From: Ankit Nautiyal <[email protected]> Introduce intel_display_compute_link_m_n() to compute the link M/N ratio from the pixel clock and the link symbol clock. This logic was previously embedded within intel_link_compute_m_n(). The new helper allows reuse of link M/N computation in other contexts without requiring the full data M/N calculation and will be used in later commits.
No functional changes intended. v2: - Rename function (Jani) - The link symbol clock is passed in rather than derived here, so that the DP specific conversion from the link rate stays with the caller. (Jani) Signed-off-by: Ankit Nautiyal <[email protected]> Co-developed-by: Suraj Kandpal <[email protected]> Signed-off-by: Suraj Kandpal <[email protected]> Reviewed-by: Mitul Golani <[email protected]> --- drivers/gpu/drm/i915/display/intel_display.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index 7602f633f49d..580c36a52921 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -2650,13 +2650,20 @@ static void compute_m_n(u32 *ret_m, u32 *ret_n, intel_reduce_m_n_ratio(ret_m, ret_n); } +static void intel_display_compute_link_m_n(u32 *link_m, u32 *link_n, + int pixel_clock, int link_symbol_clock) +{ + compute_m_n(link_m, link_n, + pixel_clock, link_symbol_clock, + 0x80000); +} + void intel_link_compute_m_n(u16 bits_per_pixel_x16, int nlanes, int pixel_clock, int link_clock, int bw_overhead, struct intel_link_m_n *m_n) { - u32 link_symbol_clock = intel_dp_link_symbol_clock(link_clock); u32 data_m = intel_dp_effective_data_rate(pixel_clock, bits_per_pixel_x16, bw_overhead); u32 data_n = drm_dp_max_dprx_data_rate(link_clock, nlanes); @@ -2673,9 +2680,9 @@ intel_link_compute_m_n(u16 bits_per_pixel_x16, int nlanes, data_m, data_n, 0x8000000); - compute_m_n(&m_n->link_m, &m_n->link_n, - pixel_clock, link_symbol_clock, - 0x80000); + intel_display_compute_link_m_n(&m_n->link_m, &m_n->link_n, + pixel_clock, + intel_dp_link_symbol_clock(link_clock)); } void intel_panel_sanitize_ssc(struct intel_display *display) -- 2.34.1
