diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2013-08-07 19:34:53 -0400 |
|---|---|---|
| committer | Luis Henriques <luis.henriques@canonical.com> | 2013-09-30 12:00:09 +0100 |
| commit | 53bf26bf97c106c7c5c62242ddcb960c8b02cb75 (patch) | |
| tree | 6bc85cc949d2b8aa8624cd9b81459ce6d1c44905 | |
| parent | dd68ba2633afcc1ccb0d773a6c1539ff00c891f5 (diff) | |
drm/radeon: fix endian bugs in hw i2c atom routines
commit 4543eda52113d1e2cc0e9bf416f79597e6ef1ec7 upstream.
Need to swap the data fetched over i2c properly. This
is the same fix as the endian fix for aux channel
transactions.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
| -rw-r--r-- | drivers/gpu/drm/radeon/atombios_dp.c | 6 | ||||
| -rw-r--r-- | drivers/gpu/drm/radeon/atombios_i2c.c | 4 |
2 files changed, 6 insertions, 4 deletions
diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c index 824d03c4a925..a6723790de2c 100644 --- a/drivers/gpu/drm/radeon/atombios_dp.c +++ b/drivers/gpu/drm/radeon/atombios_dp.c @@ -51,7 +51,7 @@ static char *pre_emph_names[] = { * or from atom. Note that atom operates on * dw units. */ -static void radeon_copy_swap(u8 *dst, u8 *src, u8 num_bytes, bool to_le) +void radeon_atom_copy_swap(u8 *dst, u8 *src, u8 num_bytes, bool to_le) { #ifdef __BIG_ENDIAN u8 src_tmp[20], dst_tmp[20]; /* used for byteswapping */ @@ -101,7 +101,7 @@ static int radeon_process_aux_ch(struct radeon_i2c_chan *chan, base = (unsigned char *)(rdev->mode_info.atom_context->scratch + 1); - radeon_copy_swap(base, send, send_bytes, true); + radeon_atom_copy_swap(base, send, send_bytes, true); args.v1.lpAuxRequest = cpu_to_le16((u16)(0 + 4)); args.v1.lpDataOut = cpu_to_le16((u16)(16 + 4)); @@ -138,7 +138,7 @@ static int radeon_process_aux_ch(struct radeon_i2c_chan *chan, recv_bytes = recv_size; if (recv && recv_size) - radeon_copy_swap(recv, base + 16, recv_bytes, false); + radeon_atom_copy_swap(recv, base + 16, recv_bytes, false); return recv_bytes; } diff --git a/drivers/gpu/drm/radeon/atombios_i2c.c b/drivers/gpu/drm/radeon/atombios_i2c.c index 44d87b6b4220..9ed94a84d728 100644 --- a/drivers/gpu/drm/radeon/atombios_i2c.c +++ b/drivers/gpu/drm/radeon/atombios_i2c.c @@ -27,6 +27,8 @@ #include "radeon.h" #include "atom.h" +extern void radeon_atom_copy_swap(u8 *dst, u8 *src, u8 num_bytes, bool to_le); + #define TARGET_HW_I2C_CLOCK 50 /* these are a limitation of ProcessI2cChannelTransaction not the hw */ @@ -77,7 +79,7 @@ static int radeon_process_i2c_ch(struct radeon_i2c_chan *chan, } if (!(flags & HW_I2C_WRITE)) - memcpy(buf, base, num); + radeon_atom_copy_swap(buf, base, num, false); return 0; } |