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drm/edid: fix Baseline_ELD_Len field in drm_edid_to_eld()

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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 <jani.nikula@intel.com>
Acked-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Acked-by: Dave Airlie <airlied@linux.ie>
[danvet: Fix compile fail in nouveau.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jani Nikula 2014-10-28 16:20:48 +02:00 committed by Daniel Vetter
parent 6ccb81f217
commit 938fd8aaf5
3 changed files with 15 additions and 11 deletions
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7
drivers/gpu/drm/drm_edid.c
View File

@ -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);

16
drivers/gpu/drm/i915/intel_audio.c
View File

@ -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 */

3
drivers/gpu/drm/nouveau/nv50_display.c
View File

@ -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