_property(&plane->base, config->modifiers_property,
+				   blob->base.id);
+
+	return 0;
+}
+
 /**
  * drm_universal_plane_init - Initialize a new universal plane object
  * @dev: DRM device
@@ -181,6 +262,9 @@  int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane,
 		drm_object_attach_property(&plane->base, config->prop_src_h, 0);
 	}
 
+	if (config->allow_fb_modifiers)
+		create_in_format_blob(dev, plane);
+
 	return 0;
 }
 EXPORT_SYMBOL(drm_universal_plane_init);
diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h
index f0d3d3857ae2..5b379db1ea14 100644
--- a/include/drm/drm_mode_config.h
+++ b/include/drm/drm_mode_config.h
@@ -758,6 +758,12 @@  struct drm_mode_config {
 	 */
 	bool allow_fb_modifiers;
 
+	/**
+	 * @modifiers: Plane property to list support modifier/format
+	 * combination.
+	 */
+	struct drm_property *modifiers_property;
+
 	/* cursor size */
 	uint32_t cursor_width, cursor_height;
 
diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
index 403339f98a92..a2bb7161f020 100644
--- a/include/uapi/drm/drm_mode.h
+++ b/include/uapi/drm/drm_mode.h
@@ -712,6 +712,56 @@  struct drm_mode_atomic {
 	__u64 user_data;
 };
 
+struct drm_format_modifier_blob {
+#define FORMAT_BLOB_CURRENT 1
+	/* Version of this blob format */
+	u32 version;
+
+	/* Flags */
+	u32 flags;
+
+	/* Number of fourcc formats supported */
+	u32 count_formats;
+
+	/* Where in this blob the formats exist (in bytes) */
+	u32 formats_offset;
+
+	/* Number of drm_format_modifiers */
+	u32 count_modifiers;
+
+	/* Where in this blob the modifiers exist (in bytes) */
+	u32 modifiers_offset;
+
+	/* u32 formats[] */
+	/* struct drm_format_modifier modifiers[] */
+};
+
+struct drm_format_modifier {
+	/* Bitmask of formats in get_plane format list this info applies to. The
+	 * offset allows a sliding window of which 64 formats (bits).
+	 *
+	 * Some examples:
+	 * In today's world with < 65 formats, and formats 0, and 2 are
+	 * supported
+	 * 0x0000000000000005
+	 *		  ^-offset = 0, formats = 5
+	 *
+	 * If the number formats grew to 128, and formats 98-102 are
+	 * supported with the modifier:
+	 *
+	 * 0x0000003c00000000 0000000000000000
+	 *		  ^
+	 *		  |__offset = 64, formats = 0x3c00000000
+	 *
+	 */
+	__u64 formats;
+	__u32 offset;
+	__u32 pad;
+
+	/* The modifier that applies to the >get_plane format list bitmask. */
+	__u64 modifier;
+};
+
 /**
  * Create a new 'blob' data property, copying length bytes from data pointer,
  * and returning new blob ID.

Comments

Hi Ben,

[auto build test WARNING on drm/drm-next]
[also build test WARNING on v4.13-rc2 next-20170724]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Ben-Widawsky/drm-Plumb-modifiers-through-plane-init/20170725-062539
base:   git://people.freedesktop.org/~airlied/linux.git drm-next
reproduce: make htmldocs

All warnings (new ones prefixed by >>):

   WARNING: convert(1) not found, for SVG to PDF conversion install ImageMagick (https://www.imagemagick.org)
   arch/x86/include/asm/uaccess_32.h:1: warning: no structured comments found
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   include/linux/mod_devicetable.h:687: warning: Excess struct/union/enum/typedef member 'ver_major' description in 'fsl_mc_device_id'
   include/linux/mod_devicetable.h:687: warning: Excess struct/union/enum/typedef member 'ver_minor' description in 'fsl_mc_device_id'
   kernel/sched/core.c:2088: warning: No description found for parameter 'rf'
   kernel/sched/core.c:2088: warning: Excess function parameter 'cookie' description in 'try_to_wake_up_local'
   include/linux/kthread.h:26: warning: Excess function parameter '...' description in 'kthread_create'
   kernel/sys.c:1: warning: no structured comments found
   include/linux/device.h:969: warning: No description found for parameter 'dma_ops'
   drivers/dma-buf/seqno-fence.c:1: warning: no structured comments found
   include/linux/iio/iio.h:597: warning: No description found for parameter 'trig_readonly'
   include/linux/iio/trigger.h:151: warning: No description found for parameter 'indio_dev'
   include/linux/iio/trigger.h:151: warning: No description found for parameter 'trig'
   include/linux/device.h:970: warning: No description found for parameter 'dma_ops'
   include/linux/usb/gadget.h:230: warning: No description found for parameter 'claimed'
   include/linux/usb/gadget.h:230: warning: No description found for parameter 'enabled'
   include/linux/usb/gadget.h:408: warning: No description found for parameter 'quirk_altset_not_supp'
   include/linux/usb/gadget.h:408: warning: No description found for parameter 'quirk_stall_not_supp'
   include/linux/usb/gadget.h:408: warning: No description found for parameter 'quirk_zlp_not_supp'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'set_busid'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'debugfs_init'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_open_object'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_close_object'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'prime_handle_to_fd'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'prime_fd_to_handle'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_prime_export'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_prime_import'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_prime_pin'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_prime_unpin'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_prime_res_obj'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_prime_get_sg_table'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_prime_import_sg_table'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_prime_vmap'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_prime_vunmap'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_prime_mmap'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'gem_vm_ops'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'major'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'minor'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'patchlevel'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'name'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'desc'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'date'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'driver_features'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'ioctls'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'num_ioctls'
   include/drm/drm_drv.h:537: warning: No description found for parameter 'fops'
>> include/drm/drm_mode_config.h:771: warning: No description found for parameter 'modifiers_property'
>> include/drm/drm_mode_config.h:771: warning: Excess struct/union/enum/typedef member 'modifiers' description in 'drm_mode_config'
   include/drm/drm_plane.h:546: warning: No description found for parameter 'modifiers'
   include/drm/drm_plane.h:546: warning: No description found for parameter 'modifier_count'
   include/drm/drm_color_mgmt.h:1: warning: no structured comments found
   drivers/gpu/drm/drm_syncobj.c:341: warning: Excess function parameter 'dev' description in 'drm_syncobj_open'
   drivers/gpu/drm/drm_syncobj.c:366: warning: Excess function parameter 'dev' description in 'drm_syncobj_release'
   include/drm/drm_syncobj.h:1: warning: no structured comments found
   drivers/gpu/drm/drm_syncobj.c:342: warning: Excess function parameter 'dev' description in 'drm_syncobj_open'
   drivers/gpu/drm/drm_syncobj.c:367: warning: Excess function parameter 'dev' description in 'drm_syncobj_release'
   drivers/gpu/host1x/bus.c:50: warning: Excess function parameter 'driver' description in 'host1x_subdev_add'
   Documentation/core-api/assoc_array.rst:13: WARNING: Enumerated list ends without a blank line; unexpected unindent.
   Documentation/doc-guide/sphinx.rst:126: ERROR: Unknown target name: "sphinx c domain".
   kernel/sched/fair.c:7650: WARNING: Inline emphasis start-string without end-string.
   kernel/time/timer.c:1200: ERROR: Unexpected indentation.
   kernel/time/timer.c:1202: ERROR: Unexpected indentation.
   kernel/time/timer.c:1203: WARNING: Block quote ends without a blank line; unexpected unindent.
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   include/linux/iio/iio.h:219: ERROR: Unexpected indentation.
   include/linux/iio/iio.h:220: WARNING: Block quote ends without a blank line; unexpected unindent.
   include/linux/iio/iio.h:226: WARNING: Definition list ends without a blank line; unexpected unindent.
   drivers/iio/industrialio-core.c:638: ERROR: Unknown target name: "iio_val".
   drivers/iio/industrialio-core.c:645: ERROR: Unknown target name: "iio_val".
   drivers/message/fusion/mptbase.c:5051: WARNING: Definition list ends without a blank line; unexpected unindent.
   drivers/tty/serial/serial_core.c:1898: WARNING: Definition list ends without a blank line; unexpected unindent.
   drivers/pci/pci.c:3457: ERROR: Unexpected indentation.
   include/linux/regulator/driver.h:271: ERROR: Unknown target name: "regulator_regmap_x_voltage".
   include/linux/spi/spi.h:370: ERROR: Unexpected indentation.
   drivers/gpu/drm/drm_scdc_helper.c:203: ERROR: Unexpected indentation.
   drivers/gpu/drm/drm_scdc_helper.c:204: WARNING: Block quote ends without a blank line; unexpected unindent.
   drivers/gpu/drm/drm_ioctl.c:702: WARNING: Definition list ends without a blank line; unexpected unindent.
   Documentation/gpu/todo.rst:111: ERROR: Unknown target name: "drm_fb".
   sound/soc/soc-core.c:2671: ERROR: Unknown target name: "snd_soc_daifmt".
   sound/core/jack.c:312: ERROR: Unknown target name: "snd_jack_btn".
   Documentation/userspace-api/unshare.rst:108: WARNING: Inline emphasis start-string without end-string.
   Documentation/usb/typec.rst:: WARNING: document isn't included in any toctree
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   Fontconfig warning: "~/.fonts.conf", line 122: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "~/.fonts.conf", line 133: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "~/.fonts.conf", line 164: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "~/.fonts.conf", line 193: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 43: Having multiple values in <test> isn't supported and may not work as expected
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   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 69: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 82: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 96: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 109: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 122: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 133: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 164: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 193: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "~/.fonts.conf", line 43: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "~/.fonts.conf", line 56: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "~/.fonts.conf", line 69: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "~/.fonts.conf", line 82: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "~/.fonts.conf", line 96: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "~/.fonts.conf", line 109: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "~/.fonts.conf", line 122: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "~/.fonts.conf", line 133: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "~/.fonts.conf", line 164: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "~/.fonts.conf", line 193: Having multiple values in <test> isn't supported and may not work as expected
   Fontconfig warning: "/home/kbuild/.config/fontconfig/fonts.conf", line 43: Having multiple values in <test> isn't supported and may not work as expected

vim +/modifiers_property +771 include/drm/drm_mode_config.h

28575f16 Daniel Vetter 2016-11-14 @771  

:::::: The code at line 771 was first introduced by commit
:::::: 28575f165d36051310d7ea2350e2011f8095b6fb drm: Extract drm_mode_config.[hc]

:::::: TO: Daniel Vetter <daniel.vetter@ffwll.ch>
:::::: CC: Daniel Vetter <daniel.vetter@ffwll.ch>

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