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drm/i915: Don't change the blank/sync width when calculating scaled modes

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Also, use the border instead of border minus one.

At the same time, make sure the horizontal border and hsync are even for
the LVDS that works in dual-channel mode. So both horizontal border and hsync
start are also changed to be even, even for the LVDS in single-channel mode.

https://bugs.freedesktop.org/show_bug.cgi?id=20951

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Zhao Yakui 2009-06-22 15:31:26 +08:00 committed by Eric Anholt
parent 3fbe18d65d
commit aa0261f230
1 changed files with 73 additions and 18 deletions
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91
drivers/gpu/drm/i915/intel_lvds.c
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@ -246,6 +246,9 @@ static bool intel_lvds_mode_fixup(struct drm_encoder *encoder,
bool border = 0;
int panel_ratio, desired_ratio, vert_scale, horiz_scale;
int horiz_ratio, vert_ratio;
u32 hsync_width, vsync_width;
u32 hblank_width, vblank_width;
u32 hsync_pos, vsync_pos;
/* Should never happen!! */
if (!IS_I965G(dev) && intel_crtc->pipe == 0) {
@ -306,6 +309,14 @@ static bool intel_lvds_mode_fixup(struct drm_encoder *encoder,
pfit_control |= (intel_crtc->pipe << PFIT_PIPE_SHIFT) |
PFIT_FILTER_FUZZY;
hsync_width = adjusted_mode->crtc_hsync_end -
adjusted_mode->crtc_hsync_start;
vsync_width = adjusted_mode->crtc_vsync_end -
adjusted_mode->crtc_vsync_start;
hblank_width = adjusted_mode->crtc_hblank_end -
adjusted_mode->crtc_hblank_start;
vblank_width = adjusted_mode->crtc_vblank_end -
adjusted_mode->crtc_vblank_start;
/*
* Deal with panel fitting options. Figure out how to stretch the
* image based on its aspect ratio & the current panel fitting mode.
@ -339,23 +350,39 @@ static bool intel_lvds_mode_fixup(struct drm_encoder *encoder,
bottom_border++;
/* Set active & border values */
adjusted_mode->crtc_hdisplay = mode->hdisplay;
/* Keep the boder be even */
if (right_border & 1)
right_border++;
/* use the border directly instead of border minuse one */
adjusted_mode->crtc_hblank_start = mode->hdisplay +
right_border - 1;
adjusted_mode->crtc_hblank_end = adjusted_mode->crtc_htotal -
left_border - 1;
right_border;
/* keep the blank width constant */
adjusted_mode->crtc_hblank_end =
adjusted_mode->crtc_hblank_start + hblank_width;
/* get the hsync pos relative to hblank start */
hsync_pos = (hblank_width - hsync_width) / 2;
/* keep the hsync pos be even */
if (hsync_pos & 1)
hsync_pos++;
adjusted_mode->crtc_hsync_start =
adjusted_mode->crtc_hblank_start;
adjusted_mode->crtc_hblank_start + hsync_pos;
/* keep the hsync width constant */
adjusted_mode->crtc_hsync_end =
adjusted_mode->crtc_hblank_end;
adjusted_mode->crtc_hsync_start + hsync_width;
adjusted_mode->crtc_vdisplay = mode->vdisplay;
/* use the border instead of border minus one */
adjusted_mode->crtc_vblank_start = mode->vdisplay +
bottom_border - 1;
adjusted_mode->crtc_vblank_end = adjusted_mode->crtc_vtotal -
top_border - 1;
bottom_border;
/* keep the vblank width constant */
adjusted_mode->crtc_vblank_end =
adjusted_mode->crtc_vblank_start + vblank_width;
/* get the vsync start postion relative to vblank start */
vsync_pos = (vblank_width - vsync_width) / 2;
adjusted_mode->crtc_vsync_start =
adjusted_mode->crtc_vblank_start;
adjusted_mode->crtc_vblank_start + vsync_pos;
/* keep the vsync width constant */
adjusted_mode->crtc_vsync_end =
adjusted_mode->crtc_vblank_end;
adjusted_mode->crtc_vblank_start + vsync_width;
border = 1;
break;
case DRM_MODE_SCALE_ASPECT:
@ -400,15 +427,32 @@ static bool intel_lvds_mode_fixup(struct drm_encoder *encoder,
right_border = left_border;
if (mode->hdisplay & 1) /* odd resolutions */
right_border++;
/* keep the border be even */
if (right_border & 1)
right_border++;
adjusted_mode->crtc_hdisplay = scaled_width;
/* use border instead of border minus one */
adjusted_mode->crtc_hblank_start =
scaled_width + right_border - 1;
scaled_width + right_border;
/* keep the hblank width constant */
adjusted_mode->crtc_hblank_end =
adjusted_mode->crtc_htotal - left_border - 1;
adjusted_mode->crtc_hblank_start +
hblank_width;
/*
* get the hsync start pos relative to
* hblank start
*/
hsync_pos = (hblank_width - hsync_width) / 2;
/* keep the hsync_pos be even */
if (hsync_pos & 1)
hsync_pos++;
adjusted_mode->crtc_hsync_start =
adjusted_mode->crtc_hblank_start;
adjusted_mode->crtc_hblank_start +
hsync_pos;
/* keept hsync width constant */
adjusted_mode->crtc_hsync_end =
adjusted_mode->crtc_hblank_end;
adjusted_mode->crtc_hsync_start +
hsync_width;
border = 1;
} else if (panel_ratio < desired_ratio) { /* letter */
u32 scaled_height = mode->vdisplay *
@ -424,14 +468,25 @@ static bool intel_lvds_mode_fixup(struct drm_encoder *encoder,
if (mode->vdisplay & 1)
bottom_border++;
adjusted_mode->crtc_vdisplay = scaled_height;
/* use border instead of border minus one */
adjusted_mode->crtc_vblank_start =
scaled_height + bottom_border - 1;
scaled_height + bottom_border;
/* keep the vblank width constant */
adjusted_mode->crtc_vblank_end =
adjusted_mode->crtc_vtotal - top_border - 1;
adjusted_mode->crtc_vblank_start +
vblank_width;
/*
* get the vsync start pos relative to
* vblank start
*/
vsync_pos = (vblank_width - vsync_width) / 2;
adjusted_mode->crtc_vsync_start =
adjusted_mode->crtc_vblank_start;
adjusted_mode->crtc_vblank_start +
vsync_pos;
/* keep the vsync width constant */
adjusted_mode->crtc_vsync_end =
adjusted_mode->crtc_vblank_end;
adjusted_mode->crtc_vsync_start +
vsync_width;
border = 1;
} else {
/* Aspects match, Let hw scale both directions */