From 3a3cd0d92a0bbec9afed252f8685ba534b2ddf6e Mon Sep 17 00:00:00 2001 From: Mahesh Kumar Date: Mon, 23 Jul 2018 16:08:24 +0530 Subject: [PATCH] drm/rcar-du/crc: Implement verify_crc_source callback This patch implements "verify_crc_source" callback function for rcar drm driver. Changes Since V1: - avoid duplication of code Changes Since V2: - further optimize the code Changes Since V3: - Adopt to driver style - Address review comments from Laurent Pinchart Signed-off-by: Mahesh Kumar Cc: dri-devel@lists.freedesktop.org Cc: Laurent Pinchart Reviewed-by: Maarten Lankhorst Reviewed-by: Laurent Pinchart Signed-off-by: Maarten Lankhorst Link: https://patchwork.freedesktop.org/patch/msgid/20180723103824.21734-1-mahesh1.kumar@intel.com --- drivers/gpu/drm/rcar-du/rcar_du_crtc.c | 69 ++++++++++++++++++++++++---------- 1 file changed, 49 insertions(+), 20 deletions(-) diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c index 15dc9caa128b..80226cac88e2 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c @@ -756,17 +756,11 @@ static void rcar_du_crtc_disable_vblank(struct drm_crtc *crtc) rcrtc->vblank_enable = false; } -static int rcar_du_crtc_set_crc_source(struct drm_crtc *crtc, - const char *source_name, - size_t *values_cnt) +static int rcar_du_crtc_parse_crc_source(struct rcar_du_crtc *rcrtc, + const char *source_name, + enum vsp1_du_crc_source *source) { - struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc); - struct drm_modeset_acquire_ctx ctx; - struct drm_crtc_state *crtc_state; - struct drm_atomic_state *state; - enum vsp1_du_crc_source source; - unsigned int index = 0; - unsigned int i; + unsigned int index; int ret; /* @@ -774,31 +768,65 @@ static int rcar_du_crtc_set_crc_source(struct drm_crtc *crtc, * CRC on an input plane (%u is the plane ID), and "auto" to compute the * CRC on the composer (VSP) output. */ + if (!source_name) { - source = VSP1_DU_CRC_NONE; + *source = VSP1_DU_CRC_NONE; + return 0; } else if (!strcmp(source_name, "auto")) { - source = VSP1_DU_CRC_OUTPUT; + *source = VSP1_DU_CRC_OUTPUT; + return 0; } else if (strstarts(source_name, "plane")) { - source = VSP1_DU_CRC_PLANE; + unsigned int i; + + *source = VSP1_DU_CRC_PLANE; ret = kstrtouint(source_name + strlen("plane"), 10, &index); if (ret < 0) return ret; for (i = 0; i < rcrtc->vsp->num_planes; ++i) { - if (index == rcrtc->vsp->planes[i].plane.base.id) { - index = i; - break; - } + if (index == rcrtc->vsp->planes[i].plane.base.id) + return i; } + } - if (i >= rcrtc->vsp->num_planes) - return -EINVAL; - } else { + return -EINVAL; +} + +static int rcar_du_crtc_verify_crc_source(struct drm_crtc *crtc, + const char *source_name, + size_t *values_cnt) +{ + struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc); + enum vsp1_du_crc_source source; + + if (rcar_du_crtc_parse_crc_source(rcrtc, source_name, &source) < 0) { + DRM_DEBUG_DRIVER("unknown source %s\n", source_name); return -EINVAL; } *values_cnt = 1; + return 0; +} + +static int rcar_du_crtc_set_crc_source(struct drm_crtc *crtc, + const char *source_name, + size_t *values_cnt) +{ + struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc); + struct drm_modeset_acquire_ctx ctx; + struct drm_crtc_state *crtc_state; + struct drm_atomic_state *state; + enum vsp1_du_crc_source source; + unsigned int index; + int ret; + + ret = rcar_du_crtc_parse_crc_source(rcrtc, source_name, &source); + if (ret < 0) + return ret; + + index = ret; + *values_cnt = 1; /* Perform an atomic commit to set the CRC source. */ drm_modeset_acquire_init(&ctx, 0); @@ -861,6 +889,7 @@ static const struct drm_crtc_funcs crtc_funcs_gen3 = { .enable_vblank = rcar_du_crtc_enable_vblank, .disable_vblank = rcar_du_crtc_disable_vblank, .set_crc_source = rcar_du_crtc_set_crc_source, + .verify_crc_source = rcar_du_crtc_verify_crc_source, }; /* ----------------------------------------------------------------------------- -- 2.11.0