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OMAP: DSS2: Check for SDI HW before accessing SDI registers

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Only OMAP 3430 hardware has SDI support. The availability of SDI HW can
be found out by checking if the LCD channel supports SDI displays.

This patch checks for SDI HW support before accessing SDI registers,
which fixes a crash on OMAP4 when SDI SW support is compiled in.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Tomi Valkeinen 2011-02-24 14:18:50 +02:00
parent f8df01f1a4
commit 6ec549e50b
1 changed files with 18 additions and 11 deletions
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29
drivers/video/omap2/dss/dss.c
View file

@ -32,6 +32,7 @@
#include <plat/display.h>
#include <plat/clock.h>
#include "dss.h"
#include "dss_features.h"
#define DSS_SZ_REGS SZ_512
@ -110,10 +111,11 @@ void dss_save_context(void)
SR(SYSCONFIG);
SR(CONTROL);
#ifdef CONFIG_OMAP2_DSS_SDI
SR(SDI_CONTROL);
SR(PLL_CONTROL);
#endif
if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) &
OMAP_DISPLAY_TYPE_SDI) {
SR(SDI_CONTROL);
SR(PLL_CONTROL);
}
}
void dss_restore_context(void)
@ -124,10 +126,11 @@ void dss_restore_context(void)
RR(SYSCONFIG);
RR(CONTROL);
#ifdef CONFIG_OMAP2_DSS_SDI
RR(SDI_CONTROL);
RR(PLL_CONTROL);
#endif
if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) &
OMAP_DISPLAY_TYPE_SDI) {
RR(SDI_CONTROL);
RR(PLL_CONTROL);
}
}
#undef SR
@ -259,9 +262,13 @@ void dss_dump_regs(struct seq_file *s)
DUMPREG(DSS_SYSSTATUS);
DUMPREG(DSS_IRQSTATUS);
DUMPREG(DSS_CONTROL);
DUMPREG(DSS_SDI_CONTROL);
DUMPREG(DSS_PLL_CONTROL);
DUMPREG(DSS_SDI_STATUS);
if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) &
OMAP_DISPLAY_TYPE_SDI) {
DUMPREG(DSS_SDI_CONTROL);
DUMPREG(DSS_PLL_CONTROL);
DUMPREG(DSS_SDI_STATUS);
}
dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK);
#undef DUMPREG