Introduce `intel_display_get_link_m_n()` to compute the link M/N ratio
based on pixel clock and link 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.
No functional changes intended.
Signed-off-by: Ankit Nautiyal <ankit.k.nauti...@intel.com>
---
drivers/gpu/drm/i915/display/intel_display.c | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c
b/drivers/gpu/drm/i915/display/intel_display.c
index 456fc4b04cda..671491a2a3b6 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -2506,13 +2506,24 @@ static void compute_m_n(u32 *ret_m, u32 *ret_n,
intel_reduce_m_n_ratio(ret_m, ret_n);
}
+static
+void intel_display_get_link_m_n(u32 *link_m, u32 *link_n,
+ u32 pixel_clock,
+ u32 link_clock)
+{
+ u32 link_symbol_clock = intel_dp_link_symbol_clock(link_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);
@@ -2529,9 +2540,8 @@ 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_get_link_m_n(&m_n->link_m, &m_n->link_n,
+ pixel_clock, link_clock);
}
void intel_panel_sanitize_ssc(struct intel_display *display)
--
2.45.2
