video: tegra: read and use display hw data runtime

currently, TEGRA_MAX_DC and DC_N_WINDOWS macros are used
to represent number of display heads, windows based on chip
config. This change does following to support multiple SOCs
on a single binary.

- use tegra_dc_hw_data data structure and populate it based
on the chip compatible field.
- expose API's to read number of display heads, windows for
other modules.
- use the above data structure fields or API's in place of macros
in display drivers and other modules like fb,ext,screen capture.
- remove TEGRA_MAX_DC macro usage completely.
- make runtime alloc for data structures which were using static
alloc previously based on macros at compile time.
- code re-organization and cleanup with above change.

TDS-1305
TDS-1301
TDS-1408
TDS-1307

Change-Id: Ief70aa7fdac420a7a8375fe91dfae58116d3eb6e
Signed-off-by: Santosh Reddy Galma <galmar@nvidia.com>
Reviewed-on: http://git-master/r/1231688
Reviewed-by: Ujwal Patel <ujwalp@nvidia.com>
Tested-by: Ujwal Patel <ujwalp@nvidia.com>
Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>

2 files changed, 2 insertions, 8 deletions

diff --git a/include/video/tegra_dc_ext.h b/include/video/tegra_dc_ext.h
index 8e57d77fa..7099ea4b8 100644
--- a/include/video/tegra_dc_ext.h
+++ b/include/video/tegra_dc_ext.h
@@ -408,8 +408,6 @@ struct tegra_dc_ext_imp_settings {
         __u64 __user session_id_ptr; /* out - ptr to unsigned 64-bit val */
         __u64 reserved[4]; /* reserved - must be 0 */
 };
-#undef TEGRA_DC_EXT_N_WINDOWS
-#undef TEGRA_DC_EXT_N_HEADS
 
 /*
  * Variable settings is a pointer to tegra_dc_ext_imp_settings.
diff --git a/include/video/tegra_dc_ext_kernel.h b/include/video/tegra_dc_ext_kernel.h
index 44ab3a232..5d8cebe28 100644
--- a/include/video/tegra_dc_ext_kernel.h
+++ b/include/video/tegra_dc_ext_kernel.h
@@ -20,12 +20,6 @@
 #include <linux/types.h>
 #include <drm/drm_fixed.h>
 
-#if defined(CONFIG_TEGRA_NVDISPLAY)
-#define TEGRA_MAX_DC            3
-#else
-#define TEGRA_MAX_DC            2
-#endif
-
 #if defined(CONFIG_ARCH_TEGRA_14x_SOC)
 #define DC_N_WINDOWS            6
 #elif defined(CONFIG_ARCH_TEGRA_12x_SOC) || defined(CONFIG_ARCH_TEGRA_21x_SOC)
@@ -190,6 +184,8 @@ struct tegra_dc *tegra_dc_get_dc(unsigned idx);
 int tegra_dc_bandwidth_negotiate_bw(struct tegra_dc *dc,
                         struct tegra_dc_win *windows[], int n);
 #endif
+int tegra_dc_get_numof_dispheads(void);
+int tegra_dc_get_numof_dispwindows(void);
 
 /* needed by tegra-throughput */
 int tegra_dc_set_flip_callback(void (*callback)(void));