diff options
| author | Jonathan Gray <jsg@cvs.openbsd.org> | 2023-06-13 03:05:49 +0000 |
|---|---|---|
| committer | Jonathan Gray <jsg@cvs.openbsd.org> | 2023-06-13 03:05:49 +0000 |
| commit | b04b3c4f6ab12a531c4d25c6d711a8fbff163987 (patch) | |
| tree | e04c97610b404ca659a501b30fff8f0ba89f3ea0 | |
| parent | 24f64a2f4ded6b4ed9bafe85706543eca31a4c61 (diff) | |
drm/amd/display: filter out invalid bits in pipe_fuses
From Samson Tam
4c1e747ca61c6103bcc259ad7f2fc6d53acff291 in linux-6.1.y/6.1.29
682439fffad9fa9a38d37dd1b1318e9374232213 in mainline linux
| -rw-r--r-- | sys/dev/pci/drm/amd/display/dc/dcn32/dcn32_resource.c | 10 | ||||
| -rw-r--r-- | sys/dev/pci/drm/amd/display/dc/dcn321/dcn321_resource.c | 10 |
2 files changed, 18 insertions, 2 deletions
diff --git a/sys/dev/pci/drm/amd/display/dc/dcn32/dcn32_resource.c b/sys/dev/pci/drm/amd/display/dc/dcn32/dcn32_resource.c index 903f80a8c20..814620e6638 100644 --- a/sys/dev/pci/drm/amd/display/dc/dcn32/dcn32_resource.c +++ b/sys/dev/pci/drm/amd/display/dc/dcn32/dcn32_resource.c @@ -2037,6 +2037,14 @@ static struct resource_funcs dcn32_res_pool_funcs = { .remove_phantom_pipes = dcn32_remove_phantom_pipes, }; +static uint32_t read_pipe_fuses(struct dc_context *ctx) +{ + uint32_t value = REG_READ(CC_DC_PIPE_DIS); + /* DCN32 support max 4 pipes */ + value = value & 0xf; + return value; +} + static bool dcn32_resource_construct( uint8_t num_virtual_links, @@ -2079,7 +2087,7 @@ static bool dcn32_resource_construct( pool->base.res_cap = &res_cap_dcn32; /* max number of pipes for ASIC before checking for pipe fuses */ num_pipes = pool->base.res_cap->num_timing_generator; - pipe_fuses = REG_READ(CC_DC_PIPE_DIS); + pipe_fuses = read_pipe_fuses(ctx); for (i = 0; i < pool->base.res_cap->num_timing_generator; i++) if (pipe_fuses & 1 << i) diff --git a/sys/dev/pci/drm/amd/display/dc/dcn321/dcn321_resource.c b/sys/dev/pci/drm/amd/display/dc/dcn321/dcn321_resource.c index d320e21680d..213ff3672bd 100644 --- a/sys/dev/pci/drm/amd/display/dc/dcn321/dcn321_resource.c +++ b/sys/dev/pci/drm/amd/display/dc/dcn321/dcn321_resource.c @@ -1621,6 +1621,14 @@ static struct resource_funcs dcn321_res_pool_funcs = { .remove_phantom_pipes = dcn32_remove_phantom_pipes, }; +static uint32_t read_pipe_fuses(struct dc_context *ctx) +{ + uint32_t value = REG_READ(CC_DC_PIPE_DIS); + /* DCN321 support max 4 pipes */ + value = value & 0xf; + return value; +} + static bool dcn321_resource_construct( uint8_t num_virtual_links, @@ -1663,7 +1671,7 @@ static bool dcn321_resource_construct( pool->base.res_cap = &res_cap_dcn321; /* max number of pipes for ASIC before checking for pipe fuses */ num_pipes = pool->base.res_cap->num_timing_generator; - pipe_fuses = REG_READ(CC_DC_PIPE_DIS); + pipe_fuses = read_pipe_fuses(ctx); for (i = 0; i < pool->base.res_cap->num_timing_generator; i++) if (pipe_fuses & 1 << i) |