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powerpc/5121: shared DIU framebuffer support

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MPC5121 DIU configuration/setup as initialized by the boot
loader currently will get lost while booting Linux. As a
result displaying the boot splash is not possible through
the boot process.

To prevent this we reserve configured DIU frame buffer
address range while booting and preserve AOI descriptor
and gamma table so that DIU continues displaying through
the whole boot process. On first open from user space
DIU frame buffer driver releases the reserved frame
buffer area and continues to operate as usual.

Signed-off-by: John Rigby <jcrigby@gmail.com>
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Acked-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Anatolij Gustschin
2010-07-23 04:00:37 +00:00
committed by Grant Likely
parent 0814a979a6
commit 4b5006ec7b
7 changed files with 338 additions and 2 deletions
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arch/powerpc/sysdev/fsl_soc.h
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@@ -30,6 +30,7 @@ struct platform_diu_data_ops {
void (*set_pixel_clock) (unsigned int pixclock);
ssize_t (*show_monitor_port) (int monitor_port, char *buf);
int (*set_sysfs_monitor_port) (int val);
void (*release_bootmem) (void);
};
extern struct platform_diu_data_ops diu_ops;