66 lines
1.8 KiB
Diff
66 lines
1.8 KiB
Diff
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Subject: [PATCH] Add quirk for the graphics adapter in some JSxx
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From: Tony Breeds <tony@bakeyournoodle.com>
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References: 461002 - LTC50817
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Patch-mainline: not yet
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These devices are set to 640x480 by firmware, switch them to
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800x600@60.
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Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
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Signed-off-by: Olaf Hering <olh@suse.de>
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---
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drivers/video/aty/radeon_monitor.c | 35 +++++++++++++++++++++++++++++++++++
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1 file changed, 35 insertions(+)
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--- a/drivers/video/aty/radeon_monitor.c
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+++ b/drivers/video/aty/radeon_monitor.c
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@@ -727,6 +727,25 @@ static void radeon_videomode_to_var(stru
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var->vmode = mode->vmode;
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}
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+#ifdef CONFIG_PPC_PSERIES
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+static int is_powerblade(const char *model)
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+{
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+ struct device_node *root;
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+ const char* cp;
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+ int len, l, rc = 0;
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+
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+ root = of_find_node_by_path("/");
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+ if (root && model) {
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+ l = strlen(model);
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+ cp = of_get_property(root, "model", &len);
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+ if (cp)
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+ rc = memcmp(model, cp, min(len, l)) == 0;
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+ of_node_put(root);
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+ }
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+ return rc;
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+}
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+#endif
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+
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/*
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* Build the modedb for head 1 (head 2 will come later), check panel infos
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* from either BIOS or EDID, and pick up the default mode
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@@ -862,6 +881,22 @@ void __devinit radeon_check_modes(struct
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has_default_mode = 1;
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}
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+#ifdef CONFIG_PPC_PSERIES
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+ if (!has_default_mode && (
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+ is_powerblade("IBM,8842") || /* JS20 */
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+ is_powerblade("IBM,8844") || /* JS21 */
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+ is_powerblade("IBM,7998") || /* JS12/JS21/JS22 */
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+ is_powerblade("IBM,0792") || /* QS21 */
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+ is_powerblade("IBM,0793") /* QS22 */
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+ )) {
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+ printk("Falling back to 800x600 on JSxx hardware\n");
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+ if (fb_find_mode(&info->var, info, "800x600@60",
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+ info->monspecs.modedb,
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+ info->monspecs.modedb_len, NULL, 8) != 0)
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+ has_default_mode = 1;
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+ }
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+#endif
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+
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/*
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* Still no mode, let's pick up a default from the db
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*/
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