[PATCH 11/11] drm/i915: Implement dedicated fbdev I/O helpers
Thomas Zimmermann
tzimmermann at suse.de
Fri May 12 01:41:52 PDT 2023
Implement dedicated fbdev helpers for framebuffer I/O instead
of using DRM's helpers. i915 was the only caller of the DRM
helpers, so remove them from the helper module.
Add CONFIG_DRM_I915_FBDEV_EMULATION to select the necessary
Kconfig options automatically. Make fbdev emulation depend on
the new config option.
Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
Cc: Jani Nikula <jani.nikula at linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin at linux.intel.com>
Cc: "Ville Syrjälä" <ville.syrjala at linux.intel.com>
---
drivers/gpu/drm/Kconfig | 3 -
drivers/gpu/drm/drm_fb_helper.c | 107 ------------------
drivers/gpu/drm/i915/Kconfig | 8 ++
drivers/gpu/drm/i915/Makefile | 2 +-
.../drm/i915/display/intel_display_debugfs.c | 2 +-
drivers/gpu/drm/i915/display/intel_fbdev.c | 51 ++++++++-
drivers/gpu/drm/i915/display/intel_fbdev.h | 2 +-
include/drm/drm_fb_helper.h | 39 -------
8 files changed, 56 insertions(+), 158 deletions(-)
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index c67c97471b3c..cf8d5ec5a654 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -142,9 +142,6 @@ config DRM_FBDEV_EMULATION
bool "Enable legacy fbdev support for your modesetting driver"
depends on DRM_KMS_HELPER
depends on FB=y || FB=DRM_KMS_HELPER
- select FB_CFB_FILLRECT
- select FB_CFB_COPYAREA
- select FB_CFB_IMAGEBLIT
select FRAMEBUFFER_CONSOLE if !EXPERT
select FRAMEBUFFER_CONSOLE_DETECT_PRIMARY if FRAMEBUFFER_CONSOLE
default y
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index ba0a808f14ee..5927896ad8f6 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -729,113 +729,6 @@ void drm_fb_helper_deferred_io(struct fb_info *info, struct list_head *pagerefli
}
EXPORT_SYMBOL(drm_fb_helper_deferred_io);
-/**
- * drm_fb_helper_cfb_read - Implements struct &fb_ops.fb_read for I/O memory
- * @info: fb_info struct pointer
- * @buf: userspace buffer to read from framebuffer memory
- * @count: number of bytes to read from framebuffer memory
- * @ppos: read offset within framebuffer memory
- *
- * Returns:
- * The number of bytes read on success, or an error code otherwise.
- */
-ssize_t drm_fb_helper_cfb_read(struct fb_info *info, char __user *buf,
- size_t count, loff_t *ppos)
-{
- return fb_io_read(info, buf, count, ppos);
-}
-EXPORT_SYMBOL(drm_fb_helper_cfb_read);
-
-/**
- * drm_fb_helper_cfb_write - Implements struct &fb_ops.fb_write for I/O memory
- * @info: fb_info struct pointer
- * @buf: userspace buffer to write to framebuffer memory
- * @count: number of bytes to write to framebuffer memory
- * @ppos: write offset within framebuffer memory
- *
- * Returns:
- * The number of bytes written on success, or an error code otherwise.
- */
-ssize_t drm_fb_helper_cfb_write(struct fb_info *info, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- struct drm_fb_helper *helper = info->par;
- loff_t pos = *ppos;
- ssize_t ret;
- struct drm_rect damage_area;
-
- ret = fb_io_write(info, buf, count, ppos);
- if (ret <= 0)
- return ret;
-
- if (helper->funcs->fb_dirty) {
- drm_fb_helper_memory_range_to_clip(info, pos, ret, &damage_area);
- drm_fb_helper_damage(helper, damage_area.x1, damage_area.y1,
- drm_rect_width(&damage_area),
- drm_rect_height(&damage_area));
- }
-
- return ret;
-}
-EXPORT_SYMBOL(drm_fb_helper_cfb_write);
-
-/**
- * drm_fb_helper_cfb_fillrect - wrapper around cfb_fillrect
- * @info: fbdev registered by the helper
- * @rect: info about rectangle to fill
- *
- * A wrapper around cfb_fillrect implemented by fbdev core
- */
-void drm_fb_helper_cfb_fillrect(struct fb_info *info,
- const struct fb_fillrect *rect)
-{
- struct drm_fb_helper *helper = info->par;
-
- cfb_fillrect(info, rect);
-
- if (helper->funcs->fb_dirty)
- drm_fb_helper_damage(helper, rect->dx, rect->dy, rect->width, rect->height);
-}
-EXPORT_SYMBOL(drm_fb_helper_cfb_fillrect);
-
-/**
- * drm_fb_helper_cfb_copyarea - wrapper around cfb_copyarea
- * @info: fbdev registered by the helper
- * @area: info about area to copy
- *
- * A wrapper around cfb_copyarea implemented by fbdev core
- */
-void drm_fb_helper_cfb_copyarea(struct fb_info *info,
- const struct fb_copyarea *area)
-{
- struct drm_fb_helper *helper = info->par;
-
- cfb_copyarea(info, area);
-
- if (helper->funcs->fb_dirty)
- drm_fb_helper_damage(helper, area->dx, area->dy, area->width, area->height);
-}
-EXPORT_SYMBOL(drm_fb_helper_cfb_copyarea);
-
-/**
- * drm_fb_helper_cfb_imageblit - wrapper around cfb_imageblit
- * @info: fbdev registered by the helper
- * @image: info about image to blit
- *
- * A wrapper around cfb_imageblit implemented by fbdev core
- */
-void drm_fb_helper_cfb_imageblit(struct fb_info *info,
- const struct fb_image *image)
-{
- struct drm_fb_helper *helper = info->par;
-
- cfb_imageblit(info, image);
-
- if (helper->funcs->fb_dirty)
- drm_fb_helper_damage(helper, image->dx, image->dy, image->width, image->height);
-}
-EXPORT_SYMBOL(drm_fb_helper_cfb_imageblit);
-
/**
* drm_fb_helper_set_suspend - wrapper around fb_set_suspend
* @fb_helper: driver-allocated fbdev helper, can be NULL
diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig
index e4f4d2e3fdfe..c2af3b780a7c 100644
--- a/drivers/gpu/drm/i915/Kconfig
+++ b/drivers/gpu/drm/i915/Kconfig
@@ -14,6 +14,7 @@ config DRM_I915
select DRM_DISPLAY_HDCP_HELPER
select DRM_DISPLAY_HDMI_HELPER
select DRM_DISPLAY_HELPER
+ select DRM_I915_FBDEV_EMULATION if DRM_FBDEV_EMULATION
select DRM_KMS_HELPER
select DRM_PANEL
select DRM_MIPI_DSI
@@ -154,6 +155,13 @@ config DRM_I915_PXP
protected session and manage the status of the alive software session,
as well as its life cycle.
+config DRM_I915_FBDEV_EMULATION
+ bool
+ depends on DRM_I915
+ select FB_CFB_COPYAREA
+ select FB_CFB_FILLRECT
+ select FB_CFB_IMAGEBLIT
+
menu "drm/i915 Debugging"
depends on DRM_I915
depends on EXPERT
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index d97d45ae1a0d..3593a6b8f7ab 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -286,7 +286,7 @@ i915-y += \
i915-$(CONFIG_ACPI) += \
display/intel_acpi.o \
display/intel_opregion.o
-i915-$(CONFIG_DRM_FBDEV_EMULATION) += \
+i915-$(CONFIG_DRM_I915_FBDEV_EMULATION) += \
display/intel_fbdev.o
# modesetting output/encoder code
diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
index e72288662f02..967962421c14 100644
--- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
+++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
@@ -108,7 +108,7 @@ static int i915_gem_framebuffer_info(struct seq_file *m, void *data)
struct intel_framebuffer *fbdev_fb = NULL;
struct drm_framebuffer *drm_fb;
-#ifdef CONFIG_DRM_FBDEV_EMULATION
+#ifdef CONFIG_DRM_I915_FBDEV_EMULATION
fbdev_fb = intel_fbdev_framebuffer(dev_priv->display.fbdev.fbdev);
if (fbdev_fb) {
seq_printf(m, "fbcon size: %d x %d, depth %d, %d bpp, modifier 0x%llx, refcount %d, obj ",
diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.c b/drivers/gpu/drm/i915/display/intel_fbdev.c
index aab1ae74a8f7..64aeacef703d 100644
--- a/drivers/gpu/drm/i915/display/intel_fbdev.c
+++ b/drivers/gpu/drm/i915/display/intel_fbdev.c
@@ -28,6 +28,7 @@
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/errno.h>
+#include <linux/fb.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mm.h>
@@ -84,6 +85,20 @@ static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev)
intel_frontbuffer_invalidate(to_frontbuffer(ifbdev), ORIGIN_CPU);
}
+static ssize_t intel_fbdev_fb_write(struct fb_info *info, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct drm_fb_helper *helper = info->par;
+ loff_t pos = *ppos;
+ ssize_t ret;
+
+ ret = fb_io_write(info, buf, count, ppos);
+ if (ret > 0)
+ drm_fb_helper_damage_range(helper, pos, ret);
+
+ return ret;
+}
+
static int intel_fbdev_set_par(struct fb_info *info)
{
struct intel_fbdev *ifbdev = to_intel_fbdev(info->par);
@@ -121,6 +136,30 @@ static int intel_fbdev_pan_display(struct fb_var_screeninfo *var,
return ret;
}
+static void intel_fbdev_fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
+{
+ struct drm_fb_helper *helper = info->par;
+
+ cfb_fillrect(info, rect);
+ drm_fb_helper_damage(helper, rect->dx, rect->dy, rect->width, rect->height);
+}
+
+static void intel_fbdev_fb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
+{
+ struct drm_fb_helper *helper = info->par;
+
+ cfb_copyarea(info, area);
+ drm_fb_helper_damage(helper, area->dx, area->dy, area->width, area->height);
+}
+
+static void intel_fbdev_fb_imageblit(struct fb_info *info, const struct fb_image *image)
+{
+ struct drm_fb_helper *helper = info->par;
+
+ cfb_imageblit(info, image);
+ drm_fb_helper_damage(helper, image->dx, image->dy, image->width, image->height);
+}
+
static int intel_fbdev_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
struct intel_fbdev *fbdev = to_intel_fbdev(info->par);
@@ -134,13 +173,13 @@ static const struct fb_ops intelfb_ops = {
.owner = THIS_MODULE,
DRM_FB_HELPER_DEFAULT_OPS,
.fb_set_par = intel_fbdev_set_par,
- .fb_read = drm_fb_helper_cfb_read,
- .fb_write = drm_fb_helper_cfb_write,
- .fb_fillrect = drm_fb_helper_cfb_fillrect,
- .fb_copyarea = drm_fb_helper_cfb_copyarea,
- .fb_imageblit = drm_fb_helper_cfb_imageblit,
- .fb_pan_display = intel_fbdev_pan_display,
+ .fb_read = fb_io_read,
+ .fb_write = intel_fbdev_fb_write,
.fb_blank = intel_fbdev_blank,
+ .fb_pan_display = intel_fbdev_pan_display,
+ .fb_fillrect = intel_fbdev_fb_fillrect,
+ .fb_copyarea = intel_fbdev_fb_copyarea,
+ .fb_imageblit = intel_fbdev_fb_imageblit,
.fb_mmap = intel_fbdev_mmap,
};
diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.h b/drivers/gpu/drm/i915/display/intel_fbdev.h
index 04fd523a5023..3900030808bf 100644
--- a/drivers/gpu/drm/i915/display/intel_fbdev.h
+++ b/drivers/gpu/drm/i915/display/intel_fbdev.h
@@ -13,7 +13,7 @@ struct drm_i915_private;
struct intel_fbdev;
struct intel_framebuffer;
-#ifdef CONFIG_DRM_FBDEV_EMULATION
+#if defined(CONFIG_DRM_I915_FBDEV_EMULATION)
int intel_fbdev_init(struct drm_device *dev);
void intel_fbdev_initial_config_async(struct drm_i915_private *dev_priv);
void intel_fbdev_unregister(struct drm_i915_private *dev_priv);
diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h
index e3240d749a43..15f03d8fb5cd 100644
--- a/include/drm/drm_fb_helper.h
+++ b/include/drm/drm_fb_helper.h
@@ -259,18 +259,6 @@ void drm_fb_helper_damage_range(struct drm_fb_helper *helper, off_t off, size_t
void drm_fb_helper_deferred_io(struct fb_info *info, struct list_head *pagereflist);
-ssize_t drm_fb_helper_cfb_read(struct fb_info *info, char __user *buf,
- size_t count, loff_t *ppos);
-ssize_t drm_fb_helper_cfb_write(struct fb_info *info, const char __user *buf,
- size_t count, loff_t *ppos);
-
-void drm_fb_helper_cfb_fillrect(struct fb_info *info,
- const struct fb_fillrect *rect);
-void drm_fb_helper_cfb_copyarea(struct fb_info *info,
- const struct fb_copyarea *area);
-void drm_fb_helper_cfb_imageblit(struct fb_info *info,
- const struct fb_image *image);
-
void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper, bool suspend);
void drm_fb_helper_set_suspend_unlocked(struct drm_fb_helper *fb_helper,
bool suspend);
@@ -386,33 +374,6 @@ static inline int drm_fb_helper_defio_init(struct drm_fb_helper *fb_helper)
return -ENODEV;
}
-static inline ssize_t drm_fb_helper_cfb_read(struct fb_info *info, char __user *buf,
- size_t count, loff_t *ppos)
-{
- return -ENODEV;
-}
-
-static inline ssize_t drm_fb_helper_cfb_write(struct fb_info *info, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- return -ENODEV;
-}
-
-static inline void drm_fb_helper_cfb_fillrect(struct fb_info *info,
- const struct fb_fillrect *rect)
-{
-}
-
-static inline void drm_fb_helper_cfb_copyarea(struct fb_info *info,
- const struct fb_copyarea *area)
-{
-}
-
-static inline void drm_fb_helper_cfb_imageblit(struct fb_info *info,
- const struct fb_image *image)
-{
-}
-
static inline void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper,
bool suspend)
{
--
2.40.1
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