lkml.org 
[lkml]   [2020]   [May]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH v3 059/105] drm/vc4: crtc: Add BCM2711 pixelvalves
On Wed, May 27, 2020 at 8:50 AM Maxime Ripard <maxime@cerno.tech> wrote:
>
> The BCM2711 has 5 pixelvalves, so now that our driver is ready, let's add
> support for them.
>
> Signed-off-by: Maxime Ripard <maxime@cerno.tech>
> ---
> drivers/gpu/drm/vc4/vc4_crtc.c | 84 ++++++++++++++++++++++++++++++++++-
> drivers/gpu/drm/vc4/vc4_regs.h | 6 +++-
> 2 files changed, 88 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/vc4/vc4_crtc.c b/drivers/gpu/drm/vc4/vc4_crtc.c
> index 9efd7cb25590..a577ed8f929f 100644
> --- a/drivers/gpu/drm/vc4/vc4_crtc.c
> +++ b/drivers/gpu/drm/vc4/vc4_crtc.c
> @@ -229,6 +229,13 @@ static u32 vc4_get_fifo_full_level(struct vc4_crtc *vc4_crtc, u32 format)
> case PV_CONTROL_FORMAT_24:
> case PV_CONTROL_FORMAT_DSIV_24:
> default:
> + /*
> + * For some reason, the pixelvalve4 doesn't work with
> + * the usual formula and will only work with 32.
> + */
> + if (vc4_crtc->data->hvs_output == 5)
> + return 32;
> +
> return fifo_len_bytes - 3 * HVS_FIFO_LATENCY_PIX;
> }
> }
> @@ -237,9 +244,14 @@ static u32 vc4_crtc_get_fifo_full_level_bits(struct vc4_crtc *vc4_crtc,
> u32 format)
> {
> u32 level = vc4_get_fifo_full_level(vc4_crtc, format);
> + u32 ret = 0;
>
> - return VC4_SET_FIELD(level & 0x3f,
> - PV_CONTROL_FIFO_LEVEL);
> + if (level > 0x3f)
> + ret |= VC4_SET_FIELD((level >> 6) & 0x3,
> + PV5_CONTROL_FIFO_LEVEL_HIGH);
> +

I would drop the conditional here (ORing in zero is fine), and also
the & 3 because it would be good to get a warning if you picked a fifo
full level that doesn't fit in the field.

> + return ret | VC4_SET_FIELD(level & 0x3f,
> + PV_CONTROL_FIFO_LEVEL);
> }
>
> /*
> @@ -277,6 +289,8 @@ static void vc4_crtc_pixelvalve_reset(struct drm_crtc *crtc)
>
> static void vc4_crtc_config_pv(struct drm_crtc *crtc)
> {
> + struct drm_device *dev = crtc->dev;
> + struct vc4_dev *vc4 = to_vc4_dev(dev);
> struct drm_encoder *encoder = vc4_get_crtc_encoder(crtc);
> struct vc4_encoder *vc4_encoder = to_vc4_encoder(encoder);
> struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
> @@ -356,6 +370,10 @@ static void vc4_crtc_config_pv(struct drm_crtc *crtc)
> if (is_dsi)
> CRTC_WRITE(PV_HACT_ACT, mode->hdisplay * pixel_rep);
>
> + if (vc4->hvs->hvs5)
> + CRTC_WRITE(PV_MUX_CFG,
> + VC4_SET_FIELD(8, PV_MUX_CFG_RGB_PIXEL_MUX_MODE));

Can we get some #defines in the reg header instead of a magic value?

Other than that, r-b.

\
 
 \ /
  Last update: 2020-05-27 21:25    [W:0.630 / U:3.628 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site