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radeon_hd: Correct framebuffer pixel pitch alignment

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This commit is contained in:
Alexander von Gluck IV 2012-03-29 03:33:07 -05:00
parent 66bcbd98fc
commit 7e9cb02755
1 changed files with 25 additions and 7 deletions
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32
src/add-ons/accelerants/radeon_hd/display.cpp
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@ -599,8 +599,6 @@ display_crtc_fb_set(uint8 crtcID, display_mode* mode)
break;
}
uint32 bytesPerRow = mode->virtual_width * bytesPerPixel;
Write32(OUT, regs->vgaControl, 0);
uint64 fbAddress = gInfo->fb.vramStart;
@ -628,25 +626,45 @@ display_crtc_fb_set(uint8 crtcID, display_mode* mode)
Write32(CRT, regs->grphSwapControl, fbSwap);
}
// Align our framebuffer width
int widthAligned = mode->virtual_width;
int pitchMask = 0;
switch (bytesPerPixel) {
case 1:
pitchMask = 255;
break;
case 2:
pitchMask = 127;
break;
case 3:
case 4:
pitchMask = 63;
break;
}
widthAligned += pitchMask;
widthAligned &= ~pitchMask;
Write32(CRT, regs->grphSurfaceOffsetX, 0);
Write32(CRT, regs->grphSurfaceOffsetY, 0);
Write32(CRT, regs->grphXStart, 0);
Write32(CRT, regs->grphYStart, 0);
Write32(CRT, regs->grphXEnd, mode->virtual_width);
Write32(CRT, regs->grphYEnd, mode->virtual_height);
Write32(CRT, regs->grphPitch, (bytesPerRow / 4));
Write32(CRT, regs->grphPitch, widthAligned * bytesPerPixel / 4);
Write32(CRT, regs->grphEnable, 1);
// Enable Frame buffer
Write32(CRT, regs->modeDesktopHeight, mode->virtual_height);
uint32 viewport_w = mode->timing.h_display;
uint32 viewport_h = (mode->timing.v_display + 1) & ~1;
uint32 viewportWidth = mode->timing.h_display;
uint32 viewportHeight = (mode->timing.v_display + 1) & ~1;
Write32(CRT, regs->viewportStart, 0);
Write32(CRT, regs->viewportSize,
(viewport_w << 16) | viewport_h);
(viewportWidth << 16) | viewportHeight);
// Pageflip setup
if (info.dceMajor >= 4) {
@ -668,7 +686,7 @@ display_crtc_fb_set(uint8 crtcID, display_mode* mode)
}
// update shared info
gInfo->shared_info->bytes_per_row = bytesPerRow;
gInfo->shared_info->bytes_per_row = mode->virtual_width * bytesPerPixel;
gInfo->shared_info->current_mode = *mode;
gInfo->shared_info->bits_per_pixel = bitsPerPixel;
}