int tegra_dc_set_dynamic_emc(struct tegra_dc_win *windows[], int n)
{
unsigned long new_rate;
struct tegra_dc *dc;
#ifdef CONFIG_MACH_DA2
const unsigned long threshold = 204000000;
#endif
if (!use_dynamic_emc)
return 0;
dc = windows[0]->dc;
/* calculate the new rate based on this POST */
new_rate = tegra_dc_get_bandwidth(windows, n);
if (WARN_ONCE(new_rate > (ULONG_MAX / 1000), "bandwidth maxed out\n"))
new_rate = ULONG_MAX;
else
new_rate = EMC_BW_TO_FREQ(new_rate * 1000);
#ifdef CONFIG_MACH_DA2
if (new_rate < threshold) {
new_rate = threshold;
}
#endif
if (tegra_dc_has_multiple_dc())
new_rate = ULONG_MAX;
trace_printk("%s:new_emc_clk_rate=%ld\n", dc->ndev->name, new_rate);
dc->new_emc_clk_rate = new_rate;
return 0;
}
int tegra_dc_set_dynamic_emc(struct tegra_dc_win *windows[], int n)
{
unsigned long new_rate;
struct tegra_dc *dc;
if (!use_dynamic_emc)
return 0;
dc = windows[0]->dc;
/* calculate the new rate based on this POST */
new_rate = tegra_dc_get_bandwidth(windows, n);
if (WARN_ONCE(new_rate > (ULONG_MAX / 1000), "bandwidth maxed out\n"))
new_rate = ULONG_MAX;
else
new_rate = EMC_BW_TO_FREQ(new_rate * 1000);
if (tegra_dc_has_multiple_dc())
new_rate = ULONG_MAX;
dc->new_emc_clk_rate = new_rate;
trace_set_dynamic_emc(dc);
return 0;
}
static void tegra_overlay_set_emc_freq(struct tegra_overlay_info *dev)
{
unsigned long new_rate;
int i;
struct tegra_dc_win *win;
struct tegra_dc_win *wins[DC_N_WINDOWS];
for (i = 0; i < DC_N_WINDOWS; i++) {
win = tegra_dc_get_window(dev->dc, i);
wins[i] = win;
}
new_rate = tegra_dc_get_bandwidth(wins, dev->dc->n_windows);
new_rate = EMC_BW_TO_FREQ(new_rate);
if (tegra_dc_has_multiple_dc())
new_rate = ULONG_MAX;
clk_set_rate(dev->dc->emc_clk, new_rate);
}
int tegra_dc_set_dynamic_emc(struct tegra_dc_win *windows[], int n)
{
unsigned long new_rate;
struct tegra_dc *dc;
if (!use_dynamic_emc)
return 0;
dc = windows[0]->dc;
if (tegra_dc_has_multiple_dc())
new_rate = ULONG_MAX;
else
new_rate = tegra_dc_kbps_to_emc(
tegra_dc_get_bandwidth(windows, n));
dc->new_emc_clk_rate = new_rate;
trace_set_dynamic_emc(dc);
return 0;
}
int esc_mods_tegra_dc_config_possible(struct file *fp,
struct MODS_TEGRA_DC_CONFIG_POSSIBLE *args)
{
int i;
struct tegra_dc *dc = tegra_dc_get_dc(args->head);
struct tegra_dc_win *dc_wins[DC_N_WINDOWS];
#ifndef CONFIG_TEGRA_ISOMGR
struct clk *emc_clk = 0;
unsigned long max_bandwidth = 0;
unsigned long current_emc_freq = 0;
unsigned long max_available_bandwidth = 0;
#else
int ret = -EINVAL;
#endif
LOG_ENT();
BUG_ON(args->win_num > DC_N_WINDOWS);
if (!dc) {
LOG_EXT();
return -EINVAL;
}
for (i = 0; i < args->win_num; i++) {
int idx = args->windows[i].index;
if (args->windows[i].flags &
MODS_TEGRA_DC_WINDOW_FLAG_ENABLED) {
mods_tegra_dc_set_windowattr_basic(&dc->tmp_wins[idx],
&args->windows[i]);
} else {
dc->tmp_wins[idx].flags = 0;
}
dc_wins[i] = &dc->tmp_wins[idx];
mods_debug_printk(DEBUG_TEGRADC,
"esc_mods_tegra_dc_config_possible head %u, "
"using index %d for window %d\n",
args->head, i, idx);
}
mods_debug_printk(DEBUG_TEGRADC,
"esc_mods_tegra_dc_config_possible head %u, "
"dc->mode.pclk %u\n",
args->head, dc->mode.pclk);
#ifndef CONFIG_TEGRA_ISOMGR
max_bandwidth = tegra_dc_get_bandwidth(dc_wins, args->win_num);
emc_clk = clk_get_sys("tegra_emc", "emc");
if (IS_ERR(emc_clk)) {
mods_debug_printk(DEBUG_TEGRADC,
"esc_mods_tegra_dc_config_possible "
"invalid clock specified when fetching EMC clock\n");
} else {
current_emc_freq = clk_get_rate(emc_clk);
current_emc_freq /= 1000;
max_available_bandwidth =
8 * tegra_emc_freq_req_to_bw(current_emc_freq);
max_available_bandwidth = (max_available_bandwidth / 100) * 50;
}
mods_debug_printk(DEBUG_TEGRADC,
"esc_mods_tegra_dc_config_possible bandwidth needed = %lu,"
" bandwidth available = %lu\n",
max_bandwidth, max_available_bandwidth);
args->possible = (max_bandwidth <= max_available_bandwidth);
#else
ret = tegra_dc_bandwidth_negotiate_bw(dc, dc_wins, args->win_num);
args->possible = (ret == 0);
#endif
for (i = 0; i < args->win_num; i++) {
args->windows[i].bandwidth = dc_wins[i]->new_bandwidth;
mods_debug_printk(DEBUG_TEGRADC,
"esc_mods_tegra_dc_config_possible head %u, "
"window %d bandwidth %d\n",
args->head, dc_wins[i]->idx, dc_wins[i]->new_bandwidth);
}
LOG_EXT();
return 0;
}