From d096d7e5a9820af1ec2e6bfce5bc4f26555729c4 Mon Sep 17 00:00:00 2001 From: Tao Bao Date: Tue, 23 Oct 2018 17:24:34 -0700 Subject: minui: Cleanup GRSurfaceDrm and MinuiBackendDrm. This CL adds a dtor to GRSurfaceDrm that handles the resource deallocation. It also manages MinuiBackendDrm::GRSurfaceDrms with smart pointers. Test: Build and boot into recovery on blueline. `Run graphics test`. Change-Id: Iff7bbdddbc0b5ab16483d00870794fca9f832bd5 --- minui/graphics_drm.cpp | 199 +++++++++++++++++++++---------------------------- minui/graphics_drm.h | 36 ++++++--- 2 files changed, 109 insertions(+), 126 deletions(-) diff --git a/minui/graphics_drm.cpp b/minui/graphics_drm.cpp index 81b49fd95..f81fd9d5c 100644 --- a/minui/graphics_drm.cpp +++ b/minui/graphics_drm.cpp @@ -24,74 +24,37 @@ #include #include +#include + +#include +#include +#include #include #include #include #include "minui/minui.h" -#define ARRAY_SIZE(A) (sizeof(A)/sizeof(*(A))) - -MinuiBackendDrm::MinuiBackendDrm() - : GRSurfaceDrms(), main_monitor_crtc(nullptr), main_monitor_connector(nullptr), drm_fd(-1) {} - -void MinuiBackendDrm::DrmDisableCrtc(int drm_fd, drmModeCrtc* crtc) { - if (crtc) { - drmModeSetCrtc(drm_fd, crtc->crtc_id, - 0, // fb_id - 0, 0, // x,y - nullptr, // connectors - 0, // connector_count - nullptr); // mode - } -} - -int MinuiBackendDrm::DrmEnableCrtc(int drm_fd, drmModeCrtc* crtc, GRSurfaceDrm* surface) { - int ret = drmModeSetCrtc(drm_fd, crtc->crtc_id, surface->fb_id, 0, 0, // x,y - &main_monitor_connector->connector_id, - 1, // connector_count - &main_monitor_crtc->mode); - - if (ret) { - printf("drmModeSetCrtc failed ret=%d\n", ret); +GRSurfaceDrm::~GRSurfaceDrm() { + if (mmapped_buffer_) { + munmap(mmapped_buffer_, row_bytes * height); } - return ret; -} - -void MinuiBackendDrm::Blank(bool blank) { - if (blank) { - DrmDisableCrtc(drm_fd, main_monitor_crtc); - } else { - DrmEnableCrtc(drm_fd, main_monitor_crtc, GRSurfaceDrms[current_buffer]); - } -} - -void MinuiBackendDrm::DrmDestroySurface(GRSurfaceDrm* surface) { - if (!surface) return; - - if (surface->mmapped_buffer_) { - munmap(surface->mmapped_buffer_, surface->row_bytes * surface->height); - } - - if (surface->fb_id) { - int ret = drmModeRmFB(drm_fd, surface->fb_id); - if (ret) { - printf("drmModeRmFB failed ret=%d\n", ret); + if (fb_id) { + if (drmModeRmFB(drm_fd_, fb_id) != 0) { + perror("Failed to drmModeRmFB"); + // Falling through to free other resources. } } - if (surface->handle) { + if (handle) { drm_gem_close gem_close = {}; - gem_close.handle = surface->handle; + gem_close.handle = handle; - int ret = drmIoctl(drm_fd, DRM_IOCTL_GEM_CLOSE, &gem_close); - if (ret) { - printf("DRM_IOCTL_GEM_CLOSE failed ret=%d\n", ret); + if (drmIoctl(drm_fd_, DRM_IOCTL_GEM_CLOSE, &gem_close) != 0) { + perror("Failed to DRM_IOCTL_GEM_CLOSE"); } } - - delete surface; } static int drm_format_to_bpp(uint32_t format) { @@ -111,10 +74,7 @@ static int drm_format_to_bpp(uint32_t format) { } } -GRSurfaceDrm* MinuiBackendDrm::DrmCreateSurface(int width, int height) { - GRSurfaceDrm* surface = new GRSurfaceDrm; - *surface = {}; - +std::unique_ptr GRSurfaceDrm::Create(int drm_fd, int width, int height) { uint32_t format; PixelFormat pixel_format = gr_pixel_format(); // PixelFormat comes in byte order, whereas DRM_FORMAT_* uses little-endian @@ -137,12 +97,12 @@ GRSurfaceDrm* MinuiBackendDrm::DrmCreateSurface(int width, int height) { create_dumb.bpp = drm_format_to_bpp(format); create_dumb.flags = 0; - int ret = drmIoctl(drm_fd, DRM_IOCTL_MODE_CREATE_DUMB, &create_dumb); - if (ret) { - printf("DRM_IOCTL_MODE_CREATE_DUMB failed ret=%d\n", ret); - DrmDestroySurface(surface); + if (drmIoctl(drm_fd, DRM_IOCTL_MODE_CREATE_DUMB, &create_dumb) != 0) { + perror("Failed to DRM_IOCTL_MODE_CREATE_DUMB"); return nullptr; } + + std::unique_ptr surface = std::make_unique(drm_fd); surface->handle = create_dumb.handle; uint32_t handles[4], pitches[4], offsets[4]; @@ -151,20 +111,16 @@ GRSurfaceDrm* MinuiBackendDrm::DrmCreateSurface(int width, int height) { pitches[0] = create_dumb.pitch; offsets[0] = 0; - ret = - drmModeAddFB2(drm_fd, width, height, format, handles, pitches, offsets, &(surface->fb_id), 0); - if (ret) { - printf("drmModeAddFB2 failed ret=%d\n", ret); - DrmDestroySurface(surface); + if (drmModeAddFB2(drm_fd, width, height, format, handles, pitches, offsets, &surface->fb_id, 0) != + 0) { + perror("Failed to drmModeAddFB2"); return nullptr; } drm_mode_map_dumb map_dumb = {}; map_dumb.handle = create_dumb.handle; - ret = drmIoctl(drm_fd, DRM_IOCTL_MODE_MAP_DUMB, &map_dumb); - if (ret) { - printf("DRM_IOCTL_MODE_MAP_DUMB failed ret=%d\n", ret); - DrmDestroySurface(surface); + if (drmIoctl(drm_fd, DRM_IOCTL_MODE_MAP_DUMB, &map_dumb) != 0) { + perror("Failed to DRM_IOCTL_MODE_MAP_DUMB"); return nullptr; } @@ -175,14 +131,44 @@ GRSurfaceDrm* MinuiBackendDrm::DrmCreateSurface(int width, int height) { auto mmapped = mmap(nullptr, surface->height * surface->row_bytes, PROT_READ | PROT_WRITE, MAP_SHARED, drm_fd, map_dumb.offset); if (mmapped == MAP_FAILED) { - perror("mmap() failed"); - DrmDestroySurface(surface); + perror("Failed to mmap()"); return nullptr; } surface->mmapped_buffer_ = static_cast(mmapped); return surface; } +void MinuiBackendDrm::DrmDisableCrtc(int drm_fd, drmModeCrtc* crtc) { + if (crtc) { + drmModeSetCrtc(drm_fd, crtc->crtc_id, + 0, // fb_id + 0, 0, // x,y + nullptr, // connectors + 0, // connector_count + nullptr); // mode + } +} + +bool MinuiBackendDrm::DrmEnableCrtc(int drm_fd, drmModeCrtc* crtc, + const std::unique_ptr& surface) { + if (drmModeSetCrtc(drm_fd, crtc->crtc_id, surface->fb_id, 0, 0, // x,y + &main_monitor_connector->connector_id, + 1, // connector_count + &main_monitor_crtc->mode) != 0) { + perror("Failed to drmModeSetCrtc"); + return false; + } + return true; +} + +void MinuiBackendDrm::Blank(bool blank) { + if (blank) { + DrmDisableCrtc(drm_fd, main_monitor_crtc); + } else { + DrmEnableCrtc(drm_fd, main_monitor_crtc, GRSurfaceDrms[current_buffer]); + } +} + static drmModeCrtc* find_crtc_for_connector(int fd, drmModeRes* resources, drmModeConnector* connector) { // Find the encoder. If we already have one, just use it. @@ -264,7 +250,7 @@ drmModeConnector* MinuiBackendDrm::FindMainMonitor(int fd, drmModeRes* resources do { main_monitor_connector = find_used_connector_by_type(fd, resources, kConnectorPriority[i]); i++; - } while (!main_monitor_connector && i < ARRAY_SIZE(kConnectorPriority)); + } while (!main_monitor_connector && i < arraysize(kConnectorPriority)); /* If we didn't find a connector, grab the first one that is connected. */ if (!main_monitor_connector) { @@ -298,60 +284,53 @@ void MinuiBackendDrm::DisableNonMainCrtcs(int fd, drmModeRes* resources, drmMode GRSurface* MinuiBackendDrm::Init() { drmModeRes* res = nullptr; + drm_fd = -1; /* Consider DRM devices in order. */ for (int i = 0; i < DRM_MAX_MINOR; i++) { - char* dev_name; - int ret = asprintf(&dev_name, DRM_DEV_NAME, DRM_DIR_NAME, i); - if (ret < 0) continue; + auto dev_name = android::base::StringPrintf(DRM_DEV_NAME, DRM_DIR_NAME, i); + android::base::unique_fd fd(open(dev_name.c_str(), O_RDWR)); + if (fd == -1) continue; - drm_fd = open(dev_name, O_RDWR, 0); - free(dev_name); - if (drm_fd < 0) continue; - - uint64_t cap = 0; /* We need dumb buffers. */ - ret = drmGetCap(drm_fd, DRM_CAP_DUMB_BUFFER, &cap); - if (ret || cap == 0) { - close(drm_fd); + if (uint64_t cap = 0; drmGetCap(fd.get(), DRM_CAP_DUMB_BUFFER, &cap) != 0 || cap == 0) { continue; } - res = drmModeGetResources(drm_fd); + res = drmModeGetResources(fd.get()); if (!res) { - close(drm_fd); continue; } /* Use this device if it has at least one connected monitor. */ if (res->count_crtcs > 0 && res->count_connectors > 0) { - if (find_first_connected_connector(drm_fd, res)) break; + if (find_first_connected_connector(fd.get(), res)) { + drm_fd = fd.release(); + break; + } } drmModeFreeResources(res); - close(drm_fd); res = nullptr; } - if (drm_fd < 0 || res == nullptr) { - perror("cannot find/open a drm device"); + if (drm_fd == -1 || res == nullptr) { + perror("Failed to find/open a drm device"); return nullptr; } uint32_t selected_mode; main_monitor_connector = FindMainMonitor(drm_fd, res, &selected_mode); - if (!main_monitor_connector) { - printf("main_monitor_connector not found\n"); + fprintf(stderr, "Failed to find main_monitor_connector\n"); drmModeFreeResources(res); close(drm_fd); return nullptr; } main_monitor_crtc = find_crtc_for_connector(drm_fd, res, main_monitor_connector); - if (!main_monitor_crtc) { - printf("main_monitor_crtc not found\n"); + fprintf(stderr, "Failed to find main_monitor_crtc\n"); drmModeFreeResources(res); close(drm_fd); return nullptr; @@ -366,21 +345,20 @@ GRSurface* MinuiBackendDrm::Init() { drmModeFreeResources(res); - GRSurfaceDrms[0] = DrmCreateSurface(width, height); - GRSurfaceDrms[1] = DrmCreateSurface(width, height); + GRSurfaceDrms[0] = GRSurfaceDrm::Create(drm_fd, width, height); + GRSurfaceDrms[1] = GRSurfaceDrm::Create(drm_fd, width, height); if (!GRSurfaceDrms[0] || !GRSurfaceDrms[1]) { - // GRSurfaceDrms and drm_fd should be freed in d'tor. return nullptr; } current_buffer = 0; // We will likely encounter errors in the backend functions (i.e. Flip) if EnableCrtc fails. - if (DrmEnableCrtc(drm_fd, main_monitor_crtc, GRSurfaceDrms[1]) != 0) { + if (!DrmEnableCrtc(drm_fd, main_monitor_crtc, GRSurfaceDrms[1])) { return nullptr; } - return GRSurfaceDrms[0]; + return GRSurfaceDrms[0].get(); } static void page_flip_complete(__unused int fd, @@ -393,12 +371,9 @@ static void page_flip_complete(__unused int fd, GRSurface* MinuiBackendDrm::Flip() { bool ongoing_flip = true; - - int ret = drmModePageFlip(drm_fd, main_monitor_crtc->crtc_id, - GRSurfaceDrms[current_buffer]->fb_id, - DRM_MODE_PAGE_FLIP_EVENT, &ongoing_flip); - if (ret < 0) { - printf("drmModePageFlip failed ret=%d\n", ret); + if (drmModePageFlip(drm_fd, main_monitor_crtc->crtc_id, GRSurfaceDrms[current_buffer]->fb_id, + DRM_MODE_PAGE_FLIP_EVENT, &ongoing_flip) != 0) { + perror("Failed to drmModePageFlip"); return nullptr; } @@ -408,9 +383,8 @@ GRSurface* MinuiBackendDrm::Flip() { .events = POLLIN }; - ret = poll(&fds, 1, -1); - if (ret == -1 || !(fds.revents & POLLIN)) { - printf("poll() failed on drm fd\n"); + if (poll(&fds, 1, -1) == -1 || !(fds.revents & POLLIN)) { + perror("Failed to poll() on drm fd"); break; } @@ -419,21 +393,18 @@ GRSurface* MinuiBackendDrm::Flip() { .page_flip_handler = page_flip_complete }; - ret = drmHandleEvent(drm_fd, &evctx); - if (ret != 0) { - printf("drmHandleEvent failed ret=%d\n", ret); + if (drmHandleEvent(drm_fd, &evctx) != 0) { + perror("Failed to drmHandleEvent"); break; } } current_buffer = 1 - current_buffer; - return GRSurfaceDrms[current_buffer]; + return GRSurfaceDrms[current_buffer].get(); } MinuiBackendDrm::~MinuiBackendDrm() { DrmDisableCrtc(drm_fd, main_monitor_crtc); - DrmDestroySurface(GRSurfaceDrms[0]); - DrmDestroySurface(GRSurfaceDrms[1]); drmModeFreeCrtc(main_monitor_crtc); drmModeFreeConnector(main_monitor_connector); close(drm_fd); diff --git a/minui/graphics_drm.h b/minui/graphics_drm.h index f3aad6bfc..02db89f05 100644 --- a/minui/graphics_drm.h +++ b/minui/graphics_drm.h @@ -18,6 +18,9 @@ #include +#include + +#include #include #include "graphics.h" @@ -25,6 +28,12 @@ class GRSurfaceDrm : public GRSurface { public: + explicit GRSurfaceDrm(int drm_fd) : drm_fd_(drm_fd) {} + ~GRSurfaceDrm() override; + + // Creates a GRSurfaceDrm instance. + static std::unique_ptr Create(int drm_fd, int width, int height); + uint8_t* data() override { return mmapped_buffer_; } @@ -32,30 +41,33 @@ class GRSurfaceDrm : public GRSurface { private: friend class MinuiBackendDrm; - uint32_t fb_id; - uint32_t handle; + const int drm_fd_; + + uint32_t fb_id{ 0 }; + uint32_t handle{ 0 }; uint8_t* mmapped_buffer_{ nullptr }; + + DISALLOW_COPY_AND_ASSIGN(GRSurfaceDrm); }; class MinuiBackendDrm : public MinuiBackend { public: + MinuiBackendDrm() = default; + ~MinuiBackendDrm() override; + GRSurface* Init() override; GRSurface* Flip() override; void Blank(bool) override; - ~MinuiBackendDrm() override; - MinuiBackendDrm(); private: void DrmDisableCrtc(int drm_fd, drmModeCrtc* crtc); - int DrmEnableCrtc(int drm_fd, drmModeCrtc* crtc, GRSurfaceDrm* surface); - GRSurfaceDrm* DrmCreateSurface(int width, int height); - void DrmDestroySurface(GRSurfaceDrm* surface); + bool DrmEnableCrtc(int drm_fd, drmModeCrtc* crtc, const std::unique_ptr& surface); void DisableNonMainCrtcs(int fd, drmModeRes* resources, drmModeCrtc* main_crtc); drmModeConnector* FindMainMonitor(int fd, drmModeRes* resources, uint32_t* mode_index); - GRSurfaceDrm* GRSurfaceDrms[2]; - int current_buffer; - drmModeCrtc* main_monitor_crtc; - drmModeConnector* main_monitor_connector; - int drm_fd; + std::unique_ptr GRSurfaceDrms[2]; + int current_buffer{ 0 }; + drmModeCrtc* main_monitor_crtc{ nullptr }; + drmModeConnector* main_monitor_connector{ nullptr }; + int drm_fd{ -1 }; }; -- cgit v1.2.3