diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c | 109 |
1 files changed, 81 insertions, 28 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c index a71177305bcd..a4cb23d059bd 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c @@ -29,7 +29,9 @@ #include "modules/color/color_gamma.h" #include "basics/conversion.h" -/* +/** + * DOC: overview + * * The DC interface to HW gives us the following color management blocks * per pipe (surface): * @@ -71,8 +73,8 @@ #define MAX_DRM_LUT_VALUE 0xFFFF -/* - * Initialize the color module. +/** + * amdgpu_dm_init_color_mod - Initialize the color module. * * We're not using the full color module, only certain components. * Only call setup functions for components that we need. @@ -82,7 +84,14 @@ void amdgpu_dm_init_color_mod(void) setup_x_points_distribution(); } -/* Extracts the DRM lut and lut size from a blob. */ +/** + * __extract_blob_lut - Extracts the DRM lut and lut size from a blob. + * @blob: DRM color mgmt property blob + * @size: lut size + * + * Returns: + * DRM LUT or NULL + */ static const struct drm_color_lut * __extract_blob_lut(const struct drm_property_blob *blob, uint32_t *size) { @@ -90,13 +99,18 @@ __extract_blob_lut(const struct drm_property_blob *blob, uint32_t *size) return blob ? (struct drm_color_lut *)blob->data : NULL; } -/* - * Return true if the given lut is a linear mapping of values, i.e. it acts - * like a bypass LUT. +/** + * __is_lut_linear - check if the given lut is a linear mapping of values + * @lut: given lut to check values + * @size: lut size * * It is considered linear if the lut represents: - * f(a) = (0xFF00/MAX_COLOR_LUT_ENTRIES-1)a; for integer a in - * [0, MAX_COLOR_LUT_ENTRIES) + * f(a) = (0xFF00/MAX_COLOR_LUT_ENTRIES-1)a; for integer a in [0, + * MAX_COLOR_LUT_ENTRIES) + * + * Returns: + * True if the given lut is a linear mapping of values, i.e. it acts like a + * bypass LUT. Otherwise, false. */ static bool __is_lut_linear(const struct drm_color_lut *lut, uint32_t size) { @@ -119,9 +133,13 @@ static bool __is_lut_linear(const struct drm_color_lut *lut, uint32_t size) return true; } -/* - * Convert the drm_color_lut to dc_gamma. The conversion depends on the size - * of the lut - whether or not it's legacy. +/** + * __drm_lut_to_dc_gamma - convert the drm_color_lut to dc_gamma. + * @lut: DRM lookup table for color conversion + * @gamma: DC gamma to set entries + * @is_legacy: legacy or atomic gamma + * + * The conversion depends on the size of the lut - whether or not it's legacy. */ static void __drm_lut_to_dc_gamma(const struct drm_color_lut *lut, struct dc_gamma *gamma, bool is_legacy) @@ -154,8 +172,11 @@ static void __drm_lut_to_dc_gamma(const struct drm_color_lut *lut, } } -/* - * Converts a DRM CTM to a DC CSC float matrix. +/** + * __drm_ctm_to_dc_matrix - converts a DRM CTM to a DC CSC float matrix + * @ctm: DRM color transformation matrix + * @matrix: DC CSC float matrix + * * The matrix needs to be a 3x4 (12 entry) matrix. */ static void __drm_ctm_to_dc_matrix(const struct drm_color_ctm *ctm, @@ -189,7 +210,18 @@ static void __drm_ctm_to_dc_matrix(const struct drm_color_ctm *ctm, } } -/* Calculates the legacy transfer function - only for sRGB input space. */ +/** + * __set_legacy_tf - Calculates the legacy transfer function + * @func: transfer function + * @lut: lookup table that defines the color space + * @lut_size: size of respective lut + * @has_rom: if ROM can be used for hardcoded curve + * + * Only for sRGB input space + * + * Returns: + * 0 in case of success, -ENOMEM if fails + */ static int __set_legacy_tf(struct dc_transfer_func *func, const struct drm_color_lut *lut, uint32_t lut_size, bool has_rom) @@ -218,7 +250,16 @@ static int __set_legacy_tf(struct dc_transfer_func *func, return res ? 0 : -ENOMEM; } -/* Calculates the output transfer function based on expected input space. */ +/** + * __set_output_tf - calculates the output transfer function based on expected input space. + * @func: transfer function + * @lut: lookup table that defines the color space + * @lut_size: size of respective lut + * @has_rom: if ROM can be used for hardcoded curve + * + * Returns: + * 0 in case of success. -ENOMEM if fails. + */ static int __set_output_tf(struct dc_transfer_func *func, const struct drm_color_lut *lut, uint32_t lut_size, bool has_rom) @@ -262,7 +303,16 @@ static int __set_output_tf(struct dc_transfer_func *func, return res ? 0 : -ENOMEM; } -/* Caculates the input transfer function based on expected input space. */ +/** + * __set_input_tf - calculates the input transfer function based on expected + * input space. + * @func: transfer function + * @lut: lookup table that defines the color space + * @lut_size: size of respective lut. + * + * Returns: + * 0 in case of success. -ENOMEM if fails. + */ static int __set_input_tf(struct dc_transfer_func *func, const struct drm_color_lut *lut, uint32_t lut_size) { @@ -285,13 +335,14 @@ static int __set_input_tf(struct dc_transfer_func *func, } /** - * amdgpu_dm_verify_lut_sizes + * amdgpu_dm_verify_lut_sizes - verifies if DRM luts match the hw supported sizes * @crtc_state: the DRM CRTC state * - * Verifies that the Degamma and Gamma LUTs attached to the |crtc_state| are of - * the expected size. + * Verifies that the Degamma and Gamma LUTs attached to the &crtc_state + * are of the expected size. * - * Returns 0 on success. + * Returns: + * 0 on success. -EINVAL if any lut sizes are invalid. */ int amdgpu_dm_verify_lut_sizes(const struct drm_crtc_state *crtc_state) { @@ -327,9 +378,9 @@ int amdgpu_dm_verify_lut_sizes(const struct drm_crtc_state *crtc_state) * of the HW blocks as long as the CRTC CTM always comes before the * CRTC RGM and after the CRTC DGM. * - * The CRTC RGM block will be placed in the RGM LUT block if it is non-linear. - * The CRTC DGM block will be placed in the DGM LUT block if it is non-linear. - * The CRTC CTM will be placed in the gamut remap block if it is non-linear. + * - The CRTC RGM block will be placed in the RGM LUT block if it is non-linear. + * - The CRTC DGM block will be placed in the DGM LUT block if it is non-linear. + * - The CRTC CTM will be placed in the gamut remap block if it is non-linear. * * The RGM block is typically more fully featured and accurate across * all ASICs - DCE can't support a custom non-linear CRTC DGM. @@ -338,7 +389,8 @@ int amdgpu_dm_verify_lut_sizes(const struct drm_crtc_state *crtc_state) * management at once we have to either restrict the usage of CRTC properties * or blend adjustments together. * - * Returns 0 on success. + * Returns: + * 0 on success. Error code if setup fails. */ int amdgpu_dm_update_crtc_color_mgmt(struct dm_crtc_state *crtc) { @@ -393,7 +445,7 @@ int amdgpu_dm_update_crtc_color_mgmt(struct dm_crtc_state *crtc) if (r) return r; } else if (has_regamma) { - /* CRTC RGM goes into RGM LUT. */ + /* If atomic regamma, CRTC RGM goes into RGM LUT. */ stream->out_transfer_func->type = TF_TYPE_DISTRIBUTED_POINTS; stream->out_transfer_func->tf = TRANSFER_FUNCTION_LINEAR; @@ -450,9 +502,10 @@ int amdgpu_dm_update_crtc_color_mgmt(struct dm_crtc_state *crtc) * * Update the underlying dc_stream_state's input transfer function (ITF) in * preparation for hardware commit. The transfer function used depends on - * the prepartion done on the stream for color management. + * the preparation done on the stream for color management. * - * Returns 0 on success. + * Returns: + * 0 on success. -ENOMEM if mem allocation fails. */ int amdgpu_dm_update_plane_color_mgmt(struct dm_crtc_state *crtc, struct dc_plane_state *dc_plane_state) |