1f64ae7c5a
According to the DP specification the disparity of the first symbol should always be negative. It is therefore safe to assume that panels will conform to that and therefore parameterizing this field should never be necessary. Signed-off-by: Thierry Reding <treding@nvidia.com>
1467 lines
36 KiB
C
1467 lines
36 KiB
C
/*
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* Copyright (C) 2013 NVIDIA Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/clk.h>
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#include <linux/debugfs.h>
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#include <linux/io.h>
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#include <linux/platform_device.h>
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#include <linux/reset.h>
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#include <linux/tegra-powergate.h>
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#include <drm/drm_dp_helper.h>
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#include "dc.h"
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#include "drm.h"
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#include "sor.h"
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struct tegra_sor {
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struct host1x_client client;
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struct tegra_output output;
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struct device *dev;
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void __iomem *regs;
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struct reset_control *rst;
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struct clk *clk_parent;
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struct clk *clk_safe;
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struct clk *clk_dp;
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struct clk *clk;
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struct tegra_dpaux *dpaux;
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struct mutex lock;
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bool enabled;
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struct dentry *debugfs;
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};
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struct tegra_sor_config {
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u32 bits_per_pixel;
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u32 active_polarity;
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u32 active_count;
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u32 tu_size;
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u32 active_frac;
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u32 watermark;
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u32 hblank_symbols;
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u32 vblank_symbols;
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};
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static inline struct tegra_sor *
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host1x_client_to_sor(struct host1x_client *client)
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{
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return container_of(client, struct tegra_sor, client);
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}
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static inline struct tegra_sor *to_sor(struct tegra_output *output)
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{
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return container_of(output, struct tegra_sor, output);
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}
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static inline unsigned long tegra_sor_readl(struct tegra_sor *sor,
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unsigned long offset)
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{
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return readl(sor->regs + (offset << 2));
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}
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static inline void tegra_sor_writel(struct tegra_sor *sor, unsigned long value,
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unsigned long offset)
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{
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writel(value, sor->regs + (offset << 2));
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}
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static int tegra_sor_dp_train_fast(struct tegra_sor *sor,
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struct drm_dp_link *link)
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{
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unsigned long value;
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unsigned int i;
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u8 pattern;
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int err;
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/* setup lane parameters */
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value = SOR_LANE_DRIVE_CURRENT_LANE3(0x40) |
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SOR_LANE_DRIVE_CURRENT_LANE2(0x40) |
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SOR_LANE_DRIVE_CURRENT_LANE1(0x40) |
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SOR_LANE_DRIVE_CURRENT_LANE0(0x40);
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tegra_sor_writel(sor, value, SOR_LANE_DRIVE_CURRENT_0);
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value = SOR_LANE_PREEMPHASIS_LANE3(0x0f) |
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SOR_LANE_PREEMPHASIS_LANE2(0x0f) |
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SOR_LANE_PREEMPHASIS_LANE1(0x0f) |
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SOR_LANE_PREEMPHASIS_LANE0(0x0f);
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tegra_sor_writel(sor, value, SOR_LANE_PREEMPHASIS_0);
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value = SOR_LANE_POST_CURSOR_LANE3(0x00) |
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SOR_LANE_POST_CURSOR_LANE2(0x00) |
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SOR_LANE_POST_CURSOR_LANE1(0x00) |
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SOR_LANE_POST_CURSOR_LANE0(0x00);
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tegra_sor_writel(sor, value, SOR_LANE_POST_CURSOR_0);
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/* disable LVDS mode */
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tegra_sor_writel(sor, 0, SOR_LVDS);
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value = tegra_sor_readl(sor, SOR_DP_PADCTL_0);
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value |= SOR_DP_PADCTL_TX_PU_ENABLE;
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value &= ~SOR_DP_PADCTL_TX_PU_MASK;
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value |= SOR_DP_PADCTL_TX_PU(2); /* XXX: don't hardcode? */
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tegra_sor_writel(sor, value, SOR_DP_PADCTL_0);
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value = tegra_sor_readl(sor, SOR_DP_PADCTL_0);
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value |= SOR_DP_PADCTL_CM_TXD_3 | SOR_DP_PADCTL_CM_TXD_2 |
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SOR_DP_PADCTL_CM_TXD_1 | SOR_DP_PADCTL_CM_TXD_0;
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tegra_sor_writel(sor, value, SOR_DP_PADCTL_0);
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usleep_range(10, 100);
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value = tegra_sor_readl(sor, SOR_DP_PADCTL_0);
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value &= ~(SOR_DP_PADCTL_CM_TXD_3 | SOR_DP_PADCTL_CM_TXD_2 |
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SOR_DP_PADCTL_CM_TXD_1 | SOR_DP_PADCTL_CM_TXD_0);
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tegra_sor_writel(sor, value, SOR_DP_PADCTL_0);
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err = tegra_dpaux_prepare(sor->dpaux, DP_SET_ANSI_8B10B);
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if (err < 0)
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return err;
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for (i = 0, value = 0; i < link->num_lanes; i++) {
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unsigned long lane = SOR_DP_TPG_CHANNEL_CODING |
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SOR_DP_TPG_SCRAMBLER_NONE |
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SOR_DP_TPG_PATTERN_TRAIN1;
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value = (value << 8) | lane;
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}
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tegra_sor_writel(sor, value, SOR_DP_TPG);
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pattern = DP_TRAINING_PATTERN_1;
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err = tegra_dpaux_train(sor->dpaux, link, pattern);
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if (err < 0)
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return err;
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value = tegra_sor_readl(sor, SOR_DP_SPARE_0);
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value |= SOR_DP_SPARE_SEQ_ENABLE;
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value &= ~SOR_DP_SPARE_PANEL_INTERNAL;
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value |= SOR_DP_SPARE_MACRO_SOR_CLK;
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tegra_sor_writel(sor, value, SOR_DP_SPARE_0);
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for (i = 0, value = 0; i < link->num_lanes; i++) {
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unsigned long lane = SOR_DP_TPG_CHANNEL_CODING |
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SOR_DP_TPG_SCRAMBLER_NONE |
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SOR_DP_TPG_PATTERN_TRAIN2;
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value = (value << 8) | lane;
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}
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tegra_sor_writel(sor, value, SOR_DP_TPG);
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pattern = DP_LINK_SCRAMBLING_DISABLE | DP_TRAINING_PATTERN_2;
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err = tegra_dpaux_train(sor->dpaux, link, pattern);
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if (err < 0)
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return err;
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for (i = 0, value = 0; i < link->num_lanes; i++) {
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unsigned long lane = SOR_DP_TPG_CHANNEL_CODING |
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SOR_DP_TPG_SCRAMBLER_GALIOS |
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SOR_DP_TPG_PATTERN_NONE;
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value = (value << 8) | lane;
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}
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tegra_sor_writel(sor, value, SOR_DP_TPG);
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pattern = DP_TRAINING_PATTERN_DISABLE;
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err = tegra_dpaux_train(sor->dpaux, link, pattern);
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if (err < 0)
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return err;
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return 0;
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}
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static void tegra_sor_super_update(struct tegra_sor *sor)
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{
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tegra_sor_writel(sor, 0, SOR_SUPER_STATE_0);
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tegra_sor_writel(sor, 1, SOR_SUPER_STATE_0);
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tegra_sor_writel(sor, 0, SOR_SUPER_STATE_0);
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}
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static void tegra_sor_update(struct tegra_sor *sor)
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{
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tegra_sor_writel(sor, 0, SOR_STATE_0);
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tegra_sor_writel(sor, 1, SOR_STATE_0);
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tegra_sor_writel(sor, 0, SOR_STATE_0);
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}
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static int tegra_sor_setup_pwm(struct tegra_sor *sor, unsigned long timeout)
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{
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unsigned long value;
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value = tegra_sor_readl(sor, SOR_PWM_DIV);
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value &= ~SOR_PWM_DIV_MASK;
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value |= 0x400; /* period */
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tegra_sor_writel(sor, value, SOR_PWM_DIV);
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value = tegra_sor_readl(sor, SOR_PWM_CTL);
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value &= ~SOR_PWM_CTL_DUTY_CYCLE_MASK;
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value |= 0x400; /* duty cycle */
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value &= ~SOR_PWM_CTL_CLK_SEL; /* clock source: PCLK */
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value |= SOR_PWM_CTL_TRIGGER;
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tegra_sor_writel(sor, value, SOR_PWM_CTL);
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timeout = jiffies + msecs_to_jiffies(timeout);
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while (time_before(jiffies, timeout)) {
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value = tegra_sor_readl(sor, SOR_PWM_CTL);
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if ((value & SOR_PWM_CTL_TRIGGER) == 0)
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return 0;
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usleep_range(25, 100);
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}
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return -ETIMEDOUT;
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}
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static int tegra_sor_attach(struct tegra_sor *sor)
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{
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unsigned long value, timeout;
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/* wake up in normal mode */
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value = tegra_sor_readl(sor, SOR_SUPER_STATE_1);
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value |= SOR_SUPER_STATE_HEAD_MODE_AWAKE;
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value |= SOR_SUPER_STATE_MODE_NORMAL;
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tegra_sor_writel(sor, value, SOR_SUPER_STATE_1);
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tegra_sor_super_update(sor);
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/* attach */
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value = tegra_sor_readl(sor, SOR_SUPER_STATE_1);
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value |= SOR_SUPER_STATE_ATTACHED;
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tegra_sor_writel(sor, value, SOR_SUPER_STATE_1);
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tegra_sor_super_update(sor);
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timeout = jiffies + msecs_to_jiffies(250);
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while (time_before(jiffies, timeout)) {
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value = tegra_sor_readl(sor, SOR_TEST);
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if ((value & SOR_TEST_ATTACHED) != 0)
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return 0;
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usleep_range(25, 100);
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}
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return -ETIMEDOUT;
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}
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static int tegra_sor_wakeup(struct tegra_sor *sor)
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{
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struct tegra_dc *dc = to_tegra_dc(sor->output.encoder.crtc);
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unsigned long value, timeout;
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/* enable display controller outputs */
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value = tegra_dc_readl(dc, DC_CMD_DISPLAY_POWER_CONTROL);
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value |= PW0_ENABLE | PW1_ENABLE | PW2_ENABLE | PW3_ENABLE |
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PW4_ENABLE | PM0_ENABLE | PM1_ENABLE;
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tegra_dc_writel(dc, value, DC_CMD_DISPLAY_POWER_CONTROL);
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tegra_dc_writel(dc, GENERAL_ACT_REQ << 8, DC_CMD_STATE_CONTROL);
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tegra_dc_writel(dc, GENERAL_ACT_REQ, DC_CMD_STATE_CONTROL);
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timeout = jiffies + msecs_to_jiffies(250);
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/* wait for head to wake up */
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while (time_before(jiffies, timeout)) {
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value = tegra_sor_readl(sor, SOR_TEST);
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value &= SOR_TEST_HEAD_MODE_MASK;
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if (value == SOR_TEST_HEAD_MODE_AWAKE)
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return 0;
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usleep_range(25, 100);
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}
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return -ETIMEDOUT;
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}
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static int tegra_sor_power_up(struct tegra_sor *sor, unsigned long timeout)
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{
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unsigned long value;
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value = tegra_sor_readl(sor, SOR_PWR);
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value |= SOR_PWR_TRIGGER | SOR_PWR_NORMAL_STATE_PU;
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tegra_sor_writel(sor, value, SOR_PWR);
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timeout = jiffies + msecs_to_jiffies(timeout);
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while (time_before(jiffies, timeout)) {
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value = tegra_sor_readl(sor, SOR_PWR);
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if ((value & SOR_PWR_TRIGGER) == 0)
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return 0;
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usleep_range(25, 100);
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}
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return -ETIMEDOUT;
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}
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struct tegra_sor_params {
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/* number of link clocks per line */
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unsigned int num_clocks;
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/* ratio between input and output */
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u64 ratio;
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/* precision factor */
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u64 precision;
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unsigned int active_polarity;
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unsigned int active_count;
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unsigned int active_frac;
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unsigned int tu_size;
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unsigned int error;
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};
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static int tegra_sor_compute_params(struct tegra_sor *sor,
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struct tegra_sor_params *params,
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unsigned int tu_size)
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{
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u64 active_sym, active_count, frac, approx;
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u32 active_polarity, active_frac = 0;
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const u64 f = params->precision;
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s64 error;
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active_sym = params->ratio * tu_size;
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active_count = div_u64(active_sym, f) * f;
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frac = active_sym - active_count;
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/* fraction < 0.5 */
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if (frac >= (f / 2)) {
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active_polarity = 1;
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frac = f - frac;
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} else {
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active_polarity = 0;
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}
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if (frac != 0) {
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frac = div_u64(f * f, frac); /* 1/fraction */
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if (frac <= (15 * f)) {
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active_frac = div_u64(frac, f);
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/* round up */
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if (active_polarity)
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active_frac++;
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} else {
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active_frac = active_polarity ? 1 : 15;
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}
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}
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if (active_frac == 1)
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active_polarity = 0;
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if (active_polarity == 1) {
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if (active_frac) {
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approx = active_count + (active_frac * (f - 1)) * f;
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approx = div_u64(approx, active_frac * f);
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} else {
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approx = active_count + f;
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}
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} else {
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if (active_frac)
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approx = active_count + div_u64(f, active_frac);
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else
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approx = active_count;
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}
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error = div_s64(active_sym - approx, tu_size);
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error *= params->num_clocks;
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if (error <= 0 && abs64(error) < params->error) {
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params->active_count = div_u64(active_count, f);
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params->active_polarity = active_polarity;
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params->active_frac = active_frac;
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params->error = abs64(error);
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params->tu_size = tu_size;
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if (error == 0)
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return true;
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}
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return false;
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}
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static int tegra_sor_calc_config(struct tegra_sor *sor,
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struct drm_display_mode *mode,
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struct tegra_sor_config *config,
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struct drm_dp_link *link)
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{
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const u64 f = 100000, link_rate = link->rate * 1000;
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const u64 pclk = mode->clock * 1000;
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u64 input, output, watermark, num;
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struct tegra_sor_params params;
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u32 num_syms_per_line;
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unsigned int i;
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if (!link_rate || !link->num_lanes || !pclk || !config->bits_per_pixel)
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return -EINVAL;
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output = link_rate * 8 * link->num_lanes;
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input = pclk * config->bits_per_pixel;
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if (input >= output)
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return -ERANGE;
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memset(¶ms, 0, sizeof(params));
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params.ratio = div64_u64(input * f, output);
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params.num_clocks = div_u64(link_rate * mode->hdisplay, pclk);
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params.precision = f;
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params.error = 64 * f;
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params.tu_size = 64;
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for (i = params.tu_size; i >= 32; i--)
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if (tegra_sor_compute_params(sor, ¶ms, i))
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break;
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if (params.active_frac == 0) {
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config->active_polarity = 0;
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config->active_count = params.active_count;
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if (!params.active_polarity)
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config->active_count--;
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config->tu_size = params.tu_size;
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config->active_frac = 1;
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} else {
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config->active_polarity = params.active_polarity;
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config->active_count = params.active_count;
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config->active_frac = params.active_frac;
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config->tu_size = params.tu_size;
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}
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dev_dbg(sor->dev,
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"polarity: %d active count: %d tu size: %d active frac: %d\n",
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config->active_polarity, config->active_count,
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config->tu_size, config->active_frac);
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watermark = params.ratio * config->tu_size * (f - params.ratio);
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watermark = div_u64(watermark, f);
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watermark = div_u64(watermark + params.error, f);
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config->watermark = watermark + (config->bits_per_pixel / 8) + 2;
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num_syms_per_line = (mode->hdisplay * config->bits_per_pixel) *
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(link->num_lanes * 8);
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if (config->watermark > 30) {
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config->watermark = 30;
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dev_err(sor->dev,
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"unable to compute TU size, forcing watermark to %u\n",
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config->watermark);
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} else if (config->watermark > num_syms_per_line) {
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config->watermark = num_syms_per_line;
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dev_err(sor->dev, "watermark too high, forcing to %u\n",
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config->watermark);
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}
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/* compute the number of symbols per horizontal blanking interval */
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num = ((mode->htotal - mode->hdisplay) - 7) * link_rate;
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config->hblank_symbols = div_u64(num, pclk);
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if (link->capabilities & DP_LINK_CAP_ENHANCED_FRAMING)
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config->hblank_symbols -= 3;
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config->hblank_symbols -= 12 / link->num_lanes;
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/* compute the number of symbols per vertical blanking interval */
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num = (mode->hdisplay - 25) * link_rate;
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config->vblank_symbols = div_u64(num, pclk);
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config->vblank_symbols -= 36 / link->num_lanes + 4;
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dev_dbg(sor->dev, "blank symbols: H:%u V:%u\n", config->hblank_symbols,
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config->vblank_symbols);
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return 0;
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}
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|
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static int tegra_output_sor_enable(struct tegra_output *output)
|
|
{
|
|
struct tegra_dc *dc = to_tegra_dc(output->encoder.crtc);
|
|
struct drm_display_mode *mode = &dc->base.mode;
|
|
unsigned int vbe, vse, hbe, hse, vbs, hbs, i;
|
|
struct tegra_sor *sor = to_sor(output);
|
|
struct tegra_sor_config config;
|
|
struct drm_dp_link link;
|
|
struct drm_dp_aux *aux;
|
|
unsigned long value;
|
|
int err = 0;
|
|
|
|
mutex_lock(&sor->lock);
|
|
|
|
if (sor->enabled)
|
|
goto unlock;
|
|
|
|
err = clk_prepare_enable(sor->clk);
|
|
if (err < 0)
|
|
goto unlock;
|
|
|
|
reset_control_deassert(sor->rst);
|
|
|
|
/* FIXME: properly convert to struct drm_dp_aux */
|
|
aux = (struct drm_dp_aux *)sor->dpaux;
|
|
|
|
if (sor->dpaux) {
|
|
err = tegra_dpaux_enable(sor->dpaux);
|
|
if (err < 0)
|
|
dev_err(sor->dev, "failed to enable DP: %d\n", err);
|
|
|
|
err = drm_dp_link_probe(aux, &link);
|
|
if (err < 0) {
|
|
dev_err(sor->dev, "failed to probe eDP link: %d\n",
|
|
err);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
err = clk_set_parent(sor->clk, sor->clk_safe);
|
|
if (err < 0)
|
|
dev_err(sor->dev, "failed to set safe parent clock: %d\n", err);
|
|
|
|
memset(&config, 0, sizeof(config));
|
|
config.bits_per_pixel = 24; /* XXX: don't hardcode? */
|
|
|
|
err = tegra_sor_calc_config(sor, mode, &config, &link);
|
|
if (err < 0)
|
|
dev_err(sor->dev, "failed to compute link configuration: %d\n",
|
|
err);
|
|
|
|
value = tegra_sor_readl(sor, SOR_CLK_CNTRL);
|
|
value &= ~SOR_CLK_CNTRL_DP_CLK_SEL_MASK;
|
|
value |= SOR_CLK_CNTRL_DP_CLK_SEL_SINGLE_DPCLK;
|
|
tegra_sor_writel(sor, value, SOR_CLK_CNTRL);
|
|
|
|
value = tegra_sor_readl(sor, SOR_PLL_2);
|
|
value &= ~SOR_PLL_2_BANDGAP_POWERDOWN;
|
|
tegra_sor_writel(sor, value, SOR_PLL_2);
|
|
usleep_range(20, 100);
|
|
|
|
value = tegra_sor_readl(sor, SOR_PLL_3);
|
|
value |= SOR_PLL_3_PLL_VDD_MODE_V3_3;
|
|
tegra_sor_writel(sor, value, SOR_PLL_3);
|
|
|
|
value = SOR_PLL_0_ICHPMP(0xf) | SOR_PLL_0_VCOCAP_RST |
|
|
SOR_PLL_0_PLLREG_LEVEL_V45 | SOR_PLL_0_RESISTOR_EXT;
|
|
tegra_sor_writel(sor, value, SOR_PLL_0);
|
|
|
|
value = tegra_sor_readl(sor, SOR_PLL_2);
|
|
value |= SOR_PLL_2_SEQ_PLLCAPPD;
|
|
value &= ~SOR_PLL_2_SEQ_PLLCAPPD_ENFORCE;
|
|
value |= SOR_PLL_2_LVDS_ENABLE;
|
|
tegra_sor_writel(sor, value, SOR_PLL_2);
|
|
|
|
value = SOR_PLL_1_TERM_COMPOUT | SOR_PLL_1_TMDS_TERM;
|
|
tegra_sor_writel(sor, value, SOR_PLL_1);
|
|
|
|
while (true) {
|
|
value = tegra_sor_readl(sor, SOR_PLL_2);
|
|
if ((value & SOR_PLL_2_SEQ_PLLCAPPD_ENFORCE) == 0)
|
|
break;
|
|
|
|
usleep_range(250, 1000);
|
|
}
|
|
|
|
value = tegra_sor_readl(sor, SOR_PLL_2);
|
|
value &= ~SOR_PLL_2_POWERDOWN_OVERRIDE;
|
|
value &= ~SOR_PLL_2_PORT_POWERDOWN;
|
|
tegra_sor_writel(sor, value, SOR_PLL_2);
|
|
|
|
/*
|
|
* power up
|
|
*/
|
|
|
|
/* set safe link bandwidth (1.62 Gbps) */
|
|
value = tegra_sor_readl(sor, SOR_CLK_CNTRL);
|
|
value &= ~SOR_CLK_CNTRL_DP_LINK_SPEED_MASK;
|
|
value |= SOR_CLK_CNTRL_DP_LINK_SPEED_G1_62;
|
|
tegra_sor_writel(sor, value, SOR_CLK_CNTRL);
|
|
|
|
/* step 1 */
|
|
value = tegra_sor_readl(sor, SOR_PLL_2);
|
|
value |= SOR_PLL_2_SEQ_PLLCAPPD_ENFORCE | SOR_PLL_2_PORT_POWERDOWN |
|
|
SOR_PLL_2_BANDGAP_POWERDOWN;
|
|
tegra_sor_writel(sor, value, SOR_PLL_2);
|
|
|
|
value = tegra_sor_readl(sor, SOR_PLL_0);
|
|
value |= SOR_PLL_0_VCOPD | SOR_PLL_0_POWER_OFF;
|
|
tegra_sor_writel(sor, value, SOR_PLL_0);
|
|
|
|
value = tegra_sor_readl(sor, SOR_DP_PADCTL_0);
|
|
value &= ~SOR_DP_PADCTL_PAD_CAL_PD;
|
|
tegra_sor_writel(sor, value, SOR_DP_PADCTL_0);
|
|
|
|
/* step 2 */
|
|
err = tegra_io_rail_power_on(TEGRA_IO_RAIL_LVDS);
|
|
if (err < 0) {
|
|
dev_err(sor->dev, "failed to power on I/O rail: %d\n", err);
|
|
goto unlock;
|
|
}
|
|
|
|
usleep_range(5, 100);
|
|
|
|
/* step 3 */
|
|
value = tegra_sor_readl(sor, SOR_PLL_2);
|
|
value &= ~SOR_PLL_2_BANDGAP_POWERDOWN;
|
|
tegra_sor_writel(sor, value, SOR_PLL_2);
|
|
|
|
usleep_range(20, 100);
|
|
|
|
/* step 4 */
|
|
value = tegra_sor_readl(sor, SOR_PLL_0);
|
|
value &= ~SOR_PLL_0_POWER_OFF;
|
|
value &= ~SOR_PLL_0_VCOPD;
|
|
tegra_sor_writel(sor, value, SOR_PLL_0);
|
|
|
|
value = tegra_sor_readl(sor, SOR_PLL_2);
|
|
value &= ~SOR_PLL_2_SEQ_PLLCAPPD_ENFORCE;
|
|
tegra_sor_writel(sor, value, SOR_PLL_2);
|
|
|
|
usleep_range(200, 1000);
|
|
|
|
/* step 5 */
|
|
value = tegra_sor_readl(sor, SOR_PLL_2);
|
|
value &= ~SOR_PLL_2_PORT_POWERDOWN;
|
|
tegra_sor_writel(sor, value, SOR_PLL_2);
|
|
|
|
/* switch to DP clock */
|
|
err = clk_set_parent(sor->clk, sor->clk_dp);
|
|
if (err < 0)
|
|
dev_err(sor->dev, "failed to set DP parent clock: %d\n", err);
|
|
|
|
/* power DP lanes */
|
|
value = tegra_sor_readl(sor, SOR_DP_PADCTL_0);
|
|
|
|
if (link.num_lanes <= 2)
|
|
value &= ~(SOR_DP_PADCTL_PD_TXD_3 | SOR_DP_PADCTL_PD_TXD_2);
|
|
else
|
|
value |= SOR_DP_PADCTL_PD_TXD_3 | SOR_DP_PADCTL_PD_TXD_2;
|
|
|
|
if (link.num_lanes <= 1)
|
|
value &= ~SOR_DP_PADCTL_PD_TXD_1;
|
|
else
|
|
value |= SOR_DP_PADCTL_PD_TXD_1;
|
|
|
|
if (link.num_lanes == 0)
|
|
value &= ~SOR_DP_PADCTL_PD_TXD_0;
|
|
else
|
|
value |= SOR_DP_PADCTL_PD_TXD_0;
|
|
|
|
tegra_sor_writel(sor, value, SOR_DP_PADCTL_0);
|
|
|
|
value = tegra_sor_readl(sor, SOR_DP_LINKCTL_0);
|
|
value &= ~SOR_DP_LINKCTL_LANE_COUNT_MASK;
|
|
value |= SOR_DP_LINKCTL_LANE_COUNT(link.num_lanes);
|
|
tegra_sor_writel(sor, value, SOR_DP_LINKCTL_0);
|
|
|
|
/* start lane sequencer */
|
|
value = SOR_LANE_SEQ_CTL_TRIGGER | SOR_LANE_SEQ_CTL_SEQUENCE_DOWN |
|
|
SOR_LANE_SEQ_CTL_POWER_STATE_UP;
|
|
tegra_sor_writel(sor, value, SOR_LANE_SEQ_CTL);
|
|
|
|
while (true) {
|
|
value = tegra_sor_readl(sor, SOR_LANE_SEQ_CTL);
|
|
if ((value & SOR_LANE_SEQ_CTL_TRIGGER) == 0)
|
|
break;
|
|
|
|
usleep_range(250, 1000);
|
|
}
|
|
|
|
/* set link bandwidth */
|
|
value = tegra_sor_readl(sor, SOR_CLK_CNTRL);
|
|
value &= ~SOR_CLK_CNTRL_DP_LINK_SPEED_MASK;
|
|
value |= drm_dp_link_rate_to_bw_code(link.rate) << 2;
|
|
tegra_sor_writel(sor, value, SOR_CLK_CNTRL);
|
|
|
|
/* set linkctl */
|
|
value = tegra_sor_readl(sor, SOR_DP_LINKCTL_0);
|
|
value |= SOR_DP_LINKCTL_ENABLE;
|
|
|
|
value &= ~SOR_DP_LINKCTL_TU_SIZE_MASK;
|
|
value |= SOR_DP_LINKCTL_TU_SIZE(config.tu_size);
|
|
|
|
value |= SOR_DP_LINKCTL_ENHANCED_FRAME;
|
|
tegra_sor_writel(sor, value, SOR_DP_LINKCTL_0);
|
|
|
|
for (i = 0, value = 0; i < 4; i++) {
|
|
unsigned long lane = SOR_DP_TPG_CHANNEL_CODING |
|
|
SOR_DP_TPG_SCRAMBLER_GALIOS |
|
|
SOR_DP_TPG_PATTERN_NONE;
|
|
value = (value << 8) | lane;
|
|
}
|
|
|
|
tegra_sor_writel(sor, value, SOR_DP_TPG);
|
|
|
|
value = tegra_sor_readl(sor, SOR_DP_CONFIG_0);
|
|
value &= ~SOR_DP_CONFIG_WATERMARK_MASK;
|
|
value |= SOR_DP_CONFIG_WATERMARK(config.watermark);
|
|
|
|
value &= ~SOR_DP_CONFIG_ACTIVE_SYM_COUNT_MASK;
|
|
value |= SOR_DP_CONFIG_ACTIVE_SYM_COUNT(config.active_count);
|
|
|
|
value &= ~SOR_DP_CONFIG_ACTIVE_SYM_FRAC_MASK;
|
|
value |= SOR_DP_CONFIG_ACTIVE_SYM_FRAC(config.active_frac);
|
|
|
|
if (config.active_polarity)
|
|
value |= SOR_DP_CONFIG_ACTIVE_SYM_POLARITY;
|
|
else
|
|
value &= ~SOR_DP_CONFIG_ACTIVE_SYM_POLARITY;
|
|
|
|
value |= SOR_DP_CONFIG_ACTIVE_SYM_ENABLE;
|
|
value |= SOR_DP_CONFIG_DISPARITY_NEGATIVE;
|
|
tegra_sor_writel(sor, value, SOR_DP_CONFIG_0);
|
|
|
|
value = tegra_sor_readl(sor, SOR_DP_AUDIO_HBLANK_SYMBOLS);
|
|
value &= ~SOR_DP_AUDIO_HBLANK_SYMBOLS_MASK;
|
|
value |= config.hblank_symbols & 0xffff;
|
|
tegra_sor_writel(sor, value, SOR_DP_AUDIO_HBLANK_SYMBOLS);
|
|
|
|
value = tegra_sor_readl(sor, SOR_DP_AUDIO_VBLANK_SYMBOLS);
|
|
value &= ~SOR_DP_AUDIO_VBLANK_SYMBOLS_MASK;
|
|
value |= config.vblank_symbols & 0xffff;
|
|
tegra_sor_writel(sor, value, SOR_DP_AUDIO_VBLANK_SYMBOLS);
|
|
|
|
/* enable pad calibration logic */
|
|
value = tegra_sor_readl(sor, SOR_DP_PADCTL_0);
|
|
value |= SOR_DP_PADCTL_PAD_CAL_PD;
|
|
tegra_sor_writel(sor, value, SOR_DP_PADCTL_0);
|
|
|
|
if (sor->dpaux) {
|
|
u8 rate, lanes;
|
|
|
|
err = drm_dp_link_probe(aux, &link);
|
|
if (err < 0) {
|
|
dev_err(sor->dev, "failed to probe eDP link: %d\n",
|
|
err);
|
|
goto unlock;
|
|
}
|
|
|
|
err = drm_dp_link_power_up(aux, &link);
|
|
if (err < 0) {
|
|
dev_err(sor->dev, "failed to power up eDP link: %d\n",
|
|
err);
|
|
goto unlock;
|
|
}
|
|
|
|
err = drm_dp_link_configure(aux, &link);
|
|
if (err < 0) {
|
|
dev_err(sor->dev, "failed to configure eDP link: %d\n",
|
|
err);
|
|
goto unlock;
|
|
}
|
|
|
|
rate = drm_dp_link_rate_to_bw_code(link.rate);
|
|
lanes = link.num_lanes;
|
|
|
|
value = tegra_sor_readl(sor, SOR_CLK_CNTRL);
|
|
value &= ~SOR_CLK_CNTRL_DP_LINK_SPEED_MASK;
|
|
value |= SOR_CLK_CNTRL_DP_LINK_SPEED(rate);
|
|
tegra_sor_writel(sor, value, SOR_CLK_CNTRL);
|
|
|
|
value = tegra_sor_readl(sor, SOR_DP_LINKCTL_0);
|
|
value &= ~SOR_DP_LINKCTL_LANE_COUNT_MASK;
|
|
value |= SOR_DP_LINKCTL_LANE_COUNT(lanes);
|
|
|
|
if (link.capabilities & DP_LINK_CAP_ENHANCED_FRAMING)
|
|
value |= SOR_DP_LINKCTL_ENHANCED_FRAME;
|
|
|
|
tegra_sor_writel(sor, value, SOR_DP_LINKCTL_0);
|
|
|
|
/* disable training pattern generator */
|
|
|
|
for (i = 0; i < link.num_lanes; i++) {
|
|
unsigned long lane = SOR_DP_TPG_CHANNEL_CODING |
|
|
SOR_DP_TPG_SCRAMBLER_GALIOS |
|
|
SOR_DP_TPG_PATTERN_NONE;
|
|
value = (value << 8) | lane;
|
|
}
|
|
|
|
tegra_sor_writel(sor, value, SOR_DP_TPG);
|
|
|
|
err = tegra_sor_dp_train_fast(sor, &link);
|
|
if (err < 0) {
|
|
dev_err(sor->dev, "DP fast link training failed: %d\n",
|
|
err);
|
|
goto unlock;
|
|
}
|
|
|
|
dev_dbg(sor->dev, "fast link training succeeded\n");
|
|
}
|
|
|
|
err = tegra_sor_power_up(sor, 250);
|
|
if (err < 0) {
|
|
dev_err(sor->dev, "failed to power up SOR: %d\n", err);
|
|
goto unlock;
|
|
}
|
|
|
|
/* start display controller in continuous mode */
|
|
value = tegra_dc_readl(dc, DC_CMD_STATE_ACCESS);
|
|
value |= WRITE_MUX;
|
|
tegra_dc_writel(dc, value, DC_CMD_STATE_ACCESS);
|
|
|
|
tegra_dc_writel(dc, VSYNC_H_POSITION(1), DC_DISP_DISP_TIMING_OPTIONS);
|
|
tegra_dc_writel(dc, DISP_CTRL_MODE_C_DISPLAY, DC_CMD_DISPLAY_COMMAND);
|
|
|
|
value = tegra_dc_readl(dc, DC_CMD_STATE_ACCESS);
|
|
value &= ~WRITE_MUX;
|
|
tegra_dc_writel(dc, value, DC_CMD_STATE_ACCESS);
|
|
|
|
/*
|
|
* configure panel (24bpp, vsync-, hsync-, DP-A protocol, complete
|
|
* raster, associate with display controller)
|
|
*/
|
|
value = SOR_STATE_ASY_VSYNCPOL |
|
|
SOR_STATE_ASY_HSYNCPOL |
|
|
SOR_STATE_ASY_PROTOCOL_DP_A |
|
|
SOR_STATE_ASY_CRC_MODE_COMPLETE |
|
|
SOR_STATE_ASY_OWNER(dc->pipe + 1);
|
|
|
|
switch (config.bits_per_pixel) {
|
|
case 24:
|
|
value |= SOR_STATE_ASY_PIXELDEPTH_BPP_24_444;
|
|
break;
|
|
|
|
case 18:
|
|
value |= SOR_STATE_ASY_PIXELDEPTH_BPP_18_444;
|
|
break;
|
|
|
|
default:
|
|
BUG();
|
|
break;
|
|
}
|
|
|
|
tegra_sor_writel(sor, value, SOR_STATE_1);
|
|
|
|
/*
|
|
* TODO: The video timing programming below doesn't seem to match the
|
|
* register definitions.
|
|
*/
|
|
|
|
value = ((mode->vtotal & 0x7fff) << 16) | (mode->htotal & 0x7fff);
|
|
tegra_sor_writel(sor, value, SOR_HEAD_STATE_1(0));
|
|
|
|
vse = mode->vsync_end - mode->vsync_start - 1;
|
|
hse = mode->hsync_end - mode->hsync_start - 1;
|
|
|
|
value = ((vse & 0x7fff) << 16) | (hse & 0x7fff);
|
|
tegra_sor_writel(sor, value, SOR_HEAD_STATE_2(0));
|
|
|
|
vbe = vse + (mode->vsync_start - mode->vdisplay);
|
|
hbe = hse + (mode->hsync_start - mode->hdisplay);
|
|
|
|
value = ((vbe & 0x7fff) << 16) | (hbe & 0x7fff);
|
|
tegra_sor_writel(sor, value, SOR_HEAD_STATE_3(0));
|
|
|
|
vbs = vbe + mode->vdisplay;
|
|
hbs = hbe + mode->hdisplay;
|
|
|
|
value = ((vbs & 0x7fff) << 16) | (hbs & 0x7fff);
|
|
tegra_sor_writel(sor, value, SOR_HEAD_STATE_4(0));
|
|
|
|
/* CSTM (LVDS, link A/B, upper) */
|
|
value = SOR_CSTM_LVDS | SOR_CSTM_LINK_ACT_A | SOR_CSTM_LINK_ACT_B |
|
|
SOR_CSTM_UPPER;
|
|
tegra_sor_writel(sor, value, SOR_CSTM);
|
|
|
|
/* PWM setup */
|
|
err = tegra_sor_setup_pwm(sor, 250);
|
|
if (err < 0) {
|
|
dev_err(sor->dev, "failed to setup PWM: %d\n", err);
|
|
goto unlock;
|
|
}
|
|
|
|
value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS);
|
|
value |= SOR_ENABLE;
|
|
tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS);
|
|
|
|
tegra_sor_update(sor);
|
|
|
|
err = tegra_sor_attach(sor);
|
|
if (err < 0) {
|
|
dev_err(sor->dev, "failed to attach SOR: %d\n", err);
|
|
goto unlock;
|
|
}
|
|
|
|
err = tegra_sor_wakeup(sor);
|
|
if (err < 0) {
|
|
dev_err(sor->dev, "failed to enable DC: %d\n", err);
|
|
goto unlock;
|
|
}
|
|
|
|
sor->enabled = true;
|
|
|
|
unlock:
|
|
mutex_unlock(&sor->lock);
|
|
return err;
|
|
}
|
|
|
|
static int tegra_sor_detach(struct tegra_sor *sor)
|
|
{
|
|
unsigned long value, timeout;
|
|
|
|
/* switch to safe mode */
|
|
value = tegra_sor_readl(sor, SOR_SUPER_STATE_1);
|
|
value &= ~SOR_SUPER_STATE_MODE_NORMAL;
|
|
tegra_sor_writel(sor, value, SOR_SUPER_STATE_1);
|
|
tegra_sor_super_update(sor);
|
|
|
|
timeout = jiffies + msecs_to_jiffies(250);
|
|
|
|
while (time_before(jiffies, timeout)) {
|
|
value = tegra_sor_readl(sor, SOR_PWR);
|
|
if (value & SOR_PWR_MODE_SAFE)
|
|
break;
|
|
}
|
|
|
|
if ((value & SOR_PWR_MODE_SAFE) == 0)
|
|
return -ETIMEDOUT;
|
|
|
|
/* go to sleep */
|
|
value = tegra_sor_readl(sor, SOR_SUPER_STATE_1);
|
|
value &= ~SOR_SUPER_STATE_HEAD_MODE_MASK;
|
|
tegra_sor_writel(sor, value, SOR_SUPER_STATE_1);
|
|
tegra_sor_super_update(sor);
|
|
|
|
/* detach */
|
|
value = tegra_sor_readl(sor, SOR_SUPER_STATE_1);
|
|
value &= ~SOR_SUPER_STATE_ATTACHED;
|
|
tegra_sor_writel(sor, value, SOR_SUPER_STATE_1);
|
|
tegra_sor_super_update(sor);
|
|
|
|
timeout = jiffies + msecs_to_jiffies(250);
|
|
|
|
while (time_before(jiffies, timeout)) {
|
|
value = tegra_sor_readl(sor, SOR_TEST);
|
|
if ((value & SOR_TEST_ATTACHED) == 0)
|
|
break;
|
|
|
|
usleep_range(25, 100);
|
|
}
|
|
|
|
if ((value & SOR_TEST_ATTACHED) != 0)
|
|
return -ETIMEDOUT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_sor_power_down(struct tegra_sor *sor)
|
|
{
|
|
unsigned long value, timeout;
|
|
int err;
|
|
|
|
value = tegra_sor_readl(sor, SOR_PWR);
|
|
value &= ~SOR_PWR_NORMAL_STATE_PU;
|
|
value |= SOR_PWR_TRIGGER;
|
|
tegra_sor_writel(sor, value, SOR_PWR);
|
|
|
|
timeout = jiffies + msecs_to_jiffies(250);
|
|
|
|
while (time_before(jiffies, timeout)) {
|
|
value = tegra_sor_readl(sor, SOR_PWR);
|
|
if ((value & SOR_PWR_TRIGGER) == 0)
|
|
return 0;
|
|
|
|
usleep_range(25, 100);
|
|
}
|
|
|
|
if ((value & SOR_PWR_TRIGGER) != 0)
|
|
return -ETIMEDOUT;
|
|
|
|
err = clk_set_parent(sor->clk, sor->clk_safe);
|
|
if (err < 0)
|
|
dev_err(sor->dev, "failed to set safe parent clock: %d\n", err);
|
|
|
|
value = tegra_sor_readl(sor, SOR_DP_PADCTL_0);
|
|
value &= ~(SOR_DP_PADCTL_PD_TXD_3 | SOR_DP_PADCTL_PD_TXD_0 |
|
|
SOR_DP_PADCTL_PD_TXD_1 | SOR_DP_PADCTL_PD_TXD_2);
|
|
tegra_sor_writel(sor, value, SOR_DP_PADCTL_0);
|
|
|
|
/* stop lane sequencer */
|
|
value = SOR_LANE_SEQ_CTL_TRIGGER | SOR_LANE_SEQ_CTL_SEQUENCE_UP |
|
|
SOR_LANE_SEQ_CTL_POWER_STATE_DOWN;
|
|
tegra_sor_writel(sor, value, SOR_LANE_SEQ_CTL);
|
|
|
|
timeout = jiffies + msecs_to_jiffies(250);
|
|
|
|
while (time_before(jiffies, timeout)) {
|
|
value = tegra_sor_readl(sor, SOR_LANE_SEQ_CTL);
|
|
if ((value & SOR_LANE_SEQ_CTL_TRIGGER) == 0)
|
|
break;
|
|
|
|
usleep_range(25, 100);
|
|
}
|
|
|
|
if ((value & SOR_LANE_SEQ_CTL_TRIGGER) != 0)
|
|
return -ETIMEDOUT;
|
|
|
|
value = tegra_sor_readl(sor, SOR_PLL_2);
|
|
value |= SOR_PLL_2_PORT_POWERDOWN;
|
|
tegra_sor_writel(sor, value, SOR_PLL_2);
|
|
|
|
usleep_range(20, 100);
|
|
|
|
value = tegra_sor_readl(sor, SOR_PLL_0);
|
|
value |= SOR_PLL_0_POWER_OFF;
|
|
value |= SOR_PLL_0_VCOPD;
|
|
tegra_sor_writel(sor, value, SOR_PLL_0);
|
|
|
|
value = tegra_sor_readl(sor, SOR_PLL_2);
|
|
value |= SOR_PLL_2_SEQ_PLLCAPPD;
|
|
value |= SOR_PLL_2_SEQ_PLLCAPPD_ENFORCE;
|
|
tegra_sor_writel(sor, value, SOR_PLL_2);
|
|
|
|
usleep_range(20, 100);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_output_sor_disable(struct tegra_output *output)
|
|
{
|
|
struct tegra_dc *dc = to_tegra_dc(output->encoder.crtc);
|
|
struct tegra_sor *sor = to_sor(output);
|
|
unsigned long value;
|
|
int err = 0;
|
|
|
|
mutex_lock(&sor->lock);
|
|
|
|
if (!sor->enabled)
|
|
goto unlock;
|
|
|
|
err = tegra_sor_detach(sor);
|
|
if (err < 0) {
|
|
dev_err(sor->dev, "failed to detach SOR: %d\n", err);
|
|
goto unlock;
|
|
}
|
|
|
|
tegra_sor_writel(sor, 0, SOR_STATE_1);
|
|
tegra_sor_update(sor);
|
|
|
|
/*
|
|
* The following accesses registers of the display controller, so make
|
|
* sure it's only executed when the output is attached to one.
|
|
*/
|
|
if (dc) {
|
|
/*
|
|
* XXX: We can't do this here because it causes the SOR to go
|
|
* into an erroneous state and the output will look scrambled
|
|
* the next time it is enabled. Presumably this is because we
|
|
* should be doing this only on the next VBLANK. A possible
|
|
* solution would be to queue a "power-off" event to trigger
|
|
* this code to be run during the next VBLANK.
|
|
*/
|
|
/*
|
|
value = tegra_dc_readl(dc, DC_CMD_DISPLAY_POWER_CONTROL);
|
|
value &= ~(PW0_ENABLE | PW1_ENABLE | PW2_ENABLE | PW3_ENABLE |
|
|
PW4_ENABLE | PM0_ENABLE | PM1_ENABLE);
|
|
tegra_dc_writel(dc, value, DC_CMD_DISPLAY_POWER_CONTROL);
|
|
*/
|
|
|
|
value = tegra_dc_readl(dc, DC_CMD_DISPLAY_COMMAND);
|
|
value &= ~DISP_CTRL_MODE_MASK;
|
|
tegra_dc_writel(dc, value, DC_CMD_DISPLAY_COMMAND);
|
|
|
|
value = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS);
|
|
value &= ~SOR_ENABLE;
|
|
tegra_dc_writel(dc, value, DC_DISP_DISP_WIN_OPTIONS);
|
|
|
|
tegra_dc_writel(dc, GENERAL_ACT_REQ << 8, DC_CMD_STATE_CONTROL);
|
|
tegra_dc_writel(dc, GENERAL_ACT_REQ, DC_CMD_STATE_CONTROL);
|
|
}
|
|
|
|
err = tegra_sor_power_down(sor);
|
|
if (err < 0) {
|
|
dev_err(sor->dev, "failed to power down SOR: %d\n", err);
|
|
goto unlock;
|
|
}
|
|
|
|
if (sor->dpaux) {
|
|
err = tegra_dpaux_disable(sor->dpaux);
|
|
if (err < 0) {
|
|
dev_err(sor->dev, "failed to disable DP: %d\n", err);
|
|
goto unlock;
|
|
}
|
|
}
|
|
|
|
err = tegra_io_rail_power_off(TEGRA_IO_RAIL_LVDS);
|
|
if (err < 0) {
|
|
dev_err(sor->dev, "failed to power off I/O rail: %d\n", err);
|
|
goto unlock;
|
|
}
|
|
|
|
reset_control_assert(sor->rst);
|
|
clk_disable_unprepare(sor->clk);
|
|
|
|
sor->enabled = false;
|
|
|
|
unlock:
|
|
mutex_unlock(&sor->lock);
|
|
return err;
|
|
}
|
|
|
|
static int tegra_output_sor_setup_clock(struct tegra_output *output,
|
|
struct clk *clk, unsigned long pclk,
|
|
unsigned int *div)
|
|
{
|
|
struct tegra_sor *sor = to_sor(output);
|
|
int err;
|
|
|
|
err = clk_set_parent(clk, sor->clk_parent);
|
|
if (err < 0) {
|
|
dev_err(sor->dev, "failed to set parent clock: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
err = clk_set_rate(sor->clk_parent, pclk);
|
|
if (err < 0) {
|
|
dev_err(sor->dev, "failed to set clock rate to %lu Hz\n", pclk);
|
|
return err;
|
|
}
|
|
|
|
*div = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_output_sor_check_mode(struct tegra_output *output,
|
|
struct drm_display_mode *mode,
|
|
enum drm_mode_status *status)
|
|
{
|
|
/*
|
|
* FIXME: For now, always assume that the mode is okay.
|
|
*/
|
|
|
|
*status = MODE_OK;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static enum drm_connector_status
|
|
tegra_output_sor_detect(struct tegra_output *output)
|
|
{
|
|
struct tegra_sor *sor = to_sor(output);
|
|
|
|
if (sor->dpaux)
|
|
return tegra_dpaux_detect(sor->dpaux);
|
|
|
|
return connector_status_unknown;
|
|
}
|
|
|
|
static const struct tegra_output_ops sor_ops = {
|
|
.enable = tegra_output_sor_enable,
|
|
.disable = tegra_output_sor_disable,
|
|
.setup_clock = tegra_output_sor_setup_clock,
|
|
.check_mode = tegra_output_sor_check_mode,
|
|
.detect = tegra_output_sor_detect,
|
|
};
|
|
|
|
static int tegra_sor_crc_open(struct inode *inode, struct file *file)
|
|
{
|
|
file->private_data = inode->i_private;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_sor_crc_release(struct inode *inode, struct file *file)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_sor_crc_wait(struct tegra_sor *sor, unsigned long timeout)
|
|
{
|
|
u32 value;
|
|
|
|
timeout = jiffies + msecs_to_jiffies(timeout);
|
|
|
|
while (time_before(jiffies, timeout)) {
|
|
value = tegra_sor_readl(sor, SOR_CRC_A);
|
|
if (value & SOR_CRC_A_VALID)
|
|
return 0;
|
|
|
|
usleep_range(100, 200);
|
|
}
|
|
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
static ssize_t tegra_sor_crc_read(struct file *file, char __user *buffer,
|
|
size_t size, loff_t *ppos)
|
|
{
|
|
struct tegra_sor *sor = file->private_data;
|
|
ssize_t num, err;
|
|
char buf[10];
|
|
u32 value;
|
|
|
|
mutex_lock(&sor->lock);
|
|
|
|
if (!sor->enabled) {
|
|
err = -EAGAIN;
|
|
goto unlock;
|
|
}
|
|
|
|
value = tegra_sor_readl(sor, SOR_STATE_1);
|
|
value &= ~SOR_STATE_ASY_CRC_MODE_MASK;
|
|
tegra_sor_writel(sor, value, SOR_STATE_1);
|
|
|
|
value = tegra_sor_readl(sor, SOR_CRC_CNTRL);
|
|
value |= SOR_CRC_CNTRL_ENABLE;
|
|
tegra_sor_writel(sor, value, SOR_CRC_CNTRL);
|
|
|
|
value = tegra_sor_readl(sor, SOR_TEST);
|
|
value &= ~SOR_TEST_CRC_POST_SERIALIZE;
|
|
tegra_sor_writel(sor, value, SOR_TEST);
|
|
|
|
err = tegra_sor_crc_wait(sor, 100);
|
|
if (err < 0)
|
|
goto unlock;
|
|
|
|
tegra_sor_writel(sor, SOR_CRC_A_RESET, SOR_CRC_A);
|
|
value = tegra_sor_readl(sor, SOR_CRC_B);
|
|
|
|
num = scnprintf(buf, sizeof(buf), "%08x\n", value);
|
|
|
|
err = simple_read_from_buffer(buffer, size, ppos, buf, num);
|
|
|
|
unlock:
|
|
mutex_unlock(&sor->lock);
|
|
return err;
|
|
}
|
|
|
|
static const struct file_operations tegra_sor_crc_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = tegra_sor_crc_open,
|
|
.read = tegra_sor_crc_read,
|
|
.release = tegra_sor_crc_release,
|
|
};
|
|
|
|
static int tegra_sor_debugfs_init(struct tegra_sor *sor,
|
|
struct drm_minor *minor)
|
|
{
|
|
struct dentry *entry;
|
|
int err = 0;
|
|
|
|
sor->debugfs = debugfs_create_dir("sor", minor->debugfs_root);
|
|
if (!sor->debugfs)
|
|
return -ENOMEM;
|
|
|
|
entry = debugfs_create_file("crc", 0644, sor->debugfs, sor,
|
|
&tegra_sor_crc_fops);
|
|
if (!entry) {
|
|
dev_err(sor->dev,
|
|
"cannot create /sys/kernel/debug/dri/%s/sor/crc\n",
|
|
minor->debugfs_root->d_name.name);
|
|
err = -ENOMEM;
|
|
goto remove;
|
|
}
|
|
|
|
return err;
|
|
|
|
remove:
|
|
debugfs_remove(sor->debugfs);
|
|
sor->debugfs = NULL;
|
|
return err;
|
|
}
|
|
|
|
static int tegra_sor_debugfs_exit(struct tegra_sor *sor)
|
|
{
|
|
debugfs_remove_recursive(sor->debugfs);
|
|
sor->debugfs = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_sor_init(struct host1x_client *client)
|
|
{
|
|
struct drm_device *drm = dev_get_drvdata(client->parent);
|
|
struct tegra_sor *sor = host1x_client_to_sor(client);
|
|
int err;
|
|
|
|
if (!sor->dpaux)
|
|
return -ENODEV;
|
|
|
|
sor->output.type = TEGRA_OUTPUT_EDP;
|
|
|
|
sor->output.dev = sor->dev;
|
|
sor->output.ops = &sor_ops;
|
|
|
|
err = tegra_output_init(drm, &sor->output);
|
|
if (err < 0) {
|
|
dev_err(sor->dev, "output setup failed: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
if (IS_ENABLED(CONFIG_DEBUG_FS)) {
|
|
err = tegra_sor_debugfs_init(sor, drm->primary);
|
|
if (err < 0)
|
|
dev_err(sor->dev, "debugfs setup failed: %d\n", err);
|
|
}
|
|
|
|
if (sor->dpaux) {
|
|
err = tegra_dpaux_attach(sor->dpaux, &sor->output);
|
|
if (err < 0) {
|
|
dev_err(sor->dev, "failed to attach DP: %d\n", err);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_sor_exit(struct host1x_client *client)
|
|
{
|
|
struct tegra_sor *sor = host1x_client_to_sor(client);
|
|
int err;
|
|
|
|
err = tegra_output_disable(&sor->output);
|
|
if (err < 0) {
|
|
dev_err(sor->dev, "output failed to disable: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
if (sor->dpaux) {
|
|
err = tegra_dpaux_detach(sor->dpaux);
|
|
if (err < 0) {
|
|
dev_err(sor->dev, "failed to detach DP: %d\n", err);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
if (IS_ENABLED(CONFIG_DEBUG_FS)) {
|
|
err = tegra_sor_debugfs_exit(sor);
|
|
if (err < 0)
|
|
dev_err(sor->dev, "debugfs cleanup failed: %d\n", err);
|
|
}
|
|
|
|
err = tegra_output_exit(&sor->output);
|
|
if (err < 0) {
|
|
dev_err(sor->dev, "output cleanup failed: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct host1x_client_ops sor_client_ops = {
|
|
.init = tegra_sor_init,
|
|
.exit = tegra_sor_exit,
|
|
};
|
|
|
|
static int tegra_sor_probe(struct platform_device *pdev)
|
|
{
|
|
struct device_node *np;
|
|
struct tegra_sor *sor;
|
|
struct resource *regs;
|
|
int err;
|
|
|
|
sor = devm_kzalloc(&pdev->dev, sizeof(*sor), GFP_KERNEL);
|
|
if (!sor)
|
|
return -ENOMEM;
|
|
|
|
sor->output.dev = sor->dev = &pdev->dev;
|
|
|
|
np = of_parse_phandle(pdev->dev.of_node, "nvidia,dpaux", 0);
|
|
if (np) {
|
|
sor->dpaux = tegra_dpaux_find_by_of_node(np);
|
|
of_node_put(np);
|
|
|
|
if (!sor->dpaux)
|
|
return -EPROBE_DEFER;
|
|
}
|
|
|
|
err = tegra_output_probe(&sor->output);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
sor->regs = devm_ioremap_resource(&pdev->dev, regs);
|
|
if (IS_ERR(sor->regs))
|
|
return PTR_ERR(sor->regs);
|
|
|
|
sor->rst = devm_reset_control_get(&pdev->dev, "sor");
|
|
if (IS_ERR(sor->rst))
|
|
return PTR_ERR(sor->rst);
|
|
|
|
sor->clk = devm_clk_get(&pdev->dev, NULL);
|
|
if (IS_ERR(sor->clk))
|
|
return PTR_ERR(sor->clk);
|
|
|
|
sor->clk_parent = devm_clk_get(&pdev->dev, "parent");
|
|
if (IS_ERR(sor->clk_parent))
|
|
return PTR_ERR(sor->clk_parent);
|
|
|
|
err = clk_prepare_enable(sor->clk_parent);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
sor->clk_safe = devm_clk_get(&pdev->dev, "safe");
|
|
if (IS_ERR(sor->clk_safe))
|
|
return PTR_ERR(sor->clk_safe);
|
|
|
|
err = clk_prepare_enable(sor->clk_safe);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
sor->clk_dp = devm_clk_get(&pdev->dev, "dp");
|
|
if (IS_ERR(sor->clk_dp))
|
|
return PTR_ERR(sor->clk_dp);
|
|
|
|
err = clk_prepare_enable(sor->clk_dp);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
INIT_LIST_HEAD(&sor->client.list);
|
|
sor->client.ops = &sor_client_ops;
|
|
sor->client.dev = &pdev->dev;
|
|
|
|
mutex_init(&sor->lock);
|
|
|
|
err = host1x_client_register(&sor->client);
|
|
if (err < 0) {
|
|
dev_err(&pdev->dev, "failed to register host1x client: %d\n",
|
|
err);
|
|
return err;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, sor);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_sor_remove(struct platform_device *pdev)
|
|
{
|
|
struct tegra_sor *sor = platform_get_drvdata(pdev);
|
|
int err;
|
|
|
|
err = host1x_client_unregister(&sor->client);
|
|
if (err < 0) {
|
|
dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
|
|
err);
|
|
return err;
|
|
}
|
|
|
|
clk_disable_unprepare(sor->clk_parent);
|
|
clk_disable_unprepare(sor->clk_safe);
|
|
clk_disable_unprepare(sor->clk_dp);
|
|
clk_disable_unprepare(sor->clk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id tegra_sor_of_match[] = {
|
|
{ .compatible = "nvidia,tegra124-sor", },
|
|
{ },
|
|
};
|
|
|
|
struct platform_driver tegra_sor_driver = {
|
|
.driver = {
|
|
.name = "tegra-sor",
|
|
.of_match_table = tegra_sor_of_match,
|
|
},
|
|
.probe = tegra_sor_probe,
|
|
.remove = tegra_sor_remove,
|
|
};
|