OMAPDSS: HDMI: Add locking for hdmi interface set timing functions

The hdmi interface driver exposes functions to the hdmi panel driver to
configure the interface timings maintained by the hdmi driver.

These timings(stored in hdmi.ip_data.cfg) should be protected by the hdmi lock
to ensure they are called sequentially, this is similar to how hdmi enable and
disable functions need locking.

Signed-off-by: Archit Taneja <archit@ti.com>

diff --git a/drivers/video/omap2/dss/hdmi.c b/drivers/video/omap2/dss/hdmi.c
index 964a19500c0e696a53d5145c80fc0e825ede08fe..0cdf24673d48d74050ac56a72b08556bd1777151 100644 (file)
--- a/drivers/video/omap2/dss/hdmi.c
+++ b/drivers/video/omap2/dss/hdmi.c
@@ -561,6 +561,8 @@ void omapdss_hdmi_display_set_timing(struct omap_dss_device *dssdev,
        struct hdmi_cm cm;
        const struct hdmi_config *t;
 
+       mutex_lock(&hdmi.lock);
+
        cm = hdmi_get_code(timings);
        hdmi.ip_data.cfg.cm = cm;
 
@@ -579,6 +581,8 @@ void omapdss_hdmi_display_set_timing(struct omap_dss_device *dssdev,
        } else {
                dss_mgr_set_timings(dssdev->manager, &t->timings);
        }
+
+       mutex_unlock(&hdmi.lock);
 }
 
 static void hdmi_dump_regs(struct seq_file *s)