From: Wayne Lin Wayne.Lin@amd.com
[ Upstream commit 410ad92d7fecd30de7456c19e326e272c2153ff2 ]
[Why & How] Due to some code flow constraints, we need to defer dc_lock needed works from dc_link_handle_hpd_rx_irq(). Thus, do following changes:
* Change allow_hpd_rx_irq() from static to public * Change handle_automated_test() from static to public * Extract link lost handling flow out from dc_link_handle_hpd_rx_irq() and put those into a new function dc_link_dp_handle_link_loss() * Add one option parameter to decide whether defer works within dc_link_handle_hpd_rx_irq()
Acked-by: Mikita Lipski mikita.lipski@amd.com Signed-off-by: Wayne Lin Wayne.Lin@amd.com Reviewed-by: Nicholas Kazlauskas nicholas.kazlauskas@amd.com Tested-by: Daniel Wheeler daniel.wheeler@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- .../gpu/drm/amd/display/dc/core/dc_link_dp.c | 92 ++++++++++++------- drivers/gpu/drm/amd/display/dc/dc_link.h | 3 + 2 files changed, 63 insertions(+), 32 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index 05f81d44aa6c..9b6111eb9ca4 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -2743,7 +2743,7 @@ void decide_link_settings(struct dc_stream_state *stream, }
/*************************Short Pulse IRQ***************************/ -static bool allow_hpd_rx_irq(const struct dc_link *link) +bool dc_link_dp_allow_hpd_rx_irq(const struct dc_link *link) { /* * Don't handle RX IRQ unless one of following is met: @@ -3177,7 +3177,7 @@ static void dp_test_get_audio_test_data(struct dc_link *link, bool disable_video } }
-static void handle_automated_test(struct dc_link *link) +void dc_link_dp_handle_automated_test(struct dc_link *link) { union test_request test_request; union test_response test_response; @@ -3226,17 +3226,50 @@ static void handle_automated_test(struct dc_link *link) sizeof(test_response)); }
-bool dc_link_handle_hpd_rx_irq(struct dc_link *link, union hpd_irq_data *out_hpd_irq_dpcd_data, bool *out_link_loss) +void dc_link_dp_handle_link_loss(struct dc_link *link) +{ + int i; + struct pipe_ctx *pipe_ctx; + + for (i = 0; i < MAX_PIPES; i++) { + pipe_ctx = &link->dc->current_state->res_ctx.pipe_ctx[i]; + if (pipe_ctx && pipe_ctx->stream && pipe_ctx->stream->link == link) + break; + } + + if (pipe_ctx == NULL || pipe_ctx->stream == NULL) + return; + + for (i = 0; i < MAX_PIPES; i++) { + pipe_ctx = &link->dc->current_state->res_ctx.pipe_ctx[i]; + if (pipe_ctx && pipe_ctx->stream && !pipe_ctx->stream->dpms_off && + pipe_ctx->stream->link == link && !pipe_ctx->prev_odm_pipe) { + core_link_disable_stream(pipe_ctx); + } + } + + for (i = 0; i < MAX_PIPES; i++) { + pipe_ctx = &link->dc->current_state->res_ctx.pipe_ctx[i]; + if (pipe_ctx && pipe_ctx->stream && !pipe_ctx->stream->dpms_off && + pipe_ctx->stream->link == link && !pipe_ctx->prev_odm_pipe) { + core_link_enable_stream(link->dc->current_state, pipe_ctx); + } + } +} + +static bool handle_hpd_rx_irq(struct dc_link *link, union hpd_irq_data *out_hpd_irq_dpcd_data, bool *out_link_loss, + bool defer_handling, bool *has_left_work) { union hpd_irq_data hpd_irq_dpcd_data = { { { {0} } } }; union device_service_irq device_service_clear = { { 0 } }; enum dc_status result; bool status = false; - struct pipe_ctx *pipe_ctx; - int i;
if (out_link_loss) *out_link_loss = false; + + if (has_left_work) + *has_left_work = false; /* For use cases related to down stream connection status change, * PSR and device auto test, refer to function handle_sst_hpd_irq * in DAL2.1*/ @@ -3268,11 +3301,14 @@ bool dc_link_handle_hpd_rx_irq(struct dc_link *link, union hpd_irq_data *out_hpd &device_service_clear.raw, sizeof(device_service_clear.raw)); device_service_clear.raw = 0; - handle_automated_test(link); + if (defer_handling && has_left_work) + *has_left_work = true; + else + dc_link_dp_handle_automated_test(link); return false; }
- if (!allow_hpd_rx_irq(link)) { + if (!dc_link_dp_allow_hpd_rx_irq(link)) { DC_LOG_HW_HPD_IRQ("%s: skipping HPD handling on %d\n", __func__, link->link_index); return false; @@ -3286,12 +3322,18 @@ bool dc_link_handle_hpd_rx_irq(struct dc_link *link, union hpd_irq_data *out_hpd * so do not handle as a normal sink status change interrupt. */
- if (hpd_irq_dpcd_data.bytes.device_service_irq.bits.UP_REQ_MSG_RDY) + if (hpd_irq_dpcd_data.bytes.device_service_irq.bits.UP_REQ_MSG_RDY) { + if (defer_handling && has_left_work) + *has_left_work = true; return true; + }
/* check if we have MST msg and return since we poll for it */ - if (hpd_irq_dpcd_data.bytes.device_service_irq.bits.DOWN_REP_MSG_RDY) + if (hpd_irq_dpcd_data.bytes.device_service_irq.bits.DOWN_REP_MSG_RDY) { + if (defer_handling && has_left_work) + *has_left_work = true; return false; + }
/* For now we only handle 'Downstream port status' case. * If we got sink count changed it means @@ -3308,29 +3350,10 @@ bool dc_link_handle_hpd_rx_irq(struct dc_link *link, union hpd_irq_data *out_hpd sizeof(hpd_irq_dpcd_data), "Status: ");
- for (i = 0; i < MAX_PIPES; i++) { - pipe_ctx = &link->dc->current_state->res_ctx.pipe_ctx[i]; - if (pipe_ctx && pipe_ctx->stream && pipe_ctx->stream->link == link) - break; - } - - if (pipe_ctx == NULL || pipe_ctx->stream == NULL) - return false; - - - for (i = 0; i < MAX_PIPES; i++) { - pipe_ctx = &link->dc->current_state->res_ctx.pipe_ctx[i]; - if (pipe_ctx && pipe_ctx->stream && !pipe_ctx->stream->dpms_off && - pipe_ctx->stream->link == link && !pipe_ctx->prev_odm_pipe) - core_link_disable_stream(pipe_ctx); - } - - for (i = 0; i < MAX_PIPES; i++) { - pipe_ctx = &link->dc->current_state->res_ctx.pipe_ctx[i]; - if (pipe_ctx && pipe_ctx->stream && !pipe_ctx->stream->dpms_off && - pipe_ctx->stream->link == link && !pipe_ctx->prev_odm_pipe) - core_link_enable_stream(link->dc->current_state, pipe_ctx); - } + if (defer_handling && has_left_work) + *has_left_work = true; + else + dc_link_dp_handle_link_loss(link);
status = false; if (out_link_loss) @@ -3356,6 +3379,11 @@ bool dc_link_handle_hpd_rx_irq(struct dc_link *link, union hpd_irq_data *out_hpd return status; }
+bool dc_link_handle_hpd_rx_irq(struct dc_link *link, union hpd_irq_data *out_hpd_irq_dpcd_data, bool *out_link_loss) +{ + return handle_hpd_rx_irq(link, out_hpd_irq_dpcd_data, out_link_loss, false, NULL); +} + /*query dpcd for version and mst cap addresses*/ bool is_mst_supported(struct dc_link *link) { diff --git a/drivers/gpu/drm/amd/display/dc/dc_link.h b/drivers/gpu/drm/amd/display/dc/dc_link.h index 83845d006c54..0efa2bc8639b 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_link.h +++ b/drivers/gpu/drm/amd/display/dc/dc_link.h @@ -308,6 +308,9 @@ bool dc_link_wait_for_t12(struct dc_link *link); enum dc_status read_hpd_rx_irq_data( struct dc_link *link, union hpd_irq_data *irq_data); +void dc_link_dp_handle_automated_test(struct dc_link *link); +void dc_link_dp_handle_link_loss(struct dc_link *link); +bool dc_link_dp_allow_hpd_rx_irq(const struct dc_link *link);
struct dc_sink_init_data;