linux-kernel - Re: [PATCH] drm/rockchip: Add AFBC support

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Message-ID: <20190925092824.GA21018@arm.com>
Date:   Wed, 25 Sep 2019 09:28:26 +0000
From:   Ayan Halder <Ayan.Halder@....com>
To:     Andrzej Pietrasiewicz <andrzej.p@...labora.com>
CC:     Neil Armstrong <narmstrong@...libre.com>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>,
        David Airlie <airlied@...ux.ie>,
        Ezequiel Garcia <ezequiel@...labora.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Maxime Ripard <mripard@...nel.org>,
        "linux-rockchip@...ts.infradead.org" 
        <linux-rockchip@...ts.infradead.org>,
        "kernel@...labora.com" <kernel@...labora.com>,
        Sean Paul <sean@...rly.run>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>, nd <nd@....com>
Subject: Re: [PATCH] drm/rockchip: Add AFBC support

On Mon, Sep 23, 2019 at 05:34:14PM +0200, Andrzej Pietrasiewicz wrote:
> Dear All,
> 
> As a result of my mistake I've sent this patch with an incorrect SOB chain.
> Please kindly disregard this patch.
> 
> @Neil: thank you for your time you spent reviewing it and answering and I'm
> sorry it's to no effect.
> @Ezequiel, @Tomeu: I apologize to you. My mistake.
> 
> Regards,
> 
> Andrzej Pietrasiewicz
> 
> 
> W dniu 23.09.2019 o 15:53, Neil Armstrong pisze:
> >On 23/09/2019 14:20, Andrzej Pietrasiewicz wrote:
> >>From: Ezequiel Garcia <ezequiel@...labora.com>
> >>
> >>AFBC is a proprietary lossless image compression protocol and format.
> >>It helps reduce memory bandwidth of the graphics pipeline operations.
> >>This, in turn, improves power efficiency.
> >>
> >>Signed-off-by: Ezequiel Garcia <ezequiel@...labora.com>
> >>[locking improvements]
> >>Signed-off-by: Tomeu Vizoso <tomeu.vizoso@...labora.com>
> >>[squashing the above, commit message and Rockchip AFBC modifier]
> >>Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@...labora.com>
> >>---
> >>  drivers/gpu/drm/rockchip/rockchip_drm_fb.c  | 27 ++++++
> >>  drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 94 ++++++++++++++++++++-
> >>  drivers/gpu/drm/rockchip/rockchip_drm_vop.h | 12 +++
> >>  drivers/gpu/drm/rockchip/rockchip_vop_reg.c | 18 ++++
> >>  include/uapi/drm/drm_fourcc.h               |  3 +
> >>  5 files changed, 151 insertions(+), 3 deletions(-)
> >>
> >
> >[...]
> >
> >>diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
> >>index 3feeaa3f987a..ba6caf06c824 100644
> >>--- a/include/uapi/drm/drm_fourcc.h
> >>+++ b/include/uapi/drm/drm_fourcc.h
> >>@@ -742,6 +742,9 @@ extern "C" {
> >>   */
> >>  #define AFBC_FORMAT_MOD_BCH     (1ULL << 11)
> >>+#define AFBC_FORMAT_MOD_ROCKCHIP \
> >>+	(AFBC_FORMAT_MOD_BLOCK_SIZE_16x16 | AFBC_FORMAT_MOD_SPARSE)
> >
> >This define looks useless, what's Rockchip specific here ?
> >
Please reuse the existing AFBC modifiers.

Have a look at malidp_format_modifiers[] in which we have defined
the modifiers(for our driver) we are using.

In your case, it will be
DRM_FORMAT_MOD_ARM_AFBC(AFBC_FORMAT_MOD_BLOCK_SIZE_16x16|AFBC_FORMAT_MOD_SPARSE)

> >Neil
> >
> >>+
> >>  /*
> >>   * Allwinner tiled modifier
> >>   *
> >>
> >
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel@...ts.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

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