diff options
6 files changed, 81 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c index 085c1a39b313..82fc3d5b3b2a 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c @@ -1625,12 +1625,79 @@ void dcn10_pipe_control_lock( hws->funcs.verify_allow_pstate_change_high(dc); } +/** + * delay_cursor_until_vupdate() - Delay cursor update if too close to VUPDATE. + * + * Software keepout workaround to prevent cursor update locking from stalling + * out cursor updates indefinitely or from old values from being retained in + * the case where the viewport changes in the same frame as the cursor. + * + * The idea is to calculate the remaining time from VPOS to VUPDATE. If it's + * too close to VUPDATE, then stall out until VUPDATE finishes. + * + * TODO: Optimize cursor programming to be once per frame before VUPDATE + * to avoid the need for this workaround. + */ +static void delay_cursor_until_vupdate(struct dc *dc, struct pipe_ctx *pipe_ctx) +{ + struct dc_stream_state *stream = pipe_ctx->stream; + struct crtc_position position; + uint32_t vupdate_start, vupdate_end; + unsigned int lines_to_vupdate, us_to_vupdate, vpos; + unsigned int us_per_line, us_vupdate; + + if (!dc->hwss.calc_vupdate_position || !dc->hwss.get_position) + return; + + if (!pipe_ctx->stream_res.stream_enc || !pipe_ctx->stream_res.tg) + return; + + dc->hwss.calc_vupdate_position(dc, pipe_ctx, &vupdate_start, + &vupdate_end); + + dc->hwss.get_position(&pipe_ctx, 1, &position); + vpos = position.vertical_count; + + /* Avoid wraparound calculation issues */ + vupdate_start += stream->timing.v_total; + vupdate_end += stream->timing.v_total; + vpos += stream->timing.v_total; + + if (vpos <= vupdate_start) { + /* VPOS is in VACTIVE or back porch. */ + lines_to_vupdate = vupdate_start - vpos; + } else if (vpos > vupdate_end) { + /* VPOS is in the front porch. */ + return; + } else { + /* VPOS is in VUPDATE. */ + lines_to_vupdate = 0; + } + + /* Calculate time until VUPDATE in microseconds. */ + us_per_line = + stream->timing.h_total * 10000u / stream->timing.pix_clk_100hz; + us_to_vupdate = lines_to_vupdate * us_per_line; + + /* 70 us is a conservative estimate of cursor update time*/ + if (us_to_vupdate > 70) + return; + + /* Stall out until the cursor update completes. */ + us_vupdate = (vupdate_end - vupdate_start + 1) * us_per_line; + udelay(us_to_vupdate + us_vupdate); +} + void dcn10_cursor_lock(struct dc *dc, struct pipe_ctx *pipe, bool lock) { /* cursor lock is per MPCC tree, so only need to lock one pipe per stream */ if (!pipe || pipe->top_pipe) return; + /* Prevent cursor lock from stalling out cursor updates. */ + if (lock) + delay_cursor_until_vupdate(dc, pipe); + dc->res_pool->mpc->funcs->cursor_lock(dc->res_pool->mpc, pipe->stream_res.opp->inst, lock); } @@ -3236,7 +3303,7 @@ int dcn10_get_vupdate_offset_from_vsync(struct pipe_ctx *pipe_ctx) return vertical_line_start; } -static void dcn10_calc_vupdate_position( +void dcn10_calc_vupdate_position( struct dc *dc, struct pipe_ctx *pipe_ctx, uint32_t *start_line, diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.h b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.h index af51424315d5..42b6e016d71e 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.h +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.h @@ -34,6 +34,11 @@ struct dc; void dcn10_hw_sequencer_construct(struct dc *dc); int dcn10_get_vupdate_offset_from_vsync(struct pipe_ctx *pipe_ctx); +void dcn10_calc_vupdate_position( + struct dc *dc, + struct pipe_ctx *pipe_ctx, + uint32_t *start_line, + uint32_t *end_line); void dcn10_setup_vupdate_interrupt(struct dc *dc, struct pipe_ctx *pipe_ctx); enum dc_status dcn10_enable_stream_timing( struct pipe_ctx *pipe_ctx, diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_init.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_init.c index 700509bdf503..9e8e32629e47 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_init.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_init.c @@ -72,6 +72,7 @@ static const struct hw_sequencer_funcs dcn10_funcs = { .set_clock = dcn10_set_clock, .get_clock = dcn10_get_clock, .get_vupdate_offset_from_vsync = dcn10_get_vupdate_offset_from_vsync, + .calc_vupdate_position = dcn10_calc_vupdate_position, }; static const struct hwseq_private_funcs dcn10_private_funcs = { diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_init.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_init.c index 6a21228893ee..8334bbd6eabb 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_init.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_init.c @@ -83,6 +83,7 @@ static const struct hw_sequencer_funcs dcn20_funcs = { .init_vm_ctx = dcn20_init_vm_ctx, .set_flip_control_gsl = dcn20_set_flip_control_gsl, .get_vupdate_offset_from_vsync = dcn10_get_vupdate_offset_from_vsync, + .calc_vupdate_position = dcn10_calc_vupdate_position, }; static const struct hwseq_private_funcs dcn20_private_funcs = { diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_init.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_init.c index 707ce0f28fab..4dd634118df2 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_init.c +++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_init.c @@ -86,6 +86,7 @@ static const struct hw_sequencer_funcs dcn21_funcs = { .optimize_pwr_state = dcn21_optimize_pwr_state, .exit_optimized_pwr_state = dcn21_exit_optimized_pwr_state, .get_vupdate_offset_from_vsync = dcn10_get_vupdate_offset_from_vsync, + .calc_vupdate_position = dcn10_calc_vupdate_position, .set_cursor_position = dcn10_set_cursor_position, .set_cursor_attribute = dcn10_set_cursor_attribute, .set_cursor_sdr_white_level = dcn10_set_cursor_sdr_white_level, diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h b/drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h index e57467d99d66..08307f3796e3 100644 --- a/drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h +++ b/drivers/gpu/drm/amd/display/dc/inc/hw_sequencer.h @@ -92,6 +92,11 @@ struct hw_sequencer_funcs { void (*get_position)(struct pipe_ctx **pipe_ctx, int num_pipes, struct crtc_position *position); int (*get_vupdate_offset_from_vsync)(struct pipe_ctx *pipe_ctx); + void (*calc_vupdate_position)( + struct dc *dc, + struct pipe_ctx *pipe_ctx, + uint32_t *start_line, + uint32_t *end_line); void (*enable_per_frame_crtc_position_reset)(struct dc *dc, int group_size, struct pipe_ctx *grouped_pipes[]); void (*enable_timing_synchronization)(struct dc *dc, |