This reverts commit b1f0ab445ec609f9b58e0969c5d052b52d9a54e7. This patch is not valid. The driver needs to actually read the entries in the ring buffer. Add a comment to make this clear.
Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1916 Cc: Maíra Canal <maira.ca...@usp.br> Signed-off-by: Alex Deucher <alexander.deuc...@amd.com> --- drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h b/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h index d3088836d4e4..cb92ab4c8b98 100644 --- a/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h +++ b/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h @@ -2918,8 +2918,15 @@ static inline void dmub_rb_flush_pending(const struct dmub_rb *rb) while (rptr != wptr) { uint64_t volatile *data = (uint64_t volatile *)((uint8_t *)(rb->base_address) + rptr); //uint64_t volatile *p = (uint64_t volatile *)data; + uint64_t temp; + uint8_t i; - *data += DMUB_RB_CMD_SIZE / sizeof(uint64_t); + /* Don't remove this. + * The contents need to actually be read from the ring buffer + * for this function to be effective. + */ + for (i = 0; i < DMUB_RB_CMD_SIZE / sizeof(uint64_t); i++) + temp = *data++; rptr += DMUB_RB_CMD_SIZE; if (rptr >= rb->capacity) -- 2.35.1
