diff options
Diffstat (limited to 'drivers/gpu/drm/stm')
| -rw-r--r-- | drivers/gpu/drm/stm/dw_mipi_dsi-stm.c | 6 | ||||
| -rw-r--r-- | drivers/gpu/drm/stm/ltdc.c | 66 |
2 files changed, 49 insertions, 23 deletions
diff --git a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c b/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c index e5b6310240fe..3e8b9ed7e8b3 100644 --- a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c +++ b/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c @@ -129,7 +129,7 @@ static int dsi_pll_get_params(int clkin_khz, int clkout_khz, int fvco_min, fvco_max, delta, best_delta; /* all in khz */ /* Early checks preventing division by 0 & odd results */ - if ((clkin_khz <= 0) || (clkout_khz <= 0)) + if (clkin_khz <= 0 || clkout_khz <= 0) return -EINVAL; fvco_min = LANE_MIN_KBPS * 2 * ODF_MAX; @@ -155,7 +155,7 @@ static int dsi_pll_get_params(int clkin_khz, int clkout_khz, for (o = ODF_MIN; o <= ODF_MAX; o *= 2) { n = DIV_ROUND_CLOSEST(i * o * clkout_khz, clkin_khz); /* Check ndiv according to vco range */ - if ((n < n_min) || (n > n_max)) + if (n < n_min || n > n_max) continue; /* Check if new delta is better & saves parameters */ delta = dsi_pll_get_clkout_khz(clkin_khz, i, n, o) - @@ -342,7 +342,7 @@ static struct platform_driver dw_mipi_dsi_stm_driver = { .remove = dw_mipi_dsi_stm_remove, .driver = { .of_match_table = dw_mipi_dsi_stm_dt_ids, - .name = "dw_mipi_dsi-stm", + .name = "stm32-display-dsi", }, }; diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c index 735c9081202a..35e884239f60 100644 --- a/drivers/gpu/drm/stm/ltdc.c +++ b/drivers/gpu/drm/stm/ltdc.c @@ -33,6 +33,8 @@ #define MAX_IRQ 4 +#define MAX_ENDPOINTS 2 + #define HWVER_10200 0x010200 #define HWVER_10300 0x010300 #define HWVER_20101 0x020101 @@ -556,7 +558,7 @@ static int ltdc_plane_atomic_check(struct drm_plane *plane, src_h = state->src_h >> 16; /* Reject scaling */ - if ((src_w != state->crtc_w) || (src_h != state->crtc_h)) { + if (src_w != state->crtc_w || src_h != state->crtc_h) { DRM_ERROR("Scaling is not supported"); return -EINVAL; } @@ -856,18 +858,33 @@ int ltdc_load(struct drm_device *ddev) struct ltdc_device *ldev = ddev->dev_private; struct device *dev = ddev->dev; struct device_node *np = dev->of_node; - struct drm_bridge *bridge; - struct drm_panel *panel; + struct drm_bridge *bridge[MAX_ENDPOINTS] = {NULL}; + struct drm_panel *panel[MAX_ENDPOINTS] = {NULL}; struct drm_crtc *crtc; struct reset_control *rstc; struct resource *res; - int irq, ret, i; + int irq, ret, i, endpoint_not_ready = -ENODEV; DRM_DEBUG_DRIVER("\n"); - ret = drm_of_find_panel_or_bridge(np, 0, 0, &panel, &bridge); - if (ret) - return ret; + /* Get endpoints if any */ + for (i = 0; i < MAX_ENDPOINTS; i++) { + ret = drm_of_find_panel_or_bridge(np, 0, i, &panel[i], + &bridge[i]); + + /* + * If at least one endpoint is ready, continue probing, + * else if at least one endpoint is -EPROBE_DEFER and + * there is no previous ready endpoints, defer probing. + */ + if (!ret) + endpoint_not_ready = 0; + else if (ret == -EPROBE_DEFER && endpoint_not_ready) + endpoint_not_ready = -EPROBE_DEFER; + } + + if (endpoint_not_ready) + return endpoint_not_ready; rstc = devm_reset_control_get_exclusive(dev, NULL); @@ -928,19 +945,25 @@ int ltdc_load(struct drm_device *ddev) DRM_INFO("ltdc hw version 0x%08x - ready\n", ldev->caps.hw_version); - if (panel) { - bridge = drm_panel_bridge_add(panel, DRM_MODE_CONNECTOR_DPI); - if (IS_ERR(bridge)) { - DRM_ERROR("Failed to create panel-bridge\n"); - ret = PTR_ERR(bridge); - goto err; + /* Add endpoints panels or bridges if any */ + for (i = 0; i < MAX_ENDPOINTS; i++) { + if (panel[i]) { + bridge[i] = drm_panel_bridge_add(panel[i], + DRM_MODE_CONNECTOR_DPI); + if (IS_ERR(bridge[i])) { + DRM_ERROR("panel-bridge endpoint %d\n", i); + ret = PTR_ERR(bridge[i]); + goto err; + } } - } - ret = ltdc_encoder_init(ddev, bridge); - if (ret) { - DRM_ERROR("Failed to init encoder\n"); - goto err; + if (bridge[i]) { + ret = ltdc_encoder_init(ddev, bridge[i]); + if (ret) { + DRM_ERROR("init encoder endpoint %d\n", i); + goto err; + } + } } crtc = devm_kzalloc(dev, sizeof(*crtc), GFP_KERNEL); @@ -968,7 +991,8 @@ int ltdc_load(struct drm_device *ddev) return 0; err: - drm_panel_bridge_remove(bridge); + for (i = 0; i < MAX_ENDPOINTS; i++) + drm_panel_bridge_remove(bridge[i]); clk_disable_unprepare(ldev->pixel_clk); @@ -978,10 +1002,12 @@ err: void ltdc_unload(struct drm_device *ddev) { struct ltdc_device *ldev = ddev->dev_private; + int i; DRM_DEBUG_DRIVER("\n"); - drm_of_panel_bridge_remove(ddev->dev->of_node, 0, 0); + for (i = 0; i < MAX_ENDPOINTS; i++) + drm_of_panel_bridge_remove(ddev->dev->of_node, 0, i); clk_disable_unprepare(ldev->pixel_clk); } |