From: Jani Nikula Date: Tue, 28 Oct 2014 14:20:48 +0000 (+0200) Subject: drm/edid: fix Baseline_ELD_Len field in drm_edid_to_eld() X-Git-Tag: firefly_0821_release~176^2~2672^2~14^2~116 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=938fd8aaf5d5489957255530d1866332aeca7009;p=firefly-linux-kernel-4.4.55.git drm/edid: fix Baseline_ELD_Len field in drm_edid_to_eld() The Baseline_ELD_Len field does not include ELD Header Block size. From High Definition Audio Specification, Revision 1.0a: The header block is a fixed size of 4 bytes. The baseline block is variable size in multiple of 4 bytes, and its size is defined in the header block Baseline_ELD_Len field (in number of DWords). Do not include the header size in Baseline_ELD_Len field. Fix all known users of eld[2]. While at it, switch to DIV_ROUND_UP instead of open coding it. Signed-off-by: Jani Nikula Acked-by: Ben Skeggs Reviewed-by: Rodrigo Vivi Acked-by: Dave Airlie [danvet: Fix compile fail in nouveau.] Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 3bf999134bcc..45aaa6f5ef36 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -3128,9 +3128,12 @@ void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid) } } eld[5] |= sad_count << 4; - eld[2] = (20 + mnl + sad_count * 3 + 3) / 4; - DRM_DEBUG_KMS("ELD size %d, SAD count %d\n", (int)eld[2], sad_count); + eld[DRM_ELD_BASELINE_ELD_LEN] = + DIV_ROUND_UP(drm_eld_calc_baseline_block_size(eld), 4); + + DRM_DEBUG_KMS("ELD size %d, SAD count %d\n", + drm_eld_size(eld), sad_count); } EXPORT_SYMBOL(drm_edid_to_eld); diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c index 44c49dfe1096..87750ef018e6 100644 --- a/drivers/gpu/drm/i915/intel_audio.c +++ b/drivers/gpu/drm/i915/intel_audio.c @@ -107,7 +107,7 @@ static bool intel_eld_uptodate(struct drm_connector *connector, tmp &= ~bits_elda; I915_WRITE(reg_elda, tmp); - for (i = 0; i < eld[2]; i++) + for (i = 0; i < drm_eld_size(eld) / 4; i++) if (I915_READ(reg_edid) != *((uint32_t *)eld + i)) return false; @@ -162,7 +162,7 @@ static void g4x_audio_codec_enable(struct drm_connector *connector, len = (tmp >> 9) & 0x1f; /* ELD buffer size */ I915_WRITE(G4X_AUD_CNTL_ST, tmp); - len = min_t(int, eld[2], len); + len = min(drm_eld_size(eld) / 4, len); DRM_DEBUG_DRIVER("ELD size %d\n", len); for (i = 0; i < len; i++) I915_WRITE(G4X_HDMIW_HDMIEDID, *((uint32_t *)eld + i)); @@ -209,7 +209,7 @@ static void hsw_audio_codec_enable(struct drm_connector *connector, int len, i; DRM_DEBUG_KMS("Enable audio codec on pipe %c, %u bytes ELD\n", - pipe_name(pipe), eld[2]); + pipe_name(pipe), drm_eld_size(eld)); /* Enable audio presence detect, invalidate ELD */ tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD); @@ -230,8 +230,8 @@ static void hsw_audio_codec_enable(struct drm_connector *connector, I915_WRITE(HSW_AUD_DIP_ELD_CTRL(pipe), tmp); /* Up to 84 bytes of hw ELD buffer */ - len = min_t(int, eld[2], 21); - for (i = 0; i < len; i++) + len = min(drm_eld_size(eld), 84); + for (i = 0; i < len / 4; i++) I915_WRITE(HSW_AUD_EDID_DATA(pipe), *((uint32_t *)eld + i)); /* ELD valid */ @@ -320,7 +320,7 @@ static void ilk_audio_codec_enable(struct drm_connector *connector, int aud_cntrl_st2; DRM_DEBUG_KMS("Enable audio codec on port %c, pipe %c, %u bytes ELD\n", - port_name(port), pipe_name(pipe), eld[2]); + port_name(port), pipe_name(pipe), drm_eld_size(eld)); /* * FIXME: We're supposed to wait for vblank here, but we have vblanks @@ -364,8 +364,8 @@ static void ilk_audio_codec_enable(struct drm_connector *connector, I915_WRITE(aud_cntl_st, tmp); /* Up to 84 bytes of hw ELD buffer */ - len = min_t(int, eld[2], 21); - for (i = 0; i < len; i++) + len = min(drm_eld_size(eld), 84); + for (i = 0; i < len / 4; i++) I915_WRITE(hdmiw_hdmiedid, *((uint32_t *)eld + i)); /* ELD valid */ diff --git a/drivers/gpu/drm/nouveau/nv50_display.c b/drivers/gpu/drm/nouveau/nv50_display.c index 76b8c4f980ea..4d939a89a1f5 100644 --- a/drivers/gpu/drm/nouveau/nv50_display.c +++ b/drivers/gpu/drm/nouveau/nv50_display.c @@ -1681,7 +1681,8 @@ nv50_audio_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode) drm_edid_to_eld(&nv_connector->base, nv_connector->edid); memcpy(args.data, nv_connector->base.eld, sizeof(args.data)); - nvif_mthd(disp->disp, 0, &args, sizeof(args.base) + args.data[2] * 4); + nvif_mthd(disp->disp, 0, &args, + sizeof(args.base) + drm_eld_size(args.data)); } static void