summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--drivers/gpu/drm/vc4/vc4_hdmi.c308
1 files changed, 291 insertions, 17 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index a130b7d48e46..a826faf8b02d 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -34,6 +34,7 @@
#include <drm/display/drm_hdmi_helper.h>
#include <drm/display/drm_scdc_helper.h>
#include <drm/drm_atomic_helper.h>
+#include <drm/drm_drv.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_simple_kms_helper.h>
#include <linux/clk.h>
@@ -146,7 +147,12 @@ static int vc4_hdmi_debugfs_regs(struct seq_file *m, void *unused)
{
struct drm_info_node *node = (struct drm_info_node *)m->private;
struct vc4_hdmi *vc4_hdmi = node->info_ent->data;
+ struct drm_device *drm = vc4_hdmi->connector.dev;
struct drm_printer p = drm_seq_file_printer(m);
+ int idx;
+
+ if (!drm_dev_enter(drm, &idx))
+ return -ENODEV;
drm_print_regset32(&p, &vc4_hdmi->hdmi_regset);
drm_print_regset32(&p, &vc4_hdmi->hd_regset);
@@ -157,12 +163,23 @@ static int vc4_hdmi_debugfs_regs(struct seq_file *m, void *unused)
drm_print_regset32(&p, &vc4_hdmi->ram_regset);
drm_print_regset32(&p, &vc4_hdmi->rm_regset);
+ drm_dev_exit(idx);
+
return 0;
}
static void vc4_hdmi_reset(struct vc4_hdmi *vc4_hdmi)
{
+ struct drm_device *drm = vc4_hdmi->connector.dev;
unsigned long flags;
+ int idx;
+
+ /*
+ * We can be called by our bind callback, when the
+ * connector->dev pointer might not be initialised yet.
+ */
+ if (drm && !drm_dev_enter(drm, &idx))
+ return;
spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
@@ -179,11 +196,23 @@ static void vc4_hdmi_reset(struct vc4_hdmi *vc4_hdmi)
HDMI_WRITE(HDMI_SW_RESET_CONTROL, 0);
spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
+
+ if (drm)
+ drm_dev_exit(idx);
}
static void vc5_hdmi_reset(struct vc4_hdmi *vc4_hdmi)
{
+ struct drm_device *drm = vc4_hdmi->connector.dev;
unsigned long flags;
+ int idx;
+
+ /*
+ * We can be called by our bind callback, when the
+ * connector->dev pointer might not be initialised yet.
+ */
+ if (drm && !drm_dev_enter(drm, &idx))
+ return;
reset_control_reset(vc4_hdmi->reset);
@@ -195,15 +224,31 @@ static void vc5_hdmi_reset(struct vc4_hdmi *vc4_hdmi)
HDMI_READ(HDMI_CLOCK_STOP) | VC4_DVP_HT_CLOCK_STOP_PIXEL);
spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
+
+ if (drm)
+ drm_dev_exit(idx);
}
#ifdef CONFIG_DRM_VC4_HDMI_CEC
static void vc4_hdmi_cec_update_clk_div(struct vc4_hdmi *vc4_hdmi)
{
- unsigned long cec_rate = clk_get_rate(vc4_hdmi->cec_clock);
+ struct drm_device *drm = vc4_hdmi->connector.dev;
+ unsigned long cec_rate;
unsigned long flags;
u16 clk_cnt;
u32 value;
+ int idx;
+
+ /*
+ * This function is called by our runtime_resume implementation
+ * and thus at bind time, when we haven't registered our
+ * connector yet and thus don't have a pointer to the DRM
+ * device.
+ */
+ if (drm && !drm_dev_enter(drm, &idx))
+ return;
+
+ cec_rate = clk_get_rate(vc4_hdmi->cec_clock);
spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
@@ -219,6 +264,9 @@ static void vc4_hdmi_cec_update_clk_div(struct vc4_hdmi *vc4_hdmi)
HDMI_WRITE(HDMI_CEC_CNTRL_1, value);
spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
+
+ if (drm)
+ drm_dev_exit(idx);
}
#else
static void vc4_hdmi_cec_update_clk_div(struct vc4_hdmi *vc4_hdmi) {}
@@ -440,25 +488,34 @@ static int vc4_hdmi_stop_packet(struct drm_encoder *encoder,
bool poll)
{
struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
+ struct drm_device *drm = vc4_hdmi->connector.dev;
u32 packet_id = type - 0x80;
unsigned long flags;
+ int ret = 0;
+ int idx;
+
+ if (!drm_dev_enter(drm, &idx))
+ return -ENODEV;
spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
HDMI_WRITE(HDMI_RAM_PACKET_CONFIG,
HDMI_READ(HDMI_RAM_PACKET_CONFIG) & ~BIT(packet_id));
spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
- if (!poll)
- return 0;
+ if (poll) {
+ ret = wait_for(!(HDMI_READ(HDMI_RAM_PACKET_STATUS) &
+ BIT(packet_id)), 100);
+ }
- return wait_for(!(HDMI_READ(HDMI_RAM_PACKET_STATUS) &
- BIT(packet_id)), 100);
+ drm_dev_exit(idx);
+ return ret;
}
static void vc4_hdmi_write_infoframe(struct drm_encoder *encoder,
union hdmi_infoframe *frame)
{
struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
+ struct drm_device *drm = vc4_hdmi->connector.dev;
u32 packet_id = frame->any.type - 0x80;
const struct vc4_hdmi_register *ram_packet_start =
&vc4_hdmi->variant->registers[HDMI_RAM_PACKET_START];
@@ -471,6 +528,10 @@ static void vc4_hdmi_write_infoframe(struct drm_encoder *encoder,
unsigned long flags;
ssize_t len, i;
int ret;
+ int idx;
+
+ if (!drm_dev_enter(drm, &idx))
+ return;
WARN_ONCE(!(HDMI_READ(HDMI_RAM_PACKET_CONFIG) &
VC4_HDMI_RAM_PACKET_ENABLE),
@@ -478,12 +539,12 @@ static void vc4_hdmi_write_infoframe(struct drm_encoder *encoder,
len = hdmi_infoframe_pack(frame, buffer, sizeof(buffer));
if (len < 0)
- return;
+ goto out;
ret = vc4_hdmi_stop_packet(encoder, frame->any.type, true);
if (ret) {
DRM_ERROR("Failed to wait for infoframe to go idle: %d\n", ret);
- return;
+ goto out;
}
spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
@@ -519,6 +580,9 @@ static void vc4_hdmi_write_infoframe(struct drm_encoder *encoder,
BIT(packet_id)), 100);
if (ret)
DRM_ERROR("Failed to wait for infoframe to start: %d\n", ret);
+
+out:
+ drm_dev_exit(idx);
}
static void vc4_hdmi_avi_infoframe_colorspace(struct hdmi_avi_infoframe *frame,
@@ -668,8 +732,10 @@ static bool vc4_hdmi_supports_scrambling(struct drm_encoder *encoder,
static void vc4_hdmi_enable_scrambling(struct drm_encoder *encoder)
{
struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
+ struct drm_device *drm = vc4_hdmi->connector.dev;
struct drm_display_mode *mode = &vc4_hdmi->saved_adjusted_mode;
unsigned long flags;
+ int idx;
lockdep_assert_held(&vc4_hdmi->mutex);
@@ -681,6 +747,9 @@ static void vc4_hdmi_enable_scrambling(struct drm_encoder *encoder)
vc4_hdmi->output_format))
return;
+ if (!drm_dev_enter(drm, &idx))
+ return;
+
drm_scdc_set_high_tmds_clock_ratio(vc4_hdmi->ddc, true);
drm_scdc_set_scrambling(vc4_hdmi->ddc, true);
@@ -689,6 +758,8 @@ static void vc4_hdmi_enable_scrambling(struct drm_encoder *encoder)
VC5_HDMI_SCRAMBLER_CTL_ENABLE);
spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
+ drm_dev_exit(idx);
+
vc4_hdmi->scdc_enabled = true;
queue_delayed_work(system_wq, &vc4_hdmi->scrambling_work,
@@ -698,7 +769,9 @@ static void vc4_hdmi_enable_scrambling(struct drm_encoder *encoder)
static void vc4_hdmi_disable_scrambling(struct drm_encoder *encoder)
{
struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
+ struct drm_device *drm = vc4_hdmi->connector.dev;
unsigned long flags;
+ int idx;
lockdep_assert_held(&vc4_hdmi->mutex);
@@ -710,6 +783,9 @@ static void vc4_hdmi_disable_scrambling(struct drm_encoder *encoder)
if (delayed_work_pending(&vc4_hdmi->scrambling_work))
cancel_delayed_work_sync(&vc4_hdmi->scrambling_work);
+ if (!drm_dev_enter(drm, &idx))
+ return;
+
spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
HDMI_WRITE(HDMI_SCRAMBLER_CTL, HDMI_READ(HDMI_SCRAMBLER_CTL) &
~VC5_HDMI_SCRAMBLER_CTL_ENABLE);
@@ -717,6 +793,8 @@ static void vc4_hdmi_disable_scrambling(struct drm_encoder *encoder)
drm_scdc_set_scrambling(vc4_hdmi->ddc, false);
drm_scdc_set_high_tmds_clock_ratio(vc4_hdmi->ddc, false);
+
+ drm_dev_exit(idx);
}
static void vc4_hdmi_scrambling_wq(struct work_struct *work)
@@ -739,12 +817,17 @@ static void vc4_hdmi_encoder_post_crtc_disable(struct drm_encoder *encoder,
struct drm_atomic_state *state)
{
struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
+ struct drm_device *drm = vc4_hdmi->connector.dev;
unsigned long flags;
+ int idx;
mutex_lock(&vc4_hdmi->mutex);
vc4_hdmi->packet_ram_enabled = false;
+ if (!drm_dev_enter(drm, &idx))
+ goto out;
+
spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
HDMI_WRITE(HDMI_RAM_PACKET_CONFIG, 0);
@@ -762,6 +845,9 @@ static void vc4_hdmi_encoder_post_crtc_disable(struct drm_encoder *encoder,
vc4_hdmi_disable_scrambling(encoder);
+ drm_dev_exit(idx);
+
+out:
mutex_unlock(&vc4_hdmi->mutex);
}
@@ -769,11 +855,16 @@ static void vc4_hdmi_encoder_post_crtc_powerdown(struct drm_encoder *encoder,
struct drm_atomic_state *state)
{
struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
+ struct drm_device *drm = vc4_hdmi->connector.dev;
unsigned long flags;
int ret;
+ int idx;
mutex_lock(&vc4_hdmi->mutex);
+ if (!drm_dev_enter(drm, &idx))
+ goto out;
+
spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
HDMI_WRITE(HDMI_VID_CTL,
HDMI_READ(HDMI_VID_CTL) | VC4_HD_VID_CTL_BLANKPIX);
@@ -789,6 +880,9 @@ static void vc4_hdmi_encoder_post_crtc_powerdown(struct drm_encoder *encoder,
if (ret < 0)
DRM_ERROR("Failed to release power domain: %d\n", ret);
+ drm_dev_exit(idx);
+
+out:
mutex_unlock(&vc4_hdmi->mutex);
}
@@ -796,8 +890,13 @@ static void vc4_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi,
struct drm_connector_state *state,
const struct drm_display_mode *mode)
{
+ struct drm_device *drm = vc4_hdmi->connector.dev;
unsigned long flags;
u32 csc_ctl;
+ int idx;
+
+ if (!drm_dev_enter(drm, &idx))
+ return;
spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
@@ -832,6 +931,8 @@ static void vc4_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi,
HDMI_WRITE(HDMI_CSC_CTL, csc_ctl);
spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
+
+ drm_dev_exit(idx);
}
/*
@@ -916,6 +1017,7 @@ static void vc5_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi,
struct drm_connector_state *state,
const struct drm_display_mode *mode)
{
+ struct drm_device *drm = vc4_hdmi->connector.dev;
struct vc4_hdmi_connector_state *vc4_state =
conn_state_to_vc4_hdmi_conn_state(state);
unsigned long flags;
@@ -924,6 +1026,10 @@ static void vc5_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi,
u32 csc_chan_ctl = 0;
u32 csc_ctl = VC5_MT_CP_CSC_CTL_ENABLE | VC4_SET_FIELD(VC4_HD_CSC_CTL_MODE_CUSTOM,
VC5_MT_CP_CSC_CTL_MODE);
+ int idx;
+
+ if (!drm_dev_enter(drm, &idx))
+ return;
spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
@@ -966,12 +1072,15 @@ static void vc5_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi,
HDMI_WRITE(HDMI_CSC_CTL, csc_ctl);
spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
+
+ drm_dev_exit(idx);
}
static void vc4_hdmi_set_timings(struct vc4_hdmi *vc4_hdmi,
struct drm_connector_state *state,
struct drm_display_mode *mode)
{
+ struct drm_device *drm = vc4_hdmi->connector.dev;
bool hsync_pos = mode->flags & DRM_MODE_FLAG_PHSYNC;
bool vsync_pos = mode->flags & DRM_MODE_FLAG_PVSYNC;
bool interlaced = mode->flags & DRM_MODE_FLAG_INTERLACE;
@@ -991,6 +1100,10 @@ static void vc4_hdmi_set_timings(struct vc4_hdmi *vc4_hdmi,
VC4_HDMI_VERTB_VBP));
unsigned long flags;
u32 reg;
+ int idx;
+
+ if (!drm_dev_enter(drm, &idx))
+ return;
spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
@@ -1023,12 +1136,15 @@ static void vc4_hdmi_set_timings(struct vc4_hdmi *vc4_hdmi,
HDMI_WRITE(HDMI_MISC_CONTROL, reg);
spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
+
+ drm_dev_exit(idx);
}
static void vc5_hdmi_set_timings(struct vc4_hdmi *vc4_hdmi,
struct drm_connector_state *state,
struct drm_display_mode *mode)
{
+ struct drm_device *drm = vc4_hdmi->connector.dev;
const struct vc4_hdmi_connector_state *vc4_state =
conn_state_to_vc4_hdmi_conn_state(state);
bool hsync_pos = mode->flags & DRM_MODE_FLAG_PHSYNC;
@@ -1052,6 +1168,10 @@ static void vc5_hdmi_set_timings(struct vc4_hdmi *vc4_hdmi,
unsigned char gcp;
bool gcp_en;
u32 reg;
+ int idx;
+
+ if (!drm_dev_enter(drm, &idx))
+ return;
spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
@@ -1128,13 +1248,20 @@ static void vc5_hdmi_set_timings(struct vc4_hdmi *vc4_hdmi,
HDMI_WRITE(HDMI_CLOCK_STOP, 0);
spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
+
+ drm_dev_exit(idx);
}
static void vc4_hdmi_recenter_fifo(struct vc4_hdmi *vc4_hdmi)
{
+ struct drm_device *drm = vc4_hdmi->connector.dev;
unsigned long flags;
u32 drift;
int ret;
+ int idx;
+
+ if (!drm_dev_enter(drm, &idx))
+ return;
spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
@@ -1163,12 +1290,15 @@ static void vc4_hdmi_recenter_fifo(struct vc4_hdmi *vc4_hdmi)
VC4_HDMI_FIFO_CTL_RECENTER_DONE, 1);
WARN_ONCE(ret, "Timeout waiting for "
"VC4_HDMI_FIFO_CTL_RECENTER_DONE");
+
+ drm_dev_exit(idx);
}
static void vc4_hdmi_encoder_pre_crtc_configure(struct drm_encoder *encoder,
struct drm_atomic_state *state)
{
struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
+ struct drm_device *drm = vc4_hdmi->connector.dev;
struct drm_connector *connector = &vc4_hdmi->connector;
struct drm_connector_state *conn_state =
drm_atomic_get_new_connector_state(state, connector);
@@ -1179,9 +1309,13 @@ static void vc4_hdmi_encoder_pre_crtc_configure(struct drm_encoder *encoder,
unsigned long bvb_rate, hsm_rate;
unsigned long flags;
int ret;
+ int idx;
mutex_lock(&vc4_hdmi->mutex);
+ if (!drm_dev_enter(drm, &idx))
+ goto out;
+
/*
* As stated in RPi's vc4 firmware "HDMI state machine (HSM) clock must
* be faster than pixel clock, infinitesimally faster, tested in
@@ -1202,13 +1336,13 @@ static void vc4_hdmi_encoder_pre_crtc_configure(struct drm_encoder *encoder,
ret = clk_set_min_rate(vc4_hdmi->hsm_clock, hsm_rate);
if (ret) {
DRM_ERROR("Failed to set HSM clock rate: %d\n", ret);
- goto out;
+ goto err_dev_exit;
}
ret = pm_runtime_resume_and_get(&vc4_hdmi->pdev->dev);
if (ret < 0) {
DRM_ERROR("Failed to retain power domain: %d\n", ret);
- goto out;
+ goto err_dev_exit;
}
ret = clk_set_rate(vc4_hdmi->pixel_clock, tmds_char_rate);
@@ -1260,6 +1394,8 @@ static void vc4_hdmi_encoder_pre_crtc_configure(struct drm_encoder *encoder,
if (vc4_hdmi->variant->set_timings)
vc4_hdmi->variant->set_timings(vc4_hdmi, conn_state, mode);
+ drm_dev_exit(idx);
+
mutex_unlock(&vc4_hdmi->mutex);
return;
@@ -1268,6 +1404,8 @@ err_disable_pixel_clock:
clk_disable_unprepare(vc4_hdmi->pixel_clock);
err_put_runtime_pm:
pm_runtime_put(&vc4_hdmi->pdev->dev);
+err_dev_exit:
+ drm_dev_exit(idx);
out:
mutex_unlock(&vc4_hdmi->mutex);
return;
@@ -1277,14 +1415,19 @@ static void vc4_hdmi_encoder_pre_crtc_enable(struct drm_encoder *encoder,
struct drm_atomic_state *state)
{
struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
+ struct drm_device *drm = vc4_hdmi->connector.dev;
struct drm_connector *connector = &vc4_hdmi->connector;
struct drm_display_mode *mode = &vc4_hdmi->saved_adjusted_mode;
struct drm_connector_state *conn_state =
drm_atomic_get_new_connector_state(state, connector);
unsigned long flags;
+ int idx;
mutex_lock(&vc4_hdmi->mutex);
+ if (!drm_dev_enter(drm, &idx))
+ return;
+
if (vc4_hdmi->variant->csc_setup)
vc4_hdmi->variant->csc_setup(vc4_hdmi, conn_state, mode);
@@ -1292,6 +1435,8 @@ static void vc4_hdmi_encoder_pre_crtc_enable(struct drm_encoder *encoder,
HDMI_WRITE(HDMI_FIFO_CTL, VC4_HDMI_FIFO_CTL_MASTER_SLAVE_N);
spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
+ drm_dev_exit(idx);
+
mutex_unlock(&vc4_hdmi->mutex);
}
@@ -1299,15 +1444,20 @@ static void vc4_hdmi_encoder_post_crtc_enable(struct drm_encoder *encoder,
struct drm_atomic_state *state)
{
struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
+ struct drm_device *drm = vc4_hdmi->connector.dev;
struct drm_display_mode *mode = &vc4_hdmi->saved_adjusted_mode;
struct drm_display_info *display = &vc4_hdmi->connector.display_info;
bool hsync_pos = mode->flags & DRM_MODE_FLAG_PHSYNC;
bool vsync_pos = mode->flags & DRM_MODE_FLAG_PVSYNC;
unsigned long flags;
int ret;
+ int idx;
mutex_lock(&vc4_hdmi->mutex);
+ if (!drm_dev_enter(drm, &idx))
+ return;
+
spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
HDMI_WRITE(HDMI_VID_CTL,
@@ -1366,6 +1516,7 @@ static void vc4_hdmi_encoder_post_crtc_enable(struct drm_encoder *encoder,
vc4_hdmi_recenter_fifo(vc4_hdmi);
vc4_hdmi_enable_scrambling(encoder);
+ drm_dev_exit(idx);
mutex_unlock(&vc4_hdmi->mutex);
}
@@ -1714,13 +1865,20 @@ static u32 vc5_hdmi_channel_map(struct vc4_hdmi *vc4_hdmi, u32 channel_mask)
static bool vc5_hdmi_hp_detect(struct vc4_hdmi *vc4_hdmi)
{
+ struct drm_device *drm = vc4_hdmi->connector.dev;
unsigned long flags;
u32 hotplug;
+ int idx;
+
+ if (!drm_dev_enter(drm, &idx))
+ return false;
spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
hotplug = HDMI_READ(HDMI_HOTPLUG);
spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
+ drm_dev_exit(idx);
+
return !!(hotplug & VC4_HDMI_HOTPLUG_CONNECTED);
}
@@ -1728,10 +1886,16 @@ static bool vc5_hdmi_hp_detect(struct vc4_hdmi *vc4_hdmi)
static void vc4_hdmi_audio_set_mai_clock(struct vc4_hdmi *vc4_hdmi,
unsigned int samplerate)
{
- u32 hsm_clock = clk_get_rate(vc4_hdmi->audio_clock);
+ struct drm_device *drm = vc4_hdmi->connector.dev;
+ u32 hsm_clock;
unsigned long flags;
unsigned long n, m;
+ int idx;
+
+ if (!drm_dev_enter(drm, &idx))
+ return;
+ hsm_clock = clk_get_rate(vc4_hdmi->audio_clock);
rational_best_approximation(hsm_clock, samplerate,
VC4_HD_MAI_SMP_N_MASK >>
VC4_HD_MAI_SMP_N_SHIFT,
@@ -1744,6 +1908,8 @@ static void vc4_hdmi_audio_set_mai_clock(struct vc4_hdmi *vc4_hdmi,
VC4_SET_FIELD(n, VC4_HD_MAI_SMP_N) |
VC4_SET_FIELD(m - 1, VC4_HD_MAI_SMP_M));
spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
+
+ drm_dev_exit(idx);
}
static void vc4_hdmi_set_n_cts(struct vc4_hdmi *vc4_hdmi, unsigned int samplerate)
@@ -1799,13 +1965,21 @@ static bool vc4_hdmi_audio_can_stream(struct vc4_hdmi *vc4_hdmi)
static int vc4_hdmi_audio_startup(struct device *dev, void *data)
{
struct vc4_hdmi *vc4_hdmi = dev_get_drvdata(dev);
+ struct drm_device *drm = vc4_hdmi->connector.dev;
unsigned long flags;
+ int ret = 0;
+ int idx;
mutex_lock(&vc4_hdmi->mutex);
+ if (!drm_dev_enter(drm, &idx)) {
+ ret = -ENODEV;
+ goto out;
+ }
+
if (!vc4_hdmi_audio_can_stream(vc4_hdmi)) {
- mutex_unlock(&vc4_hdmi->mutex);
- return -ENODEV;
+ ret = -ENODEV;
+ goto out_dev_exit;
}
vc4_hdmi->audio.streaming = true;
@@ -1822,9 +1996,12 @@ static int vc4_hdmi_audio_startup(struct device *dev, void *data)
if (vc4_hdmi->variant->phy_rng_enable)
vc4_hdmi->variant->phy_rng_enable(vc4_hdmi);
+out_dev_exit:
+ drm_dev_exit(idx);
+out:
mutex_unlock(&vc4_hdmi->mutex);
- return 0;
+ return ret;
}
static void vc4_hdmi_audio_reset(struct vc4_hdmi *vc4_hdmi)
@@ -1853,10 +2030,15 @@ static void vc4_hdmi_audio_reset(struct vc4_hdmi *vc4_hdmi)
static void vc4_hdmi_audio_shutdown(struct device *dev, void *data)
{
struct vc4_hdmi *vc4_hdmi = dev_get_drvdata(dev);
+ struct drm_device *drm = vc4_hdmi->connector.dev;
unsigned long flags;
+ int idx;
mutex_lock(&vc4_hdmi->mutex);
+ if (!drm_dev_enter(drm, &idx))
+ goto out;
+
spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
HDMI_WRITE(HDMI_MAI_CTL,
@@ -1872,6 +2054,9 @@ static void vc4_hdmi_audio_shutdown(struct device *dev, void *data)
vc4_hdmi->audio.streaming = false;
vc4_hdmi_audio_reset(vc4_hdmi);
+ drm_dev_exit(idx);
+
+out:
mutex_unlock(&vc4_hdmi->mutex);
}
@@ -1919,6 +2104,7 @@ static int vc4_hdmi_audio_prepare(struct device *dev, void *data,
struct hdmi_codec_params *params)
{
struct vc4_hdmi *vc4_hdmi = dev_get_drvdata(dev);
+ struct drm_device *drm = vc4_hdmi->connector.dev;
struct drm_encoder *encoder = &vc4_hdmi->encoder.base;
unsigned int sample_rate = params->sample_rate;
unsigned int channels = params->channels;
@@ -1927,15 +2113,22 @@ static int vc4_hdmi_audio_prepare(struct device *dev, void *data,
u32 channel_map;
u32 mai_audio_format;
u32 mai_sample_rate;
+ int ret = 0;
+ int idx;
dev_dbg(dev, "%s: %u Hz, %d bit, %d channels\n", __func__,
sample_rate, params->sample_width, channels);
mutex_lock(&vc4_hdmi->mutex);
+ if (!drm_dev_enter(drm, &idx)) {
+ ret = -ENODEV;
+ goto out;
+ }
+
if (!vc4_hdmi_audio_can_stream(vc4_hdmi)) {
- mutex_unlock(&vc4_hdmi->mutex);
- return -EINVAL;
+ ret = -EINVAL;
+ goto out_dev_exit;
}
vc4_hdmi_audio_set_mai_clock(vc4_hdmi, sample_rate);
@@ -1992,9 +2185,12 @@ static int vc4_hdmi_audio_prepare(struct device *dev, void *data,
memcpy(&vc4_hdmi->audio.infoframe, &params->cea, sizeof(params->cea));
vc4_hdmi_set_audio_infoframe(encoder);
+out_dev_exit:
+ drm_dev_exit(idx);
+out:
mutex_unlock(&vc4_hdmi->mutex);
- return 0;
+ return ret;
}
static const struct snd_soc_component_driver vc4_hdmi_audio_cpu_dai_comp = {
@@ -2329,6 +2525,17 @@ static irqreturn_t vc4_cec_irq_handler_tx_bare_locked(struct vc4_hdmi *vc4_hdmi)
{
u32 cntrl1;
+ /*
+ * We don't need to protect the register access using
+ * drm_dev_enter() there because the interrupt handler lifetime
+ * is tied to the device itself, and not to the DRM device.
+ *
+ * So when the device will be gone, one of the first thing we
+ * will be doing will be to unregister the interrupt handler,
+ * and then unregister the DRM device. drm_dev_enter() would
+ * thus always succeed if we are here.
+ */
+
lockdep_assert_held(&vc4_hdmi->hw_lock);
cntrl1 = HDMI_READ(HDMI_CEC_CNTRL_1);
@@ -2357,6 +2564,17 @@ static irqreturn_t vc4_cec_irq_handler_rx_bare_locked(struct vc4_hdmi *vc4_hdmi)
lockdep_assert_held(&vc4_hdmi->hw_lock);
+ /*
+ * We don't need to protect the register access using
+ * drm_dev_enter() there because the interrupt handler lifetime
+ * is tied to the device itself, and not to the DRM device.
+ *
+ * So when the device will be gone, one of the first thing we
+ * will be doing will be to unregister the interrupt handler,
+ * and then unregister the DRM device. drm_dev_enter() would
+ * thus always succeed if we are here.
+ */
+
vc4_hdmi->cec_rx_msg.len = 0;
cntrl1 = HDMI_READ(HDMI_CEC_CNTRL_1);
vc4_cec_read_msg(vc4_hdmi, cntrl1);
@@ -2388,6 +2606,17 @@ static irqreturn_t vc4_cec_irq_handler(int irq, void *priv)
irqreturn_t ret;
u32 cntrl5;
+ /*
+ * We don't need to protect the register access using
+ * drm_dev_enter() there because the interrupt handler lifetime
+ * is tied to the device itself, and not to the DRM device.
+ *
+ * So when the device will be gone, one of the first thing we
+ * will be doing will be to unregister the interrupt handler,
+ * and then unregister the DRM device. drm_dev_enter() would
+ * thus always succeed if we are here.
+ */
+
if (!(stat & VC4_HDMI_CPU_CEC))
return IRQ_NONE;
@@ -2408,11 +2637,13 @@ static irqreturn_t vc4_cec_irq_handler(int irq, void *priv)
static int vc4_hdmi_cec_enable(struct cec_adapter *adap)
{
struct vc4_hdmi *vc4_hdmi = cec_get_drvdata(adap);
+ struct drm_device *drm = vc4_hdmi->connector.dev;
/* clock period in microseconds */
const u32 usecs = 1000000 / CEC_CLOCK_FREQ;
unsigned long flags;
u32 val;
int ret;
+ int idx;
/*
* NOTE: This function should really take vc4_hdmi->mutex, but doing so
@@ -2425,9 +2656,19 @@ static int vc4_hdmi_cec_enable(struct cec_adapter *adap)
* keep it in mind if we were to change that assumption.
*/
+ if (!drm_dev_enter(drm, &idx))
+ /*
+ * We can't return an error code, because the CEC
+ * framework will emit WARN_ON messages at unbind
+ * otherwise.
+ */
+ return 0;
+
ret = pm_runtime_resume_and_get(&vc4_hdmi->pdev->dev);
- if (ret)
+ if (ret) {
+ drm_dev_exit(idx);
return ret;
+ }
spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
@@ -2463,13 +2704,25 @@ static int vc4_hdmi_cec_enable(struct cec_adapter *adap)
spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
+ drm_dev_exit(idx);
+
return 0;
}
static int vc4_hdmi_cec_disable(struct cec_adapter *adap)
{
struct vc4_hdmi *vc4_hdmi = cec_get_drvdata(adap);
+ struct drm_device *drm = vc4_hdmi->connector.dev;
unsigned long flags;
+ int idx;
+
+ if (!drm_dev_enter(drm, &idx))
+ /*
+ * We can't return an error code, because the CEC
+ * framework will emit WARN_ON messages at unbind
+ * otherwise.
+ */
+ return 0;
/*
* NOTE: This function should really take vc4_hdmi->mutex, but doing so
@@ -2494,6 +2747,8 @@ static int vc4_hdmi_cec_disable(struct cec_adapter *adap)
pm_runtime_put(&vc4_hdmi->pdev->dev);
+ drm_dev_exit(idx);
+
return 0;
}
@@ -2508,7 +2763,9 @@ static int vc4_hdmi_cec_adap_enable(struct cec_adapter *adap, bool enable)
static int vc4_hdmi_cec_adap_log_addr(struct cec_adapter *adap, u8 log_addr)
{
struct vc4_hdmi *vc4_hdmi = cec_get_drvdata(adap);
+ struct drm_device *drm = vc4_hdmi->connector.dev;
unsigned long flags;
+ int idx;
/*
* NOTE: This function should really take vc4_hdmi->mutex, but doing so
@@ -2521,12 +2778,22 @@ static int vc4_hdmi_cec_adap_log_addr(struct cec_adapter *adap, u8 log_addr)
* keep it in mind if we were to change that assumption.
*/
+ if (!drm_dev_enter(drm, &idx))
+ /*
+ * We can't return an error code, because the CEC
+ * framework will emit WARN_ON messages at unbind
+ * otherwise.
+ */
+ return 0;
+
spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
HDMI_WRITE(HDMI_CEC_CNTRL_1,
(HDMI_READ(HDMI_CEC_CNTRL_1) & ~VC4_HDMI_CEC_ADDR_MASK) |
(log_addr & 0xf) << VC4_HDMI_CEC_ADDR_SHIFT);
spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
+ drm_dev_exit(idx);
+
return 0;
}
@@ -2538,6 +2805,7 @@ static int vc4_hdmi_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
unsigned long flags;
u32 val;
unsigned int i;
+ int idx;
/*
* NOTE: This function should really take vc4_hdmi->mutex, but doing so
@@ -2550,8 +2818,12 @@ static int vc4_hdmi_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
* keep it in mind if we were to change that assumption.
*/
+ if (!drm_dev_enter(dev, &idx))
+ return -ENODEV;
+
if (msg->len > 16) {
drm_err(dev, "Attempting to transmit too much data (%d)\n", msg->len);
+ drm_dev_exit(idx);
return -ENOMEM;
}
@@ -2575,6 +2847,8 @@ static int vc4_hdmi_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
+ drm_dev_exit(idx);
+
return 0;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-08-07 00:14:32 +0000