Commit d8cd587d authored by Martin Leung's avatar Martin Leung Committed by Alex Deucher
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drm/amd/display: removing MODULO change for dcn2



[why]
when resetting pipes from 480p to dual-pipe 8k, modulo reg write for
video optimized rate updated one pipe without changing the other, causing
sync error

[how]
removed code from dcn2

Signed-off-by: default avatarMartin Leung <martin.leung@amd.com>
Reviewed-by: default avatarJun Lei <Jun.Lei@amd.com>
Acked-by: default avatarLeo Li <sunpeng.li@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 03fd87db
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+0 −28
Original line number Diff line number Diff line
@@ -1046,41 +1046,13 @@ static const struct pixel_rate_range_table_entry video_optimized_pixel_rates[] =
	{108100, 108110, 108000, 1001, 1000},//108Mhz
};

static const struct pixel_rate_range_table_entry *look_up_in_video_optimized_rate_tlb(
		unsigned int pixel_rate_khz)
{
	int i;

	for (i = 0; i < NUM_ELEMENTS(video_optimized_pixel_rates); i++) {
		const struct pixel_rate_range_table_entry *e = &video_optimized_pixel_rates[i];

		if (e->range_min_khz <= pixel_rate_khz && pixel_rate_khz <= e->range_max_khz) {
			return e;
		}
	}

	return NULL;
}

static bool dcn20_program_pix_clk(
		struct clock_source *clock_source,
		struct pixel_clk_params *pix_clk_params,
		struct pll_settings *pll_settings)
{
	struct dce110_clk_src *clk_src = TO_DCE110_CLK_SRC(clock_source);
	unsigned int inst = pix_clk_params->controller_id - CONTROLLER_ID_D0;
	unsigned int dp_dto_ref_khz = clock_source->ctx->dc->clk_mgr->dprefclk_khz;
	const struct pixel_rate_range_table_entry *e =
			look_up_in_video_optimized_rate_tlb(pll_settings->actual_pix_clk_100hz / 10);

	dce112_program_pix_clk(clock_source, pix_clk_params, pll_settings);

	if (e) {
		/* Set DTO values: phase = target clock, modulo = reference clock */
		REG_WRITE(PHASE[inst], e->target_pixel_rate_khz * e->mult_factor);
		REG_WRITE(MODULO[inst], dp_dto_ref_khz * e->div_factor);
	}

	return true;
}