[RFC 00/21] drm: fb emulation: Step 3: Remove FB_KMS_HELPER config from drivers

[RFC 00/21] drm: fb emulation: Step 3: Remove FB_KMS_HELPER config from drivers

[Archit Taneja]

With the top level DRM_FBDEV_EMULATION option, drivers don't need to
select DRM_FB_KMS_HELPER or other FB related config options in the
driver.

Even if FBDEV_EMULATION isn't select, the stubbed out versions of
the drm_fb_helper functions will be called.

There are some drivers which still need some FB stuff even after
these changes. They are qxl, udl and nouveau. These are handled a bit
differently compared to the other patches.

Archit Taneja (21):
  drm/cirrus: Remove FB_KMS_HELPER and FB related config options
  drm/rockchip: Remove FB_KMS_HELPER and FB related config options
  drm/armada: Remove FB_KMS_HELPER and FB related config options
  drm/ast: Remove FB_KMS_HELPER and FB related config options
  drm/omap: Remove FB_KMS_HELPER and FB related config options
  drm/exynos: Remove FB_KMS_HELPER and FB related config options
  drm/gma500: Remove FB_KMS_HELPER and FB related config options
  drm/mgag200: Remove FB_KMS_HELPER and FB related config options
  drm/radeon: Remove FB_KMS_HELPER and FB related config options
  drm/qxl: Remove FB_KMS_HELPER and FB related config options
  drm/nouveau: Remove FB_KMS_HELPER and FB related config options
  drm/udl: Remove FB_KMS_HELPER and FB related config options
  drm/bochs: Remove FB_KMS_HELPER and FB related config options
  drm/amdgpu: Remove FB_KMS_HELPER and FB related config options
  drm/virtio: Remove FB_KMS_HELPER and FB related config options
  drm/fb_cma_helper: Remove FB_KMS_HELPER and FB related config options
  drm/atmel-hlcdc: Remove FB_KMS_HELPER config option
  drm/imx: Remove FB_KMS_HELPER config option
  drm/rcar-du: Remove FB_KMS_HELPER config option
  drm/shmobile: Remove FB_KMS_HELPER config option
  drm/tilcdc: Remove FB_KMS_HELPER config option

 drivers/gpu/drm/Kconfig             |  4 ----
 drivers/gpu/drm/amd/amdgpu/Kconfig  |  4 ----
 drivers/gpu/drm/armada/Kconfig      |  4 ----
 drivers/gpu/drm/ast/Kconfig         |  4 ----
 drivers/gpu/drm/atmel-hlcdc/Kconfig |  1 -
 drivers/gpu/drm/bochs/Kconfig       |  4 ----
 drivers/gpu/drm/cirrus/Kconfig      |  4 ----
 drivers/gpu/drm/exynos/Kconfig      |  6 ------
 drivers/gpu/drm/gma500/Kconfig      |  4 ----
 drivers/gpu/drm/imx/Kconfig         |  1 -
 drivers/gpu/drm/mgag200/Kconfig     |  4 ----
 drivers/gpu/drm/nouveau/Kconfig     |  7 +------
 drivers/gpu/drm/omapdrm/Kconfig     |  5 -----
 drivers/gpu/drm/qxl/Kconfig         |  5 -----
 drivers/gpu/drm/qxl/qxl_fb.c        |  4 ++++
 drivers/gpu/drm/radeon/Kconfig      |  4 ----
 drivers/gpu/drm/rcar-du/Kconfig     |  1 -
 drivers/gpu/drm/rockchip/Kconfig    |  4 ----
 drivers/gpu/drm/shmobile/Kconfig    |  1 -
 drivers/gpu/drm/tilcdc/Kconfig      |  1 -
 drivers/gpu/drm/udl/Kconfig         |  5 -----
 drivers/gpu/drm/udl/udl_fb.c        | 10 ++++++++++
 drivers/gpu/drm/virtio/Kconfig      |  4 ----
 23 files changed, 15 insertions(+), 76 deletions(-)

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[RFC 01/21] drm/cirrus: Remove FB_KMS_HELPER and FB related config options

[Archit Taneja]

Remove FB_* config options since the driver doesn't call any fbdev
functions directly.

Remove FB_KMS_HELPER as this would now be selected by the top level
FBDEV_EMULATION config option. If the fbdev emulation isn't selected,
the drm_fb_helper functions will be stubbed out.

Cc: Thierry Reding <treding@nvidia.com>
Cc: Zach Reizner <zachr@google.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Fabian Frederick <fabf@skynet.be>

Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/cirrus/Kconfig | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/cirrus/Kconfig b/drivers/gpu/drm/cirrus/Kconfig
index 9864559..04b3c16 100644
--- a/drivers/gpu/drm/cirrus/Kconfig
+++ b/drivers/gpu/drm/cirrus/Kconfig
@@ -1,11 +1,7 @@
 config DRM_CIRRUS_QEMU
 	tristate "Cirrus driver for QEMU emulated device"
 	depends on DRM && PCI
-	select FB_SYS_FILLRECT
-	select FB_SYS_COPYAREA
-	select FB_SYS_IMAGEBLIT
 	select DRM_KMS_HELPER
-	select DRM_KMS_FB_HELPER
 	select DRM_TTM
 	help
 	 This is a KMS driver for emulated cirrus device in qemu.
-- 
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[RFC 02/21] drm/rockchip: Remove FB_KMS_HELPER and FB related config options

[Archit Taneja]

Remove FB_* config options since the driver doesn't call any fbdev
functions directly.

Remove FB_KMS_HELPER as this would now be selected by the top level
FBDEV_EMULATION config option. If the fbdev emulation isn't selected,
the drm_fb_helper functions will be stubbed out.

Cc: Mark Yao <mark.yao@rock-chips.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Daniel Kurtz <djkurtz@chromium.org>

Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/rockchip/Kconfig | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/Kconfig b/drivers/gpu/drm/rockchip/Kconfig
index 35215f6..65d5fdd 100644
--- a/drivers/gpu/drm/rockchip/Kconfig
+++ b/drivers/gpu/drm/rockchip/Kconfig
@@ -3,11 +3,7 @@ config DRM_ROCKCHIP
 	depends on DRM && ROCKCHIP_IOMMU
 	depends on RESET_CONTROLLER
 	select DRM_KMS_HELPER
-	select DRM_KMS_FB_HELPER
 	select DRM_PANEL
-	select FB_CFB_FILLRECT
-	select FB_CFB_COPYAREA
-	select FB_CFB_IMAGEBLIT
 	select VIDEOMODE_HELPERS
 	help
 	  Choose this option if you have a Rockchip soc chipset.
-- 
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[RFC 03/21] drm/armada: Remove FB_KMS_HELPER and FB related config options

[Archit Taneja]

Remove FB_* config options since the driver doesn't call any fbdev
functions directly.

Remove FB_KMS_HELPER as this would now be selected by the top level
FBDEV_EMULATION config option. If the fbdev emulation isn't selected,
the drm_fb_helper functions will be stubbed out.

Cc: Russell King <rmk+kernel@arm.linux.org.uk>

Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/armada/Kconfig | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/armada/Kconfig b/drivers/gpu/drm/armada/Kconfig
index 50ae88a..c31454d 100644
--- a/drivers/gpu/drm/armada/Kconfig
+++ b/drivers/gpu/drm/armada/Kconfig
@@ -1,11 +1,7 @@
 config DRM_ARMADA
 	tristate "DRM support for Marvell Armada SoCs"
 	depends on DRM && HAVE_CLK && ARM
-	select FB_CFB_FILLRECT
-	select FB_CFB_COPYAREA
-	select FB_CFB_IMAGEBLIT
 	select DRM_KMS_HELPER
-	select DRM_KMS_FB_HELPER
 	help
 	  Support the "LCD" controllers found on the Marvell Armada 510
 	  devices.  There are two controllers on the device, each controller
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[RFC 04/21] drm/ast: Remove FB_KMS_HELPER and FB related config options

[Archit Taneja]

Remove FB_* config options since the driver doesn't call any fbdev
functions directly.

Remove FB_KMS_HELPER as this would now be selected by the top level
FBDEV_EMULATION config option. If the fbdev emulation isn't selected,
the drm_fb_helper functions will be stubbed out.

Cc: David Airlie <airlied@linux.ie>
Cc: "Y.C. Chen" <yc_chen@aspeedtech.com>
Cc: Alex Deucher <alexander.deucher@amd.com>

Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/ast/Kconfig | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/ast/Kconfig b/drivers/gpu/drm/ast/Kconfig
index 8a784c4..15f6ce7 100644
--- a/drivers/gpu/drm/ast/Kconfig
+++ b/drivers/gpu/drm/ast/Kconfig
@@ -2,11 +2,7 @@ config DRM_AST
 	tristate "AST server chips"
 	depends on DRM && PCI
 	select DRM_TTM
-	select FB_SYS_COPYAREA
-	select FB_SYS_FILLRECT
-	select FB_SYS_IMAGEBLIT
 	select DRM_KMS_HELPER
-	select DRM_KMS_FB_HELPER
 	select DRM_TTM
 	help
 	 Say yes for experimental AST GPU driver. Do not enable
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[RFC 05/21] drm/omap: Remove FB_KMS_HELPER and FB related config options

[Archit Taneja]

Remove FB_* config options since the driver doesn't call any fbdev
functions directly.

Remove FB_KMS_HELPER as this would now be selected by the top level
FBDEV_EMULATION config option. If the fbdev emulation isn't selected,
the drm_fb_helper functions will be stubbed out.

Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/omapdrm/Kconfig | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/Kconfig b/drivers/gpu/drm/omapdrm/Kconfig
index 6c220cd..340ece7 100644
--- a/drivers/gpu/drm/omapdrm/Kconfig
+++ b/drivers/gpu/drm/omapdrm/Kconfig
@@ -5,11 +5,6 @@ config DRM_OMAP
 	depends on ARCH_OMAP2PLUS || ARCH_MULTIPLATFORM
 	depends on OMAP2_DSS
 	select DRM_KMS_HELPER
-	select DRM_KMS_FB_HELPER
-	select FB_SYS_FILLRECT
-	select FB_SYS_COPYAREA
-	select FB_SYS_IMAGEBLIT
-	select FB_SYS_FOPS
 	default n
 	help
 	  DRM display driver for OMAP2/3/4 based boards.
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Re: [RFC 05/21] drm/omap: Remove FB_KMS_HELPER and FB related config options

[Laurent Pinchart]

Hi Archit,

Thank you for the patch.

On Monday 13 July 2015 12:13:52 Archit Taneja wrote:
> Remove FB_* config options since the driver doesn't call any fbdev
> functions directly.
> 
> Remove FB_KMS_HELPER as this would now be selected by the top level
> FBDEV_EMULATION config option. If the fbdev emulation isn't selected,
> the drm_fb_helper functions will be stubbed out.
> 
> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> 
> Signed-off-by: Archit Taneja <architt@codeaurora.org>

I like that, one step closer to removing fbdev altogether (even if there are 
many steps left) :-)

Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
>  drivers/gpu/drm/omapdrm/Kconfig | 5 -----
>  1 file changed, 5 deletions(-)
> 
> diff --git a/drivers/gpu/drm/omapdrm/Kconfig
> b/drivers/gpu/drm/omapdrm/Kconfig index 6c220cd..340ece7 100644
> --- a/drivers/gpu/drm/omapdrm/Kconfig
> +++ b/drivers/gpu/drm/omapdrm/Kconfig
> @@ -5,11 +5,6 @@ config DRM_OMAP
>  	depends on ARCH_OMAP2PLUS || ARCH_MULTIPLATFORM
>  	depends on OMAP2_DSS
>  	select DRM_KMS_HELPER
> -	select DRM_KMS_FB_HELPER
> -	select FB_SYS_FILLRECT
> -	select FB_SYS_COPYAREA
> -	select FB_SYS_IMAGEBLIT
> -	select FB_SYS_FOPS
>  	default n
>  	help
>  	  DRM display driver for OMAP2/3/4 based boards.

-- 
Regards,

Laurent Pinchart

Re: [RFC 05/21] drm/omap: Remove FB_KMS_HELPER and FB related config options

[Archit Taneja]

On 08/01/2015 03:32 PM, Laurent Pinchart wrote:
> Hi Archit,
>
> Thank you for the patch.
>
> On Monday 13 July 2015 12:13:52 Archit Taneja wrote:
>> Remove FB_* config options since the driver doesn't call any fbdev
>> functions directly.
>>
>> Remove FB_KMS_HELPER as this would now be selected by the top level
>> FBDEV_EMULATION config option. If the fbdev emulation isn't selected,
>> the drm_fb_helper functions will be stubbed out.
>>
>> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
>> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
>>
>> Signed-off-by: Archit Taneja <architt@codeaurora.org>
>
> I like that, one step closer to removing fbdev altogether (even if there are
> many steps left) :-)
>
> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

Thanks for the Acks. I'll use them when I post again.

Archit

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[RFC 06/21] drm/exynos: Remove FB_KMS_HELPER and FB related config options

[Archit Taneja]

Remove FB_* config options since the driver doesn't call any fbdev
functions directly.

Remove FB_KMS_HELPER as this would now be selected by the top level
FBDEV_EMULATION config option. If the fbdev emulation isn't selected,
the drm_fb_helper functions will be stubbed out.

Cc: Inki Dae <inki.dae@samsung.com>
Cc: Joonyoung Shim <jy0922.shim@samsung.com>
Cc: Seung-Woo Kim <sw0312.kim@samsung.com>

Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/exynos/Kconfig | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/drivers/gpu/drm/exynos/Kconfig b/drivers/gpu/drm/exynos/Kconfig
index 43003c4..d253007 100644
--- a/drivers/gpu/drm/exynos/Kconfig
+++ b/drivers/gpu/drm/exynos/Kconfig
@@ -2,10 +2,6 @@ config DRM_EXYNOS
 	tristate "DRM Support for Samsung SoC EXYNOS Series"
 	depends on OF && DRM && (PLAT_SAMSUNG || ARCH_MULTIPLATFORM)
 	select DRM_KMS_HELPER
-	select DRM_KMS_FB_HELPER
-	select FB_CFB_FILLRECT
-	select FB_CFB_COPYAREA
-	select FB_CFB_IMAGEBLIT
 	select VIDEOMODE_HELPERS
 	help
 	  Choose this option if you have a Samsung SoC EXYNOS chipset.
@@ -19,7 +15,6 @@ config DRM_EXYNOS_IOMMU
 config DRM_EXYNOS_FIMD
 	bool "Exynos DRM FIMD"
 	depends on DRM_EXYNOS && !FB_S3C
-	select FB_MODE_HELPERS
 	select MFD_SYSCON
 	help
 	  Choose this option if you want to use Exynos FIMD for DRM.
@@ -33,7 +28,6 @@ config DRM_EXYNOS5433_DECON
 config DRM_EXYNOS7_DECON
 	bool "Exynos7 DRM DECON"
 	depends on DRM_EXYNOS && !FB_S3C
-	select FB_MODE_HELPERS
 	help
 	  Choose this option if you want to use Exynos DECON for DRM.
 
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[RFC 07/21] drm/gma500: Remove FB_KMS_HELPER and FB related config options

[Archit Taneja]

Remove FB_* config options since the driver doesn't call any fbdev
functions directly.

Remove FB_KMS_HELPER as this would now be selected by the top level
FBDEV_EMULATION config option. If the fbdev emulation isn't selected,
the drm_fb_helper functions will be stubbed out.

Cc:Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>

Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/gma500/Kconfig | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/gma500/Kconfig b/drivers/gpu/drm/gma500/Kconfig
index 17f928e..8906d67 100644
--- a/drivers/gpu/drm/gma500/Kconfig
+++ b/drivers/gpu/drm/gma500/Kconfig
@@ -1,11 +1,7 @@
 config DRM_GMA500
 	tristate "Intel GMA5/600 KMS Framebuffer"
 	depends on DRM && PCI && X86
-	select FB_CFB_COPYAREA
-	select FB_CFB_FILLRECT
-	select FB_CFB_IMAGEBLIT
 	select DRM_KMS_HELPER
-	select DRM_KMS_FB_HELPER
 	select DRM_TTM
 	# GMA500 depends on ACPI_VIDEO when ACPI is enabled, just like i915
 	select ACPI_VIDEO if ACPI
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[RFC 08/21] drm/mgag200: Remove FB_KMS_HELPER and FB related config options

[Archit Taneja]

Remove FB_* config options since the driver doesn't call any fbdev
functions directly.

Remove FB_KMS_HELPER as this would now be selected by the top level
FBDEV_EMULATION config option. If the fbdev emulation isn't selected,
the drm_fb_helper functions will be stubbed out.

Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: David Airlie <airlied@linux.ie>
Cc: Alex Deucher <alexander.deucher@amd.com>

Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/mgag200/Kconfig | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/mgag200/Kconfig b/drivers/gpu/drm/mgag200/Kconfig
index 3a1c5fb..520e5e6 100644
--- a/drivers/gpu/drm/mgag200/Kconfig
+++ b/drivers/gpu/drm/mgag200/Kconfig
@@ -1,11 +1,7 @@
 config DRM_MGAG200
 	tristate "Kernel modesetting driver for MGA G200 server engines"
 	depends on DRM && PCI
-	select FB_SYS_FILLRECT
-	select FB_SYS_COPYAREA
-	select FB_SYS_IMAGEBLIT
 	select DRM_KMS_HELPER
-	select DRM_KMS_FB_HELPER
 	select DRM_TTM
 	help
 	 This is a KMS driver for the MGA G200 server chips, it
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[RFC 09/21] drm/radeon: Remove FB_KMS_HELPER and FB related config options

[Archit Taneja]

Remove FB_* config options since the driver doesn't call any fbdev
functions directly.

Remove FB_KMS_HELPER as this would now be selected by the top level
FBDEV_EMULATION config option. If the fbdev emulation isn't selected,
the drm_fb_helper functions will be stubbed out.

Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>

Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/radeon/Kconfig | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/radeon/Kconfig b/drivers/gpu/drm/radeon/Kconfig
index 82c623b..3f1af32 100644
--- a/drivers/gpu/drm/radeon/Kconfig
+++ b/drivers/gpu/drm/radeon/Kconfig
@@ -1,12 +1,8 @@
 config DRM_RADEON
 	tristate "ATI Radeon"
 	depends on DRM && PCI
-	select FB_CFB_FILLRECT
-	select FB_CFB_COPYAREA
-	select FB_CFB_IMAGEBLIT
 	select FW_LOADER
         select DRM_KMS_HELPER
-	select DRM_KMS_FB_HELPER
         select DRM_TTM
 	select POWER_SUPPLY
 	select HWMON
-- 
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[RFC 10/21] drm/qxl: Remove FB_KMS_HELPER and FB related config options

[Archit Taneja]

Remove FB_* config options since the driver doesn't call any fbdev
functions directly.

Remove FB_KMS_HELPER as this would now be selected by the top level
FBDEV_EMULATION config option. If the fbdev emulation isn't selected,
the drm_fb_helper functions will be stubbed out.

The code relying on DEFERRED_IO can't be stubbed out using drm_fb_helper
functions. This is because the deferred io members in fbdev core structs
are defined based on whether FB_DEFERRED_IO is defined or not.

For now, wrap around deferred io code with an #ifdef check for
CONFIG_DEFERRED_IO. We could consider creating stub fb helper functions
here, but this would require some changes in the core fbdev structs.

Cc: David Airlie <airlied@linux.ie>
Cc: Frediano Ziglio <fziglio@redhat.com>
Cc: Maarten Lankhorst <maarten.lankhorst@canonical.com>

Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/qxl/Kconfig  | 5 -----
 drivers/gpu/drm/qxl/qxl_fb.c | 4 ++++
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/qxl/Kconfig b/drivers/gpu/drm/qxl/Kconfig
index 38c2bb7..da45b11 100644
--- a/drivers/gpu/drm/qxl/Kconfig
+++ b/drivers/gpu/drm/qxl/Kconfig
@@ -1,12 +1,7 @@
 config DRM_QXL
 	tristate "QXL virtual GPU"
 	depends on DRM && PCI
-	select FB_SYS_FILLRECT
-	select FB_SYS_COPYAREA
-	select FB_SYS_IMAGEBLIT
-	select FB_DEFERRED_IO
 	select DRM_KMS_HELPER
-	select DRM_KMS_FB_HELPER
 	select DRM_TTM
 	select CRC32
 	help
diff --git a/drivers/gpu/drm/qxl/qxl_fb.c b/drivers/gpu/drm/qxl/qxl_fb.c
index 41c422f..9391dfe 100644
--- a/drivers/gpu/drm/qxl/qxl_fb.c
+++ b/drivers/gpu/drm/qxl/qxl_fb.c
@@ -163,6 +163,7 @@ static void qxl_dirty_update(struct qxl_fbdev *qfbdev,
 	schedule_work(&qdev->fb_work);
 }
 
+#ifdef CONFIG_FB_DEFERRED_IO
 static void qxl_deferred_io(struct fb_info *info,
 			    struct list_head *pagelist)
 {
@@ -191,6 +192,7 @@ static struct fb_deferred_io qxl_defio = {
 	.delay		= QXL_DIRTY_DELAY,
 	.deferred_io	= qxl_deferred_io,
 };
+#endif
 
 static void qxl_fb_fillrect(struct fb_info *info,
 			    const struct fb_fillrect *rect)
@@ -420,8 +422,10 @@ static int qxlfb_create(struct qxl_fbdev *qfbdev,
 		goto out_destroy_fbi;
 	}
 
+#ifdef CONFIG_FB_DEFERRED_IO
 	info->fbdefio = &qxl_defio;
 	fb_deferred_io_init(info);
+#endif
 
 	qdev->fbdev_info = info;
 	qdev->fbdev_qfb = &qfbdev->qfb;
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Re: [RFC 10/21] drm/qxl: Remove FB_KMS_HELPER and FB related config options

[Daniel Vetter]

On Mon, Jul 13, 2015 at 12:13:57PM +0530, Archit Taneja wrote:
> Remove FB_* config options since the driver doesn't call any fbdev
> functions directly.
> 
> Remove FB_KMS_HELPER as this would now be selected by the top level
> FBDEV_EMULATION config option. If the fbdev emulation isn't selected,
> the drm_fb_helper functions will be stubbed out.
> 
> The code relying on DEFERRED_IO can't be stubbed out using drm_fb_helper
> functions. This is because the deferred io members in fbdev core structs
> are defined based on whether FB_DEFERRED_IO is defined or not.
> 
> For now, wrap around deferred io code with an #ifdef check for
> CONFIG_DEFERRED_IO. We could consider creating stub fb helper functions
> here, but this would require some changes in the core fbdev structs.

Yeah if more drivers grow a ->dirty callback that does something we'd
probably want to pull all that code out of qxl/udl into core fbdev. i915
now also has a dirty callback, but for fbcon we're going with a slightly
different options: Since all our frontbuffer dirtying are for optional
features we just disable them right now.

Anyway just an idea for future patches when someone works in this area.
For now I think we simply have to select the relevant options if FBDEV
emulation is enabled.
> 
> Cc: David Airlie <airlied@linux.ie>
> Cc: Frediano Ziglio <fziglio@redhat.com>
> Cc: Maarten Lankhorst <maarten.lankhorst@canonical.com>
> 
> Signed-off-by: Archit Taneja <architt@codeaurora.org>
> ---
>  drivers/gpu/drm/qxl/Kconfig  | 5 -----
>  drivers/gpu/drm/qxl/qxl_fb.c | 4 ++++
>  2 files changed, 4 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/gpu/drm/qxl/Kconfig b/drivers/gpu/drm/qxl/Kconfig
> index 38c2bb7..da45b11 100644
> --- a/drivers/gpu/drm/qxl/Kconfig
> +++ b/drivers/gpu/drm/qxl/Kconfig
> @@ -1,12 +1,7 @@
>  config DRM_QXL
>  	tristate "QXL virtual GPU"
>  	depends on DRM && PCI
> -	select FB_SYS_FILLRECT
> -	select FB_SYS_COPYAREA
> -	select FB_SYS_IMAGEBLIT
> -	select FB_DEFERRED_IO

I.e.
	select FB_DEFERRED_IO if DRM_FBDEV_EMULATION

>  	select DRM_KMS_HELPER
> -	select DRM_KMS_FB_HELPER
>  	select DRM_TTM
>  	select CRC32
>  	help
> diff --git a/drivers/gpu/drm/qxl/qxl_fb.c b/drivers/gpu/drm/qxl/qxl_fb.c
> index 41c422f..9391dfe 100644
> --- a/drivers/gpu/drm/qxl/qxl_fb.c
> +++ b/drivers/gpu/drm/qxl/qxl_fb.c
> @@ -163,6 +163,7 @@ static void qxl_dirty_update(struct qxl_fbdev *qfbdev,
>  	schedule_work(&qdev->fb_work);
>  }
>  
> +#ifdef CONFIG_FB_DEFERRED_IO

and using CONFIG_DMR_FBDEV_EMULATION here instead. Same for udl changes.
-Daniel

>  static void qxl_deferred_io(struct fb_info *info,
>  			    struct list_head *pagelist)
>  {
> @@ -191,6 +192,7 @@ static struct fb_deferred_io qxl_defio = {
>  	.delay		= QXL_DIRTY_DELAY,
>  	.deferred_io	= qxl_deferred_io,
>  };
> +#endif
>  
>  static void qxl_fb_fillrect(struct fb_info *info,
>  			    const struct fb_fillrect *rect)
> @@ -420,8 +422,10 @@ static int qxlfb_create(struct qxl_fbdev *qfbdev,
>  		goto out_destroy_fbi;
>  	}
>  
> +#ifdef CONFIG_FB_DEFERRED_IO
>  	info->fbdefio = &qxl_defio;
>  	fb_deferred_io_init(info);
> +#endif
>  
>  	qdev->fbdev_info = info;
>  	qdev->fbdev_qfb = &qfbdev->qfb;
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> hosted by The Linux Foundation
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

[RFC 11/21] drm/nouveau: Remove FB_KMS_HELPER and FB related config options

[Archit Taneja]

Remove FB_* config options since the driver doesn't call any fbdev
functions directly.

Remove FB_KMS_HELPER as this would now be selected by the top level
FBDEV_EMULATION config option. If the fbdev emulation isn't selected,
the drm_fb_helper functions will be stubbed out.

Removing FB_BACKLIGHT gives dependency issues. For now, make the driver
depend on DRM_FBDEV_EMULATION config option. We should remove this once
the driver can work without FB_BACKLIGHT too.

Cc: David Airlie <airlied@linux.ie>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Alexandre Courbot <acourbot@nvidia.com>

Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/nouveau/Kconfig | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/Kconfig b/drivers/gpu/drm/nouveau/Kconfig
index 5ab13e7..f7e275a6 100644
--- a/drivers/gpu/drm/nouveau/Kconfig
+++ b/drivers/gpu/drm/nouveau/Kconfig
@@ -1,15 +1,10 @@
 config DRM_NOUVEAU
 	tristate "Nouveau (NVIDIA) cards"
 	depends on DRM && PCI
+	depends on DRM_FBDEV_EMULATION
         select FW_LOADER
 	select DRM_KMS_HELPER
-	select DRM_KMS_FB_HELPER
 	select DRM_TTM
-	select FB_CFB_FILLRECT
-	select FB_CFB_COPYAREA
-	select FB_CFB_IMAGEBLIT
-	select FB
-	select FRAMEBUFFER_CONSOLE if !EXPERT
 	select FB_BACKLIGHT if DRM_NOUVEAU_BACKLIGHT
 	select ACPI_VIDEO if ACPI && X86 && BACKLIGHT_CLASS_DEVICE && INPUT
 	select X86_PLATFORM_DEVICES if ACPI && X86
-- 
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hosted by The Linux Foundation

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[RFC 12/21] drm/udl: Remove FB_KMS_HELPER and FB related config options

[Archit Taneja]

Remove FB_* config options since the driver doesn't call any fbdev
functions directly.

Remove FB_KMS_HELPER as this would now be selected by the top level
FBDEV_EMULATION config option. If the fbdev emulation isn't selected,
the drm_fb_helper functions will be stubbed out.

The code relying on DEFERRED_IO can't be stubbed out using drm_fb_helper
functions. This is because the deferred io members in fbdev core structs
are defined based on whether FB_DEFERRED_IO is defined or not.

For now, wrap around deferred io code with an #ifdef check for
CONFIG_DEFERRED_IO. We could consider creating stub fb helper functions
here, but this would require some changes in the core fbdev structs.

Cc: David Airlie <airlied@linux.ie>
Cc: Haixia Shi <hshi@chromium.org>
Cc: "Stéphane Marchesin" <marcheu@chromium.org>

Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/udl/Kconfig  |  5 -----
 drivers/gpu/drm/udl/udl_fb.c | 10 ++++++++++
 2 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/udl/Kconfig b/drivers/gpu/drm/udl/Kconfig
index 613ab06..1616ec4 100644
--- a/drivers/gpu/drm/udl/Kconfig
+++ b/drivers/gpu/drm/udl/Kconfig
@@ -4,12 +4,7 @@ config DRM_UDL
 	depends on USB_SUPPORT
 	depends on USB_ARCH_HAS_HCD
 	select USB
-	select FB_SYS_FILLRECT
-	select FB_SYS_COPYAREA
-	select FB_SYS_IMAGEBLIT
-	select FB_DEFERRED_IO
 	select DRM_KMS_HELPER
-        select DRM_KMS_FB_HELPER
 	help
 	  This is a KMS driver for the USB displaylink video adapters.
           Say M/Y to add support for these devices via drm/kms interfaces.
diff --git a/drivers/gpu/drm/udl/udl_fb.c b/drivers/gpu/drm/udl/udl_fb.c
index 9fd6e83..4aa5118d 100644
--- a/drivers/gpu/drm/udl/udl_fb.c
+++ b/drivers/gpu/drm/udl/udl_fb.c
@@ -24,11 +24,15 @@
 
 #define DL_DEFIO_WRITE_DELAY    (HZ/20) /* fb_deferred_io.delay in jiffies */
 
+#ifdef CONFIG_FB_DEFERRED_IO
 static int fb_defio = 0;  /* Optionally enable experimental fb_defio mmap support */
+#endif
 static int fb_bpp = 16;
 
 module_param(fb_bpp, int, S_IWUSR | S_IRUSR | S_IWGRP | S_IRGRP);
+#ifdef CONFIG_FB_DEFERRED_IO
 module_param(fb_defio, int, S_IWUSR | S_IRUSR | S_IWGRP | S_IRGRP);
+#endif
 
 struct udl_fbdev {
 	struct drm_fb_helper helper;
@@ -78,6 +82,7 @@ static uint16_t rgb16(uint32_t col)
 }
 #endif
 
+#ifdef CONFIG_FB_DEFERRED_IO
 /*
  * NOTE: fb_defio.c is holding info->fbdefio.mutex
  *   Touching ANY framebuffer memory that triggers a page fault
@@ -139,6 +144,7 @@ error:
 		    >> 10)), /* Kcycles */
 		   &udl->cpu_kcycles_used);
 }
+#endif
 
 int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
 		      int width, int height)
@@ -331,6 +337,7 @@ static int udl_fb_open(struct fb_info *info, int user)
 
 	ufbdev->fb_count++;
 
+#ifdef CONFIG_FB_DEFERRED_IO
 	if (fb_defio && (info->fbdefio == NULL)) {
 		/* enable defio at last moment if not disabled by client */
 
@@ -346,6 +353,7 @@ static int udl_fb_open(struct fb_info *info, int user)
 		info->fbdefio = fbdefio;
 		fb_deferred_io_init(info);
 	}
+#endif
 
 	pr_notice("open /dev/fb%d user=%d fb_info=%p count=%d\n",
 		  info->node, user, info, ufbdev->fb_count);
@@ -363,12 +371,14 @@ static int udl_fb_release(struct fb_info *info, int user)
 
 	ufbdev->fb_count--;
 
+#ifdef CONFIG_FB_DEFERRED_IO
 	if ((ufbdev->fb_count == 0) && (info->fbdefio)) {
 		fb_deferred_io_cleanup(info);
 		kfree(info->fbdefio);
 		info->fbdefio = NULL;
 		info->fbops->fb_mmap = udl_fb_mmap;
 	}
+#endif
 
 	pr_warn("released /dev/fb%d user=%d count=%d\n",
 		info->node, user, ufbdev->fb_count);
-- 
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hosted by The Linux Foundation

[RFC 13/21] drm/bochs: Remove FB_KMS_HELPER and FB related config options

[Archit Taneja]

Remove FB_* config options since the driver doesn't call any fbdev
functions directly.

Remove FB_KMS_HELPER as this would now be selected by the top level
FBDEV_EMULATION config option. If the fbdev emulation isn't selected,
the drm_fb_helper functions will be stubbed out.

Cc: David Airlie <airlied@linux.ie>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>

Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/bochs/Kconfig | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/bochs/Kconfig b/drivers/gpu/drm/bochs/Kconfig
index 5f8b0c2..f739763 100644
--- a/drivers/gpu/drm/bochs/Kconfig
+++ b/drivers/gpu/drm/bochs/Kconfig
@@ -2,10 +2,6 @@ config DRM_BOCHS
 	tristate "DRM Support for bochs dispi vga interface (qemu stdvga)"
 	depends on DRM && PCI
 	select DRM_KMS_HELPER
-	select DRM_KMS_FB_HELPER
-	select FB_SYS_FILLRECT
-	select FB_SYS_COPYAREA
-	select FB_SYS_IMAGEBLIT
 	select DRM_TTM
 	help
 	  Choose this option for qemu.
-- 
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hosted by The Linux Foundation

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[RFC 14/21] drm/amdgpu: Remove FB_KMS_HELPER and FB related config options

[Archit Taneja]

Remove FB_* config options since the driver doesn't call any fbdev
functions directly.

Remove FB_KMS_HELPER as this would now be selected by the top level
FBDEV_EMULATION config option. If the fbdev emulation isn't selected,
the drm_fb_helper functions will be stubbed out.

Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Oded Gabbay <oded.gabbay@gmail.com>
Cc: "Christian König" <christian.koenig@amd.com>

Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/amd/amdgpu/Kconfig | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/Kconfig b/drivers/gpu/drm/amd/amdgpu/Kconfig
index da7dcbf..2396482 100644
--- a/drivers/gpu/drm/amd/amdgpu/Kconfig
+++ b/drivers/gpu/drm/amd/amdgpu/Kconfig
@@ -1,12 +1,8 @@
 config DRM_AMDGPU
 	tristate "AMD GPU"
 	depends on DRM && PCI
-	select FB_CFB_FILLRECT
-	select FB_CFB_COPYAREA
-	select FB_CFB_IMAGEBLIT
 	select FW_LOADER
         select DRM_KMS_HELPER
-	select DRM_KMS_FB_HELPER
         select DRM_TTM
 	select POWER_SUPPLY
 	select HWMON
-- 
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hosted by The Linux Foundation

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[RFC 15/21] drm/virtio: Remove FB_KMS_HELPER and FB related config options

[Archit Taneja]

Remove FB_* config options since the driver doesn't call any fbdev
functions directly.

Remove FB_KMS_HELPER as this would now be selected by the top level
FBDEV_EMULATION config option. If the fbdev emulation isn't selected,
the drm_fb_helper functions will be stubbed out.

Cc: David Airlie <airlied@linux.ie>
Cc: Gerd Hoffmann <kraxel@redhat.com>

Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/virtio/Kconfig | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/virtio/Kconfig b/drivers/gpu/drm/virtio/Kconfig
index 9983ead..e1afc3d 100644
--- a/drivers/gpu/drm/virtio/Kconfig
+++ b/drivers/gpu/drm/virtio/Kconfig
@@ -1,11 +1,7 @@
 config DRM_VIRTIO_GPU
 	tristate "Virtio GPU driver"
 	depends on DRM && VIRTIO
-	select FB_SYS_FILLRECT
-	select FB_SYS_COPYAREA
-	select FB_SYS_IMAGEBLIT
         select DRM_KMS_HELPER
-        select DRM_KMS_FB_HELPER
         select DRM_TTM
 	help
 	   This is the virtual GPU driver for virtio.  It can be used with
-- 
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hosted by The Linux Foundation

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[RFC 16/21] drm/fb_cma_helper: Remove FB_KMS_HELPER and FB related config options

[Archit Taneja]

Remove FB_* config options since the helper doesn't call any fbdev
functions directly.

Remove FB_KMS_HELPER as this would now be selected by the top level
FBDEV_EMULATION config option. If the fbdev emulation isn't selected,
the drm_fb_helper functions will be stubbed out.

Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>

Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/Kconfig | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 8fd670b..3e540e3 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -89,10 +89,6 @@ config DRM_KMS_CMA_HELPER
 	bool
 	depends on DRM && HAVE_DMA_ATTRS
 	select DRM_GEM_CMA_HELPER
-	select DRM_KMS_FB_HELPER
-	select FB_SYS_FILLRECT
-	select FB_SYS_COPYAREA
-	select FB_SYS_IMAGEBLIT
 	help
 	  Choose this if you need the KMS CMA helper functions
 
-- 
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hosted by The Linux Foundation

[RFC 17/21] drm/atmel-hlcdc: Remove FB_KMS_HELPER config option

[Archit Taneja]

The driver internally uses drm_fb_cma helpers to emulate fbdev and
allocate buffers. It doesn't need to select DRM_FB_KMS_HELPER. This
will be managed by the config option DRM_KMS_CMA_HELPER.

Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: Sylvain Rochet <sylvain.rochet@finsecur.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>

Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/atmel-hlcdc/Kconfig | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/atmel-hlcdc/Kconfig b/drivers/gpu/drm/atmel-hlcdc/Kconfig
index 99b4f06..32bcc4b 100644
--- a/drivers/gpu/drm/atmel-hlcdc/Kconfig
+++ b/drivers/gpu/drm/atmel-hlcdc/Kconfig
@@ -3,7 +3,6 @@ config DRM_ATMEL_HLCDC
 	depends on DRM && OF && COMMON_CLK && MFD_ATMEL_HLCDC && ARM
 	select DRM_GEM_CMA_HELPER
 	select DRM_KMS_HELPER
-	select DRM_KMS_FB_HELPER
 	select DRM_KMS_CMA_HELPER
 	select DRM_PANEL
 	help
-- 
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hosted by The Linux Foundation

[RFC 18/21] drm/imx: Remove FB_KMS_HELPER config option

[Archit Taneja]

The driver internally uses drm_fb_cma helpers to emulate fbdev and
allocate buffers. It doesn't need to select DRM_FB_KMS_HELPER. This
will be managed by the config option DRM_KMS_CMA_HELPER.

Cc: Philipp Zabel <p.zabel@pengutronix.de>

Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/imx/Kconfig | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/imx/Kconfig b/drivers/gpu/drm/imx/Kconfig
index 35ca4f0..33ae36d 100644
--- a/drivers/gpu/drm/imx/Kconfig
+++ b/drivers/gpu/drm/imx/Kconfig
@@ -1,7 +1,6 @@
 config DRM_IMX
 	tristate "DRM Support for Freescale i.MX"
 	select DRM_KMS_HELPER
-	select DRM_KMS_FB_HELPER
 	select VIDEOMODE_HELPERS
 	select DRM_GEM_CMA_HELPER
 	select DRM_KMS_CMA_HELPER
-- 
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hosted by The Linux Foundation

[RFC 19/21] drm/rcar-du: Remove FB_KMS_HELPER config option

[Archit Taneja]

The driver internally uses drm_fb_cma helpers to emulate fbdev and
allocate buffers. It doesn't need to select DRM_FB_KMS_HELPER. This
will be managed by the config option DRM_KMS_CMA_HELPER.

Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/rcar-du/Kconfig | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/rcar-du/Kconfig b/drivers/gpu/drm/rcar-du/Kconfig
index 11485a4..9de5872 100644
--- a/drivers/gpu/drm/rcar-du/Kconfig
+++ b/drivers/gpu/drm/rcar-du/Kconfig
@@ -5,7 +5,6 @@ config DRM_RCAR_DU
 	select DRM_KMS_HELPER
 	select DRM_KMS_CMA_HELPER
 	select DRM_GEM_CMA_HELPER
-	select DRM_KMS_FB_HELPER
 	select VIDEOMODE_HELPERS
 	help
 	  Choose this option if you have an R-Car chipset.
-- 
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hosted by The Linux Foundation

Re: [RFC 19/21] drm/rcar-du: Remove FB_KMS_HELPER config option

[Laurent Pinchart]

Hi Archit,

Thank you for the patch.

On Monday 13 July 2015 12:14:06 Archit Taneja wrote:
> The driver internally uses drm_fb_cma helpers to emulate fbdev and
> allocate buffers. It doesn't need to select DRM_FB_KMS_HELPER. This
> will be managed by the config option DRM_KMS_CMA_HELPER.
> 
> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> 
> Signed-off-by: Archit Taneja <architt@codeaurora.org>

Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
>  drivers/gpu/drm/rcar-du/Kconfig | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/rcar-du/Kconfig
> b/drivers/gpu/drm/rcar-du/Kconfig index 11485a4..9de5872 100644
> --- a/drivers/gpu/drm/rcar-du/Kconfig
> +++ b/drivers/gpu/drm/rcar-du/Kconfig
> @@ -5,7 +5,6 @@ config DRM_RCAR_DU
>  	select DRM_KMS_HELPER
>  	select DRM_KMS_CMA_HELPER
>  	select DRM_GEM_CMA_HELPER
> -	select DRM_KMS_FB_HELPER
>  	select VIDEOMODE_HELPERS
>  	help
>  	  Choose this option if you have an R-Car chipset.

-- 
Regards,

Laurent Pinchart

[RFC 20/21] drm/shmobile: Remove FB_KMS_HELPER config option

[Archit Taneja]

The driver internally uses drm_fb_cma helpers to emulate fbdev and
allocate buffers. It doesn't need to select DRM_FB_KMS_HELPER. This
will be managed by the config option DRM_KMS_CMA_HELPER.

Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/shmobile/Kconfig | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/shmobile/Kconfig b/drivers/gpu/drm/shmobile/Kconfig
index b9202aa..389b5f9 100644
--- a/drivers/gpu/drm/shmobile/Kconfig
+++ b/drivers/gpu/drm/shmobile/Kconfig
@@ -6,7 +6,6 @@ config DRM_SHMOBILE
 	select BACKLIGHT_CLASS_DEVICE
 	select BACKLIGHT_LCD_SUPPORT
 	select DRM_KMS_HELPER
-	select DRM_KMS_FB_HELPER
 	select DRM_KMS_CMA_HELPER
 	select DRM_GEM_CMA_HELPER
 	help
-- 
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hosted by The Linux Foundation

Re: [RFC 20/21] drm/shmobile: Remove FB_KMS_HELPER config option

[Laurent Pinchart]

Hi Archit,

Thank you for the patch.

On Monday 13 July 2015 12:14:07 Archit Taneja wrote:
> The driver internally uses drm_fb_cma helpers to emulate fbdev and
> allocate buffers. It doesn't need to select DRM_FB_KMS_HELPER. This
> will be managed by the config option DRM_KMS_CMA_HELPER.
> 
> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> 
> Signed-off-by: Archit Taneja <architt@codeaurora.org>

Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
>  drivers/gpu/drm/shmobile/Kconfig | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/shmobile/Kconfig
> b/drivers/gpu/drm/shmobile/Kconfig index b9202aa..389b5f9 100644
> --- a/drivers/gpu/drm/shmobile/Kconfig
> +++ b/drivers/gpu/drm/shmobile/Kconfig
> @@ -6,7 +6,6 @@ config DRM_SHMOBILE
>  	select BACKLIGHT_CLASS_DEVICE
>  	select BACKLIGHT_LCD_SUPPORT
>  	select DRM_KMS_HELPER
> -	select DRM_KMS_FB_HELPER
>  	select DRM_KMS_CMA_HELPER
>  	select DRM_GEM_CMA_HELPER
>  	help

-- 
Regards,

Laurent Pinchart

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[RFC 21/21] drm/tilcdc: Remove FB_KMS_HELPER config option

[Archit Taneja]

The driver internally uses drm_fb_cma helpers to emulate fbdev and
allocate buffers. It doesn't need to select DRM_FB_KMS_HELPER. This
will be managed by the config option DRM_KMS_CMA_HELPER.

Cc: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Jyri Sarha <jsarha@ti.com>

Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/tilcdc/Kconfig | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/tilcdc/Kconfig b/drivers/gpu/drm/tilcdc/Kconfig
index 78beafb..72e7944 100644
--- a/drivers/gpu/drm/tilcdc/Kconfig
+++ b/drivers/gpu/drm/tilcdc/Kconfig
@@ -2,7 +2,6 @@ config DRM_TILCDC
 	tristate "DRM Support for TI LCDC Display Controller"
 	depends on DRM && OF && ARM && HAVE_DMA_ATTRS
 	select DRM_KMS_HELPER
-	select DRM_KMS_FB_HELPER
 	select DRM_KMS_CMA_HELPER
 	select DRM_GEM_CMA_HELPER
 	select VIDEOMODE_HELPERS
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation

Re: [RFC 00/21] drm: fb emulation: Step 3: Remove FB_KMS_HELPER config from drivers

[Alex Deucher]

On Mon, Jul 13, 2015 at 2:43 AM, Archit Taneja <architt@codeaurora.org> wrote:
> With the top level DRM_FBDEV_EMULATION option, drivers don't need to
> select DRM_FB_KMS_HELPER or other FB related config options in the
> driver.
>
> Even if FBDEV_EMULATION isn't select, the stubbed out versions of
> the drm_fb_helper functions will be called.
>
> There are some drivers which still need some FB stuff even after
> these changes. They are qxl, udl and nouveau. These are handled a bit
> differently compared to the other patches.

Series is:
Acked-by: Alex Deucher <alexander.deucher@amd.com>

>
> Archit Taneja (21):
>   drm/cirrus: Remove FB_KMS_HELPER and FB related config options
>   drm/rockchip: Remove FB_KMS_HELPER and FB related config options
>   drm/armada: Remove FB_KMS_HELPER and FB related config options
>   drm/ast: Remove FB_KMS_HELPER and FB related config options
>   drm/omap: Remove FB_KMS_HELPER and FB related config options
>   drm/exynos: Remove FB_KMS_HELPER and FB related config options
>   drm/gma500: Remove FB_KMS_HELPER and FB related config options
>   drm/mgag200: Remove FB_KMS_HELPER and FB related config options
>   drm/radeon: Remove FB_KMS_HELPER and FB related config options
>   drm/qxl: Remove FB_KMS_HELPER and FB related config options
>   drm/nouveau: Remove FB_KMS_HELPER and FB related config options
>   drm/udl: Remove FB_KMS_HELPER and FB related config options
>   drm/bochs: Remove FB_KMS_HELPER and FB related config options
>   drm/amdgpu: Remove FB_KMS_HELPER and FB related config options
>   drm/virtio: Remove FB_KMS_HELPER and FB related config options
>   drm/fb_cma_helper: Remove FB_KMS_HELPER and FB related config options
>   drm/atmel-hlcdc: Remove FB_KMS_HELPER config option
>   drm/imx: Remove FB_KMS_HELPER config option
>   drm/rcar-du: Remove FB_KMS_HELPER config option
>   drm/shmobile: Remove FB_KMS_HELPER config option
>   drm/tilcdc: Remove FB_KMS_HELPER config option
>
>  drivers/gpu/drm/Kconfig             |  4 ----
>  drivers/gpu/drm/amd/amdgpu/Kconfig  |  4 ----
>  drivers/gpu/drm/armada/Kconfig      |  4 ----
>  drivers/gpu/drm/ast/Kconfig         |  4 ----
>  drivers/gpu/drm/atmel-hlcdc/Kconfig |  1 -
>  drivers/gpu/drm/bochs/Kconfig       |  4 ----
>  drivers/gpu/drm/cirrus/Kconfig      |  4 ----
>  drivers/gpu/drm/exynos/Kconfig      |  6 ------
>  drivers/gpu/drm/gma500/Kconfig      |  4 ----
>  drivers/gpu/drm/imx/Kconfig         |  1 -
>  drivers/gpu/drm/mgag200/Kconfig     |  4 ----
>  drivers/gpu/drm/nouveau/Kconfig     |  7 +------
>  drivers/gpu/drm/omapdrm/Kconfig     |  5 -----
>  drivers/gpu/drm/qxl/Kconfig         |  5 -----
>  drivers/gpu/drm/qxl/qxl_fb.c        |  4 ++++
>  drivers/gpu/drm/radeon/Kconfig      |  4 ----
>  drivers/gpu/drm/rcar-du/Kconfig     |  1 -
>  drivers/gpu/drm/rockchip/Kconfig    |  4 ----
>  drivers/gpu/drm/shmobile/Kconfig    |  1 -
>  drivers/gpu/drm/tilcdc/Kconfig      |  1 -
>  drivers/gpu/drm/udl/Kconfig         |  5 -----
>  drivers/gpu/drm/udl/udl_fb.c        | 10 ++++++++++
>  drivers/gpu/drm/virtio/Kconfig      |  4 ----
>  23 files changed, 15 insertions(+), 76 deletions(-)
>
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> hosted by The Linux Foundation
>
> _______________________________________________
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> dri-devel@lists.freedesktop.org
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Re: [RFC 00/21] drm: fb emulation: Step 3: Remove FB_KMS_HELPER config from drivers

[Daniel Vetter]

On Mon, Jul 13, 2015 at 11:30:34AM -0400, Alex Deucher wrote:
> On Mon, Jul 13, 2015 at 2:43 AM, Archit Taneja <architt@codeaurora.org> wrote:
> > With the top level DRM_FBDEV_EMULATION option, drivers don't need to
> > select DRM_FB_KMS_HELPER or other FB related config options in the
> > driver.
> >
> > Even if FBDEV_EMULATION isn't select, the stubbed out versions of
> > the drm_fb_helper functions will be called.
> >
> > There are some drivers which still need some FB stuff even after
> > these changes. They are qxl, udl and nouveau. These are handled a bit
> > differently compared to the other patches.
> 
> Series is:
> Acked-by: Alex Deucher <alexander.deucher@amd.com>

Archit for merging I think I'll just keep the current set of patches I
have for testing (well until there's a real bug discovered). Can you
please collect all the acks/r-bs/t-d when resending so I don't have to
digg them out when we merge the final versions of these?

Thanks, Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

Re: [RFC 00/21] drm: fb emulation: Step 3: Remove FB_KMS_HELPER config from drivers

[Archit Taneja]

Hi,

On 07/13/2015 09:07 PM, Daniel Vetter wrote:
> On Mon, Jul 13, 2015 at 11:30:34AM -0400, Alex Deucher wrote:
>> On Mon, Jul 13, 2015 at 2:43 AM, Archit Taneja <architt@codeaurora.org> wrote:
>>> With the top level DRM_FBDEV_EMULATION option, drivers don't need to
>>> select DRM_FB_KMS_HELPER or other FB related config options in the
>>> driver.
>>>
>>> Even if FBDEV_EMULATION isn't select, the stubbed out versions of
>>> the drm_fb_helper functions will be called.
>>>
>>> There are some drivers which still need some FB stuff even after
>>> these changes. They are qxl, udl and nouveau. These are handled a bit
>>> differently compared to the other patches.
>>
>> Series is:
>> Acked-by: Alex Deucher <alexander.deucher@amd.com>
>
> Archit for merging I think I'll just keep the current set of patches I
> have for testing (well until there's a real bug discovered). Can you
> please collect all the acks/r-bs/t-d when resending so I don't have to
> digg them out when we merge the final versions of these?
>

Sure. I'll keep a track of this.

Speaking of bugs, there was one thing I noticed in the series which I
am not sure about.

One of the new helpers wraps around framebuffer_alloc(). Most drivers
tend to pass the drm_device's dev pointer to this, and this is what I
do in the helper too.

But some drivers(nouveau, radeon, qxl and some more) pass their
pci_dev's dev pointer.

Looking at the framebuffer code, it looks like the 'dev' we pass to
framebuffer_alloc is what is used as the parent device when
creating a fb device.

After this patch set, all drivers will use drm_device's dev when
calling framebuffer_alloc. I was wondering if this could cause any
fbcon issues?

Archit

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Re: [RFC 00/21] drm: fb emulation: Step 3: Remove FB_KMS_HELPER config from drivers

[Daniel Vetter]

On Tue, Jul 14, 2015 at 12:01:51PM +0530, Archit Taneja wrote:
> Hi,
> 
> On 07/13/2015 09:07 PM, Daniel Vetter wrote:
> >On Mon, Jul 13, 2015 at 11:30:34AM -0400, Alex Deucher wrote:
> >>On Mon, Jul 13, 2015 at 2:43 AM, Archit Taneja <architt@codeaurora.org> wrote:
> >>>With the top level DRM_FBDEV_EMULATION option, drivers don't need to
> >>>select DRM_FB_KMS_HELPER or other FB related config options in the
> >>>driver.
> >>>
> >>>Even if FBDEV_EMULATION isn't select, the stubbed out versions of
> >>>the drm_fb_helper functions will be called.
> >>>
> >>>There are some drivers which still need some FB stuff even after
> >>>these changes. They are qxl, udl and nouveau. These are handled a bit
> >>>differently compared to the other patches.
> >>
> >>Series is:
> >>Acked-by: Alex Deucher <alexander.deucher@amd.com>
> >
> >Archit for merging I think I'll just keep the current set of patches I
> >have for testing (well until there's a real bug discovered). Can you
> >please collect all the acks/r-bs/t-d when resending so I don't have to
> >digg them out when we merge the final versions of these?
> >
> 
> Sure. I'll keep a track of this.
> 
> Speaking of bugs, there was one thing I noticed in the series which I
> am not sure about.
> 
> One of the new helpers wraps around framebuffer_alloc(). Most drivers
> tend to pass the drm_device's dev pointer to this, and this is what I
> do in the helper too.
> 
> But some drivers(nouveau, radeon, qxl and some more) pass their
> pci_dev's dev pointer.

Hm, didn't even notice that one.

> Looking at the framebuffer code, it looks like the 'dev' we pass to
> framebuffer_alloc is what is used as the parent device when
> creating a fb device.
> 
> After this patch set, all drivers will use drm_device's dev when
> calling framebuffer_alloc. I was wondering if this could cause any
> fbcon issues?

I think it won't matter, this is just about discovering the fbdev instance
in sysfs. And all the legacy users that do care about fbdev device nodes
don't really use that anyway.

And I think conceptually it also makes more sense to have the emulated
fbdev device as a child of the kms device.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

Re: [RFC 00/21] drm: fb emulation: Step 3: Remove FB_KMS_HELPER config from drivers

[Thierry Reding]

[-- Attachment #1.1: Type: text/plain, Size: 1745 bytes --]

On Tue, Jul 14, 2015 at 12:01:51PM +0530, Archit Taneja wrote:
> Hi,
> 
> On 07/13/2015 09:07 PM, Daniel Vetter wrote:
> >On Mon, Jul 13, 2015 at 11:30:34AM -0400, Alex Deucher wrote:
> >>On Mon, Jul 13, 2015 at 2:43 AM, Archit Taneja <architt@codeaurora.org> wrote:
> >>>With the top level DRM_FBDEV_EMULATION option, drivers don't need to
> >>>select DRM_FB_KMS_HELPER or other FB related config options in the
> >>>driver.
> >>>
> >>>Even if FBDEV_EMULATION isn't select, the stubbed out versions of
> >>>the drm_fb_helper functions will be called.
> >>>
> >>>There are some drivers which still need some FB stuff even after
> >>>these changes. They are qxl, udl and nouveau. These are handled a bit
> >>>differently compared to the other patches.
> >>
> >>Series is:
> >>Acked-by: Alex Deucher <alexander.deucher@amd.com>
> >
> >Archit for merging I think I'll just keep the current set of patches I
> >have for testing (well until there's a real bug discovered). Can you
> >please collect all the acks/r-bs/t-d when resending so I don't have to
> >digg them out when we merge the final versions of these?
> >
> 
> Sure. I'll keep a track of this.
> 
> Speaking of bugs, there was one thing I noticed in the series which I
> am not sure about.
> 
> One of the new helpers wraps around framebuffer_alloc(). Most drivers
> tend to pass the drm_device's dev pointer to this, and this is what I
> do in the helper too.
> 
> But some drivers(nouveau, radeon, qxl and some more) pass their
> pci_dev's dev pointer.

As far as I can tell, for all PCI drivers the drm_device's dev pointer
is set to the pci_dev's dev pointer (via drm_get_pci_dev()), so this
shouldn't be changing anything at all.

Thierry

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Re: [RFC 00/21] drm: fb emulation: Step 3: Remove FB_KMS_HELPER config from drivers

[Archit Taneja]

On 07/14/2015 01:32 PM, Thierry Reding wrote:
> On Tue, Jul 14, 2015 at 12:01:51PM +0530, Archit Taneja wrote:
>> Hi,
>>
>> On 07/13/2015 09:07 PM, Daniel Vetter wrote:
>>> On Mon, Jul 13, 2015 at 11:30:34AM -0400, Alex Deucher wrote:
>>>> On Mon, Jul 13, 2015 at 2:43 AM, Archit Taneja <architt@codeaurora.org> wrote:
>>>>> With the top level DRM_FBDEV_EMULATION option, drivers don't need to
>>>>> select DRM_FB_KMS_HELPER or other FB related config options in the
>>>>> driver.
>>>>>
>>>>> Even if FBDEV_EMULATION isn't select, the stubbed out versions of
>>>>> the drm_fb_helper functions will be called.
>>>>>
>>>>> There are some drivers which still need some FB stuff even after
>>>>> these changes. They are qxl, udl and nouveau. These are handled a bit
>>>>> differently compared to the other patches.
>>>>
>>>> Series is:
>>>> Acked-by: Alex Deucher <alexander.deucher@amd.com>
>>>
>>> Archit for merging I think I'll just keep the current set of patches I
>>> have for testing (well until there's a real bug discovered). Can you
>>> please collect all the acks/r-bs/t-d when resending so I don't have to
>>> digg them out when we merge the final versions of these?
>>>
>>
>> Sure. I'll keep a track of this.
>>
>> Speaking of bugs, there was one thing I noticed in the series which I
>> am not sure about.
>>
>> One of the new helpers wraps around framebuffer_alloc(). Most drivers
>> tend to pass the drm_device's dev pointer to this, and this is what I
>> do in the helper too.
>>
>> But some drivers(nouveau, radeon, qxl and some more) pass their
>> pci_dev's dev pointer.
>
> As far as I can tell, for all PCI drivers the drm_device's dev pointer
> is set to the pci_dev's dev pointer (via drm_get_pci_dev()), so this
> shouldn't be changing anything at all.

Thanks for pointing this out. This is a non-issue, then.

Archit

-- 
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a Linux Foundation Collaborative Project

Re: [RFC 14/21] drm/amdgpu: Remove FB_KMS_HELPER and FB related config options

[Koenig, Christian]

[-- Attachment #1.1: Type: text/plain, Size: 1512 bytes --]

Hi Jammy,

I suggested to make the feature optional because of the unit test's.

There we don't need this feature and actually want to test the kernel functionality.

Regards,
Christian.

Am 13.07.2015 08:45 schrieb Archit Taneja <architt@codeaurora.org>:
Remove FB_* config options since the driver doesn't call any fbdev
functions directly.

Remove FB_KMS_HELPER as this would now be selected by the top level
FBDEV_EMULATION config option. If the fbdev emulation isn't selected,
the drm_fb_helper functions will be stubbed out.

Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Oded Gabbay <oded.gabbay@gmail.com>
Cc: "Christian König" <christian.koenig@amd.com>

Signed-off-by: Archit Taneja <architt@codeaurora.org>
---
 drivers/gpu/drm/amd/amdgpu/Kconfig | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/Kconfig b/drivers/gpu/drm/amd/amdgpu/Kconfig
index da7dcbf..2396482 100644
--- a/drivers/gpu/drm/amd/amdgpu/Kconfig
+++ b/drivers/gpu/drm/amd/amdgpu/Kconfig
@@ -1,12 +1,8 @@
 config DRM_AMDGPU
         tristate "AMD GPU"
         depends on DRM && PCI
-       select FB_CFB_FILLRECT
-       select FB_CFB_COPYAREA
-       select FB_CFB_IMAGEBLIT
         select FW_LOADER
         select DRM_KMS_HELPER
-       select DRM_KMS_FB_HELPER
         select DRM_TTM
         select POWER_SUPPLY
         select HWMON
--
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Re: [RFC 14/21] drm/amdgpu: Remove FB_KMS_HELPER and FB related config options

[Christian König]

[-- Attachment #1.1: Type: text/plain, Size: 2101 bytes --]

Please completely ignore that mail, my fatty fingers have selected the 
wrong mail for replying.

Regards,
Christian.

On 13.07.2015 09:08, Koenig, Christian wrote:
>
> Hi Jammy,
>
> I suggested to make the feature optional because of the unit test's.
>
> There we don't need this feature and actually want to test the kernel 
> functionality.
>
> Regards,
> Christian.
>
> Am 13.07.2015 08:45 schrieb Archit Taneja <architt@codeaurora.org>:
>
>     Remove FB_* config options since the driver doesn't call any fbdev
>     functions directly.
>
>     Remove FB_KMS_HELPER as this would now be selected by the top level
>     FBDEV_EMULATION config option. If the fbdev emulation isn't selected,
>     the drm_fb_helper functions will be stubbed out.
>
>     Cc: Alex Deucher <alexander.deucher@amd.com>
>     Cc: Oded Gabbay <oded.gabbay@gmail.com>
>     Cc: "Christian König" <christian.koenig@amd.com>
>
>     Signed-off-by: Archit Taneja <architt@codeaurora.org>
>     ---
>      drivers/gpu/drm/amd/amdgpu/Kconfig | 4 ----
>      1 file changed, 4 deletions(-)
>
>     diff --git a/drivers/gpu/drm/amd/amdgpu/Kconfig
>     b/drivers/gpu/drm/amd/amdgpu/Kconfig
>     index da7dcbf..2396482 100644
>     --- a/drivers/gpu/drm/amd/amdgpu/Kconfig
>     +++ b/drivers/gpu/drm/amd/amdgpu/Kconfig
>     @@ -1,12 +1,8 @@
>      config DRM_AMDGPU
>              tristate "AMD GPU"
>              depends on DRM && PCI
>     -       select FB_CFB_FILLRECT
>     -       select FB_CFB_COPYAREA
>     -       select FB_CFB_IMAGEBLIT
>              select FW_LOADER
>              select DRM_KMS_HELPER
>     -       select DRM_KMS_FB_HELPER
>              select DRM_TTM
>              select POWER_SUPPLY
>              select HWMON
>     -- 
>     The Qualcomm Innovation Center, Inc. is a member of the Code
>     Aurora Forum,
>     hosted by The Linux Foundation
>
>
>
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