diff options
| author | Maxime Ripard <maxime@cerno.tech> | 2021-01-11 15:23:02 +0100 |
|---|---|---|
| committer | Maxime Ripard <maxime@cerno.tech> | 2021-01-28 10:28:39 +0100 |
| commit | cd7f016c93b697dea79a884162cbf7311283fe12 (patch) | |
| tree | 60900c61ef0a7e2ef023536ec59b64115c76f70f /drivers/gpu/drm/vc4 | |
| parent | a9dd0b9a5c3e11c79e6ff9c7fdf07c471732dcb6 (diff) | |
| download | linux-cd7f016c93b697dea79a884162cbf7311283fe12.tar.bz2 | |
drm/vc4: hdmi: Introduce a CEC clock
While the BCM2835 had the CEC clock derived from the HSM clock, the
BCM2711 has a dedicated parent clock for it.
Let's introduce a separate clock for it so that we can handle both
cases.
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Tested-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Link: https://patchwork.freedesktop.org/patch/msgid/20210111142309.193441-9-maxime@cerno.tech
Diffstat (limited to 'drivers/gpu/drm/vc4')
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_hdmi.c | 9 | ||||
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_hdmi.h | 1 |
2 files changed, 9 insertions, 1 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c index 0627b8db32f6..7b5c92df8f1b 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c @@ -145,7 +145,7 @@ static void vc4_hdmi_cec_update_clk_div(struct vc4_hdmi *vc4_hdmi) * Set the clock divider: the hsm_clock rate and this divider * setting will give a 40 kHz CEC clock. */ - clk_cnt = clk_get_rate(vc4_hdmi->hsm_clock) / CEC_CLOCK_FREQ; + clk_cnt = clk_get_rate(vc4_hdmi->cec_clock) / CEC_CLOCK_FREQ; value |= clk_cnt << VC4_HDMI_CEC_DIV_CLK_CNT_SHIFT; HDMI_WRITE(HDMI_CEC_CNTRL_1, value); } @@ -1752,6 +1752,7 @@ static int vc4_hdmi_init_resources(struct vc4_hdmi *vc4_hdmi) return PTR_ERR(vc4_hdmi->hsm_clock); } vc4_hdmi->audio_clock = vc4_hdmi->hsm_clock; + vc4_hdmi->cec_clock = vc4_hdmi->hsm_clock; return 0; } @@ -1845,6 +1846,12 @@ static int vc5_hdmi_init_resources(struct vc4_hdmi *vc4_hdmi) return PTR_ERR(vc4_hdmi->audio_clock); } + vc4_hdmi->cec_clock = devm_clk_get(dev, "cec"); + if (IS_ERR(vc4_hdmi->cec_clock)) { + DRM_ERROR("Failed to get CEC clock\n"); + return PTR_ERR(vc4_hdmi->cec_clock); + } + vc4_hdmi->reset = devm_reset_control_get(dev, NULL); if (IS_ERR(vc4_hdmi->reset)) { DRM_ERROR("Failed to get HDMI reset line\n"); diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.h b/drivers/gpu/drm/vc4/vc4_hdmi.h index 4c8994cfd932..6966db1a0957 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.h +++ b/drivers/gpu/drm/vc4/vc4_hdmi.h @@ -155,6 +155,7 @@ struct vc4_hdmi { bool cec_tx_ok; bool cec_irq_was_rx; + struct clk *cec_clock; struct clk *pixel_clock; struct clk *hsm_clock; struct clk *audio_clock; |