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Date: Tue, 28 Jul 2020 14:12:55 +0100
From: Dave Stevenson <dave.stevenson@...pberrypi.com>
To: Maxime Ripard <maxime@...no.tech>
Cc: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
Eric Anholt <eric@...olt.net>,
DRI Development <dri-devel@...ts.freedesktop.org>,
linux-rpi-kernel@...ts.infradead.org,
bcm-kernel-feedback-list@...adcom.com,
linux-arm-kernel@...ts.infradead.org,
LKML <linux-kernel@...r.kernel.org>,
Tim Gover <tim.gover@...pberrypi.com>,
Phil Elwell <phil@...pberrypi.com>
Subject: Re: [PATCH v4 55/78] drm/vc4: hdmi: Add a CSC setup callback
Hi Maxime
On Wed, 8 Jul 2020 at 18:43, Maxime Ripard <maxime@...no.tech> wrote:
>
> Similarly to the previous patches, the CSC setup is slightly different in
> the BCM2711 than in the previous generations. Let's add a callback for it.
We've gained the set_timings callback in this patch as well as
csc_setup. Was that an accidental squash as we had them as independent
commits in v1.
Dave
> Signed-off-by: Maxime Ripard <maxime@...no.tech>
> ---
> drivers/gpu/drm/vc4/vc4_hdmi.c | 142 +++++++++++++++++++---------------
> drivers/gpu/drm/vc4/vc4_hdmi.h | 7 ++-
> 2 files changed, 89 insertions(+), 60 deletions(-)
>
> diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
> index 19897d6525ac..a50220bfd5dd 100644
> --- a/drivers/gpu/drm/vc4/vc4_hdmi.c
> +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
> @@ -334,12 +334,44 @@ static void vc4_hdmi_encoder_disable(struct drm_encoder *encoder)
> DRM_ERROR("Failed to release power domain: %d\n", ret);
> }
>
> -static void vc4_hdmi_encoder_enable(struct drm_encoder *encoder)
> +static void vc4_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi, bool enable)
> +{
> + u32 csc_ctl;
> +
> + csc_ctl = VC4_SET_FIELD(VC4_HD_CSC_CTL_ORDER_BGR,
> + VC4_HD_CSC_CTL_ORDER);
> +
> + if (enable) {
> + /* CEA VICs other than #1 requre limited range RGB
> + * output unless overridden by an AVI infoframe.
> + * Apply a colorspace conversion to squash 0-255 down
> + * to 16-235. The matrix here is:
> + *
> + * [ 0 0 0.8594 16]
> + * [ 0 0.8594 0 16]
> + * [ 0.8594 0 0 16]
> + * [ 0 0 0 1]
> + */
> + csc_ctl |= VC4_HD_CSC_CTL_ENABLE;
> + csc_ctl |= VC4_HD_CSC_CTL_RGB2YCC;
> + csc_ctl |= VC4_SET_FIELD(VC4_HD_CSC_CTL_MODE_CUSTOM,
> + VC4_HD_CSC_CTL_MODE);
> +
> + HDMI_WRITE(HDMI_CSC_12_11, (0x000 << 16) | 0x000);
> + HDMI_WRITE(HDMI_CSC_14_13, (0x100 << 16) | 0x6e0);
> + HDMI_WRITE(HDMI_CSC_22_21, (0x6e0 << 16) | 0x000);
> + HDMI_WRITE(HDMI_CSC_24_23, (0x100 << 16) | 0x000);
> + HDMI_WRITE(HDMI_CSC_32_31, (0x000 << 16) | 0x6e0);
> + HDMI_WRITE(HDMI_CSC_34_33, (0x100 << 16) | 0x000);
> + }
> +
> + /* The RGB order applies even when CSC is disabled. */
> + HDMI_WRITE(HDMI_CSC_CTL, csc_ctl);
> +}
> +
> +static void vc4_hdmi_set_timings(struct vc4_hdmi *vc4_hdmi,
> + struct drm_display_mode *mode)
> {
> - struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
> - struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
> - struct vc4_hdmi_encoder *vc4_encoder = &vc4_hdmi->encoder;
> - bool debug_dump_regs = false;
> 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;
> @@ -357,7 +389,41 @@ static void vc4_hdmi_encoder_enable(struct drm_encoder *encoder)
> mode->crtc_vsync_end -
> interlaced,
> VC4_HDMI_VERTB_VBP));
> - u32 csc_ctl;
> +
> + HDMI_WRITE(HDMI_HORZA,
> + (vsync_pos ? VC4_HDMI_HORZA_VPOS : 0) |
> + (hsync_pos ? VC4_HDMI_HORZA_HPOS : 0) |
> + VC4_SET_FIELD(mode->hdisplay * pixel_rep,
> + VC4_HDMI_HORZA_HAP));
> +
> + HDMI_WRITE(HDMI_HORZB,
> + VC4_SET_FIELD((mode->htotal -
> + mode->hsync_end) * pixel_rep,
> + VC4_HDMI_HORZB_HBP) |
> + VC4_SET_FIELD((mode->hsync_end -
> + mode->hsync_start) * pixel_rep,
> + VC4_HDMI_HORZB_HSP) |
> + VC4_SET_FIELD((mode->hsync_start -
> + mode->hdisplay) * pixel_rep,
> + VC4_HDMI_HORZB_HFP));
> +
> + HDMI_WRITE(HDMI_VERTA0, verta);
> + HDMI_WRITE(HDMI_VERTA1, verta);
> +
> + HDMI_WRITE(HDMI_VERTB0, vertb_even);
> + HDMI_WRITE(HDMI_VERTB1, vertb);
> +
> + HDMI_WRITE(HDMI_VID_CTL,
> + (vsync_pos ? 0 : VC4_HD_VID_CTL_VSYNC_LOW) |
> + (hsync_pos ? 0 : VC4_HD_VID_CTL_HSYNC_LOW));
> +}
> +
> +static void vc4_hdmi_encoder_enable(struct drm_encoder *encoder)
> +{
> + struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
> + struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
> + struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
> + bool debug_dump_regs = false;
> int ret;
>
> ret = pm_runtime_get_sync(&vc4_hdmi->pdev->dev);
> @@ -401,68 +467,22 @@ static void vc4_hdmi_encoder_enable(struct drm_encoder *encoder)
> VC4_HDMI_SCHEDULER_CONTROL_MANUAL_FORMAT |
> VC4_HDMI_SCHEDULER_CONTROL_IGNORE_VSYNC_PREDICTS);
>
> - HDMI_WRITE(HDMI_HORZA,
> - (vsync_pos ? VC4_HDMI_HORZA_VPOS : 0) |
> - (hsync_pos ? VC4_HDMI_HORZA_HPOS : 0) |
> - VC4_SET_FIELD(mode->hdisplay * pixel_rep,
> - VC4_HDMI_HORZA_HAP));
> -
> - HDMI_WRITE(HDMI_HORZB,
> - VC4_SET_FIELD((mode->htotal -
> - mode->hsync_end) * pixel_rep,
> - VC4_HDMI_HORZB_HBP) |
> - VC4_SET_FIELD((mode->hsync_end -
> - mode->hsync_start) * pixel_rep,
> - VC4_HDMI_HORZB_HSP) |
> - VC4_SET_FIELD((mode->hsync_start -
> - mode->hdisplay) * pixel_rep,
> - VC4_HDMI_HORZB_HFP));
> -
> - HDMI_WRITE(HDMI_VERTA0, verta);
> - HDMI_WRITE(HDMI_VERTA1, verta);
> -
> - HDMI_WRITE(HDMI_VERTB0, vertb_even);
> - HDMI_WRITE(HDMI_VERTB1, vertb);
> -
> - HDMI_WRITE(HDMI_VID_CTL,
> - (vsync_pos ? 0 : VC4_HD_VID_CTL_VSYNC_LOW) |
> - (hsync_pos ? 0 : VC4_HD_VID_CTL_HSYNC_LOW));
> -
> - csc_ctl = VC4_SET_FIELD(VC4_HD_CSC_CTL_ORDER_BGR,
> - VC4_HD_CSC_CTL_ORDER);
> + if (vc4_hdmi->variant->set_timings)
> + vc4_hdmi->variant->set_timings(vc4_hdmi, mode);
>
> if (vc4_encoder->hdmi_monitor &&
> - drm_default_rgb_quant_range(mode) ==
> - HDMI_QUANTIZATION_RANGE_LIMITED) {
> - /* CEA VICs other than #1 requre limited range RGB
> - * output unless overridden by an AVI infoframe.
> - * Apply a colorspace conversion to squash 0-255 down
> - * to 16-235. The matrix here is:
> - *
> - * [ 0 0 0.8594 16]
> - * [ 0 0.8594 0 16]
> - * [ 0.8594 0 0 16]
> - * [ 0 0 0 1]
> - */
> - csc_ctl |= VC4_HD_CSC_CTL_ENABLE;
> - csc_ctl |= VC4_HD_CSC_CTL_RGB2YCC;
> - csc_ctl |= VC4_SET_FIELD(VC4_HD_CSC_CTL_MODE_CUSTOM,
> - VC4_HD_CSC_CTL_MODE);
> + drm_default_rgb_quant_range(mode) == HDMI_QUANTIZATION_RANGE_LIMITED) {
> + if (vc4_hdmi->variant->csc_setup)
> + vc4_hdmi->variant->csc_setup(vc4_hdmi, true);
>
> - HDMI_WRITE(HDMI_CSC_12_11, (0x000 << 16) | 0x000);
> - HDMI_WRITE(HDMI_CSC_14_13, (0x100 << 16) | 0x6e0);
> - HDMI_WRITE(HDMI_CSC_22_21, (0x6e0 << 16) | 0x000);
> - HDMI_WRITE(HDMI_CSC_24_23, (0x100 << 16) | 0x000);
> - HDMI_WRITE(HDMI_CSC_32_31, (0x000 << 16) | 0x6e0);
> - HDMI_WRITE(HDMI_CSC_34_33, (0x100 << 16) | 0x000);
> vc4_encoder->limited_rgb_range = true;
> } else {
> + if (vc4_hdmi->variant->csc_setup)
> + vc4_hdmi->variant->csc_setup(vc4_hdmi, false);
> +
> vc4_encoder->limited_rgb_range = false;
> }
>
> - /* The RGB order applies even when CSC is disabled. */
> - HDMI_WRITE(HDMI_CSC_CTL, csc_ctl);
> -
> HDMI_WRITE(HDMI_FIFO_CTL, VC4_HDMI_FIFO_CTL_MASTER_SLAVE_N);
>
> if (debug_dump_regs) {
> @@ -1431,7 +1451,9 @@ static const struct vc4_hdmi_variant bcm2835_variant = {
> .num_registers = ARRAY_SIZE(vc4_hdmi_fields),
>
> .init_resources = vc4_hdmi_init_resources,
> + .csc_setup = vc4_hdmi_csc_setup,
> .reset = vc4_hdmi_reset,
> + .set_timings = vc4_hdmi_set_timings,
> .phy_init = vc4_hdmi_phy_init,
> .phy_disable = vc4_hdmi_phy_disable,
> .phy_rng_enable = vc4_hdmi_phy_rng_enable,
> diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.h b/drivers/gpu/drm/vc4/vc4_hdmi.h
> index 950accbc44e4..0c32dc46d289 100644
> --- a/drivers/gpu/drm/vc4/vc4_hdmi.h
> +++ b/drivers/gpu/drm/vc4/vc4_hdmi.h
> @@ -41,6 +41,13 @@ struct vc4_hdmi_variant {
> /* Callback to reset the HDMI block */
> void (*reset)(struct vc4_hdmi *vc4_hdmi);
>
> + /* Callback to enable / disable the CSC */
> + void (*csc_setup)(struct vc4_hdmi *vc4_hdmi, bool enable);
> +
> + /* Callback to configure the video timings in the HDMI block */
> + void (*set_timings)(struct vc4_hdmi *vc4_hdmi,
> + struct drm_display_mode *mode);
> +
> /* Callback to initialize the PHY according to the mode */
> void (*phy_init)(struct vc4_hdmi *vc4_hdmi,
> struct drm_display_mode *mode);
> --
> git-series 0.9.1
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