The mgag200 supports a single pipeline with only a primary plane. It can
be converted to simple KMS helpers. This also adds support for atomic
modesetting. Wayland compositors, which use pageflip ioctls, can now be
used with mgag200.
v2:
* prepare encoder and CRTC in a separate patch
* remove suspend/resume code in a separate patch
* don't call set_format_regs() in pipe_update()
Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
Tested-by: John Donnelly <John.p.donnelly@xxxxxxxxxx>
Acked-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
---
drivers/gpu/drm/mgag200/mgag200_drv.c | 2 +-
drivers/gpu/drm/mgag200/mgag200_mode.c | 314 +++++++++++++------------
2 files changed, 164 insertions(+), 152 deletions(-)
diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.c b/drivers/gpu/drm/mgag200/mgag200_drv.c
index c2f0e4b40b052..a06ce4198adea 100644
--- a/drivers/gpu/drm/mgag200/mgag200_drv.c
+++ b/drivers/gpu/drm/mgag200/mgag200_drv.c
@@ -140,7 +140,7 @@ int mgag200_driver_dumb_create(struct drm_file *file,
}
static struct drm_driver driver = {
- .driver_features = DRIVER_GEM | DRIVER_MODESET,
+ .driver_features = DRIVER_ATOMIC | DRIVER_GEM | DRIVER_MODESET,
.fops = &mgag200_driver_fops,
.name = DRIVER_NAME,
.desc = DRIVER_DESC,
diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c
index 00bbc1f9b7db3..b50c1beb7b7b9 100644
--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -11,10 +11,13 @@
#include <linux/delay.h>
#include <linux/pci.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_atomic_state_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_plane_helper.h>
+#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_simple_kms_helper.h>
@@ -30,13 +33,18 @@ static void mga_crtc_load_lut(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct mga_device *mdev = to_mga_device(dev);
- struct drm_framebuffer *fb = crtc->primary->fb;
+ struct drm_framebuffer *fb;
u16 *r_ptr, *g_ptr, *b_ptr;
int i;
if (!crtc->enabled)
return;
+ if (!mdev->display_pipe.plane.state)
+ return;
+
+ fb = mdev->display_pipe.plane.state->fb;
+
r_ptr = crtc->gamma_store;
g_ptr = r_ptr + crtc->gamma_size;
b_ptr = g_ptr + crtc->gamma_size;
@@ -869,56 +877,6 @@ static void mgag200_set_startadd(struct mga_device *mdev,
WREG_ECRT(0x00, crtcext0);
}
-static int mga_crtc_do_set_base(struct mga_device *mdev,
- const struct drm_framebuffer *fb,
- const struct drm_framebuffer *old_fb)
-{
- struct drm_gem_vram_object *gbo;
- int ret;
- s64 gpu_addr;
-
- if (old_fb) {
- gbo = drm_gem_vram_of_gem(old_fb->obj[0]);
- drm_gem_vram_unpin(gbo);
- }
-
- gbo = drm_gem_vram_of_gem(fb->obj[0]);
-
- ret = drm_gem_vram_pin(gbo, DRM_GEM_VRAM_PL_FLAG_VRAM);
- if (ret)
- return ret;
- gpu_addr = drm_gem_vram_offset(gbo);
- if (gpu_addr < 0) {
- ret = (int)gpu_addr;
- goto err_drm_gem_vram_unpin;
- }
-
- mgag200_set_startadd(mdev, (unsigned long)gpu_addr);
-
- return 0;
-
-err_drm_gem_vram_unpin:
- drm_gem_vram_unpin(gbo);
- return ret;
-}
-
-static int mga_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
- struct drm_framebuffer *old_fb)
-{
- struct drm_device *dev = crtc->dev;
- struct mga_device *mdev = dev->dev_private;
- struct drm_framebuffer *fb = crtc->primary->fb;
- unsigned int count;
-
- do { } while (RREG8(0x1fda) & 0x08);
- do { } while (!(RREG8(0x1fda) & 0x08));
-
- count = RREG8(MGAREG_VCOUNT) + 2;
- do { } while (RREG8(MGAREG_VCOUNT) < count);
-
- return mga_crtc_do_set_base(mdev, fb, old_fb);
-}
-
static void mgag200_set_pci_regs(struct mga_device *mdev)
{
uint32_t option = 0, option2 = 0;
@@ -1329,34 +1287,6 @@ static void mgag200_g200ev_set_hiprilvl(struct mga_device *mdev)
WREG_ECRT(0x06, 0x00);
}
-static int mga_crtc_mode_set(struct drm_crtc *crtc,
- struct drm_display_mode *mode,
- struct drm_display_mode *adjusted_mode,
- int x, int y, struct drm_framebuffer *old_fb)
-{
- struct drm_device *dev = crtc->dev;
- struct mga_device *mdev = to_mga_device(dev);
- const struct drm_framebuffer *fb = crtc->primary->fb;
-
- mgag200_init_regs(mdev);
-
- mgag200_set_format_regs(mdev, fb);
- mga_crtc_do_set_base(mdev, fb, old_fb);
- mgag200_set_offset(mdev, fb);
-
- mgag200_set_mode_regs(mdev, mode);
-
- if (mdev->type == G200_ER)
- mgag200_g200er_reset_tagfifo(mdev);
-
- if (IS_G200_SE(mdev))
- mgag200_g200se_set_hiprilvl(mdev, mode, fb);
- else if (mdev->type == G200_EV)
- mgag200_g200ev_set_hiprilvl(mdev);
-
- return 0;
-}
-
static void mga_crtc_dpms(struct drm_crtc *crtc, int mode)
{
struct drm_device *dev = crtc->dev;
@@ -1439,7 +1369,6 @@ static void mga_crtc_commit(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct mga_device *mdev = to_mga_device(dev);
- const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
u8 tmp;
if (mdev->type == G200_WB || mdev->type == G200_EW3)
@@ -1458,63 +1387,7 @@ static void mga_crtc_commit(struct drm_crtc *crtc)
WREG_SEQ(0x1, tmp);
WREG_SEQ(0, 3);
}
- crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
-}
-
-/*
- * The core can pass us a set of gamma values to program. We actually only
- * use this for 8-bit mode so can't perform smooth fades on deeper modes,
- * but it's a requirement that we provide the function
- */
-static int mga_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
- u16 *blue, uint32_t size,
- struct drm_modeset_acquire_ctx *ctx)
-{
- mga_crtc_load_lut(crtc);
-
- return 0;
-}
-
-static void mga_crtc_disable(struct drm_crtc *crtc)
-{
- DRM_DEBUG_KMS("\n");
- mga_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
- if (crtc->primary->fb) {
- struct drm_framebuffer *fb = crtc->primary->fb;
- struct drm_gem_vram_object *gbo =
- drm_gem_vram_of_gem(fb->obj[0]);
- drm_gem_vram_unpin(gbo);
- }
- crtc->primary->fb = NULL;
-}
-
-/* These provide the minimum set of functions required to handle a CRTC */
-static const struct drm_crtc_funcs mga_crtc_funcs = {
- .gamma_set = mga_crtc_gamma_set,
- .set_config = drm_crtc_helper_set_config,
- .destroy = drm_crtc_cleanup,
-};
-
-static const struct drm_crtc_helper_funcs mga_helper_funcs = {
- .disable = mga_crtc_disable,
- .dpms = mga_crtc_dpms,
- .mode_set = mga_crtc_mode_set,
- .mode_set_base = mga_crtc_mode_set_base,
- .prepare = mga_crtc_prepare,
- .commit = mga_crtc_commit,
-};
-
-/* CRTC setup */
-static void mga_crtc_init(struct mga_device *mdev)
-{
- struct drm_device *dev = mdev->dev;
- struct drm_crtc *crtc = &mdev->display_pipe.crtc;
-
- drm_crtc_init(dev, crtc, &mga_crtc_funcs);
-
- drm_mode_crtc_set_gamma_size(crtc, MGAG200_LUT_SIZE);
-
- drm_crtc_helper_add(crtc, &mga_helper_funcs);
+ mga_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
}
/*
@@ -1648,14 +1521,16 @@ static void mga_connector_destroy(struct drm_connector *connector)
}
static const struct drm_connector_helper_funcs mga_vga_connector_helper_funcs = {
- .get_modes = mga_vga_get_modes,
+ .get_modes = mga_vga_get_modes,
.mode_valid = mga_vga_mode_valid,
};
static const struct drm_connector_funcs mga_vga_connector_funcs = {
- .dpms = drm_helper_connector_dpms,
- .fill_modes = drm_helper_probe_single_connector_modes,
- .destroy = mga_connector_destroy,
+ .reset = drm_atomic_helper_connector_reset,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .destroy = mga_connector_destroy,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
static int mgag200_vga_connector_init(struct mga_device *mdev)
@@ -1687,8 +1562,137 @@ static int mgag200_vga_connector_init(struct mga_device *mdev)
return ret;
}
+/*
+ * Simple Display Pipe
+ */
+
+static enum drm_mode_status
+mgag200_simple_display_pipe_mode_valid(struct drm_simple_display_pipe *pipe,
+ const struct drm_display_mode *mode)
+{
+ return MODE_OK;
+}
+
+static void
+mgag200_simple_display_pipe_enable(struct drm_simple_display_pipe *pipe,
+ struct drm_crtc_state *crtc_state,
+ struct drm_plane_state *plane_state)
+{
+ struct drm_crtc *crtc = &pipe->crtc;
+ struct drm_device *dev = crtc->dev;
+ struct mga_device *mdev = to_mga_device(dev);
+ struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode;
+ struct drm_framebuffer *fb = plane_state->fb;
+ struct drm_gem_vram_object *gbo;
+ s64 gpu_addr;
+
+ gbo = drm_gem_vram_of_gem(fb->obj[0]);
+
+ gpu_addr = drm_gem_vram_offset(gbo);
+ if (drm_WARN_ON_ONCE(dev, gpu_addr < 0))
+ return; /* BUG: BO should have been pinned to VRAM. */
+
+ mga_crtc_prepare(crtc);
+
+ mgag200_set_format_regs(mdev, fb);
+ mgag200_set_mode_regs(mdev, adjusted_mode);
+
+ if (mdev->type == G200_ER)
+ mgag200_g200er_reset_tagfifo(mdev);
+
+ if (IS_G200_SE(mdev))
+ mgag200_g200se_set_hiprilvl(mdev, adjusted_mode, fb);
+ else if (mdev->type == G200_EV)
+ mgag200_g200ev_set_hiprilvl(mdev);
+
+ mga_crtc_commit(crtc);
+}
+
+static void
+mgag200_simple_display_pipe_disable(struct drm_simple_display_pipe *pipe)
+{
+ struct drm_crtc *crtc = &pipe->crtc;
+
+ mga_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
+}
+
+static int
+mgag200_simple_display_pipe_check(struct drm_simple_display_pipe *pipe,
+ struct drm_plane_state *plane_state,
+ struct drm_crtc_state *crtc_state)
+{
+ struct drm_plane *plane = plane_state->plane;
+ struct drm_framebuffer *new_fb = plane_state->fb;
+ struct drm_framebuffer *fb = NULL;
+
+ if (!new_fb)
+ return 0;
+
+ if (plane->state)
+ fb = plane->state->fb;
+
+ if (!fb || (fb->format != new_fb->format))
+ crtc_state->mode_changed = true; /* update PLL settings */
+
+ return 0;
+}
+
+static void
+mgag200_simple_display_pipe_update(struct drm_simple_display_pipe *pipe,
+ struct drm_plane_state *old_state)
+{
+ struct drm_plane *plane = &pipe->plane;
+ struct drm_device *dev = plane->dev;
+ struct mga_device *mdev = to_mga_device(dev);
+ struct drm_plane_state *state = plane->state;
+ struct drm_framebuffer *fb = state->fb;
+ struct drm_gem_vram_object *gbo;
+ s64 gpu_addr;
+
+ if (!fb)
+ return;
+
+ gbo = drm_gem_vram_of_gem(fb->obj[0]);
+
+ gpu_addr = drm_gem_vram_offset(gbo);
+ if (drm_WARN_ON_ONCE(dev, gpu_addr < 0))
+ return; /* BUG: BO should have been pinned to VRAM. */
+
+ mgag200_set_startadd(mdev, (unsigned long)gpu_addr);
+ mgag200_set_offset(mdev, fb);
+}
+
+static const struct drm_simple_display_pipe_funcs
+mgag200_simple_display_pipe_funcs = {
+ .mode_valid = mgag200_simple_display_pipe_mode_valid,
+ .enable = mgag200_simple_display_pipe_enable,
+ .disable = mgag200_simple_display_pipe_disable,
+ .check = mgag200_simple_display_pipe_check,
+ .update = mgag200_simple_display_pipe_update,
+ .prepare_fb = drm_gem_vram_simple_display_pipe_prepare_fb,
+ .cleanup_fb = drm_gem_vram_simple_display_pipe_cleanup_fb,
+};
+
+static const uint32_t mgag200_simple_display_pipe_formats[] = {
+ DRM_FORMAT_XRGB8888,
+ DRM_FORMAT_RGB565,
+ DRM_FORMAT_RGB888,
+};
+
+static const uint64_t mgag200_simple_display_pipe_fmtmods[] = {
+ DRM_FORMAT_MOD_LINEAR,
+ DRM_FORMAT_MOD_INVALID
+};
+
+/*
+ * Mode config
+ */
+
static const struct drm_mode_config_funcs mgag200_mode_config_funcs = {
- .fb_create = drm_gem_fb_create
+ .fb_create = drm_gem_fb_create,
+ .mode_valid = drm_vram_helper_mode_valid,
+ .atomic_check = drm_atomic_helper_check,
+ .atomic_commit = drm_atomic_helper_commit,
};
static unsigned int mgag200_preferred_depth(struct mga_device *mdev)
@@ -1702,8 +1706,9 @@ static unsigned int mgag200_preferred_depth(struct mga_device *mdev)
int mgag200_modeset_init(struct mga_device *mdev)
{
struct drm_device *dev = mdev->dev;
- struct drm_encoder *encoder = &mdev->display_pipe.encoder;
struct drm_connector *connector = &mdev->connector.base;
+ struct drm_simple_display_pipe *pipe = &mdev->display_pipe;
+ size_t format_count = ARRAY_SIZE(mgag200_simple_display_pipe_formats);
int ret;
mdev->bpp_shifts[0] = 0;
@@ -1711,6 +1716,8 @@ int mgag200_modeset_init(struct mga_device *mdev)
mdev->bpp_shifts[2] = 0;
mdev->bpp_shifts[3] = 2;
+ mgag200_init_regs(mdev);
+
ret = drmm_mode_config_init(dev);
if (ret) {
drm_err(dev, "drmm_mode_config_init() failed, error %d\n",
@@ -1728,26 +1735,31 @@ int mgag200_modeset_init(struct mga_device *mdev)
dev->mode_config.funcs = &mgag200_mode_config_funcs;
- mga_crtc_init(mdev);
-
- ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_DAC);
+ ret = mgag200_vga_connector_init(mdev);
if (ret) {
drm_err(dev,
- "drm_simple_encoder_init() failed, error %d\n",
+ "mgag200_vga_connector_init() failed, error %d\n",
ret);
return ret;
}
- encoder->possible_crtcs = 0x1;
- ret = mgag200_vga_connector_init(mdev);
+ ret = drm_simple_display_pipe_init(dev, pipe,
+ &mgag200_simple_display_pipe_funcs,
+ mgag200_simple_display_pipe_formats,
+ format_count,
+ mgag200_simple_display_pipe_fmtmods,
+ connector);
if (ret) {
drm_err(dev,
- "mgag200_vga_connector_init() failed, error %d\n",
+ "drm_simple_display_pipe_init() failed, error %d\n",
ret);
return ret;
}
- drm_connector_attach_encoder(connector, encoder);
+ /* FIXME: legacy gamma tables; convert to CRTC state */
+ drm_mode_crtc_set_gamma_size(&pipe->crtc, MGAG200_LUT_SIZE);
+
+ drm_mode_config_reset(dev);
return 0;
}
--
2.26.2
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