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From 1b9c44163036d1c28e55d508ffe6d33492e92569 Mon Sep 17 00:00:00 2001
From: Koji Matsuoka <koji.matsuoka.xm@renesas.com>
Date: Thu, 7 Dec 2017 20:10:39 +0900
Subject: [PATCH 043/122] drm/bridge: adv7511: Add frequency and vrefresh
limitation option
This patch adds processing of frequency and vrefresh to ADV7511.
Signed-off-by: Koji Matsuoka <koji.matsuoka.xm@renesas.com>
---
drivers/gpu/drm/bridge/adv7511/adv7511.h | 7 +++++++
drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 22 ++++++++++++++++++++++
2 files changed, 29 insertions(+)
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511.h b/drivers/gpu/drm/bridge/adv7511/adv7511.h
index 73d8ccb..8a30267 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7511.h
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511.h
@@ -271,6 +271,8 @@ enum adv7511_sync_polarity {
* @sync_pulse: Select the sync pulse
* @vsync_polarity: vsync input signal configuration
* @hsync_polarity: hsync input signal configuration
+ * @limit_vrefresh_option: limit vrefresh option
+ * @limit_freq_option: limit frequency option
*/
struct adv7511_link_config {
unsigned int input_color_depth;
@@ -285,6 +287,9 @@ struct adv7511_link_config {
enum adv7511_input_sync_pulse sync_pulse;
enum adv7511_sync_polarity vsync_polarity;
enum adv7511_sync_polarity hsync_polarity;
+
+ unsigned int limit_vrefresh_option;
+ unsigned int limit_freq_option;
};
/**
@@ -354,6 +359,8 @@ struct adv7511 {
enum adv7511_sync_polarity vsync_polarity;
enum adv7511_sync_polarity hsync_polarity;
bool rgb;
+ unsigned int limit_vref;
+ unsigned int limit_freq;
struct gpio_desc *gpio_pd;
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
index 808021f..470be69 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
@@ -323,6 +323,8 @@ static void adv7511_set_link_config(struct adv7511 *adv7511,
adv7511->hsync_polarity = config->hsync_polarity;
adv7511->vsync_polarity = config->vsync_polarity;
adv7511->rgb = config->input_colorspace == HDMI_COLORSPACE_RGB;
+ adv7511->limit_vref = config->limit_freq_option;
+ adv7511->limit_freq = config->limit_vrefresh_option;
}
static void __adv7511_power_on(struct adv7511 *adv7511)
@@ -672,6 +674,16 @@ static enum drm_mode_status adv7511_mode_valid(struct adv7511 *adv7511,
if (mode->clock > 165000)
return MODE_CLOCK_HIGH;
+ if (adv7511->limit_freq) {
+ if (mode->clock > (adv7511->limit_freq / 1000))
+ return MODE_CLOCK_HIGH;
+ }
+
+ if (adv7511->limit_vref) {
+ if (drm_mode_vrefresh(mode) < adv7511->limit_vref)
+ return MODE_BAD;
+ }
+
return MODE_OK;
}
@@ -1089,6 +1101,16 @@ static int adv7511_parse_dt(struct device_node *np,
config->vsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH;
config->hsync_polarity = ADV7511_SYNC_POLARITY_PASSTHROUGH;
+ ret = of_property_read_u32(np, "limit-frequency",
+ &config->limit_vrefresh_option);
+ if (ret < 0)
+ config->limit_vrefresh_option = 0;
+
+ ret = of_property_read_u32(np, "lower-refresh",
+ &config->limit_freq_option);
+ if (ret < 0)
+ config->limit_freq_option = 0;
+
return 0;
}
--
2.7.4
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