mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

drm/omap: drop unneeded locking from mgr_fld_write() 

Commit d49cd15550 ("OMAPDSS: DISPC: lock
access to DISPC_CONTROL & DISPC_CONFIG") added locking to
mgr_fld_write(). This was needed in omapfb times due to lack of good
locking, especially in the case of both V4L2 and fbdev layers using the
DSS driver.

This is not needed for omapdrm, so we can remove the locking.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190930103840.18970-2-tomi.valkeinen@ti.com
This commit is contained in:
Tomi Valkeinen 2019-09-30 13:38:34 +03:00
parent dfc507b9eb
commit a9c4fbd544
1 changed files with 1 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/gpu/drm/omapdrm/dss/dispc.c
View File

@ -184,9 +184,6 @@ struct dispc_device {
struct regmap *syscon_pol;
u32 syscon_pol_offset;
/* DISPC_CONTROL & DISPC_CONFIG lock*/
spinlock_t control_lock;
};
enum omap_color_component {
@ -377,16 +374,8 @@ static void mgr_fld_write(struct dispc_device *dispc, enum omap_channel channel,
enum mgr_reg_fields regfld, int val)
{
const struct dispc_reg_field rfld = mgr_desc[channel].reg_desc[regfld];
const bool need_lock = rfld.reg == DISPC_CONTROL || rfld.reg == DISPC_CONFIG;
unsigned long flags;
if (need_lock) {
spin_lock_irqsave(&dispc->control_lock, flags);
REG_FLD_MOD(dispc, rfld.reg, val, rfld.high, rfld.low);
spin_unlock_irqrestore(&dispc->control_lock, flags);
} else {
REG_FLD_MOD(dispc, rfld.reg, val, rfld.high, rfld.low);
}
REG_FLD_MOD(dispc, rfld.reg, val, rfld.high, rfld.low);
}
static int dispc_get_num_ovls(struct dispc_device *dispc)
@ -4768,8 +4757,6 @@ static int dispc_bind(struct device *dev, struct device *master, void *data)
platform_set_drvdata(pdev, dispc);
dispc->dss = dss;
spin_lock_init(&dispc->control_lock);
/*
* The OMAP3-based models can't be told apart using the compatible
* string, use SoC device matching.