Commit b22960b8 authored by Chandan Uddaraju's avatar Chandan Uddaraju Committed by Rob Clark

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: default avatarChandan Uddaraju <chandanu@codeaurora.org>
Signed-off-by: default avatarVara Reddy <varar@codeaurora.org>
Signed-off-by: default avatarTanmay Shah <tanmay@codeaurora.org>
Reviewed-by: default avatarStephen Boyd <swboyd@chromium.org>
Acked-by: default avatarJani Nikula <jani.nikula@intel.com>
Signed-off-by: default avatarRob Clark <robdclark@chromium.org>
parent 2fb7487a
...@@ -8114,7 +8114,7 @@ static void compute_m_n(unsigned int m, unsigned int n, ...@@ -8114,7 +8114,7 @@ static void compute_m_n(unsigned int m, unsigned int n,
* which the devices expect also in synchronous clock mode. * which the devices expect also in synchronous clock mode.
*/ */
if (constant_n) if (constant_n)
*ret_n = 0x8000; *ret_n = DP_LINK_CONSTANT_N_VALUE;
else else
*ret_n = min_t(unsigned int, roundup_pow_of_two(n), DATA_LINK_N_MAX); *ret_n = min_t(unsigned int, roundup_pow_of_two(n), DATA_LINK_N_MAX);
......
...@@ -1134,6 +1134,7 @@ ...@@ -1134,6 +1134,7 @@
#define DP_MST_PHYSICAL_PORT_0 0 #define DP_MST_PHYSICAL_PORT_0 0
#define DP_MST_LOGICAL_PORT_0 8 #define DP_MST_LOGICAL_PORT_0 8
#define DP_LINK_CONSTANT_N_VALUE 0x8000
#define DP_LINK_STATUS_SIZE 6 #define DP_LINK_STATUS_SIZE 6
bool drm_dp_channel_eq_ok(const u8 link_status[DP_LINK_STATUS_SIZE], bool drm_dp_channel_eq_ok(const u8 link_status[DP_LINK_STATUS_SIZE],
int lane_count); int lane_count);
......
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