diff options
| author | Chandan Uddaraju <chandanu@codeaurora.org> | 2020-08-27 14:16:54 -0700 |
|---|---|---|
| committer | Rob Clark <robdclark@chromium.org> | 2020-09-15 10:54:33 -0700 |
| commit | b22960b8f274382ff165db50faebbde5f8a16c32 (patch) | |
| tree | 4d4e728417a64e8b503ac29a7d17c576ce36c7ca | |
| parent | 2fb7487aaf71071e02986ccd9c981ba1a790880e (diff) | |
drm: add constant N value in helper file
The constant N value (0x8000) is used by i915 DP
driver. Define this value in dp helper header file
to use in multiple Display Port drivers. Change
i915 driver accordingly.
Change in v6: Change commit message
Signed-off-by: Chandan Uddaraju <chandanu@codeaurora.org>
Signed-off-by: Vara Reddy <varar@codeaurora.org>
Signed-off-by: Tanmay Shah <tanmay@codeaurora.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Rob Clark <robdclark@chromium.org>
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_display.c | 2 | ||||
| -rw-r--r-- | include/drm/drm_dp_helper.h | 1 |
2 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index 729ec6e0d43a..10b8310f290b 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -8114,7 +8114,7 @@ static void compute_m_n(unsigned int m, unsigned int n, * which the devices expect also in synchronous clock mode. */ if (constant_n) - *ret_n = 0x8000; + *ret_n = DP_LINK_CONSTANT_N_VALUE; else *ret_n = min_t(unsigned int, roundup_pow_of_two(n), DATA_LINK_N_MAX); diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index e47dc22ebf50..a31d7aebb8b8 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -1134,6 +1134,7 @@ #define DP_MST_PHYSICAL_PORT_0 0 #define DP_MST_LOGICAL_PORT_0 8 +#define DP_LINK_CONSTANT_N_VALUE 0x8000 #define DP_LINK_STATUS_SIZE 6 bool drm_dp_channel_eq_ok(const u8 link_status[DP_LINK_STATUS_SIZE], int lane_count); |