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Commit dbb3f2f7 authored by Thierry Reding's avatar Thierry Reding
Browse files

drm/tegra: dc - Move around shift clock programming 



Program the shift clock divider in tegra_crtc_setup_clk() since that's
where the divider is computed, so passing it around can be avoided.

Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent cb825d89

drivers/gpu/drm/tegra/dc.c

+10 −9
Original line number Diff line number Diff line
@@ -617,13 +617,14 @@ static int tegra_dc_set_timings(struct tegra_dc *dc, 
}



static int tegra_crtc_setup_clk(struct drm_crtc *crtc,

				struct drm_display_mode *mode,

				unsigned long *div)

				struct drm_display_mode *mode)

{

	unsigned long pclk = mode->clock * 1000, rate;

	struct tegra_dc *dc = to_tegra_dc(crtc);

	struct tegra_output *output = NULL;

	struct drm_encoder *encoder;

	unsigned int div;

	u32 value;

	long err;



	list_for_each_entry(encoder, &crtc->dev->mode_config.encoder_list, head)
@@ -646,9 +647,12 @@ static int tegra_crtc_setup_clk(struct drm_crtc *crtc, 
	}



	rate = clk_get_rate(dc->clk);

	*div = (rate * 2 / pclk) - 2;

	div = (rate * 2 / pclk) - 2;



	DRM_DEBUG_KMS("rate: %lu, div: %lu\n", rate, *div);

	DRM_DEBUG_KMS("rate: %lu, div: %u\n", rate, div);



	value = SHIFT_CLK_DIVIDER(div) | PIXEL_CLK_DIVIDER_PCD1;

	tegra_dc_writel(dc, value, DC_DISP_DISP_CLOCK_CONTROL);



	return 0;

}
@@ -661,12 +665,12 @@ static int tegra_crtc_mode_set(struct drm_crtc *crtc, 
	struct tegra_bo *bo = tegra_fb_get_plane(crtc->primary->fb, 0);

	struct tegra_dc *dc = to_tegra_dc(crtc);

	struct tegra_dc_window window;

	unsigned long div, value;

	u32 value;

	int err;



	drm_vblank_pre_modeset(crtc->dev, dc->pipe);



	err = tegra_crtc_setup_clk(crtc, mode, &div);

	err = tegra_crtc_setup_clk(crtc, mode);

	if (err) {

		dev_err(dc->dev, "failed to setup clock for CRTC: %d\n", err);

		return err;
@@ -682,9 +686,6 @@ static int tegra_crtc_mode_set(struct drm_crtc *crtc, 
		tegra_dc_writel(dc, value, DC_DISP_INTERLACE_CONTROL);

	}



	value = SHIFT_CLK_DIVIDER(div) | PIXEL_CLK_DIVIDER_PCD1;

	tegra_dc_writel(dc, value, DC_DISP_DISP_CLOCK_CONTROL);



	/* setup window parameters */

	memset(&window, 0, sizeof(window));

	window.src.x = 0;