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Daniel Mentz bbff585cb5 drm/mipi-dsi: Fix byte order of 16-bit DCS set/get brightness 
[ Upstream commit c9d27c6be5 ]

The MIPI DCS specification demands that brightness values are sent in
big endian byte order. It also states that one parameter (i.e. one byte)
shall be sent/received for 8 bit wide values, and two parameters shall
be used for values that are between 9 and 16 bits wide.

Add new functions to properly handle 16-bit brightness in big endian,
since the two 8- and 16-bit cases are distinct from each other.

[richard: use separate functions instead of switch/case]
[richard: split into 16-bit component]

Fixes: 1a9d759331 ("drm/dsi: Implement DCS set/get display brightness")
Signed-off-by: Daniel Mentz <danielmentz@google.com>
Link: 754affd62d
[richard: fix 16-bit brightness_get]
Signed-off-by: Richard Acayan <mailingradian@gmail.com>
Tested-by: Caleb Connolly <caleb@connolly.tech>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230116224909.23884-2-mailingradian@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2023-03-11 16:26:39 +01:00
..
bridge Merge airlied/drm-next into drm-misc-next 2017-07-26 13:43:33 +02:00
i2c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tinydrm drm/tinydrm: Generalize tinydrm_xrgb8888_to_gray8() 2017-08-09 17:55:50 +02:00
ttm drm/ttm: make ttm_mem_type_manager_func debug more useful 2017-08-17 15:45:59 -04:00
ati_pcigart.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
drmP.h drm: Document device unplug infrastructure 2017-08-11 10:48:03 +02:00
drm_agpsupport.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
drm_atomic.h drm: Nuke drm_atomic_legacy_backoff 2017-08-08 14:49:29 +02:00
drm_atomic_helper.h drm: Nuke drm_atomic_helper_connector_dpms 2017-08-08 14:48:48 +02:00
drm_auth.h drm: Move drm_lock_data out of drmP.h 2017-03-09 16:18:02 +01:00
drm_blend.h drm: Add DRM_MODE_ROTATE_ and DRM_MODE_REFLECT_ to UAPI 2017-05-22 09:49:48 +02:00
drm_bridge.h drm/bridge: Add a devm_ allocator for panel bridge. 2017-07-26 12:19:47 -07:00
drm_cache.h drm: disable uncached DMA optimization for ARM and arm64 2019-03-13 14:03:23 -07:00
drm_color_mgmt.h drm: drm_color_mgmt.h needs struct drm_crtc declaration 2017-05-02 10:30:23 +02:00
drm_connector.h drm: Handle properties in the core for atomic drivers 2017-08-08 14:45:09 +02:00
drm_crtc.h drm: Handle properties in the core for atomic drivers 2017-08-08 14:45:09 +02:00
drm_crtc_helper.h drm: Allow determining if current task is output poll worker 2018-03-15 10:54:29 +01:00
drm_debugfs.h drm/debugfs: Add kerneldoc 2017-03-24 09:36:06 +01:00
drm_debugfs_crc.h drm/crc: Only report a single overflow when a CRC fd is opened 2019-07-31 07:28:56 +02:00
drm_device.h drm: Extract drm_device.h 2017-08-11 10:47:17 +02:00
drm_displayid.h
…
drm_dp_dual_mode_helper.h
…
drm_dp_helper.h drm: Add DP PSR2 sink enable bit 2018-08-03 07:50:42 +02:00
drm_dp_mst_helper.h drm: mst: Fix query_payload ack reply struct 2019-12-31 12:36:46 +01:00
drm_drv.h drm/nouveau: prefer XBGR2101010 for addfb ioctl 2018-03-15 10:54:30 +01:00
drm_edid.h drm: fix EDID struct for old ARM OABI format 2022-06-14 16:53:47 +02:00
drm_encoder.h drm/doc: Fix typos for early_unregister doc 2017-01-26 10:49:09 +01:00
drm_encoder_slave.h
…
drm_fb_cma_helper.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
drm_fb_helper.h drm: remove unused and redundant callbacks 2017-08-07 11:20:36 +02:00
drm_file.h drm: introduce sync objects (v4) 2017-06-14 12:10:22 +10:00
drm_fixed.h
…
drm_flip_work.h drm/kms-helpers: Use recommened kerneldoc for struct member refs 2017-01-25 16:18:57 +01:00
drm_fourcc.h drm: Add mode_config .get_format_info() hook 2017-03-22 19:45:00 +02:00
drm_framebuffer.h drm: Add GEM backed framebuffer library 2017-08-16 21:32:23 +02:00
drm_gem.h drm/gem: Add drm_gem_dumb_map_offset() 2017-07-29 13:49:55 +02:00
drm_gem_cma_helper.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
drm_gem_framebuffer_helper.h drm: Add GEM backed framebuffer library 2017-08-16 21:32:23 +02:00
drm_global.h drm: drop extern from function decls 2017-03-24 09:36:06 +01:00
drm_hashtab.h drm: drop extern from function decls 2017-03-24 09:36:06 +01:00
drm_ioctl.h drm: Return -ENOTTY for non-drm ioctls 2021-07-28 11:12:20 +02:00
drm_irq.h drm: Extract drm_vblank.[hc] 2017-06-01 08:02:14 +02:00
drm_legacy.h
…
drm_mipi_dsi.h drm/mipi-dsi: Fix byte order of 16-bit DCS set/get brightness 2023-03-11 16:26:39 +01:00
drm_mm.h lib/interval_tree: fast overlap detection 2017-09-08 18:26:49 -07:00
drm_mode_config.h drm: Create a format/modifier blob 2017-08-01 17:50:06 +01:00
drm_mode_object.h drm: Introduce drm_mode_object_{get,put}() 2017-02-28 16:14:55 +01:00
drm_modes.h drm: add helper functions for YCBCR420 handling 2017-07-14 21:23:54 +03:00
drm_modeset_helper.h
…
drm_modeset_helper_vtables.h drm: don't block fb changes for async plane updates 2019-06-15 11:55:00 +02:00
drm_modeset_lock.h drm: Remove drm_modeset_legacy_acquire_ctx and crtc->acquire_ctx 2017-04-05 09:26:45 +02:00
drm_of.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
drm_os_linux.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
drm_panel.h drm: make drm_panel.h self-contained 2017-05-16 17:17:02 +02:00
drm_pci.h drm/pci: Deprecate drm_pci_init/exit completely 2017-06-20 10:41:03 +02:00
drm_pciids.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
drm_plane.h drm: Handle properties in the core for atomic drivers 2017-08-08 14:45:09 +02:00
drm_plane_helper.h drm: Add acquire ctx parameter to ->plane_disable 2017-03-29 09:14:58 +02:00
drm_prime.h drm: Extract drm_vblank.[hc] 2017-06-01 08:02:14 +02:00
drm_print.h drm: drm_printer: add __printf validation 2017-02-26 21:43:08 +01:00
drm_property.h drm: rename, adjust and export drm_atomic_replace_property_blob 2017-07-14 15:53:06 +02:00
drm_rect.h drm/doc: move printf helpers out of drmP.h 2017-05-31 09:59:41 +02:00
drm_scdc_helper.h drm: Fix warning when building docs for scdc_helper 2017-07-31 14:24:14 +02:00
drm_simple_kms_helper.h drm: Plumb modifiers through plane init 2017-08-01 17:50:06 +01:00
drm_syncobj.h drm/syncobj: Stop reusing the same struct file for all syncobj -> fd 2018-03-28 18:24:47 +02:00
drm_sysfs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
drm_vblank.h drm/vblank: Unexport drm_vblank_cleanup 2017-06-28 12:51:13 +02:00
drm_vma_manager.h drm/i915: Prevent writing into a read-only object via a GGTT mmap 2019-11-12 19:18:49 +01:00
gma_drm.h
…
i915_component.h
…
i915_drm.h
…
i915_pciids.h x86/gpu: add CFL to early quirks 2018-02-22 15:42:18 +01:00
intel-gtt.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
intel_lpe_audio.h ALSA: x86: Register multiple PCM devices for the LPE audio card 2017-05-03 16:24:00 +03:00