linux-kernel - Re: [PATCH 02/14] drm/bochs: split bochs_hw

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Message-ID: <22c8b837-7f6a-7f6e-b4b7-96cec7d41c02@gmail.com>
Date:   Wed, 19 Dec 2018 17:10:19 +0200
From:   Oleksandr Andrushchenko <andr2000@...il.com>
To:     Gerd Hoffmann <kraxel@...hat.com>, dri-devel@...ts.freedesktop.org,
        David Airlie <airlied@...hat.com>
Cc:     David Airlie <airlied@...ux.ie>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:DRM DRIVER FOR BOCHS VIRTUAL GPU" 
        <virtualization@...ts.linux-foundation.org>
Subject: Re: [PATCH 02/14] drm/bochs: split bochs_hw_setmode

Hi, Gerd!

On 12/19/18 1:51 PM, Gerd Hoffmann wrote:
> Create a separate bochs_hw_setformat function to configure
> the framebuffer format (actually just the byteorder).
>
> Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>
> ---
>   drivers/gpu/drm/bochs/bochs.h     |  5 +++--
>   drivers/gpu/drm/bochs/bochs_hw.c  | 19 ++++++++++++-------
>   drivers/gpu/drm/bochs/bochs_kms.c |  3 ++-
>   3 files changed, 17 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/bochs/bochs.h b/drivers/gpu/drm/bochs/bochs.h
> index fb38c8b857..4dc1b6384e 100644
> --- a/drivers/gpu/drm/bochs/bochs.h
> +++ b/drivers/gpu/drm/bochs/bochs.h
> @@ -121,8 +121,9 @@ int bochs_hw_init(struct drm_device *dev);
>   void bochs_hw_fini(struct drm_device *dev);
>   
>   void bochs_hw_setmode(struct bochs_device *bochs,
> -		      struct drm_display_mode *mode,
> -		      const struct drm_format_info *format);
> +		      struct drm_display_mode *mode);
> +void bochs_hw_setformat(struct bochs_device *bochs,
> +			const struct drm_format_info *format);
>   void bochs_hw_setbase(struct bochs_device *bochs,
>   		      int x, int y, u64 addr);
>   int bochs_hw_load_edid(struct bochs_device *bochs);
> diff --git a/drivers/gpu/drm/bochs/bochs_hw.c b/drivers/gpu/drm/bochs/bochs_hw.c
> index c90a0d492f..bbb251fc78 100644
> --- a/drivers/gpu/drm/bochs/bochs_hw.c
> +++ b/drivers/gpu/drm/bochs/bochs_hw.c
> @@ -197,8 +197,7 @@ void bochs_hw_fini(struct drm_device *dev)
>   }
>   
>   void bochs_hw_setmode(struct bochs_device *bochs,
> -		      struct drm_display_mode *mode,
> -		      const struct drm_format_info *format)
> +		      struct drm_display_mode *mode)
>   {
>   	bochs->xres = mode->hdisplay;
>   	bochs->yres = mode->vdisplay;
> @@ -206,12 +205,8 @@ void bochs_hw_setmode(struct bochs_device *bochs,
>   	bochs->stride = mode->hdisplay * (bochs->bpp / 8);
>   	bochs->yres_virtual = bochs->fb_size / bochs->stride;
>   
> -	DRM_DEBUG_DRIVER("%dx%d @ %d bpp, format %c%c%c%c, vy %d\n",
> +	DRM_DEBUG_DRIVER("%dx%d @ %d bpp, vy %d\n",
>   			 bochs->xres, bochs->yres, bochs->bpp,
> -			 (format->format >>  0) & 0xff,
> -			 (format->format >>  8) & 0xff,
> -			 (format->format >> 16) & 0xff,
> -			 (format->format >> 24) & 0xff,
>   			 bochs->yres_virtual);
>   
>   	bochs_vga_writeb(bochs, 0x3c0, 0x20); /* unblank */
> @@ -229,6 +224,16 @@ void bochs_hw_setmode(struct bochs_device *bochs,
>   
>   	bochs_dispi_write(bochs, VBE_DISPI_INDEX_ENABLE,
>   			  VBE_DISPI_ENABLED | VBE_DISPI_LFB_ENABLED);
> +}
> +
> +void bochs_hw_setformat(struct bochs_device *bochs,
> +			const struct drm_format_info *format)
> +{
> +	DRM_DEBUG_DRIVER("format %c%c%c%c\n",
> +			 (format->format >>  0) & 0xff,
> +			 (format->format >>  8) & 0xff,
> +			 (format->format >> 16) & 0xff,
> +			 (format->format >> 24) & 0xff);
>   
>   	switch (format->format) {
>   	case DRM_FORMAT_XRGB8888:
> diff --git a/drivers/gpu/drm/bochs/bochs_kms.c b/drivers/gpu/drm/bochs/bochs_kms.c
> index c8ce54498d..f7e6d1a9b3 100644
> --- a/drivers/gpu/drm/bochs/bochs_kms.c
> +++ b/drivers/gpu/drm/bochs/bochs_kms.c
> @@ -80,7 +80,8 @@ static int bochs_crtc_mode_set(struct drm_crtc *crtc,
>   	if (WARN_ON(crtc->primary->fb == NULL))
>   		return -EINVAL;
>   
> -	bochs_hw_setmode(bochs, mode, crtc->primary->fb->format);
> +	bochs_hw_setmode(bochs, mode);
> +	bochs_hw_setformat(bochs, crtc->primary->fb->format);

I was about to suggest that you go away from direct crtc->primary

use, but it seems this code goes away in this series

>   	bochs_crtc_mode_set_base(crtc, x, y, old_fb);
>   	return 0;
>   }
Reviewed-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@...m.com>