drm/amdgpu: Fix kernel-doc for the RAS sysfs interface

Imporve the kernel-doc for the RAS sysfs
interface. Fix the grammar, fix the context.

Cc: Alexander Deucher <Alexander.Deucher@amd.com>
Cc: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c

@@ -274,7 +274,7 @@ static int amdgpu_ras_debugfs_ctrl_parse_data(struct file *f,
 /**
  * DOC: AMDGPU RAS debugfs control interface
  *
- * It accepts struct ras_debug_if who has two members.
+ * The control interface accepts struct ras_debug_if which has two members.
  *
  * First member: ras_debug_if::head or ras_debug_if::inject.
  *
@@ -299,32 +299,33 @@ static int amdgpu_ras_debugfs_ctrl_parse_data(struct file *f,
  *
  * How to use the interface?
  *
- * Programs
+ * In a program
  *
- * Copy the struct ras_debug_if in your codes and initialize it.
- * Write the struct to the control node.
+ * Copy the struct ras_debug_if in your code and initialize it.
+ * Write the struct to the control interface.
  *
- * Shells
+ * From shell
  *
  * .. code-block:: bash
  *
- *	echo op block [error [sub_block address value]] > .../ras/ras_ctrl
+ *	echo "disable <block>" > /sys/kernel/debug/dri/<N>/ras/ras_ctrl
+ *	echo "enable  <block> <error>" > /sys/kernel/debug/dri/<N>/ras/ras_ctrl
+ *	echo "inject  <block> <error> <sub-block> <address> <value> > /sys/kernel/debug/dri/<N>/ras/ras_ctrl
  *
- * Parameters:
+ * Where N, is the card which you want to affect.
  *
- * op: disable, enable, inject
- *	disable: only block is needed
- *	enable: block and error are needed
- *	inject: error, address, value are needed
- * block: umc, sdma, gfx, .........
+ * "disable" requires only the block.
+ * "enable" requires the block and error type.
+ * "inject" requires the block, error type, address, and value.
+ * The block is one of: umc, sdma, gfx, etc.
  *	see ras_block_string[] for details
- * error: ue, ce
- *	ue: multi_uncorrectable
- *	ce: single_correctable
- * sub_block:
- *	sub block index, pass 0 if there is no sub block
+ * The error type is one of: ue, ce, where,
+ *	ue is multi-uncorrectable
+ *	ce is single-correctable
+ * The sub-block is a the sub-block index, pass 0 if there is no sub-block.
+ * The address and value are hexadecimal numbers, leading 0x is optional.
  *
- * here are some examples for bash commands:
+ * For instance,
  *
  * .. code-block:: bash
  *
@@ -332,17 +333,17 @@ static int amdgpu_ras_debugfs_ctrl_parse_data(struct file *f,
  *	echo inject umc ce 0 0 0 > /sys/kernel/debug/dri/0/ras/ras_ctrl
  *	echo disable umc > /sys/kernel/debug/dri/0/ras/ras_ctrl
  *
- * How to check the result?
+ * How to check the result of the operation?
  *
- * For disable/enable, please check ras features at
+ * To check disable/enable, see "ras" features at,
  * /sys/class/drm/card[0/1/2...]/device/ras/features
  *
- * For inject, please check corresponding err count at
- * /sys/class/drm/card[0/1/2...]/device/ras/[gfx/sdma/...]_err_count
+ * To check inject, see the corresponding error count at,
+ * /sys/class/drm/card[0/1/2...]/device/ras/[gfx|sdma|umc|...]_err_count
  *
  * .. note::
  *	Operations are only allowed on blocks which are supported.
- *	Please check ras mask at /sys/module/amdgpu/parameters/ras_mask
+ *	Check the "ras" mask at /sys/module/amdgpu/parameters/ras_mask
  *	to see which blocks support RAS on a particular asic.
  *
  */