Add support for the drm_panic module, which displays a pretty user
friendly message on the screen when a Linux kernel panic occurs.
It should work on all radeon using amdgpu_dm_plane.c, when the
framebuffer is linear (like when in a VT). For tiled framebuffer, it
will only work on radeon with dcn3x. It should be easy to add support
for dcn20, but I can't test it.
I've tested it on a Radeon W6400 pro, Radeon 7900XTX and
Radeon RX 5700.
Also it doesn't work yet on laptop's panel, maybe due to PSR.
Signed-off-by: Jocelyn Falempe <jfalempe@xxxxxxxxxx>
---
v2:
- Disable tiling, and force page flip in the panic_flush() callback.
- Enable tiling support for dcn31.
- Force immediate page flip.
v3:
* Add hubp_clear_tiling hook to dcn32 and dcn35
.../amd/display/amdgpu_dm/amdgpu_dm_plane.c | 136 +++++++++++++++++-
.../amd/display/dc/hubp/dcn30/dcn30_hubp.c | 17 +++
.../amd/display/dc/hubp/dcn30/dcn30_hubp.h | 2 +
.../amd/display/dc/hubp/dcn31/dcn31_hubp.c | 1 +
.../amd/display/dc/hubp/dcn32/dcn32_hubp.c | 3 +-
.../amd/display/dc/hubp/dcn35/dcn35_hubp.c | 1 +
drivers/gpu/drm/amd/display/dc/inc/hw/hubp.h | 1 +
7 files changed, 159 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
index 495e3cd70426d..60606b36f07bd 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
@@ -26,7 +26,9 @@
#include <drm/drm_atomic_helper.h>
#include <drm/drm_blend.h>
+#include "drm/drm_framebuffer.h"
#include <drm/drm_gem_atomic_helper.h>
+#include <drm/drm_panic.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_fourcc.h>
@@ -36,6 +38,7 @@
#include "amdgpu_display.h"
#include "amdgpu_dm_trace.h"
#include "amdgpu_dm_plane.h"
+#include "bif/bif_4_1_d.h"
#include "gc/gc_11_0_0_offset.h"
#include "gc/gc_11_0_0_sh_mask.h"
@@ -1421,6 +1424,124 @@ static void amdgpu_dm_plane_atomic_async_update(struct drm_plane *plane,
amdgpu_dm_plane_handle_cursor_update(plane, old_state);
}
+/* panic_bo is set in amdgpu_dm_plane_get_scanout_buffer() and only used in amdgpu_dm_set_pixel()
+ * they are called from the panic handler, and protected by the drm_panic spinlock.
+ */
+static struct amdgpu_bo *panic_abo;
+
+/* Use the indirect MMIO to write each pixel to the GPU VRAM,
+ * This is a simplified version of amdgpu_device_mm_access()
+ */
+static void amdgpu_dm_set_pixel(struct drm_scanout_buffer *sb,
+ unsigned int x,
+ unsigned int y,
+ u32 color)
+{
+ struct amdgpu_res_cursor cursor;
+ unsigned long offset;
+ struct amdgpu_bo *abo = panic_abo;
+ struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev);
+ uint32_t tmp;
+
+ offset = x * 4 + y * sb->pitch[0];
+ amdgpu_res_first(abo->tbo.resource, offset, 4, &cursor);
+
+ tmp = cursor.start >> 31;
+ WREG32_NO_KIQ(mmMM_INDEX, ((uint32_t) cursor.start) | 0x80000000);
+ if (tmp != 0xffffffff)
+ WREG32_NO_KIQ(mmMM_INDEX_HI, tmp);
+ WREG32_NO_KIQ(mmMM_DATA, color);
+}
+
+static int amdgpu_dm_plane_get_scanout_buffer(struct drm_plane *plane,
+ struct drm_scanout_buffer *sb)
+{
+ struct amdgpu_bo *abo;
+ struct drm_framebuffer *fb = plane->state->fb;
+
+ if (!fb)
+ return -EINVAL;
+
+ DRM_DEBUG_KMS("Framebuffer %dx%d %p4cc\n", fb->width, fb->height, &fb->format->format);
+
+ abo = gem_to_amdgpu_bo(fb->obj[0]);
+ if (!abo)
+ return -EINVAL;
+
+ sb->width = fb->width;
+ sb->height = fb->height;
+ /* Use the generic linear format, because tiling will be disabled in panic_flush() */
+ sb->format = drm_format_info(fb->format->format);
+ if (!sb->format)
+ return -EINVAL;
+
+ sb->pitch[0] = fb->pitches[0];
+
+ if (abo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS) {
+ if (abo->tbo.resource->mem_type != TTM_PL_VRAM) {
+ drm_warn(plane->dev, "amdgpu panic, framebuffer not in VRAM\n");
+ return -EINVAL;
+ }
+ /* Only handle 32bits format, to simplify mmio access */
+ if (fb->format->cpp[0] != 4) {
+ drm_warn(plane->dev, "amdgpu panic, pixel format is not 32bits\n");
+ return -EINVAL;
+ }
+ sb->set_pixel = amdgpu_dm_set_pixel;
+ panic_abo = abo;
+ return 0;
+ }
+ if (!abo->kmap.virtual &&
+ ttm_bo_kmap(&abo->tbo, 0, PFN_UP(abo->tbo.base.size), &abo->kmap)) {
+ drm_warn(plane->dev, "amdgpu bo map failed, panic won't be displayed\n");
+ return -ENOMEM;
+ }
+ if (abo->kmap.bo_kmap_type & TTM_BO_MAP_IOMEM_MASK)
+ iosys_map_set_vaddr_iomem(&sb->map[0], abo->kmap.virtual);
+ else
+ iosys_map_set_vaddr(&sb->map[0], abo->kmap.virtual);
+
+ return 0;
+}
+
+static void amdgpu_dm_plane_panic_flush(struct drm_plane *plane)
+{
+ struct dm_plane_state *dm_plane_state = to_dm_plane_state(plane->state);
+ struct drm_framebuffer *fb = plane->state->fb;
+ struct dc_plane_state *dc_plane_state;
+ struct dc *dc;
+ int i;
+
+ if (!dm_plane_state || !dm_plane_state->dc_state)
+ return;
+
+ dc_plane_state = dm_plane_state->dc_state;
+ dc = dc_plane_state->ctx->dc;
+ if (!dc || !dc->current_state)
+ return;
+
+ for (i = 0; i < dc->res_pool->pipe_count; i++) {
+ struct pipe_ctx *pipe_ctx = &dc->current_state->res_ctx.pipe_ctx[i];
+ struct hubp *hubp;
+
+ if (!pipe_ctx)
+ continue;
+
+ hubp = pipe_ctx->plane_res.hubp;
+ if (!hubp)
+ continue;
+
+ /* if framebuffer is tiled, disable tiling */
+ if (fb->modifier && hubp->funcs->hubp_clear_tiling)
+ hubp->funcs->hubp_clear_tiling(hubp);
+
+ /* force page flip to see the new content of the framebuffer */
+ hubp->funcs->hubp_program_surface_flip_and_addr(hubp,
+ &dc_plane_state->address,
+ true);
+ }
+}
+
static const struct drm_plane_helper_funcs dm_plane_helper_funcs = {
.prepare_fb = amdgpu_dm_plane_helper_prepare_fb,
.cleanup_fb = amdgpu_dm_plane_helper_cleanup_fb,
@@ -1429,6 +1550,16 @@ static const struct drm_plane_helper_funcs dm_plane_helper_funcs = {
.atomic_async_update = amdgpu_dm_plane_atomic_async_update
};
+static const struct drm_plane_helper_funcs dm_primary_plane_helper_funcs = {
+ .prepare_fb = amdgpu_dm_plane_helper_prepare_fb,
+ .cleanup_fb = amdgpu_dm_plane_helper_cleanup_fb,
+ .atomic_check = amdgpu_dm_plane_atomic_check,
+ .atomic_async_check = amdgpu_dm_plane_atomic_async_check,
+ .atomic_async_update = amdgpu_dm_plane_atomic_async_update,
+ .get_scanout_buffer = amdgpu_dm_plane_get_scanout_buffer,
+ .panic_flush = amdgpu_dm_plane_panic_flush,
+};
+
static void amdgpu_dm_plane_drm_plane_reset(struct drm_plane *plane)
{
struct dm_plane_state *amdgpu_state = NULL;
@@ -1855,7 +1986,10 @@ int amdgpu_dm_plane_init(struct amdgpu_display_manager *dm,
plane->type != DRM_PLANE_TYPE_CURSOR)
drm_plane_enable_fb_damage_clips(plane);
- drm_plane_helper_add(plane, &dm_plane_helper_funcs);
+ if (plane->type == DRM_PLANE_TYPE_PRIMARY)
+ drm_plane_helper_add(plane, &dm_primary_plane_helper_funcs);
+ else
+ drm_plane_helper_add(plane, &dm_plane_helper_funcs);
#ifdef AMD_PRIVATE_COLOR
dm_atomic_plane_attach_color_mgmt_properties(dm, plane);
diff --git a/drivers/gpu/drm/amd/display/dc/hubp/dcn30/dcn30_hubp.c b/drivers/gpu/drm/amd/display/dc/hubp/dcn30/dcn30_hubp.c
index 60a64d2903527..3b16c3cda2c3e 100644
--- a/drivers/gpu/drm/amd/display/dc/hubp/dcn30/dcn30_hubp.c
+++ b/drivers/gpu/drm/amd/display/dc/hubp/dcn30/dcn30_hubp.c
@@ -334,6 +334,22 @@ void hubp3_program_tiling(
}
+void hubp3_clear_tiling(struct hubp *hubp)
+{
+ struct dcn20_hubp *hubp2 = TO_DCN20_HUBP(hubp);
+
+ REG_UPDATE(DCHUBP_REQ_SIZE_CONFIG, SWATH_HEIGHT, 0);
+ REG_UPDATE(DCSURF_TILING_CONFIG, SW_MODE, DC_SW_LINEAR);
+
+ REG_UPDATE_6(DCSURF_SURFACE_CONTROL,
+ PRIMARY_SURFACE_DCC_EN, 0,
+ PRIMARY_SURFACE_DCC_IND_BLK, 0,
+ PRIMARY_SURFACE_DCC_IND_BLK_C, 0,
+ SECONDARY_SURFACE_DCC_EN, 0,
+ SECONDARY_SURFACE_DCC_IND_BLK, 0,
+ SECONDARY_SURFACE_DCC_IND_BLK_C, 0);
+}
+
void hubp3_dcc_control(struct hubp *hubp, bool enable,
enum hubp_ind_block_size blk_size)
{
@@ -512,6 +528,7 @@ static struct hubp_funcs dcn30_hubp_funcs = {
.hubp_in_blank = hubp1_in_blank,
.hubp_soft_reset = hubp1_soft_reset,
.hubp_set_flip_int = hubp1_set_flip_int,
+ .hubp_clear_tiling = hubp3_clear_tiling,
};
bool hubp3_construct(
diff --git a/drivers/gpu/drm/amd/display/dc/hubp/dcn30/dcn30_hubp.h b/drivers/gpu/drm/amd/display/dc/hubp/dcn30/dcn30_hubp.h
index b010531a7fe88..cfb01bf340a1a 100644
--- a/drivers/gpu/drm/amd/display/dc/hubp/dcn30/dcn30_hubp.h
+++ b/drivers/gpu/drm/amd/display/dc/hubp/dcn30/dcn30_hubp.h
@@ -297,6 +297,8 @@ void hubp3_read_state(struct hubp *hubp);
void hubp3_init(struct hubp *hubp);
+void hubp3_clear_tiling(struct hubp *hubp);
+
#endif /* __DC_HUBP_DCN30_H__ */
diff --git a/drivers/gpu/drm/amd/display/dc/hubp/dcn31/dcn31_hubp.c b/drivers/gpu/drm/amd/display/dc/hubp/dcn31/dcn31_hubp.c
index 8394e8c069199..46b804ed05fba 100644
--- a/drivers/gpu/drm/amd/display/dc/hubp/dcn31/dcn31_hubp.c
+++ b/drivers/gpu/drm/amd/display/dc/hubp/dcn31/dcn31_hubp.c
@@ -96,6 +96,7 @@ static struct hubp_funcs dcn31_hubp_funcs = {
.hubp_set_flip_int = hubp1_set_flip_int,
.hubp_in_blank = hubp1_in_blank,
.program_extended_blank = hubp31_program_extended_blank,
+ .hubp_clear_tiling = hubp3_clear_tiling,
};
bool hubp31_construct(
diff --git a/drivers/gpu/drm/amd/display/dc/hubp/dcn32/dcn32_hubp.c b/drivers/gpu/drm/amd/display/dc/hubp/dcn32/dcn32_hubp.c
index ca5b4b28a6644..8b5bd73b8094a 100644
--- a/drivers/gpu/drm/amd/display/dc/hubp/dcn32/dcn32_hubp.c
+++ b/drivers/gpu/drm/amd/display/dc/hubp/dcn32/dcn32_hubp.c
@@ -201,7 +201,8 @@ static struct hubp_funcs dcn32_hubp_funcs = {
.hubp_update_force_cursor_pstate_disallow = hubp32_update_force_cursor_pstate_disallow,
.phantom_hubp_post_enable = hubp32_phantom_hubp_post_enable,
.hubp_update_mall_sel = hubp32_update_mall_sel,
- .hubp_prepare_subvp_buffering = hubp32_prepare_subvp_buffering
+ .hubp_prepare_subvp_buffering = hubp32_prepare_subvp_buffering,
+ .hubp_clear_tiling = hubp3_clear_tiling,
};
bool hubp32_construct(
diff --git a/drivers/gpu/drm/amd/display/dc/hubp/dcn35/dcn35_hubp.c b/drivers/gpu/drm/amd/display/dc/hubp/dcn35/dcn35_hubp.c
index d1f05b82b3dd5..eb62042dfafc2 100644
--- a/drivers/gpu/drm/amd/display/dc/hubp/dcn35/dcn35_hubp.c
+++ b/drivers/gpu/drm/amd/display/dc/hubp/dcn35/dcn35_hubp.c
@@ -216,6 +216,7 @@ static struct hubp_funcs dcn35_hubp_funcs = {
.hubp_set_flip_int = hubp1_set_flip_int,
.hubp_in_blank = hubp1_in_blank,
.program_extended_blank = hubp31_program_extended_blank_value,
+ .hubp_clear_tiling = hubp3_clear_tiling,
};
bool hubp35_construct(
diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/hubp.h b/drivers/gpu/drm/amd/display/dc/inc/hw/hubp.h
index 16580d6242789..d0878fc0cc948 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw/hubp.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw/hubp.h
@@ -275,6 +275,7 @@ struct hubp_funcs {
enum hubp_3dlut_fl_crossbar_bit_slice bit_slice_cb_b,
enum hubp_3dlut_fl_crossbar_bit_slice bit_slice_cr_r);
int (*hubp_get_3dlut_fl_done)(struct hubp *hubp);
+ void (*hubp_clear_tiling)(struct hubp *hubp);
};
#endif
base-commit: 91e21479c81dd4e9e22a78d7446f92f6b96a7284
--
2.47.0
