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drm/i915: Extract increase_wm_latency()

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Extract the "increase wm latencies by some amount" code into
a helper that can be reused.

Reviewed-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250919193000.17665-8-ville.syrjala@linux.intel.com
This commit is contained in:
Ville Syrjälä
2025-09-19 22:29:54 +03:00
parent 91acc63178
commit 030778ab8d
1 changed files with 17 additions and 11 deletions
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28
drivers/gpu/drm/i915/display/skl_watermark.c
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@@ -3183,6 +3183,21 @@ static void multiply_wm_latency(struct intel_display *display, int mult)
wm[level] *= mult;
}
static void increase_wm_latency(struct intel_display *display, int inc)
{
u16 *wm = display->wm.skl_latency;
int level, num_levels = display->wm.num_levels;
wm[0] += inc;
for (level = 1; level < num_levels; level++) {
if (wm[level] == 0)
break;
wm[level] += inc;
}
}
static bool need_16gb_dimm_wa(struct intel_display *display)
{
const struct dram_info *dram_info = intel_dram_info(display->drm);
@@ -3207,7 +3222,6 @@ adjust_wm_latency(struct intel_display *display)
{
u16 *wm = display->wm.skl_latency;
int i, level, num_levels = display->wm.num_levels;
int read_latency = wm_read_latency(display);
if (display->platform.dg2)
multiply_wm_latency(display, 2);
@@ -3232,16 +3246,8 @@ adjust_wm_latency(struct intel_display *display)
* to add proper adjustment to each valid level we retrieve
* from the punit when level 0 response data is 0us.
*/
if (wm[0] == 0) {
wm[0] += read_latency;
for (level = 1; level < num_levels; level++) {
if (wm[level] == 0)
break;
wm[level] += read_latency;
}
}
if (wm[0] == 0)
increase_wm_latency(display, wm_read_latency(display));
/*
* WA Level-0 adjustment for 16Gb+ DIMMs: SKL+