Blame SOURCES/0001-modesetting-software-cursor-hack.patch

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From 846596b38165e5170d1a410f37ce7c5280db649d Mon Sep 17 00:00:00 2001
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From: Adam Jackson <ajax@redhat.com>
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Date: Tue, 9 May 2017 17:02:17 -0400
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Subject: [PATCH] modesetting: software cursor hack
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Signed-off-by: Adam Jackson <ajax@redhat.com>
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---
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 hw/xfree86/drivers/modesetting/driver.c | 30 +++++++++++++++++++++++++++---
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 1 file changed, 27 insertions(+), 3 deletions(-)
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diff --git a/hw/xfree86/drivers/modesetting/driver.c b/hw/xfree86/drivers/modesetting/driver.c
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index 3da69a3..31a58fd 100644
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--- a/hw/xfree86/drivers/modesetting/driver.c
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+++ b/hw/xfree86/drivers/modesetting/driver.c
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@@ -878,6 +878,30 @@ ms_get_drm_master_fd(ScrnInfoPtr pScrn)
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 }
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 static Bool
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+msDefaultSoftwareCursor(modesettingPtr ms)
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+{
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+    Bool ret = FALSE;
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+    drmVersionPtr v = drmGetVersion(ms->fd);
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+
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+    /*
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+     * This is horrific, don't hate me.  The _runtime_ fallback to software
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+     * cursor doesn't seem to take on the first try; you get no cursor in
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+     * gdm, but it works once you log in.  However just bombing out at
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+     * init time seems to work fine.  So for drivers without hardware cursors
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+     * (or for G200SE, where they're basically unusable) just default to sw.
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+     */
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+    if (!strcmp(v->name, "udl") ||
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+	!strcmp(v->name, "mgag200") ||
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+	!strcmp(v->name, "cirrus") ||
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+	!strcmp(v->name, "ast"))
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+	ret = TRUE;
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+
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+    drmFreeVersion(v);
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+
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+    return ret;
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+}
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+
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+static Bool
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 PreInit(ScrnInfoPtr pScrn, int flags)
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 {
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     modesettingPtr ms;
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@@ -966,9 +990,9 @@ PreInit(ScrnInfoPtr pScrn, int flags)
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     if (!xf86SetDefaultVisual(pScrn, -1))
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         return FALSE;
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-    if (xf86ReturnOptValBool(ms->drmmode.Options, OPTION_SW_CURSOR, FALSE)) {
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-        ms->drmmode.sw_cursor = TRUE;
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-    }
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+    if (!xf86GetOptValBool(ms->drmmode.Options, OPTION_SW_CURSOR,
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+			   &ms->drmmode.sw_cursor))
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+	ms->drmmode.sw_cursor = msDefaultSoftwareCursor(ms);
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     ms->cursor_width = 64;
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     ms->cursor_height = 64;
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-- 
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2.12.0
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