diff options
| author | Alex Deucher <alexdeucher@gmail.com> | 2009-11-23 18:40:40 -0500 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2009-12-08 10:22:43 +1000 |
| commit | f92a8b6758bdc0f277c4f42aa7d736a205ac9ded (patch) | |
| tree | 3feb11b2cb76229767c42a4a3d34d6e525b73364 /drivers/gpu/drm/radeon/atombios_dp.c | |
| parent | 4143e919ea999c9356ae4f71b5a3a80e075290d5 (diff) | |
drm/radeon/kms: handle dp sinks in atom encoder/transmitter tables
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/atombios_dp.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/atombios_dp.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c index e761fefaacb..76eb5c8a701 100644 --- a/drivers/gpu/drm/radeon/atombios_dp.c +++ b/drivers/gpu/drm/radeon/atombios_dp.c @@ -33,6 +33,75 @@ #define DP_LINK_STATUS_SIZE 6 +/* move these to drm_dp_helper.c/h */ + +static const int dp_clocks[] = { + 54000, // 1 lane, 1.62 Ghz + 90000, // 1 lane, 2.70 Ghz + 108000, // 2 lane, 1.62 Ghz + 180000, // 2 lane, 2.70 Ghz + 216000, // 4 lane, 1.62 Ghz + 360000, // 4 lane, 2.70 Ghz +}; + +static const int num_dp_clocks = sizeof(dp_clocks) / sizeof(int); + +int dp_lanes_for_mode_clock(int max_link_bw, int mode_clock) +{ + int i; + + switch (max_link_bw) { + case DP_LINK_BW_1_62: + default: + for (i = 0; i < num_dp_clocks; i++) { + if (i % 2) + continue; + if (dp_clocks[i] > mode_clock) { + if (i < 2) + return 1; + else if (i < 4) + return 2; + else + return 4; + } + } + break; + case DP_LINK_BW_2_7: + for (i = 0; i < num_dp_clocks; i++) { + if (dp_clocks[i] > mode_clock) { + if (i < 2) + return 1; + else if (i < 4) + return 2; + else + return 4; + } + } + break; + } + + return 0; +} + +int dp_link_clock_for_mode_clock(int max_link_bw, int mode_clock) +{ + int i; + + switch (max_link_bw) { + case DP_LINK_BW_1_62: + default: + return 162000; + break; + case DP_LINK_BW_2_7: + for (i = 0; i < num_dp_clocks; i++) { + if (dp_clocks[i] > mode_clock) + return (i % 2) ? 270000 : 162000; + } + } + + return 0; +} + bool radeon_process_aux_ch(struct radeon_i2c_chan *chan, u8 *req_bytes, int num_bytes, u8 *read_byte, u8 read_buf_len, u8 delay) |