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Commit 40495089 authored by Lucas Stach's avatar Lucas Stach Committed by Dave Airlie
Browse files

drm: tegra: fix front_porch <-> back_porch mixup 



Fixes wrong picture offset observed when using HDMI output with a
Technisat HD TV.

Signed-off-by: default avatarLucas Stach <dev@lynxeye.de>
Acked-by: default avatarMark Zhang <markz@nvidia.com>
Tested-by: default avatarMark Zhang <markz@nvidia.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 8be0e5c4

drivers/gpu/drm/tegra/dc.c

+4 −4
Original line number Diff line number Diff line
@@ -102,12 +102,12 @@ static int tegra_dc_set_timings(struct tegra_dc *dc, 
		((mode->hsync_end - mode->hsync_start) <<  0);

	tegra_dc_writel(dc, value, DC_DISP_SYNC_WIDTH);



	value = ((mode->vsync_start - mode->vdisplay) << 16) |

		((mode->hsync_start - mode->hdisplay) <<  0);

	tegra_dc_writel(dc, value, DC_DISP_BACK_PORCH);



	value = ((mode->vtotal - mode->vsync_end) << 16) |

		((mode->htotal - mode->hsync_end) <<  0);

	tegra_dc_writel(dc, value, DC_DISP_BACK_PORCH);



	value = ((mode->vsync_start - mode->vdisplay) << 16) |

		((mode->hsync_start - mode->hdisplay) <<  0);

	tegra_dc_writel(dc, value, DC_DISP_FRONT_PORCH);



	value = (mode->vdisplay << 16) | mode->hdisplay;

drivers/gpu/drm/tegra/hdmi.c

+3 −3
Original line number Diff line number Diff line
@@ -479,7 +479,7 @@ static void tegra_hdmi_setup_avi_infoframe(struct tegra_hdmi *hdmi, 
		return;

	}



	h_front_porch = mode->htotal - mode->hsync_end;

	h_front_porch = mode->hsync_start - mode->hdisplay;

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

	frame.r = HDMI_AVI_R_SAME;
@@ -634,8 +634,8 @@ static int tegra_output_hdmi_enable(struct tegra_output *output) 


	pclk = mode->clock * 1000;

	h_sync_width = mode->hsync_end - mode->hsync_start;

	h_front_porch = mode->htotal - mode->hsync_end;

	h_back_porch = mode->hsync_start - mode->hdisplay;

	h_back_porch = mode->htotal - mode->hsync_end;

	h_front_porch = mode->hsync_start - mode->hdisplay;



	err = regulator_enable(hdmi->vdd);

	if (err < 0) {