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drm/vc4: hdmi: Store pixel frequency in the connector state

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The pixel rate is for now quite simple to compute, but with more features
(30 and 36 bits output, YUV output, etc.) will depend on a bunch of
connectors properties.

Let's store the rate we have to run the pixel clock at in our custom
connector state, and compute it in atomic_check.

Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20201215154243.540115-7-maxime@cerno.tech
This commit is contained in:
Maxime Ripard 2020-12-15 16:42:40 +01:00
parent fbe7271e47
commit f623746f74
No known key found for this signature in database
GPG key ID: E3EF0D6F671851C5
2 changed files with 26 additions and 1 deletions
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26
drivers/gpu/drm/vc4/vc4_hdmi.c
View file

@ -198,6 +198,7 @@ vc4_hdmi_connector_duplicate_state(struct drm_connector *connector)
if (!new_state)
return NULL;
new_state->pixel_rate = vc4_state->pixel_rate;
__drm_atomic_helper_connector_duplicate_state(connector, &new_state->base);
return &new_state->base;
@ -618,9 +619,29 @@ static void vc4_hdmi_recenter_fifo(struct vc4_hdmi *vc4_hdmi)
"VC4_HDMI_FIFO_CTL_RECENTER_DONE");
}
static struct drm_connector_state *
vc4_hdmi_encoder_get_connector_state(struct drm_encoder *encoder,
struct drm_atomic_state *state)
{
struct drm_connector_state *conn_state;
struct drm_connector *connector;
unsigned int i;
for_each_new_connector_in_state(state, connector, conn_state, i) {
if (conn_state->best_encoder == encoder)
return conn_state;
}
return NULL;
}
static void vc4_hdmi_encoder_pre_crtc_configure(struct drm_encoder *encoder,
struct drm_atomic_state *state)
{
struct drm_connector_state *conn_state =
vc4_hdmi_encoder_get_connector_state(encoder, state);
struct vc4_hdmi_connector_state *vc4_conn_state =
conn_state_to_vc4_hdmi_conn_state(conn_state);
struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
unsigned long pixel_rate, hsm_rate;
@ -632,7 +653,7 @@ static void vc4_hdmi_encoder_pre_crtc_configure(struct drm_encoder *encoder,
return;
}
pixel_rate = mode->clock * 1000 * ((mode->flags & DRM_MODE_FLAG_DBLCLK) ? 2 : 1);
pixel_rate = vc4_conn_state->pixel_rate;
ret = clk_set_rate(vc4_hdmi->pixel_clock, pixel_rate);
if (ret) {
DRM_ERROR("Failed to set pixel clock rate: %d\n", ret);
@ -804,6 +825,7 @@ static int vc4_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
struct vc4_hdmi_connector_state *vc4_state = conn_state_to_vc4_hdmi_conn_state(conn_state);
struct drm_display_mode *mode = &crtc_state->adjusted_mode;
struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
unsigned long long pixel_rate = mode->clock * 1000;
@ -834,6 +856,8 @@ static int vc4_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
if (pixel_rate > vc4_hdmi->variant->max_pixel_clock)
return -EINVAL;
vc4_state->pixel_rate = pixel_rate;
return 0;
}

1
drivers/gpu/drm/vc4/vc4_hdmi.h
View file

@ -182,6 +182,7 @@ encoder_to_vc4_hdmi(struct drm_encoder *encoder)
struct vc4_hdmi_connector_state {
struct drm_connector_state base;
unsigned long long pixel_rate;
};
static inline struct vc4_hdmi_connector_state *