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| author | Madhav Chauhan | 2017-05-09 15:29:24 +0200 |
|---|---|---|
| committer | Jani Nikula | 2017-05-15 17:29:46 +0200 |
| commit | 1fdd783e9ce3a60c99f4da0d844d17b7c3ef8aef (patch) | |
| tree | 2a0f6df8628c1d3abdc9e3ec8ad5298cc2428d11 /drivers/gpu/drm/i915/intel_dsi_vbt.c | |
| parent | drm/i915: Fixup 64bit divides in timelines selftest (diff) | |
| download | kernel-qcow2-linux-1fdd783e9ce3a60c99f4da0d844d17b7c3ef8aef.tar.gz kernel-qcow2-linux-1fdd783e9ce3a60c99f4da0d844d17b7c3ef8aef.tar.xz kernel-qcow2-linux-1fdd783e9ce3a60c99f4da0d844d17b7c3ef8aef.zip | |
drm/i915/glk: Calculate high/low switch count for GLK
As per BSPEC, high/low switch count to be programmed in
terms of byteclock using exit_zero_count and prep_count.
For Geminilake exit/prep counts are already calculated
in terms of byteclock. This patch calculates high/low
switch count using counts value in byteclock, old calculation
leads to screen flicker/shift issue while resuming from S3/S4.
Signed-off-by: Madhav Chauhan <madhav.chauhan@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1494336565-19185-1-git-send-email-madhav.chauhan@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dsi_vbt.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dsi_vbt.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/intel_dsi_vbt.c b/drivers/gpu/drm/i915/intel_dsi_vbt.c index 0dce7792643a..7158c7ce9c09 100644 --- a/drivers/gpu/drm/i915/intel_dsi_vbt.c +++ b/drivers/gpu/drm/i915/intel_dsi_vbt.c @@ -694,8 +694,8 @@ bool intel_dsi_vbt_init(struct intel_dsi *intel_dsi, u16 panel_id) clk_zero_cnt << 8 | prepare_cnt; /* - * LP to HS switch count = 4TLPX + PREP_COUNT * 2 + EXIT_ZERO_COUNT * 2 - * + 10UI + Extra Byte Count + * LP to HS switch count = 4TLPX + PREP_COUNT * mul + EXIT_ZERO_COUNT * + * mul + 10UI + Extra Byte Count * * HS to LP switch count = THS-TRAIL + 2TLPX + Extra Byte Count * Extra Byte Count is calculated according to number of lanes. @@ -708,8 +708,8 @@ bool intel_dsi_vbt_init(struct intel_dsi *intel_dsi, u16 panel_id) /* B044 */ /* FIXME: * The comment above does not match with the code */ - lp_to_hs_switch = DIV_ROUND_UP(4 * tlpx_ui + prepare_cnt * 2 + - exit_zero_cnt * 2 + 10, 8); + lp_to_hs_switch = DIV_ROUND_UP(4 * tlpx_ui + prepare_cnt * mul + + exit_zero_cnt * mul + 10, 8); hs_to_lp_switch = DIV_ROUND_UP(mipi_config->ths_trail + 2 * tlpx_ui, 8); |