diff options
| author | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2024-12-02 12:06:32 +0200 |
|---|---|---|
| committer | Abhinav Kumar <quic_abhinavk@quicinc.com> | 2024-12-02 18:41:42 -0800 |
| commit | b047cbe5e54b632042941b90b808223e63742690 (patch) | |
| tree | 98e86a0d4059bde7812c534a9c0a4d69f0a09ca4 | |
| parent | 7dee35d79bb046bfd425aa9e58a82414f67c1cec (diff) | |
drm/msm/dp: fix msm_dp_utils_pack_sdp_header interface
The msm_dp_utils_pack_sdp_header() accepts an unlimited-size u32 pointer
for the header output, while it expects a two-element array. It performs
a sizeof check which is always true on 64-bit platforms (since
sizeof(u32*) is 8) and is always false on 32-bit platforms. It returns
an error code which nobody actually checks.
Fix the function interface to accept u32[2] and return void, skipping
all the checks.
Fixes: 55fb8ffc1802 ("drm/msm/dp: add VSC SDP support for YUV420 over DP")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/626806/
Link: https://lore.kernel.org/r/20241202-fd-dp-audio-fixup-v2-2-d9187ea96dad@linaro.org
[quic_abhinavk@quicinc.com: minor fix in the commit message]
Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_utils.c | 10 | ||||
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_utils.h | 2 |
2 files changed, 2 insertions, 10 deletions
diff --git a/drivers/gpu/drm/msm/dp/dp_utils.c b/drivers/gpu/drm/msm/dp/dp_utils.c index 2a40f07fe2d5..4a5ebb0c33b8 100644 --- a/drivers/gpu/drm/msm/dp/dp_utils.c +++ b/drivers/gpu/drm/msm/dp/dp_utils.c @@ -74,14 +74,8 @@ u8 msm_dp_utils_calculate_parity(u32 data) return parity_byte; } -ssize_t msm_dp_utils_pack_sdp_header(struct dp_sdp_header *sdp_header, u32 *header_buff) +void msm_dp_utils_pack_sdp_header(struct dp_sdp_header *sdp_header, u32 header_buff[2]) { - size_t length; - - length = sizeof(header_buff); - if (length < DP_SDP_HEADER_SIZE) - return -ENOSPC; - header_buff[0] = FIELD_PREP(HEADER_0_MASK, sdp_header->HB0) | FIELD_PREP(PARITY_0_MASK, msm_dp_utils_calculate_parity(sdp_header->HB0)) | FIELD_PREP(HEADER_1_MASK, sdp_header->HB1) | @@ -91,6 +85,4 @@ ssize_t msm_dp_utils_pack_sdp_header(struct dp_sdp_header *sdp_header, u32 *head FIELD_PREP(PARITY_2_MASK, msm_dp_utils_calculate_parity(sdp_header->HB2)) | FIELD_PREP(HEADER_3_MASK, sdp_header->HB3) | FIELD_PREP(PARITY_3_MASK, msm_dp_utils_calculate_parity(sdp_header->HB3)); - - return length; } diff --git a/drivers/gpu/drm/msm/dp/dp_utils.h b/drivers/gpu/drm/msm/dp/dp_utils.h index 88d53157f5b5..2e4f98a863c4 100644 --- a/drivers/gpu/drm/msm/dp/dp_utils.h +++ b/drivers/gpu/drm/msm/dp/dp_utils.h @@ -31,6 +31,6 @@ u8 msm_dp_utils_get_g0_value(u8 data); u8 msm_dp_utils_get_g1_value(u8 data); u8 msm_dp_utils_calculate_parity(u32 data); -ssize_t msm_dp_utils_pack_sdp_header(struct dp_sdp_header *sdp_header, u32 *header_buff); +void msm_dp_utils_pack_sdp_header(struct dp_sdp_header *sdp_header, u32 header_buff[2]); #endif /* _DP_UTILS_H_ */ |