Hi Maxime On Thu, 20 Oct 2022 at 10:14, <maxime@xxxxxxxxxx> wrote: > > In order to support higher HDMI frequencies, users have to set the > hdmi_enable_4kp60 parameter in their config.txt file. > > This will have the side-effect of raising the maximum of the core clock, > tied to the HVS, and managed by the HVS driver. > > However, we are querying this in the HDMI driver by poking into the HVS > structure to get our struct clk handle. > > Let's make this part of the HVS bind implementation to have all the core > clock related setup in the same place. > > Signed-off-by: Maxime Ripard <maxime@xxxxxxxxxx> > --- > drivers/gpu/drm/vc4/vc4_drv.h | 10 ++++++++++ > drivers/gpu/drm/vc4/vc4_hdmi.c | 15 ++++----------- > drivers/gpu/drm/vc4/vc4_hdmi.h | 8 -------- > drivers/gpu/drm/vc4/vc4_hvs.c | 23 +++++++++++++++++++++++ > 4 files changed, 37 insertions(+), 19 deletions(-) > > diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h > index 418a8242691f..8b2b1af565f9 100644 > --- a/drivers/gpu/drm/vc4/vc4_drv.h > +++ b/drivers/gpu/drm/vc4/vc4_drv.h > @@ -326,6 +326,8 @@ struct vc4_hvs { > > struct clk *core_clk; > > + unsigned long max_core_rate; > + > /* Memory manager for CRTCs to allocate space in the display > * list. Units are dwords. > */ > @@ -337,6 +339,14 @@ struct vc4_hvs { > struct drm_mm_node mitchell_netravali_filter; > > struct debugfs_regset32 regset; > + > + /* > + * Even if HDMI0 on the RPi4 can output modes requiring a pixel > + * rate higher than 297MHz, it needs some adjustments in the > + * config.txt file to be able to do so and thus won't always be > + * available. > + */ > + bool vc5_hdmi_enable_scrambling; > }; > > struct vc4_plane { > diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c > index 87961d4de5aa..afe3daa2173e 100644 > --- a/drivers/gpu/drm/vc4/vc4_hdmi.c > +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c > @@ -46,7 +46,6 @@ > #include <linux/pm_runtime.h> > #include <linux/rational.h> > #include <linux/reset.h> > -#include <soc/bcm2835/raspberrypi-clocks.h> > #include <sound/dmaengine_pcm.h> > #include <sound/hdmi-codec.h> > #include <sound/pcm_drm_eld.h> > @@ -460,6 +459,7 @@ static int vc4_hdmi_connector_detect_ctx(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_dev *vc4 = to_vc4_dev(connector->dev); > int ret = 0; > struct edid *edid; > > @@ -483,7 +483,7 @@ static int vc4_hdmi_connector_get_modes(struct drm_connector *connector) > ret = drm_add_edid_modes(connector, edid); > kfree(edid); > > - if (vc4_hdmi->disable_4kp60) { > + if (!vc4->hvs->vc5_hdmi_enable_scrambling) { > struct drm_device *drm = connector->dev; > const struct drm_display_mode *mode; > > @@ -1757,11 +1757,12 @@ vc4_hdmi_encoder_clock_valid(const struct vc4_hdmi *vc4_hdmi, > { > const struct drm_connector *connector = &vc4_hdmi->connector; > const struct drm_display_info *info = &connector->display_info; > + struct vc4_dev *vc4 = to_vc4_dev(connector->dev); > > if (clock > vc4_hdmi->variant->max_pixel_clock) > return MODE_CLOCK_HIGH; > > - if (vc4_hdmi->disable_4kp60 && clock > HDMI_14_MAX_TMDS_CLK) > + if (!vc4->hvs->vc5_hdmi_enable_scrambling && clock > HDMI_14_MAX_TMDS_CLK) > return MODE_CLOCK_HIGH; > > if (info->max_tmds_clock && clock > (info->max_tmds_clock * 1000)) > @@ -3428,14 +3429,6 @@ static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data) > vc4_hdmi->disable_wifi_frequencies = > of_property_read_bool(dev->of_node, "wifi-2.4ghz-coexistence"); > > - if (variant->max_pixel_clock == 600000000) { > - struct vc4_dev *vc4 = to_vc4_dev(drm); > - unsigned long max_rate = rpi_firmware_clk_get_max_rate(vc4->hvs->core_clk); > - > - if (max_rate < 550000000) > - vc4_hdmi->disable_4kp60 = true; > - } > - > ret = devm_pm_runtime_enable(dev); > if (ret) > return ret; > diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.h b/drivers/gpu/drm/vc4/vc4_hdmi.h > index db823efb2563..e3619836ca17 100644 > --- a/drivers/gpu/drm/vc4/vc4_hdmi.h > +++ b/drivers/gpu/drm/vc4/vc4_hdmi.h > @@ -156,14 +156,6 @@ struct vc4_hdmi { > */ > bool disable_wifi_frequencies; > > - /* > - * Even if HDMI0 on the RPi4 can output modes requiring a pixel > - * rate higher than 297MHz, it needs some adjustments in the > - * config.txt file to be able to do so and thus won't always be > - * available. > - */ > - bool disable_4kp60; > - > struct cec_adapter *cec_adap; > struct cec_msg cec_rx_msg; > bool cec_tx_ok; > diff --git a/drivers/gpu/drm/vc4/vc4_hvs.c b/drivers/gpu/drm/vc4/vc4_hvs.c > index 4ac9f5a2d5f9..300ac0b57571 100644 > --- a/drivers/gpu/drm/vc4/vc4_hvs.c > +++ b/drivers/gpu/drm/vc4/vc4_hvs.c > @@ -28,6 +28,8 @@ > #include <drm/drm_drv.h> > #include <drm/drm_vblank.h> > > +#include <soc/bcm2835/raspberrypi-firmware.h> > + > #include "vc4_drv.h" > #include "vc4_regs.h" > > @@ -791,12 +793,33 @@ static int vc4_hvs_bind(struct device *dev, struct device *master, void *data) > hvs->regset.nregs = ARRAY_SIZE(hvs_regs); > > if (vc4->is_vc5) { > + struct rpi_firmware *firmware; > + struct device_node *node; > + unsigned long max_rate; As commented on patch 4, the value returned by rpi_firmware_clk_get_max_rate is only an unsigned int. I guess in this case it is passed into the clock frame work which wants unsigned long, but do we need to keep it as an unsigned long? > + > + node = rpi_firmware_find_node(); > + if (!node) > + return -EINVAL; > + > + firmware = rpi_firmware_get(node); > + of_node_put(node); > + if (!firmware) > + return -EPROBE_DEFER; > + > hvs->core_clk = devm_clk_get(&pdev->dev, NULL); > if (IS_ERR(hvs->core_clk)) { > dev_err(&pdev->dev, "Couldn't get core clock\n"); > return PTR_ERR(hvs->core_clk); > } > > + max_rate = rpi_firmware_clk_get_max_rate(firmware, > + RPI_FIRMWARE_CORE_CLK_ID); > + rpi_firmware_put(firmware); > + if (max_rate >= 550000000) > + hvs->vc5_hdmi_enable_scrambling = true; > + > + hvs->max_core_rate = max_rate; I was going to query the reason for storing this value, but it's used when we get to patch 7/7. I won't quibble about having it as an unused value for 2 patches. If you're happy in both cases, then I'll send an R-b. Dave > ret = clk_prepare_enable(hvs->core_clk); > if (ret) { > dev_err(&pdev->dev, "Couldn't enable the core clock\n"); > > -- > b4 0.10.1