From 8cd36c63ba72824e92b0d8339df887f59a70d972 Mon Sep 17 00:00:00 2001 From: Dhinakaran Pandiyan Date: Fri, 21 Apr 2017 23:58:09 -0700 Subject: [PATCH] Revert "drm/i915/dp: reduce link M/N parameters" This reverts commit 9a86cda07af2 ("drm/i915/dp: reduce link M/N parameters") Signed-off-by: Dhinakaran Pandiyan --- drivers/gpu/drm/i915/intel_display.c | 11 ----------- 1 file changed, 11 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 3617927..180709c 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -6279,17 +6279,6 @@ intel_reduce_m_n_ratio(uint32_t *num, uint32_t *den) static void compute_m_n(unsigned int m, unsigned int n, uint32_t *ret_m, uint32_t *ret_n) { - /* - * Reduce M/N as much as possible without loss in precision. Several DP - * dongles in particular seem to be fussy about too large *link* M/N - * values. The passed in values are more likely to have the least - * significant bits zero than M after rounding below, so do this first. - */ - while ((m & 1) == 0 && (n & 1) == 0) { - m >>= 1; - n >>= 1; - } - *ret_n = min_t(unsigned int, roundup_pow_of_two(n), DATA_LINK_N_MAX); *ret_m = div_u64((uint64_t) m * *ret_n, n); intel_reduce_m_n_ratio(ret_m, ret_n); -- 2.7.4