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path: root/drivers/video/sh_mobile_hdmi.c
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Diffstat (limited to 'drivers/video/sh_mobile_hdmi.c')
-rw-r--r--drivers/video/sh_mobile_hdmi.c97
1 files changed, 59 insertions, 38 deletions
diff --git a/drivers/video/sh_mobile_hdmi.c b/drivers/video/sh_mobile_hdmi.c
index e7594e145c96..74d9f546a2e8 100644
--- a/drivers/video/sh_mobile_hdmi.c
+++ b/drivers/video/sh_mobile_hdmi.c
@@ -222,6 +222,7 @@ struct sh_hdmi {
struct delayed_work edid_work;
struct fb_var_screeninfo var;
struct fb_monspecs monspec;
+ struct notifier_block notifier;
};
static void hdmi_write(struct sh_hdmi *hdmi, u8 data, u8 reg)
@@ -738,7 +739,7 @@ static int sh_hdmi_read_edid(struct sh_hdmi *hdmi, unsigned long *hdmi_rate,
struct fb_modelist *modelist = NULL;
unsigned int f_width = 0, f_height = 0, f_refresh = 0;
unsigned long found_rate_error = ULONG_MAX; /* silly compiler... */
- bool exact_match = false;
+ bool scanning = false, preferred_bad = false;
u8 edid[128];
char *forced;
int i;
@@ -801,6 +802,9 @@ static int sh_hdmi_read_edid(struct sh_hdmi *hdmi, unsigned long *hdmi_rate,
if (i < 2) {
f_width = 0;
f_height = 0;
+ } else {
+ /* The user wants us to use the EDID data */
+ scanning = true;
}
dev_dbg(hdmi->dev, "Forced mode %ux%u@%uHz\n",
f_width, f_height, f_refresh);
@@ -808,37 +812,56 @@ static int sh_hdmi_read_edid(struct sh_hdmi *hdmi, unsigned long *hdmi_rate,
/* Walk monitor modes to find the best or the exact match */
for (i = 0, mode = hdmi->monspec.modedb;
- f_width && f_height && i < hdmi->monspec.modedb_len && !exact_match;
+ i < hdmi->monspec.modedb_len && scanning;
i++, mode++) {
unsigned long rate_error;
- /* No interest in unmatching modes */
- if (f_width != mode->xres || f_height != mode->yres)
+ if (!f_width && !f_height) {
+ /*
+ * A parameter string "video=sh_mobile_lcdc:0x0" means
+ * use the preferred EDID mode. If it is rejected by
+ * .fb_check_var(), keep looking, until an acceptable
+ * one is found.
+ */
+ if ((mode->flag & FB_MODE_IS_FIRST) || preferred_bad)
+ scanning = false;
+ else
+ continue;
+ } else if (f_width != mode->xres || f_height != mode->yres) {
+ /* No interest in unmatching modes */
continue;
+ }
rate_error = sh_hdmi_rate_error(hdmi, mode, hdmi_rate, parent_rate);
- if (f_refresh == mode->refresh || (!f_refresh && !rate_error))
- /*
- * Exact match if either the refresh rate matches or it
- * hasn't been specified and we've found a mode, for
- * which we can configure the clock precisely
- */
- exact_match = true;
- else if (found && found_rate_error <= rate_error)
- /*
- * We otherwise search for the closest matching clock
- * rate - either if no refresh rate has been specified
- * or we cannot find an exactly matching one
- */
- continue;
+ if (scanning) {
+ if (f_refresh == mode->refresh || (!f_refresh && !rate_error))
+ /*
+ * Exact match if either the refresh rate
+ * matches or it hasn't been specified and we've
+ * found a mode, for which we can configure the
+ * clock precisely
+ */
+ scanning = false;
+ else if (found && found_rate_error <= rate_error)
+ /*
+ * We otherwise search for the closest matching
+ * clock rate - either if no refresh rate has
+ * been specified or we cannot find an exactly
+ * matching one
+ */
+ continue;
+ }
/* Check if supported: sufficient fb memory, supported clock-rate */
fb_videomode_to_var(var, mode);
+ var->bits_per_pixel = info->var.bits_per_pixel;
+
if (info && info->fbops->fb_check_var &&
info->fbops->fb_check_var(var, info)) {
- exact_match = false;
+ scanning = true;
+ preferred_bad = true;
continue;
}
@@ -856,9 +879,9 @@ static int sh_hdmi_read_edid(struct sh_hdmi *hdmi, unsigned long *hdmi_rate,
* driver, and passing ->info with HDMI platform data.
*/
if (info && !found) {
- modelist = hdmi->info->modelist.next &&
- !list_empty(&hdmi->info->modelist) ?
- list_entry(hdmi->info->modelist.next,
+ modelist = info->modelist.next &&
+ !list_empty(&info->modelist) ?
+ list_entry(info->modelist.next,
struct fb_modelist, list) :
NULL;
@@ -1101,6 +1124,7 @@ static void sh_hdmi_edid_work_fn(struct work_struct *work)
mutex_lock(&hdmi->mutex);
if (hdmi->hp_state == HDMI_HOTPLUG_CONNECTED) {
+ struct fb_info *info = hdmi->info;
unsigned long parent_rate = 0, hdmi_rate;
/* A device has been plugged in */
@@ -1122,22 +1146,21 @@ static void sh_hdmi_edid_work_fn(struct work_struct *work)
/* Switched to another (d) power-save mode */
msleep(10);
- if (!hdmi->info)
+ if (!info)
goto out;
- ch = hdmi->info->par;
+ ch = info->par;
acquire_console_sem();
/* HDMI plug in */
if (!sh_hdmi_must_reconfigure(hdmi) &&
- hdmi->info->state == FBINFO_STATE_RUNNING) {
+ info->state == FBINFO_STATE_RUNNING) {
/*
* First activation with the default monitor - just turn
* on, if we run a resume here, the logo disappears
*/
- if (lock_fb_info(hdmi->info)) {
- struct fb_info *info = hdmi->info;
+ if (lock_fb_info(info)) {
info->var.width = hdmi->var.width;
info->var.height = hdmi->var.height;
sh_hdmi_display_on(hdmi, info);
@@ -1145,7 +1168,7 @@ static void sh_hdmi_edid_work_fn(struct work_struct *work)
}
} else {
/* New monitor or have to wake up */
- fb_set_suspend(hdmi->info, 0);
+ fb_set_suspend(info, 0);
}
release_console_sem();
@@ -1176,13 +1199,6 @@ out:
}
static int sh_hdmi_notify(struct notifier_block *nb,
- unsigned long action, void *data);
-
-static struct notifier_block sh_hdmi_notifier = {
- .notifier_call = sh_hdmi_notify,
-};
-
-static int sh_hdmi_notify(struct notifier_block *nb,
unsigned long action, void *data)
{
struct fb_event *event = data;
@@ -1191,7 +1207,7 @@ static int sh_hdmi_notify(struct notifier_block *nb,
struct sh_mobile_lcdc_board_cfg *board_cfg = &ch->cfg.board_cfg;
struct sh_hdmi *hdmi = board_cfg->board_data;
- if (nb != &sh_hdmi_notifier || !hdmi || hdmi->info != info)
+ if (!hdmi || nb != &hdmi->notifier || hdmi->info != info)
return NOTIFY_DONE;
switch(action) {
@@ -1210,11 +1226,11 @@ static int sh_hdmi_notify(struct notifier_block *nb,
* temporarily, synchronise with the work queue and re-acquire
* the info->lock.
*/
- unlock_fb_info(hdmi->info);
+ unlock_fb_info(info);
mutex_lock(&hdmi->mutex);
hdmi->info = NULL;
mutex_unlock(&hdmi->mutex);
- lock_fb_info(hdmi->info);
+ lock_fb_info(info);
return NOTIFY_OK;
}
return NOTIFY_DONE;
@@ -1312,6 +1328,9 @@ static int __init sh_hdmi_probe(struct platform_device *pdev)
goto ecodec;
}
+ hdmi->notifier.notifier_call = sh_hdmi_notify;
+ fb_register_client(&hdmi->notifier);
+
return 0;
ecodec:
@@ -1342,6 +1361,8 @@ static int __exit sh_hdmi_remove(struct platform_device *pdev)
snd_soc_unregister_codec(&pdev->dev);
+ fb_unregister_client(&hdmi->notifier);
+
board_cfg->display_on = NULL;
board_cfg->display_off = NULL;
board_cfg->board_data = NULL;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-16 02:15:03 +0100