aboutsummaryrefslogtreecommitdiff
path: root/include
diff options
context:
space:
mode:
Diffstat (limited to 'include')
-rw-r--r--include/drm/dp/drm_dp_helper.h24
-rw-r--r--include/linux/iosys-map.h218
2 files changed, 229 insertions, 13 deletions
diff --git a/include/drm/dp/drm_dp_helper.h b/include/drm/dp/drm_dp_helper.h
index 98d020835b49..69487bd8ed56 100644
--- a/include/drm/dp/drm_dp_helper.h
+++ b/include/drm/dp/drm_dp_helper.h
@@ -560,6 +560,7 @@ struct drm_panel;
# define DP_TRAINING_PATTERN_DISABLE 0
# define DP_TRAINING_PATTERN_1 1
# define DP_TRAINING_PATTERN_2 2
+# define DP_TRAINING_PATTERN_2_CDS 3 /* 2.0 E11 */
# define DP_TRAINING_PATTERN_3 3 /* 1.2 */
# define DP_TRAINING_PATTERN_4 7 /* 1.4 */
# define DP_TRAINING_PATTERN_MASK 0x3
@@ -738,11 +739,13 @@ struct drm_panel;
DP_LANE_CHANNEL_EQ_DONE | \
DP_LANE_SYMBOL_LOCKED)
-#define DP_LANE_ALIGN_STATUS_UPDATED 0x204
-
-#define DP_INTERLANE_ALIGN_DONE (1 << 0)
-#define DP_DOWNSTREAM_PORT_STATUS_CHANGED (1 << 6)
-#define DP_LINK_STATUS_UPDATED (1 << 7)
+#define DP_LANE_ALIGN_STATUS_UPDATED 0x204
+#define DP_INTERLANE_ALIGN_DONE (1 << 0)
+#define DP_128B132B_DPRX_EQ_INTERLANE_ALIGN_DONE (1 << 2) /* 2.0 E11 */
+#define DP_128B132B_DPRX_CDS_INTERLANE_ALIGN_DONE (1 << 3) /* 2.0 E11 */
+#define DP_128B132B_LT_FAILED (1 << 4) /* 2.0 E11 */
+#define DP_DOWNSTREAM_PORT_STATUS_CHANGED (1 << 6)
+#define DP_LINK_STATUS_UPDATED (1 << 7)
#define DP_SINK_STATUS 0x205
# define DP_RECEIVE_PORT_0_STATUS (1 << 0)
@@ -1112,6 +1115,7 @@ struct drm_panel;
# define DP_UHBR13_5 (1 << 2)
#define DP_128B132B_TRAINING_AUX_RD_INTERVAL 0x2216 /* 2.0 */
+# define DP_128B132B_TRAINING_AUX_RD_INTERVAL_1MS_UNIT (1 << 7)
# define DP_128B132B_TRAINING_AUX_RD_INTERVAL_MASK 0x7f
# define DP_128B132B_TRAINING_AUX_RD_INTERVAL_400_US 0x00
# define DP_128B132B_TRAINING_AUX_RD_INTERVAL_4_MS 0x01
@@ -1347,6 +1351,7 @@ struct drm_panel;
# define DP_PHY_REPEATER_128B132B_SUPPORTED (1 << 0)
/* See DP_128B132B_SUPPORTED_LINK_RATES for values */
#define DP_PHY_REPEATER_128B132B_RATES 0xf0007 /* 2.0 */
+#define DP_PHY_REPEATER_EQ_DONE 0xf0008 /* 2.0 E11 */
enum drm_dp_phy {
DP_PHY_DPRX,
@@ -1549,6 +1554,15 @@ void drm_dp_link_train_channel_eq_delay(const struct drm_dp_aux *aux,
void drm_dp_lttpr_link_train_channel_eq_delay(const struct drm_dp_aux *aux,
const u8 caps[DP_LTTPR_PHY_CAP_SIZE]);
+int drm_dp_128b132b_read_aux_rd_interval(struct drm_dp_aux *aux);
+bool drm_dp_128b132b_lane_channel_eq_done(const u8 link_status[DP_LINK_STATUS_SIZE],
+ int lane_count);
+bool drm_dp_128b132b_lane_symbol_locked(const u8 link_status[DP_LINK_STATUS_SIZE],
+ int lane_count);
+bool drm_dp_128b132b_eq_interlane_align_done(const u8 link_status[DP_LINK_STATUS_SIZE]);
+bool drm_dp_128b132b_cds_interlane_align_done(const u8 link_status[DP_LINK_STATUS_SIZE]);
+bool drm_dp_128b132b_link_training_failed(const u8 link_status[DP_LINK_STATUS_SIZE]);
+
u8 drm_dp_link_rate_to_bw_code(int link_rate);
int drm_dp_bw_code_to_link_rate(u8 link_bw);
diff --git a/include/linux/iosys-map.h b/include/linux/iosys-map.h
index f4186f91caa6..e69a002d5aa4 100644
--- a/include/linux/iosys-map.h
+++ b/include/linux/iosys-map.h
@@ -121,6 +121,45 @@ struct iosys_map {
}
/**
+ * IOSYS_MAP_INIT_OFFSET - Initializes struct iosys_map from another iosys_map
+ * @map_: The dma-buf mapping structure to copy from
+ * @offset_: Offset to add to the other mapping
+ *
+ * Initializes a new iosys_map struct based on another passed as argument. It
+ * does a shallow copy of the struct so it's possible to update the back storage
+ * without changing where the original map points to. It is the equivalent of
+ * doing:
+ *
+ * .. code-block:: c
+ *
+ * iosys_map map = other_map;
+ * iosys_map_incr(&map, &offset);
+ *
+ * Example usage:
+ *
+ * .. code-block:: c
+ *
+ * void foo(struct device *dev, struct iosys_map *base_map)
+ * {
+ * ...
+ * struct iosys_map map = IOSYS_MAP_INIT_OFFSET(base_map, FIELD_OFFSET);
+ * ...
+ * }
+ *
+ * The advantage of using the initializer over just increasing the offset with
+ * iosys_map_incr() like above is that the new map will always point to the
+ * right place of the buffer during its scope. It reduces the risk of updating
+ * the wrong part of the buffer and having no compiler warning about that. If
+ * the assignment to IOSYS_MAP_INIT_OFFSET() is forgotten, the compiler can warn
+ * about the use of uninitialized variable.
+ */
+#define IOSYS_MAP_INIT_OFFSET(map_, offset_) ({ \
+ struct iosys_map copy = *map_; \
+ iosys_map_incr(&copy, offset_); \
+ copy; \
+})
+
+/**
* iosys_map_set_vaddr - Sets a iosys mapping structure to an address in system memory
* @map: The iosys_map structure
* @vaddr: A system-memory address
@@ -220,22 +259,43 @@ static inline void iosys_map_clear(struct iosys_map *map)
}
/**
- * iosys_map_memcpy_to - Memcpy into iosys mapping
+ * iosys_map_memcpy_to - Memcpy into offset of iosys_map
* @dst: The iosys_map structure
+ * @dst_offset: The offset from which to copy
* @src: The source buffer
* @len: The number of byte in src
*
- * Copies data into a iosys mapping. The source buffer is in system
- * memory. Depending on the buffer's location, the helper picks the correct
- * method of accessing the memory.
+ * Copies data into a iosys_map with an offset. The source buffer is in
+ * system memory. Depending on the buffer's location, the helper picks the
+ * correct method of accessing the memory.
*/
-static inline void iosys_map_memcpy_to(struct iosys_map *dst, const void *src,
- size_t len)
+static inline void iosys_map_memcpy_to(struct iosys_map *dst, size_t dst_offset,
+ const void *src, size_t len)
{
if (dst->is_iomem)
- memcpy_toio(dst->vaddr_iomem, src, len);
+ memcpy_toio(dst->vaddr_iomem + dst_offset, src, len);
+ else
+ memcpy(dst->vaddr + dst_offset, src, len);
+}
+
+/**
+ * iosys_map_memcpy_from - Memcpy from iosys_map into system memory
+ * @dst: Destination in system memory
+ * @src: The iosys_map structure
+ * @src_offset: The offset from which to copy
+ * @len: The number of byte in src
+ *
+ * Copies data from a iosys_map with an offset. The dest buffer is in
+ * system memory. Depending on the mapping location, the helper picks the
+ * correct method of accessing the memory.
+ */
+static inline void iosys_map_memcpy_from(void *dst, const struct iosys_map *src,
+ size_t src_offset, size_t len)
+{
+ if (src->is_iomem)
+ memcpy_fromio(dst, src->vaddr_iomem + src_offset, len);
else
- memcpy(dst->vaddr, src, len);
+ memcpy(dst, src->vaddr + src_offset, len);
}
/**
@@ -254,4 +314,146 @@ static inline void iosys_map_incr(struct iosys_map *map, size_t incr)
map->vaddr += incr;
}
+/**
+ * iosys_map_memset - Memset iosys_map
+ * @dst: The iosys_map structure
+ * @offset: Offset from dst where to start setting value
+ * @value: The value to set
+ * @len: The number of bytes to set in dst
+ *
+ * Set value in iosys_map. Depending on the buffer's location, the helper
+ * picks the correct method of accessing the memory.
+ */
+static inline void iosys_map_memset(struct iosys_map *dst, size_t offset,
+ int value, size_t len)
+{
+ if (dst->is_iomem)
+ memset_io(dst->vaddr_iomem + offset, value, len);
+ else
+ memset(dst->vaddr + offset, value, len);
+}
+
+/**
+ * iosys_map_rd - Read a C-type value from the iosys_map
+ *
+ * @map__: The iosys_map structure
+ * @offset__: The offset from which to read
+ * @type__: Type of the value being read
+ *
+ * Read a C type value from iosys_map, handling possible un-aligned accesses to
+ * the mapping.
+ *
+ * Returns:
+ * The value read from the mapping.
+ */
+#define iosys_map_rd(map__, offset__, type__) ({ \
+ type__ val; \
+ iosys_map_memcpy_from(&val, map__, offset__, sizeof(val)); \
+ val; \
+})
+
+/**
+ * iosys_map_wr - Write a C-type value to the iosys_map
+ *
+ * @map__: The iosys_map structure
+ * @offset__: The offset from the mapping to write to
+ * @type__: Type of the value being written
+ * @val__: Value to write
+ *
+ * Write a C-type value to the iosys_map, handling possible un-aligned accesses
+ * to the mapping.
+ */
+#define iosys_map_wr(map__, offset__, type__, val__) ({ \
+ type__ val = (val__); \
+ iosys_map_memcpy_to(map__, offset__, &val, sizeof(val)); \
+})
+
+/**
+ * iosys_map_rd_field - Read a member from a struct in the iosys_map
+ *
+ * @map__: The iosys_map structure
+ * @struct_offset__: Offset from the beggining of the map, where the struct
+ * is located
+ * @struct_type__: The struct describing the layout of the mapping
+ * @field__: Member of the struct to read
+ *
+ * Read a value from iosys_map considering its layout is described by a C struct
+ * starting at @struct_offset__. The field offset and size is calculated and its
+ * value read handling possible un-aligned memory accesses. For example: suppose
+ * there is a @struct foo defined as below and the value ``foo.field2.inner2``
+ * needs to be read from the iosys_map:
+ *
+ * .. code-block:: c
+ *
+ * struct foo {
+ * int field1;
+ * struct {
+ * int inner1;
+ * int inner2;
+ * } field2;
+ * int field3;
+ * } __packed;
+ *
+ * This is the expected memory layout of a buffer using iosys_map_rd_field():
+ *
+ * +------------------------------+--------------------------+
+ * | Address | Content |
+ * +==============================+==========================+
+ * | buffer + 0000 | start of mmapped buffer |
+ * | | pointed by iosys_map |
+ * +------------------------------+--------------------------+
+ * | ... | ... |
+ * +------------------------------+--------------------------+
+ * | buffer + ``struct_offset__`` | start of ``struct foo`` |
+ * +------------------------------+--------------------------+
+ * | ... | ... |
+ * +------------------------------+--------------------------+
+ * | buffer + wwww | ``foo.field2.inner2`` |
+ * +------------------------------+--------------------------+
+ * | ... | ... |
+ * +------------------------------+--------------------------+
+ * | buffer + yyyy | end of ``struct foo`` |
+ * +------------------------------+--------------------------+
+ * | ... | ... |
+ * +------------------------------+--------------------------+
+ * | buffer + zzzz | end of mmaped buffer |
+ * +------------------------------+--------------------------+
+ *
+ * Values automatically calculated by this macro or not needed are denoted by
+ * wwww, yyyy and zzzz. This is the code to read that value:
+ *
+ * .. code-block:: c
+ *
+ * x = iosys_map_rd_field(&map, offset, struct foo, field2.inner2);
+ *
+ * Returns:
+ * The value read from the mapping.
+ */
+#define iosys_map_rd_field(map__, struct_offset__, struct_type__, field__) ({ \
+ struct_type__ *s; \
+ iosys_map_rd(map__, struct_offset__ + offsetof(struct_type__, field__), \
+ typeof(s->field__)); \
+})
+
+/**
+ * iosys_map_wr_field - Write to a member of a struct in the iosys_map
+ *
+ * @map__: The iosys_map structure
+ * @struct_offset__: Offset from the beggining of the map, where the struct
+ * is located
+ * @struct_type__: The struct describing the layout of the mapping
+ * @field__: Member of the struct to read
+ * @val__: Value to write
+ *
+ * Write a value to the iosys_map considering its layout is described by a C struct
+ * starting at @struct_offset__. The field offset and size is calculated and the
+ * @val__ is written handling possible un-aligned memory accesses. Refer to
+ * iosys_map_rd_field() for expected usage and memory layout.
+ */
+#define iosys_map_wr_field(map__, struct_offset__, struct_type__, field__, val__) ({ \
+ struct_type__ *s; \
+ iosys_map_wr(map__, struct_offset__ + offsetof(struct_type__, field__), \
+ typeof(s->field__), val__); \
+})
+
#endif /* __IOSYS_MAP_H__ */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 06:36:42 +0000