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drm/ast: Validate DRM display modes against VBIOS modes

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Test DRM display modes against the list of modes supported by the
VBIOS. The helper will respect the supported-modes flags in struct
ast_device. Hence only DRM display modes supported by the VBIOS
will be reported; without the current duplication of this information.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250131092257.115596-12-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann
2025-01-31 10:21:11 +01:00
parent 517e28d40c
commit 2e90349bf4
1 changed files with 5 additions and 57 deletions
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62
drivers/gpu/drm/ast/ast_mode.c
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@@ -950,65 +950,13 @@ static enum drm_mode_status
ast_crtc_helper_mode_valid(struct drm_crtc *crtc, const struct drm_display_mode *mode)
{
struct ast_device *ast = to_ast_device(crtc->dev);
enum drm_mode_status status;
const struct ast_vbios_enhtable *vmode;
if (ast->support_wsxga_p) {
if ((mode->hdisplay == 1680) && (mode->vdisplay == 1050))
return MODE_OK;
if ((mode->hdisplay == 1280) && (mode->vdisplay == 800))
return MODE_OK;
if ((mode->hdisplay == 1440) && (mode->vdisplay == 900))
return MODE_OK;
if ((mode->hdisplay == 1360) && (mode->vdisplay == 768))
return MODE_OK;
if ((mode->hdisplay == 1600) && (mode->vdisplay == 900))
return MODE_OK;
vmode = ast_vbios_find_mode(ast, mode);
if (!vmode)
return MODE_NOMODE;
if (ast->support_fullhd) {
if ((mode->hdisplay == 1920) && (mode->vdisplay == 1080))
return MODE_OK;
if ((mode->hdisplay == 1920) && (mode->vdisplay == 1200)) {
if (ast->support_wuxga)
return MODE_OK;
else
return MODE_NOMODE;
}
}
}
status = MODE_NOMODE;
switch (mode->hdisplay) {
case 640:
if (mode->vdisplay == 480)
status = MODE_OK;
break;
case 800:
if (mode->vdisplay == 600)
status = MODE_OK;
break;
case 1024:
if (mode->vdisplay == 768)
status = MODE_OK;
break;
case 1152:
if (mode->vdisplay == 864)
status = MODE_OK;
break;
case 1280:
if (mode->vdisplay == 1024)
status = MODE_OK;
break;
case 1600:
if (mode->vdisplay == 1200)
status = MODE_OK;
break;
default:
break;
}
return status;
return MODE_OK;
}
static void ast_crtc_helper_mode_set_nofb(struct drm_crtc *crtc)