6.12-stable review patch. If anyone has any objections, please let me know.
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From: Ausef Yousof Ausef.Yousof@amd.com
[ Upstream commit 24909d9ec7c3afa8da2f3c9afa312e7a4a61f250 ]
[WHY] Right now in dml2 mode validation we are calculating UBF parameters for prefetch calculation for single and dual DPP scenarios. Data structure to store such values are just 1D arrays, the single DPP values are overwritten by the dualDPP values, and we end up using dualDPP for prefetch calculations twice (once in place of singleDPP support check and again for dual).
This naturally leads to many problems, one of which validating a mode in "singleDPP" (when we used dual DPP parameters) and sending the singleDPP parameters to mode programming, if we cannot support then we observe the corruption as described in the ticket.
[HOW] UBF values need to have 2d arrays to store values specific to single and dual DPP states to avoid single DPP values being overwritten. Other parameters are recorded on a per state basis such as prefetch UBF values but they are in the same loop used for calculation and at that point its fine to overwrite them, its not the case for plain UBF values.
Reviewed-by: Nicholas Kazlauskas nicholas.kazlauskas@amd.com Signed-off-by: Ausef Yousof Ausef.Yousof@amd.com Signed-off-by: Aurabindo Pillai aurabindo.pillai@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 --- .../amd/display/dc/dml2/display_mode_core.c | 30 +++++++++---------- .../dc/dml2/display_mode_core_structs.h | 6 ++-- 2 files changed, 18 insertions(+), 18 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c b/drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c index be87dc0f07799..6822b07951204 100644 --- a/drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c +++ b/drivers/gpu/drm/amd/display/dc/dml2/display_mode_core.c @@ -6301,9 +6301,9 @@ static void dml_prefetch_check(struct display_mode_lib_st *mode_lib) mode_lib->ms.meta_row_bandwidth_this_state, mode_lib->ms.dpte_row_bandwidth_this_state, mode_lib->ms.NoOfDPPThisState, - mode_lib->ms.UrgentBurstFactorLuma, - mode_lib->ms.UrgentBurstFactorChroma, - mode_lib->ms.UrgentBurstFactorCursor); + mode_lib->ms.UrgentBurstFactorLuma[j], + mode_lib->ms.UrgentBurstFactorChroma[j], + mode_lib->ms.UrgentBurstFactorCursor[j]);
s->VMDataOnlyReturnBWPerState = dml_get_return_bw_mbps_vm_only( &mode_lib->ms.soc, @@ -6458,9 +6458,9 @@ static void dml_prefetch_check(struct display_mode_lib_st *mode_lib) mode_lib->ms.cursor_bw_pre, mode_lib->ms.prefetch_vmrow_bw, mode_lib->ms.NoOfDPPThisState, - mode_lib->ms.UrgentBurstFactorLuma, - mode_lib->ms.UrgentBurstFactorChroma, - mode_lib->ms.UrgentBurstFactorCursor, + mode_lib->ms.UrgentBurstFactorLuma[j], + mode_lib->ms.UrgentBurstFactorChroma[j], + mode_lib->ms.UrgentBurstFactorCursor[j], mode_lib->ms.UrgentBurstFactorLumaPre, mode_lib->ms.UrgentBurstFactorChromaPre, mode_lib->ms.UrgentBurstFactorCursorPre, @@ -6517,9 +6517,9 @@ static void dml_prefetch_check(struct display_mode_lib_st *mode_lib) mode_lib->ms.cursor_bw, mode_lib->ms.cursor_bw_pre, mode_lib->ms.NoOfDPPThisState, - mode_lib->ms.UrgentBurstFactorLuma, - mode_lib->ms.UrgentBurstFactorChroma, - mode_lib->ms.UrgentBurstFactorCursor, + mode_lib->ms.UrgentBurstFactorLuma[j], + mode_lib->ms.UrgentBurstFactorChroma[j], + mode_lib->ms.UrgentBurstFactorCursor[j], mode_lib->ms.UrgentBurstFactorLumaPre, mode_lib->ms.UrgentBurstFactorChromaPre, mode_lib->ms.UrgentBurstFactorCursorPre); @@ -6586,9 +6586,9 @@ static void dml_prefetch_check(struct display_mode_lib_st *mode_lib) mode_lib->ms.cursor_bw_pre, mode_lib->ms.prefetch_vmrow_bw, mode_lib->ms.NoOfDPP[j], // VBA_ERROR DPPPerSurface is not assigned at this point, should use NoOfDpp here - mode_lib->ms.UrgentBurstFactorLuma, - mode_lib->ms.UrgentBurstFactorChroma, - mode_lib->ms.UrgentBurstFactorCursor, + mode_lib->ms.UrgentBurstFactorLuma[j], + mode_lib->ms.UrgentBurstFactorChroma[j], + mode_lib->ms.UrgentBurstFactorCursor[j], mode_lib->ms.UrgentBurstFactorLumaPre, mode_lib->ms.UrgentBurstFactorChromaPre, mode_lib->ms.UrgentBurstFactorCursorPre, @@ -7809,9 +7809,9 @@ dml_bool_t dml_core_mode_support(struct display_mode_lib_st *mode_lib) mode_lib->ms.DETBufferSizeYThisState[k], mode_lib->ms.DETBufferSizeCThisState[k], /* Output */ - &mode_lib->ms.UrgentBurstFactorCursor[k], - &mode_lib->ms.UrgentBurstFactorLuma[k], - &mode_lib->ms.UrgentBurstFactorChroma[k], + &mode_lib->ms.UrgentBurstFactorCursor[j][k], + &mode_lib->ms.UrgentBurstFactorLuma[j][k], + &mode_lib->ms.UrgentBurstFactorChroma[j][k], &mode_lib->ms.NotUrgentLatencyHiding[k]); }
diff --git a/drivers/gpu/drm/amd/display/dc/dml2/display_mode_core_structs.h b/drivers/gpu/drm/amd/display/dc/dml2/display_mode_core_structs.h index f951936bb579e..504c427b3b319 100644 --- a/drivers/gpu/drm/amd/display/dc/dml2/display_mode_core_structs.h +++ b/drivers/gpu/drm/amd/display/dc/dml2/display_mode_core_structs.h @@ -884,11 +884,11 @@ struct mode_support_st { dml_uint_t meta_row_height[__DML_NUM_PLANES__]; dml_uint_t meta_row_height_chroma[__DML_NUM_PLANES__]; dml_float_t UrgLatency; - dml_float_t UrgentBurstFactorCursor[__DML_NUM_PLANES__]; + dml_float_t UrgentBurstFactorCursor[2][__DML_NUM_PLANES__]; dml_float_t UrgentBurstFactorCursorPre[__DML_NUM_PLANES__]; - dml_float_t UrgentBurstFactorLuma[__DML_NUM_PLANES__]; + dml_float_t UrgentBurstFactorLuma[2][__DML_NUM_PLANES__]; dml_float_t UrgentBurstFactorLumaPre[__DML_NUM_PLANES__]; - dml_float_t UrgentBurstFactorChroma[__DML_NUM_PLANES__]; + dml_float_t UrgentBurstFactorChroma[2][__DML_NUM_PLANES__]; dml_float_t UrgentBurstFactorChromaPre[__DML_NUM_PLANES__]; dml_float_t MaximumSwathWidthInLineBufferLuma; dml_float_t MaximumSwathWidthInLineBufferChroma;