msm: vidc: Add support for setting initial qp

Adds support to set initial qp, thereby allowing the client to set
initial qp for I,P, and B frames.

Change-Id: Ie956651bde85e800d97a0007769af9aec8ca16a4
Signed-off-by: Ashray Kulkarni <ashrayk@codeaurora.org>

Conflicts:
	drivers/media/platform/msm/vidc/vidc_hfi_api.h
	drivers/media/platform/msm/vidc/vidc_hfi_helper.h
msm: vidc: Amend calculation of buffer sizes in VENUS_BUFFER_SIZE

Add 8KB worth of padding for extradata. This is required to accommodate
some of the larger extradata types that didn't fit into the residual
space between the actual buffer size and its aligned size.

CRs-Fixed: 647378
Change-Id: I550f806079dfbdece229f68ffdfc5c0e20b3c9e1
Signed-off-by: Deva Ramasubramanian <dramasub@codeaurora.org>
msm: vidc: Add AFD and CC metadata support to extradata

Add support and control for setting Active format
description and closed caption meta data in the
extradata. FW parses metadata and adds it to the
extradata. Client can use control to parse extradata
for the metadata information.

Change-Id: I79fb71e635927c95e0792862c9dea7d96f58e895
Signed-off-by: Jayasena Sangaraboina <jsanga@codeaurora.org>
msm: vidc: Add support for different errors

When hardware is overloaded or when max number of clients are
reached in driver or firmware, hardware error is sent to video
client. This change is to replace hardware error with actual
errors.

CRs-fixed: 575852
Change-Id: I07e599f894a3716a3dc4fed5eb7c987311f5bdde
Signed-off-by: Deepak Verma <dverma@codeaurora.org>
msm: vidc: Change in input buffer size calculation

Right now, input buffer size is calculated based on
maximum supported height and width returned from FW.
These values are not true representation as they are
calculated for rotation usecase. Driver needs to use
max MB supported from FW. This change fixes the same.

CRs-Fixed: 599818
Change-Id: I5b5f7d0db1088a4bc16ec7a32b31e1f763d5da7c
Signed-off-by: Manikanta Sivapala <msivap@codeaurora.org>

Conflicts:
	drivers/media/platform/msm/vidc/msm_vdec.c
msm: vidc: add new control for limiting i/p buffer size

Take the minimum of the size calculated by driver using
max width and height supported and the size set by client
for input buffers. Change interface to get input and
output buffer sizes.

Change-Id: Ia3eb4cc7ae7bb38e2650fff1b694623e2aab62ef
Signed-off-by: Manikanta Sivapala <msivap@codeaurora.org>