Commit 030778ab authored by Ville Syrjälä's avatar Ville Syrjälä
Browse files

drm/i915: Extract increase_wm_latency() 



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

Reviewed-by: default avatarLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250919193000.17665-8-ville.syrjala@linux.intel.com
parent 91acc631

drivers/gpu/drm/i915/display/skl_watermark.c

+17 −11
Original line number Diff line number Diff line
@@ -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+