[PATCH v2 0/2] drm/vc4: hdmi: Replace drm_detect_hdmi_monitor() with drm_display_info.is_hdmi
Hi everyone,
These patches replace the calls to drm_detect_hdmi_monitor() with the more efficient drm_display_info.is_hdmi in the VC4 driver.
As I mentioned in v1, vc4_hdmi_encoder.hdmi_monitor (removed by this series) is used by some code not present in the mainline kernel but present in the Raspberry Pi tree [1]. Let me know if you want me to open a PR in the Raspberry Pi kernel project applying this series and fixing this issue.
Thanks, José Expósito
[1] https://github.com/raspberrypi/linux/blob/rpi-5.15.y/drivers/gpu/drm/vc4/vc4...
v1: https://lore.kernel.org/dri-devel/20220406165514.6106-1-jose.exposito89@gmai...
v2: Add the ftrace command used in the first patch Remove vc4_hdmi_encoder.hdmi_monitor (Thanks to Maxime for suggesting these changes)
José Expósito (2): drm/vc4: hdmi: Replace drm_detect_hdmi_monitor() with is_hdmi drm/vc4: hdmi: Remove vc4_hdmi_encoder.hdmi_monitor
drivers/gpu/drm/vc4/vc4_hdmi.c | 17 ++++++----------- drivers/gpu/drm/vc4/vc4_hdmi.h | 1 - 2 files changed, 6 insertions(+), 12 deletions(-)
Once EDID is parsed, the monitor HDMI support information is cached in drm_display_info.is_hdmi by drm_parse_hdmi_vsdb_video().
This driver calls drm_detect_hdmi_monitor() to receive the same information and stores its own cached value, which is less efficient.
Avoid calling drm_detect_hdmi_monitor() and use drm_display_info.is_hdmi instead.
drm_detect_hdmi_monitor() is called in vc4_hdmi_connector_detect() and vc4_hdmi_connector_get_modes(). In both cases it is safe to rely on drm_display_info.is_hdmi as shown by ftrace:
$ sudo trace-cmd record -p function_graph -l "vc4_hdmi_*" -l "drm_*"
vc4_hdmi_connector_detect:
vc4_hdmi_connector_detect() { drm_get_edid() { drm_connector_update_edid_property() { drm_add_display_info() { drm_reset_display_info(); drm_for_each_detailed_block.part.0(); drm_parse_cea_ext() { drm_find_cea_extension(); drm_parse_hdmi_vsdb_video(); /* drm_display_info.is_hdmi is cached here */ } } } } /* drm_display_info.is_hdmi is used here */ }
vc4_hdmi_connector_get_modes:
vc4_hdmi_connector_get_modes() { drm_get_edid() { drm_connector_update_edid_property() { drm_add_display_info() { drm_reset_display_info(); drm_for_each_detailed_block.part.0(); drm_parse_cea_ext() { drm_find_cea_extension(); drm_parse_hdmi_vsdb_video(); /* drm_display_info.is_hdmi is cached here */ } } } } /* drm_display_info.is_hdmi is used here */ drm_connector_update_edid_property(); }
Signed-off-by: José Expósito jose.exposito89@gmail.com --- drivers/gpu/drm/vc4/vc4_hdmi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c index 6c58b0fd13fb..ecdb1ffc2023 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c @@ -216,7 +216,7 @@ vc4_hdmi_connector_detect(struct drm_connector *connector, bool force)
if (edid) { cec_s_phys_addr_from_edid(vc4_hdmi->cec_adap, edid); - vc4_hdmi->encoder.hdmi_monitor = drm_detect_hdmi_monitor(edid); + vc4_hdmi->encoder.hdmi_monitor = connector->display_info.is_hdmi; kfree(edid); } } @@ -255,7 +255,7 @@ static int vc4_hdmi_connector_get_modes(struct drm_connector *connector) goto out; }
- vc4_encoder->hdmi_monitor = drm_detect_hdmi_monitor(edid); + vc4_encoder->hdmi_monitor = connector->display_info.is_hdmi;
drm_connector_update_edid_property(connector, edid); ret = drm_add_edid_modes(connector, edid);
The vc4_hdmi_encoder.hdmi_monitor field was used to cache the value returned by drm_detect_hdmi_monitor() in order to avoid calling it multiple times.
Now that drm_detect_hdmi_monitor() has been replaced with drm_display_info.is_hdmi, there is no need to cache it in the driver encoder struct.
Remove vc4_hdmi_encoder.hdmi_monitor and use drm_display_info.is_hdmi instead.
Signed-off-by: José Expósito jose.exposito89@gmail.com --- drivers/gpu/drm/vc4/vc4_hdmi.c | 17 ++++++----------- drivers/gpu/drm/vc4/vc4_hdmi.h | 1 - 2 files changed, 6 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c index ecdb1ffc2023..9c73a211ae80 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c @@ -107,9 +107,9 @@ static bool vc4_hdmi_mode_needs_scrambling(const struct drm_display_mode *mode) static bool vc4_hdmi_is_full_range_rgb(struct vc4_hdmi *vc4_hdmi, const struct drm_display_mode *mode) { - struct vc4_hdmi_encoder *vc4_encoder = &vc4_hdmi->encoder; + struct drm_display_info *display = &vc4_hdmi->connector.display_info;
- return !vc4_encoder->hdmi_monitor || + return !display->is_hdmi || drm_default_rgb_quant_range(mode) == HDMI_QUANTIZATION_RANGE_FULL; }
@@ -216,7 +216,6 @@ vc4_hdmi_connector_detect(struct drm_connector *connector, bool force)
if (edid) { cec_s_phys_addr_from_edid(vc4_hdmi->cec_adap, edid); - vc4_hdmi->encoder.hdmi_monitor = connector->display_info.is_hdmi; kfree(edid); } } @@ -242,7 +241,6 @@ static void vc4_hdmi_connector_destroy(struct drm_connector *connector) static int vc4_hdmi_connector_get_modes(struct drm_connector *connector) { struct vc4_hdmi *vc4_hdmi = connector_to_vc4_hdmi(connector); - struct vc4_hdmi_encoder *vc4_encoder = &vc4_hdmi->encoder; int ret = 0; struct edid *edid;
@@ -255,8 +253,6 @@ static int vc4_hdmi_connector_get_modes(struct drm_connector *connector) goto out; }
- vc4_encoder->hdmi_monitor = connector->display_info.is_hdmi; - drm_connector_update_edid_property(connector, edid); ret = drm_add_edid_modes(connector, edid); kfree(edid); @@ -578,13 +574,12 @@ static void vc4_hdmi_set_infoframes(struct drm_encoder *encoder) static bool vc4_hdmi_supports_scrambling(struct drm_encoder *encoder, struct drm_display_mode *mode) { - struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder); struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder); struct drm_display_info *display = &vc4_hdmi->connector.display_info;
lockdep_assert_held(&vc4_hdmi->mutex);
- if (!vc4_encoder->hdmi_monitor) + if (!display->is_hdmi) return false;
if (!display->hdmi.scdc.supported || @@ -1147,7 +1142,7 @@ static void vc4_hdmi_encoder_post_crtc_enable(struct drm_encoder *encoder, { struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder); struct drm_display_mode *mode = &vc4_hdmi->saved_adjusted_mode; - struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder); + 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; @@ -1168,7 +1163,7 @@ static void vc4_hdmi_encoder_post_crtc_enable(struct drm_encoder *encoder, HDMI_WRITE(HDMI_VID_CTL, HDMI_READ(HDMI_VID_CTL) & ~VC4_HD_VID_CTL_BLANKPIX);
- if (vc4_encoder->hdmi_monitor) { + if (display->is_hdmi) { HDMI_WRITE(HDMI_SCHEDULER_CONTROL, HDMI_READ(HDMI_SCHEDULER_CONTROL) | VC4_HDMI_SCHEDULER_CONTROL_MODE_HDMI); @@ -1195,7 +1190,7 @@ static void vc4_hdmi_encoder_post_crtc_enable(struct drm_encoder *encoder, "!VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE\n"); }
- if (vc4_encoder->hdmi_monitor) { + if (display->is_hdmi) { spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
WARN_ON(!(HDMI_READ(HDMI_SCHEDULER_CONTROL) & diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.h b/drivers/gpu/drm/vc4/vc4_hdmi.h index 1076faeab616..44977002445f 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.h +++ b/drivers/gpu/drm/vc4/vc4_hdmi.h @@ -11,7 +11,6 @@ /* VC4 HDMI encoder KMS struct */ struct vc4_hdmi_encoder { struct vc4_encoder base; - bool hdmi_monitor; };
static inline struct vc4_hdmi_encoder *
Hi,
On Fri, Apr 15, 2022 at 05:47:45PM +0200, José Expósito wrote:
The vc4_hdmi_encoder.hdmi_monitor field was used to cache the value returned by drm_detect_hdmi_monitor() in order to avoid calling it multiple times.
Now that drm_detect_hdmi_monitor() has been replaced with drm_display_info.is_hdmi, there is no need to cache it in the driver encoder struct.
Remove vc4_hdmi_encoder.hdmi_monitor and use drm_display_info.is_hdmi instead.
Signed-off-by: José Expósito jose.exposito89@gmail.com
drivers/gpu/drm/vc4/vc4_hdmi.c | 17 ++++++----------- drivers/gpu/drm/vc4/vc4_hdmi.h | 1 - 2 files changed, 6 insertions(+), 12 deletions(-)
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c index ecdb1ffc2023..9c73a211ae80 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c @@ -107,9 +107,9 @@ static bool vc4_hdmi_mode_needs_scrambling(const struct drm_display_mode *mode) static bool vc4_hdmi_is_full_range_rgb(struct vc4_hdmi *vc4_hdmi, const struct drm_display_mode *mode) {
- struct vc4_hdmi_encoder *vc4_encoder = &vc4_hdmi->encoder;
- struct drm_display_info *display = &vc4_hdmi->connector.display_info;
- return !vc4_encoder->hdmi_monitor ||
- return !display->is_hdmi || drm_default_rgb_quant_range(mode) == HDMI_QUANTIZATION_RANGE_FULL;
}
@@ -216,7 +216,6 @@ vc4_hdmi_connector_detect(struct drm_connector *connector, bool force)
if (edid) { cec_s_phys_addr_from_edid(vc4_hdmi->cec_adap, edid);
vc4_hdmi->encoder.hdmi_monitor = connector->display_info.is_hdmi;
I think the first patch could be squashed into this one
kfree(edid); } }@@ -242,7 +241,6 @@ static void vc4_hdmi_connector_destroy(struct drm_connector *connector) static int vc4_hdmi_connector_get_modes(struct drm_connector *connector) { struct vc4_hdmi *vc4_hdmi = connector_to_vc4_hdmi(connector);
- struct vc4_hdmi_encoder *vc4_encoder = &vc4_hdmi->encoder; int ret = 0; struct edid *edid;
@@ -255,8 +253,6 @@ static int vc4_hdmi_connector_get_modes(struct drm_connector *connector) goto out; }
- vc4_encoder->hdmi_monitor = connector->display_info.is_hdmi;
- drm_connector_update_edid_property(connector, edid); ret = drm_add_edid_modes(connector, edid); kfree(edid);
@@ -578,13 +574,12 @@ static void vc4_hdmi_set_infoframes(struct drm_encoder *encoder) static bool vc4_hdmi_supports_scrambling(struct drm_encoder *encoder, struct drm_display_mode *mode) {
struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder); struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder); struct drm_display_info *display = &vc4_hdmi->connector.display_info;
lockdep_assert_held(&vc4_hdmi->mutex);
if (!vc4_encoder->hdmi_monitor)
if (!display->is_hdmi) return false;
if (!display->hdmi.scdc.supported ||
@@ -1147,7 +1142,7 @@ static void vc4_hdmi_encoder_post_crtc_enable(struct drm_encoder *encoder, { struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder); struct drm_display_mode *mode = &vc4_hdmi->saved_adjusted_mode;
- struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
- 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;
@@ -1168,7 +1163,7 @@ static void vc4_hdmi_encoder_post_crtc_enable(struct drm_encoder *encoder, HDMI_WRITE(HDMI_VID_CTL, HDMI_READ(HDMI_VID_CTL) & ~VC4_HD_VID_CTL_BLANKPIX);
- if (vc4_encoder->hdmi_monitor) {
- if (display->is_hdmi) { HDMI_WRITE(HDMI_SCHEDULER_CONTROL, HDMI_READ(HDMI_SCHEDULER_CONTROL) | VC4_HDMI_SCHEDULER_CONTROL_MODE_HDMI);
@@ -1195,7 +1190,7 @@ static void vc4_hdmi_encoder_post_crtc_enable(struct drm_encoder *encoder, "!VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE\n"); }
- if (vc4_encoder->hdmi_monitor) {
if (display->is_hdmi) { spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
WARN_ON(!(HDMI_READ(HDMI_SCHEDULER_CONTROL) &
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.h b/drivers/gpu/drm/vc4/vc4_hdmi.h index 1076faeab616..44977002445f 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.h +++ b/drivers/gpu/drm/vc4/vc4_hdmi.h @@ -11,7 +11,6 @@ /* VC4 HDMI encoder KMS struct */ struct vc4_hdmi_encoder { struct vc4_encoder base;
- bool hdmi_monitor;
};
And vc4_hdmi_encoder doesn't hold anything anymore now, so it can be removed as well. Doing it in a subsequent patch would probably be the most readable.
Thanks! Maxime
dri-devel@lists.freedesktop.org
-
José Expósito -
Maxime Ripard