diff options
| -rw-r--r-- | drivers/gpu/drm/solomon/ssd130x.c | 158 | ||||
| -rw-r--r-- | drivers/gpu/drm/solomon/ssd130x.h | 3 |
2 files changed, 121 insertions, 40 deletions
diff --git a/drivers/gpu/drm/solomon/ssd130x.c b/drivers/gpu/drm/solomon/ssd130x.c index 51472a184ef9..d2f8dd6a6347 100644 --- a/drivers/gpu/drm/solomon/ssd130x.c +++ b/drivers/gpu/drm/solomon/ssd130x.c @@ -141,6 +141,19 @@ const struct ssd130x_deviceinfo ssd130x_variants[] = { }; EXPORT_SYMBOL_NS_GPL(ssd130x_variants, DRM_SSD130X); +struct ssd130x_plane_state { + struct drm_plane_state base; + /* Intermediate buffer to convert pixels from XRGB8888 to HW format */ + u8 *buffer; + /* Buffer to store pixels in HW format and written to the panel */ + u8 *data_array; +}; + +static inline struct ssd130x_plane_state *to_ssd130x_plane_state(struct drm_plane_state *state) +{ + return container_of(state, struct ssd130x_plane_state, base); +} + static inline struct ssd130x_device *drm_to_ssd130x(struct drm_device *drm) { return container_of(drm, struct ssd130x_device, drm); @@ -434,12 +447,14 @@ static int ssd130x_init(struct ssd130x_device *ssd130x) SSD130X_SET_ADDRESS_MODE_HORIZONTAL); } -static int ssd130x_update_rect(struct ssd130x_device *ssd130x, struct drm_rect *rect) +static int ssd130x_update_rect(struct ssd130x_device *ssd130x, + struct ssd130x_plane_state *ssd130x_state, + struct drm_rect *rect) { unsigned int x = rect->x1; unsigned int y = rect->y1; - u8 *buf = ssd130x->buffer; - u8 *data_array = ssd130x->data_array; + u8 *buf = ssd130x_state->buffer; + u8 *data_array = ssd130x_state->data_array; unsigned int width = drm_rect_width(rect); unsigned int height = drm_rect_height(rect); unsigned int line_length = DIV_ROUND_UP(width, 8); @@ -535,7 +550,8 @@ static int ssd130x_update_rect(struct ssd130x_device *ssd130x, struct drm_rect * return ret; } -static void ssd130x_clear_screen(struct ssd130x_device *ssd130x) +static void ssd130x_clear_screen(struct ssd130x_device *ssd130x, + struct ssd130x_plane_state *ssd130x_state) { struct drm_rect fullscreen = { .x1 = 0, @@ -544,21 +560,21 @@ static void ssd130x_clear_screen(struct ssd130x_device *ssd130x) .y2 = ssd130x->height, }; - ssd130x_update_rect(ssd130x, &fullscreen); + ssd130x_update_rect(ssd130x, ssd130x_state, &fullscreen); } -static int ssd130x_fb_blit_rect(struct drm_framebuffer *fb, const struct iosys_map *vmap, +static int ssd130x_fb_blit_rect(struct drm_plane_state *state, + const struct iosys_map *vmap, struct drm_rect *rect) { + struct drm_framebuffer *fb = state->fb; struct ssd130x_device *ssd130x = drm_to_ssd130x(fb->dev); unsigned int page_height = ssd130x->device_info->page_height; + struct ssd130x_plane_state *ssd130x_state = to_ssd130x_plane_state(state); + u8 *buf = ssd130x_state->buffer; struct iosys_map dst; unsigned int dst_pitch; int ret = 0; - u8 *buf = ssd130x->buffer; - - if (!buf) - return 0; /* Align y to display page boundaries */ rect->y1 = round_down(rect->y1, page_height); @@ -575,11 +591,49 @@ static int ssd130x_fb_blit_rect(struct drm_framebuffer *fb, const struct iosys_m drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE); - ssd130x_update_rect(ssd130x, rect); + ssd130x_update_rect(ssd130x, ssd130x_state, rect); return ret; } +static int ssd130x_primary_plane_helper_atomic_check(struct drm_plane *plane, + struct drm_atomic_state *state) +{ + struct drm_device *drm = plane->dev; + struct ssd130x_device *ssd130x = drm_to_ssd130x(drm); + struct drm_plane_state *plane_state = drm_atomic_get_new_plane_state(state, plane); + struct ssd130x_plane_state *ssd130x_state = to_ssd130x_plane_state(plane_state); + unsigned int page_height = ssd130x->device_info->page_height; + unsigned int pages = DIV_ROUND_UP(ssd130x->height, page_height); + const struct drm_format_info *fi; + unsigned int pitch; + int ret; + + ret = drm_plane_helper_atomic_check(plane, state); + if (ret) + return ret; + + fi = drm_format_info(DRM_FORMAT_R1); + if (!fi) + return -EINVAL; + + pitch = drm_format_info_min_pitch(fi, 0, ssd130x->width); + + ssd130x_state->buffer = kcalloc(pitch, ssd130x->height, GFP_KERNEL); + if (!ssd130x_state->buffer) + return -ENOMEM; + + ssd130x_state->data_array = kcalloc(ssd130x->width, pages, GFP_KERNEL); + if (!ssd130x_state->data_array) { + kfree(ssd130x_state->buffer); + /* Set to prevent a double free in .atomic_destroy_state() */ + ssd130x_state->buffer = NULL; + return -ENOMEM; + } + + return 0; +} + static void ssd130x_primary_plane_helper_atomic_update(struct drm_plane *plane, struct drm_atomic_state *state) { @@ -602,7 +656,7 @@ static void ssd130x_primary_plane_helper_atomic_update(struct drm_plane *plane, if (!drm_rect_intersect(&dst_clip, &damage)) continue; - ssd130x_fb_blit_rect(plane_state->fb, &shadow_plane_state->data[0], &dst_clip); + ssd130x_fb_blit_rect(plane_state, &shadow_plane_state->data[0], &dst_clip); } drm_dev_exit(idx); @@ -613,19 +667,69 @@ static void ssd130x_primary_plane_helper_atomic_disable(struct drm_plane *plane, { struct drm_device *drm = plane->dev; struct ssd130x_device *ssd130x = drm_to_ssd130x(drm); + struct ssd130x_plane_state *ssd130x_state = to_ssd130x_plane_state(plane->state); int idx; if (!drm_dev_enter(drm, &idx)) return; - ssd130x_clear_screen(ssd130x); + ssd130x_clear_screen(ssd130x, ssd130x_state); drm_dev_exit(idx); } +/* Called during init to allocate the plane's atomic state. */ +static void ssd130x_primary_plane_reset(struct drm_plane *plane) +{ + struct ssd130x_plane_state *ssd130x_state; + + WARN_ON(plane->state); + + ssd130x_state = kzalloc(sizeof(*ssd130x_state), GFP_KERNEL); + if (!ssd130x_state) + return; + + __drm_atomic_helper_plane_reset(plane, &ssd130x_state->base); +} + +static struct drm_plane_state *ssd130x_primary_plane_duplicate_state(struct drm_plane *plane) +{ + struct ssd130x_plane_state *old_ssd130x_state; + struct ssd130x_plane_state *ssd130x_state; + + if (WARN_ON(!plane->state)) + return NULL; + + old_ssd130x_state = to_ssd130x_plane_state(plane->state); + ssd130x_state = kmemdup(old_ssd130x_state, sizeof(*ssd130x_state), GFP_KERNEL); + if (!ssd130x_state) + return NULL; + + /* The buffers are not duplicated and are allocated in .atomic_check */ + ssd130x_state->buffer = NULL; + ssd130x_state->data_array = NULL; + + __drm_atomic_helper_plane_duplicate_state(plane, &ssd130x_state->base); + + return &ssd130x_state->base; +} + +static void ssd130x_primary_plane_destroy_state(struct drm_plane *plane, + struct drm_plane_state *state) +{ + struct ssd130x_plane_state *ssd130x_state = to_ssd130x_plane_state(state); + + kfree(ssd130x_state->data_array); + kfree(ssd130x_state->buffer); + + __drm_atomic_helper_plane_destroy_state(&ssd130x_state->base); + + kfree(ssd130x_state); +} + static const struct drm_plane_helper_funcs ssd130x_primary_plane_helper_funcs = { DRM_GEM_SHADOW_PLANE_HELPER_FUNCS, - .atomic_check = drm_plane_helper_atomic_check, + .atomic_check = ssd130x_primary_plane_helper_atomic_check, .atomic_update = ssd130x_primary_plane_helper_atomic_update, .atomic_disable = ssd130x_primary_plane_helper_atomic_disable, }; @@ -633,6 +737,9 @@ static const struct drm_plane_helper_funcs ssd130x_primary_plane_helper_funcs = static const struct drm_plane_funcs ssd130x_primary_plane_funcs = { .update_plane = drm_atomic_helper_update_plane, .disable_plane = drm_atomic_helper_disable_plane, + .reset = ssd130x_primary_plane_reset, + .atomic_duplicate_state = ssd130x_primary_plane_duplicate_state, + .atomic_destroy_state = ssd130x_primary_plane_destroy_state, .destroy = drm_plane_cleanup, DRM_GEM_SHADOW_PLANE_FUNCS, }; @@ -677,10 +784,6 @@ static void ssd130x_encoder_helper_atomic_enable(struct drm_encoder *encoder, { struct drm_device *drm = encoder->dev; struct ssd130x_device *ssd130x = drm_to_ssd130x(drm); - unsigned int page_height = ssd130x->device_info->page_height; - unsigned int pages = DIV_ROUND_UP(ssd130x->height, page_height); - const struct drm_format_info *fi; - unsigned int pitch; int ret; ret = ssd130x_power_on(ssd130x); @@ -691,22 +794,6 @@ static void ssd130x_encoder_helper_atomic_enable(struct drm_encoder *encoder, if (ret) goto power_off; - fi = drm_format_info(DRM_FORMAT_R1); - if (!fi) - goto power_off; - - pitch = drm_format_info_min_pitch(fi, 0, ssd130x->width); - - ssd130x->buffer = kcalloc(pitch, ssd130x->height, GFP_KERNEL); - if (!ssd130x->buffer) - goto power_off; - - ssd130x->data_array = kcalloc(ssd130x->width, pages, GFP_KERNEL); - if (!ssd130x->data_array) { - kfree(ssd130x->buffer); - goto power_off; - } - ssd130x_write_cmd(ssd130x, 1, SSD130X_DISPLAY_ON); backlight_enable(ssd130x->bl_dev); @@ -728,9 +815,6 @@ static void ssd130x_encoder_helper_atomic_disable(struct drm_encoder *encoder, ssd130x_write_cmd(ssd130x, 1, SSD130X_DISPLAY_OFF); - kfree(ssd130x->data_array); - kfree(ssd130x->buffer); - ssd130x_power_off(ssd130x); } diff --git a/drivers/gpu/drm/solomon/ssd130x.h b/drivers/gpu/drm/solomon/ssd130x.h index 161588b1cc4d..87968b3e7fb8 100644 --- a/drivers/gpu/drm/solomon/ssd130x.h +++ b/drivers/gpu/drm/solomon/ssd130x.h @@ -89,9 +89,6 @@ struct ssd130x_device { u8 col_end; u8 page_start; u8 page_end; - - u8 *buffer; - u8 *data_array; }; extern const struct ssd130x_deviceinfo ssd130x_variants[]; |